Google Git
Sign in
android / platform / external / mesa3d / b7a4253ae889c3d99dc0b6b993536542abaafff1 / . / src / gallium / drivers / radeonsi / si_shader.c
blob: 1ea79f7c04ce7b22975c9b13ea09e67bf5c982aa [file] [log] [blame]
/*
* Copyright 2012 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "gallivm/lp_bld_const.h"
#include "gallivm/lp_bld_gather.h"
#include "gallivm/lp_bld_intr.h"
#include "gallivm/lp_bld_logic.h"
#include "gallivm/lp_bld_arit.h"
#include "gallivm/lp_bld_flow.h"
#include "gallivm/lp_bld_misc.h"
#include "util/u_memory.h"
#include "util/u_string.h"
#include "tgsi/tgsi_build.h"
#include "tgsi/tgsi_util.h"
#include "tgsi/tgsi_dump.h"
#include "ac_binary.h"
#include "ac_llvm_util.h"
#include "ac_exp_param.h"
#include "ac_shader_util.h"
#include "si_shader_internal.h"
#include "si_pipe.h"
#include "sid.h"
#include "compiler/nir/nir.h"
static const char *scratch_rsrc_dword0_symbol =
"SCRATCH_RSRC_DWORD0";
static const char *scratch_rsrc_dword1_symbol =
"SCRATCH_RSRC_DWORD1";
struct si_shader_output_values
{
LLVMValueRef values[4];
unsigned semantic_name;
unsigned semantic_index;
ubyte vertex_stream[4];
};
/**
* Used to collect types and other info about arguments of the LLVM function
* before the function is created.
*/
struct si_function_info {
LLVMTypeRef types[100];
LLVMValueRef *assign[100];
unsigned num_sgpr_params;
unsigned num_params;
};
enum si_arg_regfile {
ARG_SGPR,
ARG_VGPR
};
static void si_init_shader_ctx(struct si_shader_context *ctx,
struct si_screen *sscreen,
LLVMTargetMachineRef tm);
static void si_llvm_emit_barrier(const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data);
static void si_dump_shader_key(unsigned processor, const struct si_shader *shader,
FILE *f);
static void si_build_vs_prolog_function(struct si_shader_context *ctx,
union si_shader_part_key *key);
static void si_build_tcs_epilog_function(struct si_shader_context *ctx,
union si_shader_part_key *key);
static void si_build_ps_prolog_function(struct si_shader_context *ctx,
union si_shader_part_key *key);
static void si_build_ps_epilog_function(struct si_shader_context *ctx,
union si_shader_part_key *key);
/* Ideally pass the sample mask input to the PS epilog as v14, which
* is its usual location, so that the shader doesn't have to add v_mov.
*/
#define PS_EPILOG_SAMPLEMASK_MIN_LOC 14
enum {
CONST_ADDR_SPACE = 2,
LOCAL_ADDR_SPACE = 3,
};
static bool llvm_type_is_64bit(struct si_shader_context *ctx,
LLVMTypeRef type)
{
if (type == ctx->ac.i64 || type == ctx->ac.f64)
return true;
return false;
}
static bool is_merged_shader(struct si_shader *shader)
{
if (shader->selector->screen->info.chip_class <= VI)
return false;
return shader->key.as_ls ||
shader->key.as_es ||
shader->selector->type == PIPE_SHADER_TESS_CTRL ||
shader->selector->type == PIPE_SHADER_GEOMETRY;
}
static void si_init_function_info(struct si_function_info *fninfo)
{
fninfo->num_params = 0;
fninfo->num_sgpr_params = 0;
}
static unsigned add_arg_assign(struct si_function_info *fninfo,
enum si_arg_regfile regfile, LLVMTypeRef type,
LLVMValueRef *assign)
{
assert(regfile != ARG_SGPR || fninfo->num_sgpr_params == fninfo->num_params);
unsigned idx = fninfo->num_params++;
assert(idx < ARRAY_SIZE(fninfo->types));
if (regfile == ARG_SGPR)
fninfo->num_sgpr_params = fninfo->num_params;
fninfo->types[idx] = type;
fninfo->assign[idx] = assign;
return idx;
}
static unsigned add_arg(struct si_function_info *fninfo,
enum si_arg_regfile regfile, LLVMTypeRef type)
{
return add_arg_assign(fninfo, regfile, type, NULL);
}
static void add_arg_assign_checked(struct si_function_info *fninfo,
enum si_arg_regfile regfile, LLVMTypeRef type,
LLVMValueRef *assign, unsigned idx)
{
MAYBE_UNUSED unsigned actual = add_arg_assign(fninfo, regfile, type, assign);
assert(actual == idx);
}
static void add_arg_checked(struct si_function_info *fninfo,
enum si_arg_regfile regfile, LLVMTypeRef type,
unsigned idx)
{
add_arg_assign_checked(fninfo, regfile, type, NULL, idx);
}
/**
* Returns a unique index for a per-patch semantic name and index. The index
* must be less than 32, so that a 32-bit bitmask of used inputs or outputs
* can be calculated.
*/
unsigned si_shader_io_get_unique_index_patch(unsigned semantic_name, unsigned index)
{
switch (semantic_name) {
case TGSI_SEMANTIC_TESSOUTER:
return 0;
case TGSI_SEMANTIC_TESSINNER:
return 1;
case TGSI_SEMANTIC_PATCH:
assert(index < 30);
return 2 + index;
default:
assert(!"invalid semantic name");
return 0;
}
}
/**
* Returns a unique index for a semantic name and index. The index must be
* less than 64, so that a 64-bit bitmask of used inputs or outputs can be
* calculated.
*/
unsigned si_shader_io_get_unique_index(unsigned semantic_name, unsigned index)
{
switch (semantic_name) {
case TGSI_SEMANTIC_POSITION:
return 0;
case TGSI_SEMANTIC_GENERIC:
/* Since some shader stages use the the highest used IO index
* to determine the size to allocate for inputs/outputs
* (in LDS, tess and GS rings). GENERIC should be placed right
* after POSITION to make that size as small as possible.
*/
if (index < SI_MAX_IO_GENERIC)
return 1 + index;
assert(!"invalid generic index");
return 0;
case TGSI_SEMANTIC_PSIZE:
return SI_MAX_IO_GENERIC + 1;
case TGSI_SEMANTIC_CLIPDIST:
assert(index <= 1);
return SI_MAX_IO_GENERIC + 2 + index;
case TGSI_SEMANTIC_FOG:
return SI_MAX_IO_GENERIC + 4;
case TGSI_SEMANTIC_LAYER:
return SI_MAX_IO_GENERIC + 5;
case TGSI_SEMANTIC_VIEWPORT_INDEX:
return SI_MAX_IO_GENERIC + 6;
case TGSI_SEMANTIC_PRIMID:
return SI_MAX_IO_GENERIC + 7;
case TGSI_SEMANTIC_COLOR: /* these alias */
case TGSI_SEMANTIC_BCOLOR:
assert(index < 2);
return SI_MAX_IO_GENERIC + 8 + index;
case TGSI_SEMANTIC_TEXCOORD:
assert(index < 8);
assert(SI_MAX_IO_GENERIC + 10 + index < 64);
return SI_MAX_IO_GENERIC + 10 + index;
default:
assert(!"invalid semantic name");
return 0;
}
}
/**
* Get the value of a shader input parameter and extract a bitfield.
*/
static LLVMValueRef unpack_llvm_param(struct si_shader_context *ctx,
LLVMValueRef value, unsigned rshift,
unsigned bitwidth)
{
if (LLVMGetTypeKind(LLVMTypeOf(value)) == LLVMFloatTypeKind)
value = ac_to_integer(&ctx->ac, value);
if (rshift)
value = LLVMBuildLShr(ctx->ac.builder, value,
LLVMConstInt(ctx->i32, rshift, 0), "");
if (rshift + bitwidth < 32) {
unsigned mask = (1 << bitwidth) - 1;
value = LLVMBuildAnd(ctx->ac.builder, value,
LLVMConstInt(ctx->i32, mask, 0), "");
}
return value;
}
static LLVMValueRef unpack_param(struct si_shader_context *ctx,
unsigned param, unsigned rshift,
unsigned bitwidth)
{
LLVMValueRef value = LLVMGetParam(ctx->main_fn, param);
return unpack_llvm_param(ctx, value, rshift, bitwidth);
}
static LLVMValueRef get_rel_patch_id(struct si_shader_context *ctx)
{
switch (ctx->type) {
case PIPE_SHADER_TESS_CTRL:
return unpack_llvm_param(ctx, ctx->abi.tcs_rel_ids, 0, 8);
case PIPE_SHADER_TESS_EVAL:
return LLVMGetParam(ctx->main_fn,
ctx->param_tes_rel_patch_id);
default:
assert(0);
return NULL;
}
}
/* Tessellation shaders pass outputs to the next shader using LDS.
*
* LS outputs = TCS inputs
* TCS outputs = TES inputs
*
* The LDS layout is:
* - TCS inputs for patch 0
* - TCS inputs for patch 1
* - TCS inputs for patch 2 = get_tcs_in_current_patch_offset (if RelPatchID==2)
* - ...
* - TCS outputs for patch 0 = get_tcs_out_patch0_offset
* - Per-patch TCS outputs for patch 0 = get_tcs_out_patch0_patch_data_offset
* - TCS outputs for patch 1
* - Per-patch TCS outputs for patch 1
* - TCS outputs for patch 2 = get_tcs_out_current_patch_offset (if RelPatchID==2)
* - Per-patch TCS outputs for patch 2 = get_tcs_out_current_patch_data_offset (if RelPatchID==2)
* - ...
*
* All three shaders VS(LS), TCS, TES share the same LDS space.
*/
static LLVMValueRef
get_tcs_in_patch_stride(struct si_shader_context *ctx)
{
return unpack_param(ctx, ctx->param_vs_state_bits, 8, 13);
}
static unsigned get_tcs_out_vertex_dw_stride_constant(struct si_shader_context *ctx)
{
assert(ctx->type == PIPE_SHADER_TESS_CTRL);
if (ctx->shader->key.mono.u.ff_tcs_inputs_to_copy)
return util_last_bit64(ctx->shader->key.mono.u.ff_tcs_inputs_to_copy) * 4;
return util_last_bit64(ctx->shader->selector->outputs_written) * 4;
}
static LLVMValueRef get_tcs_out_vertex_dw_stride(struct si_shader_context *ctx)
{
unsigned stride = get_tcs_out_vertex_dw_stride_constant(ctx);
return LLVMConstInt(ctx->i32, stride, 0);
}
static LLVMValueRef get_tcs_out_patch_stride(struct si_shader_context *ctx)
{
if (ctx->shader->key.mono.u.ff_tcs_inputs_to_copy)
return unpack_param(ctx, ctx->param_tcs_out_lds_layout, 0, 13);
const struct tgsi_shader_info *info = &ctx->shader->selector->info;
unsigned tcs_out_vertices = info->properties[TGSI_PROPERTY_TCS_VERTICES_OUT];
unsigned vertex_dw_stride = get_tcs_out_vertex_dw_stride_constant(ctx);
unsigned num_patch_outputs = util_last_bit64(ctx->shader->selector->patch_outputs_written);
unsigned patch_dw_stride = tcs_out_vertices * vertex_dw_stride +
num_patch_outputs * 4;
return LLVMConstInt(ctx->i32, patch_dw_stride, 0);
}
static LLVMValueRef
get_tcs_out_patch0_offset(struct si_shader_context *ctx)
{
return lp_build_mul_imm(&ctx->bld_base.uint_bld,
unpack_param(ctx,
ctx->param_tcs_out_lds_offsets,
0, 16),
4);
}
static LLVMValueRef
get_tcs_out_patch0_patch_data_offset(struct si_shader_context *ctx)
{
return lp_build_mul_imm(&ctx->bld_base.uint_bld,
unpack_param(ctx,
ctx->param_tcs_out_lds_offsets,
16, 16),
4);
}
static LLVMValueRef
get_tcs_in_current_patch_offset(struct si_shader_context *ctx)
{
LLVMValueRef patch_stride = get_tcs_in_patch_stride(ctx);
LLVMValueRef rel_patch_id = get_rel_patch_id(ctx);
return LLVMBuildMul(ctx->ac.builder, patch_stride, rel_patch_id, "");
}
static LLVMValueRef
get_tcs_out_current_patch_offset(struct si_shader_context *ctx)
{
LLVMValueRef patch0_offset = get_tcs_out_patch0_offset(ctx);
LLVMValueRef patch_stride = get_tcs_out_patch_stride(ctx);
LLVMValueRef rel_patch_id = get_rel_patch_id(ctx);
return LLVMBuildAdd(ctx->ac.builder, patch0_offset,
LLVMBuildMul(ctx->ac.builder, patch_stride,
rel_patch_id, ""),
"");
}
static LLVMValueRef
get_tcs_out_current_patch_data_offset(struct si_shader_context *ctx)
{
LLVMValueRef patch0_patch_data_offset =
get_tcs_out_patch0_patch_data_offset(ctx);
LLVMValueRef patch_stride = get_tcs_out_patch_stride(ctx);
LLVMValueRef rel_patch_id = get_rel_patch_id(ctx);
return LLVMBuildAdd(ctx->ac.builder, patch0_patch_data_offset,
LLVMBuildMul(ctx->ac.builder, patch_stride,
rel_patch_id, ""),
"");
}
static LLVMValueRef get_num_tcs_out_vertices(struct si_shader_context *ctx)
{
unsigned tcs_out_vertices =
ctx->shader->selector ?
ctx->shader->selector->info.properties[TGSI_PROPERTY_TCS_VERTICES_OUT] : 0;
/* If !tcs_out_vertices, it's either the fixed-func TCS or the TCS epilog. */
if (ctx->type == PIPE_SHADER_TESS_CTRL && tcs_out_vertices)
return LLVMConstInt(ctx->i32, tcs_out_vertices, 0);
return unpack_param(ctx, ctx->param_tcs_offchip_layout, 6, 6);
}
static LLVMValueRef get_tcs_in_vertex_dw_stride(struct si_shader_context *ctx)
{
unsigned stride;
switch (ctx->type) {
case PIPE_SHADER_VERTEX:
stride = util_last_bit64(ctx->shader->selector->outputs_written);
return LLVMConstInt(ctx->i32, stride * 4, 0);
case PIPE_SHADER_TESS_CTRL:
if (ctx->screen->info.chip_class >= GFX9 &&
ctx->shader->is_monolithic) {
stride = util_last_bit64(ctx->shader->key.part.tcs.ls->outputs_written);
return LLVMConstInt(ctx->i32, stride * 4, 0);
}
return unpack_param(ctx, ctx->param_vs_state_bits, 24, 8);
default:
assert(0);
return NULL;
}
}
static LLVMValueRef get_instance_index_for_fetch(
struct si_shader_context *ctx,
unsigned param_start_instance, LLVMValueRef divisor)
{
LLVMValueRef result = ctx->abi.instance_id;
/* The division must be done before START_INSTANCE is added. */
if (divisor != ctx->i32_1)
result = LLVMBuildUDiv(ctx->ac.builder, result, divisor, "");
return LLVMBuildAdd(ctx->ac.builder, result,
LLVMGetParam(ctx->main_fn, param_start_instance), "");
}
/* Bitcast <4 x float> to <2 x double>, extract the component, and convert
* to float. */
static LLVMValueRef extract_double_to_float(struct si_shader_context *ctx,
LLVMValueRef vec4,
unsigned double_index)
{
LLVMBuilderRef builder = ctx->ac.builder;
LLVMTypeRef f64 = LLVMDoubleTypeInContext(ctx->ac.context);
LLVMValueRef dvec2 = LLVMBuildBitCast(builder, vec4,
LLVMVectorType(f64, 2), "");
LLVMValueRef index = LLVMConstInt(ctx->i32, double_index, 0);
LLVMValueRef value = LLVMBuildExtractElement(builder, dvec2, index, "");
return LLVMBuildFPTrunc(builder, value, ctx->f32, "");
}
static LLVMValueRef unpack_sint16(struct si_shader_context *ctx,
LLVMValueRef i32, unsigned index)
{
assert(index <= 1);
if (index == 1)
return LLVMBuildAShr(ctx->ac.builder, i32,
LLVMConstInt(ctx->i32, 16, 0), "");
return LLVMBuildSExt(ctx->ac.builder,
LLVMBuildTrunc(ctx->ac.builder, i32,
ctx->ac.i16, ""),
ctx->i32, "");
}
void si_llvm_load_input_vs(
struct si_shader_context *ctx,
unsigned input_index,
LLVMValueRef out[4])
{
unsigned vs_blit_property =
ctx->shader->selector->info.properties[TGSI_PROPERTY_VS_BLIT_SGPRS];
if (vs_blit_property) {
LLVMValueRef vertex_id = ctx->abi.vertex_id;
LLVMValueRef sel_x1 = LLVMBuildICmp(ctx->ac.builder,
LLVMIntULE, vertex_id,
ctx->i32_1, "");
/* Use LLVMIntNE, because we have 3 vertices and only
* the middle one should use y2.
*/
LLVMValueRef sel_y1 = LLVMBuildICmp(ctx->ac.builder,
LLVMIntNE, vertex_id,
ctx->i32_1, "");
if (input_index == 0) {
/* Position: */
LLVMValueRef x1y1 = LLVMGetParam(ctx->main_fn,
ctx->param_vs_blit_inputs);
LLVMValueRef x2y2 = LLVMGetParam(ctx->main_fn,
ctx->param_vs_blit_inputs + 1);
LLVMValueRef x1 = unpack_sint16(ctx, x1y1, 0);
LLVMValueRef y1 = unpack_sint16(ctx, x1y1, 1);
LLVMValueRef x2 = unpack_sint16(ctx, x2y2, 0);
LLVMValueRef y2 = unpack_sint16(ctx, x2y2, 1);
LLVMValueRef x = LLVMBuildSelect(ctx->ac.builder, sel_x1,
x1, x2, "");
LLVMValueRef y = LLVMBuildSelect(ctx->ac.builder, sel_y1,
y1, y2, "");
out[0] = LLVMBuildSIToFP(ctx->ac.builder, x, ctx->f32, "");
out[1] = LLVMBuildSIToFP(ctx->ac.builder, y, ctx->f32, "");
out[2] = LLVMGetParam(ctx->main_fn,
ctx->param_vs_blit_inputs + 2);
out[3] = ctx->ac.f32_1;
return;
}
/* Color or texture coordinates: */
assert(input_index == 1);
if (vs_blit_property == SI_VS_BLIT_SGPRS_POS_COLOR) {
for (int i = 0; i < 4; i++) {
out[i] = LLVMGetParam(ctx->main_fn,
ctx->param_vs_blit_inputs + 3 + i);
}
} else {
assert(vs_blit_property == SI_VS_BLIT_SGPRS_POS_TEXCOORD);
LLVMValueRef x1 = LLVMGetParam(ctx->main_fn,
ctx->param_vs_blit_inputs + 3);
LLVMValueRef y1 = LLVMGetParam(ctx->main_fn,
ctx->param_vs_blit_inputs + 4);
LLVMValueRef x2 = LLVMGetParam(ctx->main_fn,
ctx->param_vs_blit_inputs + 5);
LLVMValueRef y2 = LLVMGetParam(ctx->main_fn,
ctx->param_vs_blit_inputs + 6);
out[0] = LLVMBuildSelect(ctx->ac.builder, sel_x1,
x1, x2, "");
out[1] = LLVMBuildSelect(ctx->ac.builder, sel_y1,
y1, y2, "");
out[2] = LLVMGetParam(ctx->main_fn,
ctx->param_vs_blit_inputs + 7);
out[3] = LLVMGetParam(ctx->main_fn,
ctx->param_vs_blit_inputs + 8);
}
return;
}
unsigned chan;
unsigned fix_fetch;
unsigned num_fetches;
unsigned fetch_stride;
LLVMValueRef t_list_ptr;
LLVMValueRef t_offset;
LLVMValueRef t_list;
LLVMValueRef vertex_index;
LLVMValueRef input[3];
/* Load the T list */
t_list_ptr = LLVMGetParam(ctx->main_fn, ctx->param_vertex_buffers);
t_offset = LLVMConstInt(ctx->i32, input_index, 0);
t_list = ac_build_load_to_sgpr(&ctx->ac, t_list_ptr, t_offset);
vertex_index = LLVMGetParam(ctx->main_fn,
ctx->param_vertex_index0 +
input_index);
fix_fetch = ctx->shader->key.mono.vs_fix_fetch[input_index];
/* Do multiple loads for special formats. */
switch (fix_fetch) {
case SI_FIX_FETCH_RGB_64_FLOAT:
num_fetches = 3; /* 3 2-dword loads */
fetch_stride = 8;
break;
case SI_FIX_FETCH_RGBA_64_FLOAT:
num_fetches = 2; /* 2 4-dword loads */
fetch_stride = 16;
break;
case SI_FIX_FETCH_RGB_8:
case SI_FIX_FETCH_RGB_8_INT:
num_fetches = 3;
fetch_stride = 1;
break;
case SI_FIX_FETCH_RGB_16:
case SI_FIX_FETCH_RGB_16_INT:
num_fetches = 3;
fetch_stride = 2;
break;
default:
num_fetches = 1;
fetch_stride = 0;
}
for (unsigned i = 0; i < num_fetches; i++) {
LLVMValueRef voffset = LLVMConstInt(ctx->i32, fetch_stride * i, 0);
input[i] = ac_build_buffer_load_format(&ctx->ac, t_list,
vertex_index, voffset,
true);
}
/* Break up the vec4 into individual components */
for (chan = 0; chan < 4; chan++) {
LLVMValueRef llvm_chan = LLVMConstInt(ctx->i32, chan, 0);
out[chan] = LLVMBuildExtractElement(ctx->ac.builder,
input[0], llvm_chan, "");
}
switch (fix_fetch) {
case SI_FIX_FETCH_A2_SNORM:
case SI_FIX_FETCH_A2_SSCALED:
case SI_FIX_FETCH_A2_SINT: {
/* The hardware returns an unsigned value; convert it to a
* signed one.
*/
LLVMValueRef tmp = out[3];
LLVMValueRef c30 = LLVMConstInt(ctx->i32, 30, 0);
/* First, recover the sign-extended signed integer value. */
if (fix_fetch == SI_FIX_FETCH_A2_SSCALED)
tmp = LLVMBuildFPToUI(ctx->ac.builder, tmp, ctx->i32, "");
else
tmp = ac_to_integer(&ctx->ac, tmp);
/* For the integer-like cases, do a natural sign extension.
*
* For the SNORM case, the values are 0.0, 0.333, 0.666, 1.0
* and happen to contain 0, 1, 2, 3 as the two LSBs of the
* exponent.
*/
tmp = LLVMBuildShl(ctx->ac.builder, tmp,
fix_fetch == SI_FIX_FETCH_A2_SNORM ?
LLVMConstInt(ctx->i32, 7, 0) : c30, "");
tmp = LLVMBuildAShr(ctx->ac.builder, tmp, c30, "");
/* Convert back to the right type. */
if (fix_fetch == SI_FIX_FETCH_A2_SNORM) {
LLVMValueRef clamp;
LLVMValueRef neg_one = LLVMConstReal(ctx->f32, -1.0);
tmp = LLVMBuildSIToFP(ctx->ac.builder, tmp, ctx->f32, "");
clamp = LLVMBuildFCmp(ctx->ac.builder, LLVMRealULT, tmp, neg_one, "");
tmp = LLVMBuildSelect(ctx->ac.builder, clamp, neg_one, tmp, "");
} else if (fix_fetch == SI_FIX_FETCH_A2_SSCALED) {
tmp = LLVMBuildSIToFP(ctx->ac.builder, tmp, ctx->f32, "");
}
out[3] = tmp;
break;
}
case SI_FIX_FETCH_RGBA_32_UNORM:
case SI_FIX_FETCH_RGBX_32_UNORM:
for (chan = 0; chan < 4; chan++) {
out[chan] = ac_to_integer(&ctx->ac, out[chan]);
out[chan] = LLVMBuildUIToFP(ctx->ac.builder,
out[chan], ctx->f32, "");
out[chan] = LLVMBuildFMul(ctx->ac.builder, out[chan],
LLVMConstReal(ctx->f32, 1.0 / UINT_MAX), "");
}
/* RGBX UINT returns 1 in alpha, which would be rounded to 0 by normalizing. */
if (fix_fetch == SI_FIX_FETCH_RGBX_32_UNORM)
out[3] = LLVMConstReal(ctx->f32, 1);
break;
case SI_FIX_FETCH_RGBA_32_SNORM:
case SI_FIX_FETCH_RGBX_32_SNORM:
case SI_FIX_FETCH_RGBA_32_FIXED:
case SI_FIX_FETCH_RGBX_32_FIXED: {
double scale;
if (fix_fetch >= SI_FIX_FETCH_RGBA_32_FIXED)
scale = 1.0 / 0x10000;
else
scale = 1.0 / INT_MAX;
for (chan = 0; chan < 4; chan++) {
out[chan] = ac_to_integer(&ctx->ac, out[chan]);
out[chan] = LLVMBuildSIToFP(ctx->ac.builder,
out[chan], ctx->f32, "");
out[chan] = LLVMBuildFMul(ctx->ac.builder, out[chan],
LLVMConstReal(ctx->f32, scale), "");
}
/* RGBX SINT returns 1 in alpha, which would be rounded to 0 by normalizing. */
if (fix_fetch == SI_FIX_FETCH_RGBX_32_SNORM ||
fix_fetch == SI_FIX_FETCH_RGBX_32_FIXED)
out[3] = LLVMConstReal(ctx->f32, 1);
break;
}
case SI_FIX_FETCH_RGBA_32_USCALED:
for (chan = 0; chan < 4; chan++) {
out[chan] = ac_to_integer(&ctx->ac, out[chan]);
out[chan] = LLVMBuildUIToFP(ctx->ac.builder,
out[chan], ctx->f32, "");
}
break;
case SI_FIX_FETCH_RGBA_32_SSCALED:
for (chan = 0; chan < 4; chan++) {
out[chan] = ac_to_integer(&ctx->ac, out[chan]);
out[chan] = LLVMBuildSIToFP(ctx->ac.builder,
out[chan], ctx->f32, "");
}
break;
case SI_FIX_FETCH_RG_64_FLOAT:
for (chan = 0; chan < 2; chan++)
out[chan] = extract_double_to_float(ctx, input[0], chan);
out[2] = LLVMConstReal(ctx->f32, 0);
out[3] = LLVMConstReal(ctx->f32, 1);
break;
case SI_FIX_FETCH_RGB_64_FLOAT:
for (chan = 0; chan < 3; chan++)
out[chan] = extract_double_to_float(ctx, input[chan], 0);
out[3] = LLVMConstReal(ctx->f32, 1);
break;
case SI_FIX_FETCH_RGBA_64_FLOAT:
for (chan = 0; chan < 4; chan++) {
out[chan] = extract_double_to_float(ctx, input[chan / 2],
chan % 2);
}
break;
case SI_FIX_FETCH_RGB_8:
case SI_FIX_FETCH_RGB_8_INT:
case SI_FIX_FETCH_RGB_16:
case SI_FIX_FETCH_RGB_16_INT:
for (chan = 0; chan < 3; chan++) {
out[chan] = LLVMBuildExtractElement(ctx->ac.builder,
input[chan],
ctx->i32_0, "");
}
if (fix_fetch == SI_FIX_FETCH_RGB_8 ||
fix_fetch == SI_FIX_FETCH_RGB_16) {
out[3] = LLVMConstReal(ctx->f32, 1);
} else {
out[3] = ac_to_float(&ctx->ac, ctx->i32_1);
}
break;
}
}
static void declare_input_vs(
struct si_shader_context *ctx,
unsigned input_index,
const struct tgsi_full_declaration *decl,
LLVMValueRef out[4])
{
si_llvm_load_input_vs(ctx, input_index, out);
}
static LLVMValueRef get_primitive_id(struct si_shader_context *ctx,
unsigned swizzle)
{
if (swizzle > 0)
return ctx->i32_0;
switch (ctx->type) {
case PIPE_SHADER_VERTEX:
return LLVMGetParam(ctx->main_fn,
ctx->param_vs_prim_id);
case PIPE_SHADER_TESS_CTRL:
return ctx->abi.tcs_patch_id;
case PIPE_SHADER_TESS_EVAL:
return ctx->abi.tes_patch_id;
case PIPE_SHADER_GEOMETRY:
return ctx->abi.gs_prim_id;
default:
assert(0);
return ctx->i32_0;
}
}
/**
* Return the value of tgsi_ind_register for indexing.
* This is the indirect index with the constant offset added to it.
*/
LLVMValueRef si_get_indirect_index(struct si_shader_context *ctx,
const struct tgsi_ind_register *ind,
unsigned addr_mul,
int rel_index)
{
LLVMValueRef result;
if (ind->File == TGSI_FILE_ADDRESS) {
result = ctx->addrs[ind->Index][ind->Swizzle];
result = LLVMBuildLoad(ctx->ac.builder, result, "");
} else {
struct tgsi_full_src_register src = {};
src.Register.File = ind->File;
src.Register.Index = ind->Index;
/* Set the second index to 0 for constants. */
if (ind->File == TGSI_FILE_CONSTANT)
src.Register.Dimension = 1;
result = ctx->bld_base.emit_fetch_funcs[ind->File](&ctx->bld_base, &src,
TGSI_TYPE_SIGNED,
ind->Swizzle);
result = ac_to_integer(&ctx->ac, result);
}
if (addr_mul != 1)
result = LLVMBuildMul(ctx->ac.builder, result,
LLVMConstInt(ctx->i32, addr_mul, 0), "");
result = LLVMBuildAdd(ctx->ac.builder, result,
LLVMConstInt(ctx->i32, rel_index, 0), "");
return result;
}
/**
* Like si_get_indirect_index, but restricts the return value to a (possibly
* undefined) value inside [0..num).
*/
LLVMValueRef si_get_bounded_indirect_index(struct si_shader_context *ctx,
const struct tgsi_ind_register *ind,
int rel_index, unsigned num)
{
LLVMValueRef result = si_get_indirect_index(ctx, ind, 1, rel_index);
return si_llvm_bound_index(ctx, result, num);
}
static LLVMValueRef get_dw_address_from_generic_indices(struct si_shader_context *ctx,
LLVMValueRef vertex_dw_stride,
LLVMValueRef base_addr,
LLVMValueRef vertex_index,
LLVMValueRef param_index,
unsigned input_index,
ubyte *name,
ubyte *index,
bool is_patch)
{
if (vertex_dw_stride) {
base_addr = LLVMBuildAdd(ctx->ac.builder, base_addr,
LLVMBuildMul(ctx->ac.builder, vertex_index,
vertex_dw_stride, ""), "");
}
if (param_index) {
base_addr = LLVMBuildAdd(ctx->ac.builder, base_addr,
LLVMBuildMul(ctx->ac.builder, param_index,
LLVMConstInt(ctx->i32, 4, 0), ""), "");
}
int param = is_patch ?
si_shader_io_get_unique_index_patch(name[input_index],
index[input_index]) :
si_shader_io_get_unique_index(name[input_index],
index[input_index]);
/* Add the base address of the element. */
return LLVMBuildAdd(ctx->ac.builder, base_addr,
LLVMConstInt(ctx->i32, param * 4, 0), "");
}
/**
* Calculate a dword address given an input or output register and a stride.
*/
static LLVMValueRef get_dw_address(struct si_shader_context *ctx,
const struct tgsi_full_dst_register *dst,
const struct tgsi_full_src_register *src,
LLVMValueRef vertex_dw_stride,
LLVMValueRef base_addr)
{
struct tgsi_shader_info *info = &ctx->shader->selector->info;
ubyte *name, *index, *array_first;
int input_index;
struct tgsi_full_dst_register reg;
LLVMValueRef vertex_index = NULL;
LLVMValueRef ind_index = NULL;
/* Set the register description. The address computation is the same
* for sources and destinations. */
if (src) {
reg.Register.File = src->Register.File;
reg.Register.Index = src->Register.Index;
reg.Register.Indirect = src->Register.Indirect;
reg.Register.Dimension = src->Register.Dimension;
reg.Indirect = src->Indirect;
reg.Dimension = src->Dimension;
reg.DimIndirect = src->DimIndirect;
} else
reg = *dst;
/* If the register is 2-dimensional (e.g. an array of vertices
* in a primitive), calculate the base address of the vertex. */
if (reg.Register.Dimension) {
if (reg.Dimension.Indirect)
vertex_index = si_get_indirect_index(ctx, &reg.DimIndirect,
1, reg.Dimension.Index);
else
vertex_index = LLVMConstInt(ctx->i32, reg.Dimension.Index, 0);
}
/* Get information about the register. */
if (reg.Register.File == TGSI_FILE_INPUT) {
name = info->input_semantic_name;
index = info->input_semantic_index;
array_first = info->input_array_first;
} else if (reg.Register.File == TGSI_FILE_OUTPUT) {
name = info->output_semantic_name;
index = info->output_semantic_index;
array_first = info->output_array_first;
} else {
assert(0);
return NULL;
}
if (reg.Register.Indirect) {
/* Add the relative address of the element. */
if (reg.Indirect.ArrayID)
input_index = array_first[reg.Indirect.ArrayID];
else
input_index = reg.Register.Index;
ind_index = si_get_indirect_index(ctx, &reg.Indirect,
1, reg.Register.Index - input_index);
} else {
input_index = reg.Register.Index;
}
return get_dw_address_from_generic_indices(ctx, vertex_dw_stride,
base_addr, vertex_index,
ind_index, input_index,
name, index,
!reg.Register.Dimension);
}
/* The offchip buffer layout for TCS->TES is
*
* - attribute 0 of patch 0 vertex 0
* - attribute 0 of patch 0 vertex 1
* - attribute 0 of patch 0 vertex 2
* ...
* - attribute 0 of patch 1 vertex 0
* - attribute 0 of patch 1 vertex 1
* ...
* - attribute 1 of patch 0 vertex 0
* - attribute 1 of patch 0 vertex 1
* ...
* - per patch attribute 0 of patch 0
* - per patch attribute 0 of patch 1
* ...
*
* Note that every attribute has 4 components.
*/
static LLVMValueRef get_tcs_tes_buffer_address(struct si_shader_context *ctx,
LLVMValueRef rel_patch_id,
LLVMValueRef vertex_index,
LLVMValueRef param_index)
{
LLVMValueRef base_addr, vertices_per_patch, num_patches, total_vertices;
LLVMValueRef param_stride, constant16;
vertices_per_patch = get_num_tcs_out_vertices(ctx);
num_patches = unpack_param(ctx, ctx->param_tcs_offchip_layout, 0, 6);
total_vertices = LLVMBuildMul(ctx->ac.builder, vertices_per_patch,
num_patches, "");
constant16 = LLVMConstInt(ctx->i32, 16, 0);
if (vertex_index) {
base_addr = LLVMBuildMul(ctx->ac.builder, rel_patch_id,
vertices_per_patch, "");
base_addr = LLVMBuildAdd(ctx->ac.builder, base_addr,
vertex_index, "");
param_stride = total_vertices;
} else {
base_addr = rel_patch_id;
param_stride = num_patches;
}
base_addr = LLVMBuildAdd(ctx->ac.builder, base_addr,
LLVMBuildMul(ctx->ac.builder, param_index,
param_stride, ""), "");
base_addr = LLVMBuildMul(ctx->ac.builder, base_addr, constant16, "");
if (!vertex_index) {
LLVMValueRef patch_data_offset =
unpack_param(ctx, ctx->param_tcs_offchip_layout, 12, 20);
base_addr = LLVMBuildAdd(ctx->ac.builder, base_addr,
patch_data_offset, "");
}
return base_addr;
}
/* This is a generic helper that can be shared by the NIR and TGSI backends */
static LLVMValueRef get_tcs_tes_buffer_address_from_generic_indices(
struct si_shader_context *ctx,
LLVMValueRef vertex_index,
LLVMValueRef param_index,
unsigned param_base,
ubyte *name,
ubyte *index,
bool is_patch)
{
unsigned param_index_base;
param_index_base = is_patch ?
si_shader_io_get_unique_index_patch(name[param_base], index[param_base]) :
si_shader_io_get_unique_index(name[param_base], index[param_base]);
if (param_index) {
param_index = LLVMBuildAdd(ctx->ac.builder, param_index,
LLVMConstInt(ctx->i32, param_index_base, 0),
"");
} else {
param_index = LLVMConstInt(ctx->i32, param_index_base, 0);
}
return get_tcs_tes_buffer_address(ctx, get_rel_patch_id(ctx),
vertex_index, param_index);
}
static LLVMValueRef get_tcs_tes_buffer_address_from_reg(
struct si_shader_context *ctx,
const struct tgsi_full_dst_register *dst,
const struct tgsi_full_src_register *src)
{
struct tgsi_shader_info *info = &ctx->shader->selector->info;
ubyte *name, *index, *array_first;
struct tgsi_full_src_register reg;
LLVMValueRef vertex_index = NULL;
LLVMValueRef param_index = NULL;
unsigned param_base;
reg = src ? *src : tgsi_full_src_register_from_dst(dst);
if (reg.Register.Dimension) {
if (reg.Dimension.Indirect)
vertex_index = si_get_indirect_index(ctx, &reg.DimIndirect,
1, reg.Dimension.Index);
else
vertex_index = LLVMConstInt(ctx->i32, reg.Dimension.Index, 0);
}
/* Get information about the register. */
if (reg.Register.File == TGSI_FILE_INPUT) {
name = info->input_semantic_name;
index = info->input_semantic_index;
array_first = info->input_array_first;
} else if (reg.Register.File == TGSI_FILE_OUTPUT) {
name = info->output_semantic_name;
index = info->output_semantic_index;
array_first = info->output_array_first;
} else {
assert(0);
return NULL;
}
if (reg.Register.Indirect) {
if (reg.Indirect.ArrayID)
param_base = array_first[reg.Indirect.ArrayID];
else
param_base = reg.Register.Index;
param_index = si_get_indirect_index(ctx, &reg.Indirect,
1, reg.Register.Index - param_base);
} else {
param_base = reg.Register.Index;
}
return get_tcs_tes_buffer_address_from_generic_indices(ctx, vertex_index,
param_index, param_base,
name, index, !reg.Register.Dimension);
}
static LLVMValueRef buffer_load(struct lp_build_tgsi_context *bld_base,
LLVMTypeRef type, unsigned swizzle,
LLVMValueRef buffer, LLVMValueRef offset,
LLVMValueRef base, bool can_speculate)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef value, value2;
LLVMTypeRef vec_type = LLVMVectorType(type, 4);
if (swizzle == ~0) {
value = ac_build_buffer_load(&ctx->ac, buffer, 4, NULL, base, offset,
0, 1, 0, can_speculate, false);
return LLVMBuildBitCast(ctx->ac.builder, value, vec_type, "");
}
if (!llvm_type_is_64bit(ctx, type)) {
value = ac_build_buffer_load(&ctx->ac, buffer, 4, NULL, base, offset,
0, 1, 0, can_speculate, false);
value = LLVMBuildBitCast(ctx->ac.builder, value, vec_type, "");
return LLVMBuildExtractElement(ctx->ac.builder, value,
LLVMConstInt(ctx->i32, swizzle, 0), "");
}
value = ac_build_buffer_load(&ctx->ac, buffer, 1, NULL, base, offset,
swizzle * 4, 1, 0, can_speculate, false);
value2 = ac_build_buffer_load(&ctx->ac, buffer, 1, NULL, base, offset,
swizzle * 4 + 4, 1, 0, can_speculate, false);
return si_llvm_emit_fetch_64bit(bld_base, type, value, value2);
}
/**
* Load from LDS.
*
* \param type output value type
* \param swizzle offset (typically 0..3); it can be ~0, which loads a vec4
* \param dw_addr address in dwords
*/
static LLVMValueRef lds_load(struct lp_build_tgsi_context *bld_base,
LLVMTypeRef type, unsigned swizzle,
LLVMValueRef dw_addr)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef value;
if (swizzle == ~0) {
LLVMValueRef values[TGSI_NUM_CHANNELS];
for (unsigned chan = 0; chan < TGSI_NUM_CHANNELS; chan++)
values[chan] = lds_load(bld_base, type, chan, dw_addr);
return lp_build_gather_values(&ctx->gallivm, values,
TGSI_NUM_CHANNELS);
}
/* Split 64-bit loads. */
if (llvm_type_is_64bit(ctx, type)) {
LLVMValueRef lo, hi;
lo = lds_load(bld_base, ctx->i32, swizzle, dw_addr);
hi = lds_load(bld_base, ctx->i32, swizzle + 1, dw_addr);
return si_llvm_emit_fetch_64bit(bld_base, type, lo, hi);
}
dw_addr = lp_build_add(&bld_base->uint_bld, dw_addr,
LLVMConstInt(ctx->i32, swizzle, 0));
value = ac_lds_load(&ctx->ac, dw_addr);
return LLVMBuildBitCast(ctx->ac.builder, value, type, "");
}
/**
* Store to LDS.
*
* \param swizzle offset (typically 0..3)
* \param dw_addr address in dwords
* \param value value to store
*/
static void lds_store(struct si_shader_context *ctx,
unsigned dw_offset_imm, LLVMValueRef dw_addr,
LLVMValueRef value)
{
dw_addr = lp_build_add(&ctx->bld_base.uint_bld, dw_addr,
LLVMConstInt(ctx->i32, dw_offset_imm, 0));
ac_lds_store(&ctx->ac, dw_addr, value);
}
static LLVMValueRef desc_from_addr_base64k(struct si_shader_context *ctx,
unsigned param)
{
LLVMBuilderRef builder = ctx->ac.builder;
LLVMValueRef addr = LLVMGetParam(ctx->main_fn, param);
addr = LLVMBuildZExt(builder, addr, ctx->i64, "");
addr = LLVMBuildShl(builder, addr, LLVMConstInt(ctx->i64, 16, 0), "");
uint64_t desc2 = 0xffffffff;
uint64_t desc3 = S_008F0C_DST_SEL_X(V_008F0C_SQ_SEL_X) |
S_008F0C_DST_SEL_Y(V_008F0C_SQ_SEL_Y) |
S_008F0C_DST_SEL_Z(V_008F0C_SQ_SEL_Z) |
S_008F0C_DST_SEL_W(V_008F0C_SQ_SEL_W) |
S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) |
S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32);
LLVMValueRef hi = LLVMConstInt(ctx->i64, desc2 | (desc3 << 32), 0);
LLVMValueRef desc = LLVMGetUndef(LLVMVectorType(ctx->i64, 2));
desc = LLVMBuildInsertElement(builder, desc, addr, ctx->i32_0, "");
desc = LLVMBuildInsertElement(builder, desc, hi, ctx->i32_1, "");
return LLVMBuildBitCast(builder, desc, ctx->v4i32, "");
}
static LLVMValueRef fetch_input_tcs(
struct lp_build_tgsi_context *bld_base,
const struct tgsi_full_src_register *reg,
enum tgsi_opcode_type type, unsigned swizzle)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef dw_addr, stride;
stride = get_tcs_in_vertex_dw_stride(ctx);
dw_addr = get_tcs_in_current_patch_offset(ctx);
dw_addr = get_dw_address(ctx, NULL, reg, stride, dw_addr);
return lds_load(bld_base, tgsi2llvmtype(bld_base, type), swizzle, dw_addr);
}
static LLVMValueRef si_nir_load_tcs_varyings(struct ac_shader_abi *abi,
LLVMValueRef vertex_index,
LLVMValueRef param_index,
unsigned const_index,
unsigned location,
unsigned driver_location,
unsigned component,
unsigned num_components,
bool is_patch,
bool is_compact,
bool load_input)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct tgsi_shader_info *info = &ctx->shader->selector->info;
struct lp_build_tgsi_context *bld_base = &ctx->bld_base;
LLVMValueRef dw_addr, stride;
driver_location = driver_location / 4;
if (load_input) {
stride = get_tcs_in_vertex_dw_stride(ctx);
dw_addr = get_tcs_in_current_patch_offset(ctx);
} else {
if (is_patch) {
stride = NULL;
dw_addr = get_tcs_out_current_patch_data_offset(ctx);
} else {
stride = get_tcs_out_vertex_dw_stride(ctx);
dw_addr = get_tcs_out_current_patch_offset(ctx);
}
}
if (param_index) {
/* Add the constant index to the indirect index */
param_index = LLVMBuildAdd(ctx->ac.builder, param_index,
LLVMConstInt(ctx->i32, const_index, 0), "");
} else {
param_index = LLVMConstInt(ctx->i32, const_index, 0);
}
dw_addr = get_dw_address_from_generic_indices(ctx, stride, dw_addr,
vertex_index, param_index,
driver_location,
info->input_semantic_name,
info->input_semantic_index,
is_patch);
LLVMValueRef value[4];
for (unsigned i = 0; i < num_components + component; i++) {
value[i] = lds_load(bld_base, ctx->i32, i, dw_addr);
}
return ac_build_varying_gather_values(&ctx->ac, value, num_components, component);
}
static LLVMValueRef fetch_output_tcs(
struct lp_build_tgsi_context *bld_base,
const struct tgsi_full_src_register *reg,
enum tgsi_opcode_type type, unsigned swizzle)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef dw_addr, stride;
if (reg->Register.Dimension) {
stride = get_tcs_out_vertex_dw_stride(ctx);
dw_addr = get_tcs_out_current_patch_offset(ctx);
dw_addr = get_dw_address(ctx, NULL, reg, stride, dw_addr);
} else {
dw_addr = get_tcs_out_current_patch_data_offset(ctx);
dw_addr = get_dw_address(ctx, NULL, reg, NULL, dw_addr);
}
return lds_load(bld_base, tgsi2llvmtype(bld_base, type), swizzle, dw_addr);
}
static LLVMValueRef fetch_input_tes(
struct lp_build_tgsi_context *bld_base,
const struct tgsi_full_src_register *reg,
enum tgsi_opcode_type type, unsigned swizzle)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef buffer, base, addr;
buffer = desc_from_addr_base64k(ctx, ctx->param_tcs_offchip_addr_base64k);
base = LLVMGetParam(ctx->main_fn, ctx->param_tcs_offchip_offset);
addr = get_tcs_tes_buffer_address_from_reg(ctx, NULL, reg);
return buffer_load(bld_base, tgsi2llvmtype(bld_base, type), swizzle,
buffer, base, addr, true);
}
LLVMValueRef si_nir_load_input_tes(struct ac_shader_abi *abi,
LLVMValueRef vertex_index,
LLVMValueRef param_index,
unsigned const_index,
unsigned location,
unsigned driver_location,
unsigned component,
unsigned num_components,
bool is_patch,
bool is_compact,
bool load_input)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct tgsi_shader_info *info = &ctx->shader->selector->info;
LLVMValueRef buffer, base, addr;
driver_location = driver_location / 4;
buffer = desc_from_addr_base64k(ctx, ctx->param_tcs_offchip_addr_base64k);
base = LLVMGetParam(ctx->main_fn, ctx->param_tcs_offchip_offset);
if (param_index) {
/* Add the constant index to the indirect index */
param_index = LLVMBuildAdd(ctx->ac.builder, param_index,
LLVMConstInt(ctx->i32, const_index, 0), "");
} else {
param_index = LLVMConstInt(ctx->i32, const_index, 0);
}
addr = get_tcs_tes_buffer_address_from_generic_indices(ctx, vertex_index,
param_index, driver_location,
info->input_semantic_name,
info->input_semantic_index,
is_patch);
/* TODO: This will generate rather ordinary llvm code, although it
* should be easy for the optimiser to fix up. In future we might want
* to refactor buffer_load(), but for now this maximises code sharing
* between the NIR and TGSI backends.
*/
LLVMValueRef value[4];
for (unsigned i = component; i < num_components + component; i++) {
value[i] = buffer_load(&ctx->bld_base, ctx->i32, i, buffer, base, addr, true);
}
return ac_build_varying_gather_values(&ctx->ac, value, num_components, component);
}
static void store_output_tcs(struct lp_build_tgsi_context *bld_base,
const struct tgsi_full_instruction *inst,
const struct tgsi_opcode_info *info,
unsigned index,
LLVMValueRef dst[4])
{
struct si_shader_context *ctx = si_shader_context(bld_base);
const struct tgsi_full_dst_register *reg = &inst->Dst[index];
const struct tgsi_shader_info *sh_info = &ctx->shader->selector->info;
unsigned chan_index;
LLVMValueRef dw_addr, stride;
LLVMValueRef buffer, base, buf_addr;
LLVMValueRef values[4];
bool skip_lds_store;
bool is_tess_factor = false, is_tess_inner = false;
/* Only handle per-patch and per-vertex outputs here.
* Vectors will be lowered to scalars and this function will be called again.
*/
if (reg->Register.File != TGSI_FILE_OUTPUT ||
(dst[0] && LLVMGetTypeKind(LLVMTypeOf(dst[0])) == LLVMVectorTypeKind)) {
si_llvm_emit_store(bld_base, inst, info, index, dst);
return;
}
if (reg->Register.Dimension) {
stride = get_tcs_out_vertex_dw_stride(ctx);
dw_addr = get_tcs_out_current_patch_offset(ctx);
dw_addr = get_dw_address(ctx, reg, NULL, stride, dw_addr);
skip_lds_store = !sh_info->reads_pervertex_outputs;
} else {
dw_addr = get_tcs_out_current_patch_data_offset(ctx);
dw_addr = get_dw_address(ctx, reg, NULL, NULL, dw_addr);
skip_lds_store = !sh_info->reads_perpatch_outputs;
if (!reg->Register.Indirect) {
int name = sh_info->output_semantic_name[reg->Register.Index];
/* Always write tess factors into LDS for the TCS epilog. */
if (name == TGSI_SEMANTIC_TESSINNER ||
name == TGSI_SEMANTIC_TESSOUTER) {
/* The epilog doesn't read LDS if invocation 0 defines tess factors. */
skip_lds_store = !sh_info->reads_tessfactor_outputs &&
ctx->shader->selector->tcs_info.tessfactors_are_def_in_all_invocs;
is_tess_factor = true;
is_tess_inner = name == TGSI_SEMANTIC_TESSINNER;
}
}
}
buffer = desc_from_addr_base64k(ctx, ctx->param_tcs_offchip_addr_base64k);
base = LLVMGetParam(ctx->main_fn, ctx->param_tcs_offchip_offset);
buf_addr = get_tcs_tes_buffer_address_from_reg(ctx, reg, NULL);
uint32_t writemask = reg->Register.WriteMask;
while (writemask) {
chan_index = u_bit_scan(&writemask);
LLVMValueRef value = dst[chan_index];
if (inst->Instruction.Saturate)
value = ac_build_clamp(&ctx->ac, value);
/* Skip LDS stores if there is no LDS read of this output. */
if (!skip_lds_store)
lds_store(ctx, chan_index, dw_addr, value);
value = ac_to_integer(&ctx->ac, value);
values[chan_index] = value;
if (reg->Register.WriteMask != 0xF && !is_tess_factor) {
ac_build_buffer_store_dword(&ctx->ac, buffer, value, 1,
buf_addr, base,
4 * chan_index, 1, 0, true, false);
}
/* Write tess factors into VGPRs for the epilog. */
if (is_tess_factor &&
ctx->shader->selector->tcs_info.tessfactors_are_def_in_all_invocs) {
if (!is_tess_inner) {
LLVMBuildStore(ctx->ac.builder, value, /* outer */
ctx->invoc0_tess_factors[chan_index]);
} else if (chan_index < 2) {
LLVMBuildStore(ctx->ac.builder, value, /* inner */
ctx->invoc0_tess_factors[4 + chan_index]);
}
}
}
if (reg->Register.WriteMask == 0xF && !is_tess_factor) {
LLVMValueRef value = lp_build_gather_values(&ctx->gallivm,
values, 4);
ac_build_buffer_store_dword(&ctx->ac, buffer, value, 4, buf_addr,
base, 0, 1, 0, true, false);
}
}
static void si_nir_store_output_tcs(struct ac_shader_abi *abi,
const struct nir_variable *var,
LLVMValueRef vertex_index,
LLVMValueRef param_index,
unsigned const_index,
LLVMValueRef src,
unsigned writemask)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct tgsi_shader_info *info = &ctx->shader->selector->info;
const unsigned component = var->data.location_frac;
const bool is_patch = var->data.patch;
unsigned driver_location = var->data.driver_location;
LLVMValueRef dw_addr, stride;
LLVMValueRef buffer, base, addr;
LLVMValueRef values[4];
bool skip_lds_store;
bool is_tess_factor = false, is_tess_inner = false;
driver_location = driver_location / 4;
if (param_index) {
/* Add the constant index to the indirect index */
param_index = LLVMBuildAdd(ctx->ac.builder, param_index,
LLVMConstInt(ctx->i32, const_index, 0), "");
} else {
if (const_index != 0)
param_index = LLVMConstInt(ctx->i32, const_index, 0);
}
if (!is_patch) {
stride = get_tcs_out_vertex_dw_stride(ctx);
dw_addr = get_tcs_out_current_patch_offset(ctx);
dw_addr = get_dw_address_from_generic_indices(ctx, stride, dw_addr,
vertex_index, param_index,
driver_location,
info->output_semantic_name,
info->output_semantic_index,
is_patch);
skip_lds_store = !info->reads_pervertex_outputs;
} else {
dw_addr = get_tcs_out_current_patch_data_offset(ctx);
dw_addr = get_dw_address_from_generic_indices(ctx, NULL, dw_addr,
vertex_index, param_index,
driver_location,
info->output_semantic_name,
info->output_semantic_index,
is_patch);
skip_lds_store = !info->reads_perpatch_outputs;
if (!param_index) {
int name = info->output_semantic_name[driver_location];
/* Always write tess factors into LDS for the TCS epilog. */
if (name == TGSI_SEMANTIC_TESSINNER ||
name == TGSI_SEMANTIC_TESSOUTER) {
/* The epilog doesn't read LDS if invocation 0 defines tess factors. */
skip_lds_store = !info->reads_tessfactor_outputs &&
ctx->shader->selector->tcs_info.tessfactors_are_def_in_all_invocs;
is_tess_factor = true;
is_tess_inner = name == TGSI_SEMANTIC_TESSINNER;
}
}
}
buffer = desc_from_addr_base64k(ctx, ctx->param_tcs_offchip_addr_base64k);
base = LLVMGetParam(ctx->main_fn, ctx->param_tcs_offchip_offset);
addr = get_tcs_tes_buffer_address_from_generic_indices(ctx, vertex_index,
param_index, driver_location,
info->output_semantic_name,
info->output_semantic_index,
is_patch);
for (unsigned chan = 0; chan < 4; chan++) {
if (!(writemask & (1 << chan)))
continue;
LLVMValueRef value = ac_llvm_extract_elem(&ctx->ac, src, chan - component);
/* Skip LDS stores if there is no LDS read of this output. */
if (!skip_lds_store)
ac_lds_store(&ctx->ac, dw_addr, value);
value = ac_to_integer(&ctx->ac, value);
values[chan] = value;
if (writemask != 0xF && !is_tess_factor) {
ac_build_buffer_store_dword(&ctx->ac, buffer, value, 1,
addr, base,
4 * chan, 1, 0, true, false);
}
/* Write tess factors into VGPRs for the epilog. */
if (is_tess_factor &&
ctx->shader->selector->tcs_info.tessfactors_are_def_in_all_invocs) {
if (!is_tess_inner) {
LLVMBuildStore(ctx->ac.builder, value, /* outer */
ctx->invoc0_tess_factors[chan]);
} else if (chan < 2) {
LLVMBuildStore(ctx->ac.builder, value, /* inner */
ctx->invoc0_tess_factors[4 + chan]);
}
}
}
if (writemask == 0xF && !is_tess_factor) {
LLVMValueRef value = lp_build_gather_values(&ctx->gallivm,
values, 4);
ac_build_buffer_store_dword(&ctx->ac, buffer, value, 4, addr,
base, 0, 1, 0, true, false);
}
}
LLVMValueRef si_llvm_load_input_gs(struct ac_shader_abi *abi,
unsigned input_index,
unsigned vtx_offset_param,
LLVMTypeRef type,
unsigned swizzle)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct lp_build_tgsi_context *bld_base = &ctx->bld_base;
struct si_shader *shader = ctx->shader;
struct lp_build_context *uint = &ctx->bld_base.uint_bld;
LLVMValueRef vtx_offset, soffset;
struct tgsi_shader_info *info = &shader->selector->info;
unsigned semantic_name = info->input_semantic_name[input_index];
unsigned semantic_index = info->input_semantic_index[input_index];
unsigned param;
LLVMValueRef value;
param = si_shader_io_get_unique_index(semantic_name, semantic_index);
/* GFX9 has the ESGS ring in LDS. */
if (ctx->screen->info.chip_class >= GFX9) {
unsigned index = vtx_offset_param;
switch (index / 2) {
case 0:
vtx_offset = unpack_param(ctx, ctx->param_gs_vtx01_offset,
index % 2 ? 16 : 0, 16);
break;
case 1:
vtx_offset = unpack_param(ctx, ctx->param_gs_vtx23_offset,
index % 2 ? 16 : 0, 16);
break;
case 2:
vtx_offset = unpack_param(ctx, ctx->param_gs_vtx45_offset,
index % 2 ? 16 : 0, 16);
break;
default:
assert(0);
return NULL;
}
vtx_offset = LLVMBuildAdd(ctx->ac.builder, vtx_offset,
LLVMConstInt(ctx->i32, param * 4, 0), "");
return lds_load(bld_base, type, swizzle, vtx_offset);
}
/* GFX6: input load from the ESGS ring in memory. */
if (swizzle == ~0) {
LLVMValueRef values[TGSI_NUM_CHANNELS];
unsigned chan;
for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
values[chan] = si_llvm_load_input_gs(abi, input_index, vtx_offset_param,
type, chan);
}
return lp_build_gather_values(&ctx->gallivm, values,
TGSI_NUM_CHANNELS);
}
/* Get the vertex offset parameter on GFX6. */
LLVMValueRef gs_vtx_offset = ctx->gs_vtx_offset[vtx_offset_param];
vtx_offset = lp_build_mul_imm(uint, gs_vtx_offset, 4);
soffset = LLVMConstInt(ctx->i32, (param * 4 + swizzle) * 256, 0);
value = ac_build_buffer_load(&ctx->ac, ctx->esgs_ring, 1, ctx->i32_0,
vtx_offset, soffset, 0, 1, 0, true, false);
if (llvm_type_is_64bit(ctx, type)) {
LLVMValueRef value2;
soffset = LLVMConstInt(ctx->i32, (param * 4 + swizzle + 1) * 256, 0);
value2 = ac_build_buffer_load(&ctx->ac, ctx->esgs_ring, 1,
ctx->i32_0, vtx_offset, soffset,
0, 1, 0, true, false);
return si_llvm_emit_fetch_64bit(bld_base, type, value, value2);
}
return LLVMBuildBitCast(ctx->ac.builder, value, type, "");
}
static LLVMValueRef fetch_input_gs(
struct lp_build_tgsi_context *bld_base,
const struct tgsi_full_src_register *reg,
enum tgsi_opcode_type type,
unsigned swizzle)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
struct tgsi_shader_info *info = &ctx->shader->selector->info;
unsigned semantic_name = info->input_semantic_name[reg->Register.Index];
if (swizzle != ~0 && semantic_name == TGSI_SEMANTIC_PRIMID)
return get_primitive_id(ctx, swizzle);
if (!reg->Register.Dimension)
return NULL;
return si_llvm_load_input_gs(&ctx->abi, reg->Register.Index,
reg->Dimension.Index,
tgsi2llvmtype(bld_base, type),
swizzle);
}
static int lookup_interp_param_index(unsigned interpolate, unsigned location)
{
switch (interpolate) {
case TGSI_INTERPOLATE_CONSTANT:
return 0;
case TGSI_INTERPOLATE_LINEAR:
if (location == TGSI_INTERPOLATE_LOC_SAMPLE)
return SI_PARAM_LINEAR_SAMPLE;
else if (location == TGSI_INTERPOLATE_LOC_CENTROID)
return SI_PARAM_LINEAR_CENTROID;
else
return SI_PARAM_LINEAR_CENTER;
break;
case TGSI_INTERPOLATE_COLOR:
case TGSI_INTERPOLATE_PERSPECTIVE:
if (location == TGSI_INTERPOLATE_LOC_SAMPLE)
return SI_PARAM_PERSP_SAMPLE;
else if (location == TGSI_INTERPOLATE_LOC_CENTROID)
return SI_PARAM_PERSP_CENTROID;
else
return SI_PARAM_PERSP_CENTER;
break;
default:
fprintf(stderr, "Warning: Unhandled interpolation mode.\n");
return -1;
}
}
static LLVMValueRef si_build_fs_interp(struct si_shader_context *ctx,
unsigned attr_index, unsigned chan,
LLVMValueRef prim_mask,
LLVMValueRef i, LLVMValueRef j)
{
if (i || j) {
return ac_build_fs_interp(&ctx->ac,
LLVMConstInt(ctx->i32, chan, 0),
LLVMConstInt(ctx->i32, attr_index, 0),
prim_mask, i, j);
}
return ac_build_fs_interp_mov(&ctx->ac,
LLVMConstInt(ctx->i32, 2, 0), /* P0 */
LLVMConstInt(ctx->i32, chan, 0),
LLVMConstInt(ctx->i32, attr_index, 0),
prim_mask);
}
/**
* Interpolate a fragment shader input.
*
* @param ctx context
* @param input_index index of the input in hardware
* @param semantic_name TGSI_SEMANTIC_*
* @param semantic_index semantic index
* @param num_interp_inputs number of all interpolated inputs (= BCOLOR offset)
* @param colors_read_mask color components read (4 bits for each color, 8 bits in total)
* @param interp_param interpolation weights (i,j)
* @param prim_mask SI_PARAM_PRIM_MASK
* @param face SI_PARAM_FRONT_FACE
* @param result the return value (4 components)
*/
static void interp_fs_input(struct si_shader_context *ctx,
unsigned input_index,
unsigned semantic_name,
unsigned semantic_index,
unsigned num_interp_inputs,
unsigned colors_read_mask,
LLVMValueRef interp_param,
LLVMValueRef prim_mask,
LLVMValueRef face,
LLVMValueRef result[4])
{
LLVMValueRef i = NULL, j = NULL;
unsigned chan;
/* fs.constant returns the param from the middle vertex, so it's not
* really useful for flat shading. It's meant to be used for custom
* interpolation (but the intrinsic can't fetch from the other two
* vertices).
*
* Luckily, it doesn't matter, because we rely on the FLAT_SHADE state
* to do the right thing. The only reason we use fs.constant is that
* fs.interp cannot be used on integers, because they can be equal
* to NaN.
*
* When interp is false we will use fs.constant or for newer llvm,
* amdgcn.interp.mov.
*/
bool interp = interp_param != NULL;
if (interp) {
interp_param = LLVMBuildBitCast(ctx->ac.builder, interp_param,
LLVMVectorType(ctx->f32, 2), "");
i = LLVMBuildExtractElement(ctx->ac.builder, interp_param,
ctx->i32_0, "");
j = LLVMBuildExtractElement(ctx->ac.builder, interp_param,
ctx->i32_1, "");
}
if (semantic_name == TGSI_SEMANTIC_COLOR &&
ctx->shader->key.part.ps.prolog.color_two_side) {
LLVMValueRef is_face_positive;
/* If BCOLOR0 is used, BCOLOR1 is at offset "num_inputs + 1",
* otherwise it's at offset "num_inputs".
*/
unsigned back_attr_offset = num_interp_inputs;
if (semantic_index == 1 && colors_read_mask & 0xf)
back_attr_offset += 1;
is_face_positive = LLVMBuildICmp(ctx->ac.builder, LLVMIntNE,
face, ctx->i32_0, "");
for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
LLVMValueRef front, back;
front = si_build_fs_interp(ctx,
input_index, chan,
prim_mask, i, j);
back = si_build_fs_interp(ctx,
back_attr_offset, chan,
prim_mask, i, j);
result[chan] = LLVMBuildSelect(ctx->ac.builder,
is_face_positive,
front,
back,
"");
}
} else if (semantic_name == TGSI_SEMANTIC_FOG) {
result[0] = si_build_fs_interp(ctx, input_index,
0, prim_mask, i, j);
result[1] =
result[2] = LLVMConstReal(ctx->f32, 0.0f);
result[3] = LLVMConstReal(ctx->f32, 1.0f);
} else {
for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
result[chan] = si_build_fs_interp(ctx,
input_index, chan,
prim_mask, i, j);
}
}
}
void si_llvm_load_input_fs(
struct si_shader_context *ctx,
unsigned input_index,
LLVMValueRef out[4])
{
struct lp_build_context *base = &ctx->bld_base.base;
struct si_shader *shader = ctx->shader;
struct tgsi_shader_info *info = &shader->selector->info;
LLVMValueRef main_fn = ctx->main_fn;
LLVMValueRef interp_param = NULL;
int interp_param_idx;
enum tgsi_semantic semantic_name = info->input_semantic_name[input_index];
unsigned semantic_index = info->input_semantic_index[input_index];
enum tgsi_interpolate_mode interp_mode = info->input_interpolate[input_index];
enum tgsi_interpolate_loc interp_loc = info->input_interpolate_loc[input_index];
/* Get colors from input VGPRs (set by the prolog). */
if (semantic_name == TGSI_SEMANTIC_COLOR) {
unsigned colors_read = shader->selector->info.colors_read;
unsigned mask = colors_read >> (semantic_index * 4);
unsigned offset = SI_PARAM_POS_FIXED_PT + 1 +
(semantic_index ? util_bitcount(colors_read & 0xf) : 0);
out[0] = mask & 0x1 ? LLVMGetParam(main_fn, offset++) : base->undef;
out[1] = mask & 0x2 ? LLVMGetParam(main_fn, offset++) : base->undef;
out[2] = mask & 0x4 ? LLVMGetParam(main_fn, offset++) : base->undef;
out[3] = mask & 0x8 ? LLVMGetParam(main_fn, offset++) : base->undef;
return;
}
interp_param_idx = lookup_interp_param_index(interp_mode, interp_loc);
if (interp_param_idx == -1)
return;
else if (interp_param_idx) {
interp_param = LLVMGetParam(ctx->main_fn, interp_param_idx);
}
interp_fs_input(ctx, input_index, semantic_name,
semantic_index, 0, /* this param is unused */
shader->selector->info.colors_read, interp_param,
LLVMGetParam(main_fn, SI_PARAM_PRIM_MASK),
LLVMGetParam(main_fn, SI_PARAM_FRONT_FACE),
&out[0]);
}
static void declare_input_fs(
struct si_shader_context *ctx,
unsigned input_index,
const struct tgsi_full_declaration *decl,
LLVMValueRef out[4])
{
si_llvm_load_input_fs(ctx, input_index, out);
}
static LLVMValueRef get_sample_id(struct si_shader_context *ctx)
{
return unpack_param(ctx, SI_PARAM_ANCILLARY, 8, 4);
}
/**
* Load a dword from a constant buffer.
*/
static LLVMValueRef buffer_load_const(struct si_shader_context *ctx,
LLVMValueRef resource,
LLVMValueRef offset)
{
return ac_build_buffer_load(&ctx->ac, resource, 1, NULL, offset, NULL,
0, 0, 0, true, true);
}
static LLVMValueRef load_sample_position(struct si_shader_context *ctx, LLVMValueRef sample_id)
{
struct lp_build_context *uint_bld = &ctx->bld_base.uint_bld;
LLVMValueRef desc = LLVMGetParam(ctx->main_fn, ctx->param_rw_buffers);
LLVMValueRef buf_index = LLVMConstInt(ctx->i32, SI_PS_CONST_SAMPLE_POSITIONS, 0);
LLVMValueRef resource = ac_build_load_to_sgpr(&ctx->ac, desc, buf_index);
/* offset = sample_id * 8 (8 = 2 floats containing samplepos.xy) */
LLVMValueRef offset0 = lp_build_mul_imm(uint_bld, sample_id, 8);
LLVMValueRef offset1 = LLVMBuildAdd(ctx->ac.builder, offset0, LLVMConstInt(ctx->i32, 4, 0), "");
LLVMValueRef pos[4] = {
buffer_load_const(ctx, resource, offset0),
buffer_load_const(ctx, resource, offset1),
LLVMConstReal(ctx->f32, 0),
LLVMConstReal(ctx->f32, 0)
};
return lp_build_gather_values(&ctx->gallivm, pos, 4);
}
static LLVMValueRef si_load_tess_coord(struct ac_shader_abi *abi,
LLVMTypeRef type,
unsigned num_components)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct lp_build_context *bld = &ctx->bld_base.base;
LLVMValueRef coord[4] = {
LLVMGetParam(ctx->main_fn, ctx->param_tes_u),
LLVMGetParam(ctx->main_fn, ctx->param_tes_v),
ctx->ac.f32_0,
ctx->ac.f32_0
};
/* For triangles, the vector should be (u, v, 1-u-v). */
if (ctx->shader->selector->info.properties[TGSI_PROPERTY_TES_PRIM_MODE] ==
PIPE_PRIM_TRIANGLES)
coord[2] = lp_build_sub(bld, ctx->ac.f32_1,
lp_build_add(bld, coord[0], coord[1]));
return lp_build_gather_values(&ctx->gallivm, coord, 4);
}
static LLVMValueRef load_tess_level(struct si_shader_context *ctx,
unsigned semantic_name)
{
LLVMValueRef buffer, base, addr;
int param = si_shader_io_get_unique_index_patch(semantic_name, 0);
buffer = desc_from_addr_base64k(ctx, ctx->param_tcs_offchip_addr_base64k);
base = LLVMGetParam(ctx->main_fn, ctx->param_tcs_offchip_offset);
addr = get_tcs_tes_buffer_address(ctx, get_rel_patch_id(ctx), NULL,
LLVMConstInt(ctx->i32, param, 0));
return buffer_load(&ctx->bld_base, ctx->f32,
~0, buffer, base, addr, true);
}
static LLVMValueRef si_load_tess_level(struct ac_shader_abi *abi,
unsigned varying_id)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
unsigned semantic_name;
switch (varying_id) {
case VARYING_SLOT_TESS_LEVEL_INNER:
semantic_name = TGSI_SEMANTIC_TESSINNER;
break;
case VARYING_SLOT_TESS_LEVEL_OUTER:
semantic_name = TGSI_SEMANTIC_TESSOUTER;
break;
default:
unreachable("unknown tess level");
}
return load_tess_level(ctx, semantic_name);
}
static LLVMValueRef si_load_patch_vertices_in(struct ac_shader_abi *abi)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
if (ctx->type == PIPE_SHADER_TESS_CTRL)
return unpack_param(ctx, ctx->param_tcs_out_lds_layout, 26, 6);
else if (ctx->type == PIPE_SHADER_TESS_EVAL)
return get_num_tcs_out_vertices(ctx);
else
unreachable("invalid shader stage for TGSI_SEMANTIC_VERTICESIN");
}
void si_load_system_value(struct si_shader_context *ctx,
unsigned index,
const struct tgsi_full_declaration *decl)
{
LLVMValueRef value = 0;
assert(index < RADEON_LLVM_MAX_SYSTEM_VALUES);
switch (decl->Semantic.Name) {
case TGSI_SEMANTIC_INSTANCEID:
value = ctx->abi.instance_id;
break;
case TGSI_SEMANTIC_VERTEXID:
value = LLVMBuildAdd(ctx->ac.builder,
ctx->abi.vertex_id,
ctx->abi.base_vertex, "");
break;
case TGSI_SEMANTIC_VERTEXID_NOBASE:
/* Unused. Clarify the meaning in indexed vs. non-indexed
* draws if this is ever used again. */
assert(false);
break;
case TGSI_SEMANTIC_BASEVERTEX:
{
/* For non-indexed draws, the base vertex set by the driver
* (for direct draws) or the CP (for indirect draws) is the
* first vertex ID, but GLSL expects 0 to be returned.
*/
LLVMValueRef vs_state = LLVMGetParam(ctx->main_fn, ctx->param_vs_state_bits);
LLVMValueRef indexed;
indexed = LLVMBuildLShr(ctx->ac.builder, vs_state, ctx->i32_1, "");
indexed = LLVMBuildTrunc(ctx->ac.builder, indexed, ctx->i1, "");
value = LLVMBuildSelect(ctx->ac.builder, indexed,
ctx->abi.base_vertex, ctx->i32_0, "");
break;
}
case TGSI_SEMANTIC_BASEINSTANCE:
value = ctx->abi.start_instance;
break;
case TGSI_SEMANTIC_DRAWID:
value = ctx->abi.draw_id;
break;
case TGSI_SEMANTIC_INVOCATIONID:
if (ctx->type == PIPE_SHADER_TESS_CTRL)
value = unpack_llvm_param(ctx, ctx->abi.tcs_rel_ids, 8, 5);
else if (ctx->type == PIPE_SHADER_GEOMETRY)
value = ctx->abi.gs_invocation_id;
else
assert(!"INVOCATIONID not implemented");
break;
case TGSI_SEMANTIC_POSITION:
{
LLVMValueRef pos[4] = {
LLVMGetParam(ctx->main_fn, SI_PARAM_POS_X_FLOAT),
LLVMGetParam(ctx->main_fn, SI_PARAM_POS_Y_FLOAT),
LLVMGetParam(ctx->main_fn, SI_PARAM_POS_Z_FLOAT),
lp_build_emit_llvm_unary(&ctx->bld_base, TGSI_OPCODE_RCP,
LLVMGetParam(ctx->main_fn,
SI_PARAM_POS_W_FLOAT)),
};
value = lp_build_gather_values(&ctx->gallivm, pos, 4);
break;
}
case TGSI_SEMANTIC_FACE:
value = ctx->abi.front_face;
break;
case TGSI_SEMANTIC_SAMPLEID:
value = get_sample_id(ctx);
break;
case TGSI_SEMANTIC_SAMPLEPOS: {
LLVMValueRef pos[4] = {
LLVMGetParam(ctx->main_fn, SI_PARAM_POS_X_FLOAT),
LLVMGetParam(ctx->main_fn, SI_PARAM_POS_Y_FLOAT),
LLVMConstReal(ctx->f32, 0),
LLVMConstReal(ctx->f32, 0)
};
pos[0] = lp_build_emit_llvm_unary(&ctx->bld_base,
TGSI_OPCODE_FRC, pos[0]);
pos[1] = lp_build_emit_llvm_unary(&ctx->bld_base,
TGSI_OPCODE_FRC, pos[1]);
value = lp_build_gather_values(&ctx->gallivm, pos, 4);
break;
}
case TGSI_SEMANTIC_SAMPLEMASK:
/* This can only occur with the OpenGL Core profile, which
* doesn't support smoothing.
*/
value = LLVMGetParam(ctx->main_fn, SI_PARAM_SAMPLE_COVERAGE);
break;
case TGSI_SEMANTIC_TESSCOORD:
value = si_load_tess_coord(&ctx->abi, NULL, 4);
break;
case TGSI_SEMANTIC_VERTICESIN:
value = si_load_patch_vertices_in(&ctx->abi);
break;
case TGSI_SEMANTIC_TESSINNER:
case TGSI_SEMANTIC_TESSOUTER:
value = load_tess_level(ctx, decl->Semantic.Name);
break;
case TGSI_SEMANTIC_DEFAULT_TESSOUTER_SI:
case TGSI_SEMANTIC_DEFAULT_TESSINNER_SI:
{
LLVMValueRef buf, slot, val[4];
int i, offset;
slot = LLVMConstInt(ctx->i32, SI_HS_CONST_DEFAULT_TESS_LEVELS, 0);
buf = LLVMGetParam(ctx->main_fn, ctx->param_rw_buffers);
buf = ac_build_load_to_sgpr(&ctx->ac, buf, slot);
offset = decl->Semantic.Name == TGSI_SEMANTIC_DEFAULT_TESSINNER_SI ? 4 : 0;
for (i = 0; i < 4; i++)
val[i] = buffer_load_const(ctx, buf,
LLVMConstInt(ctx->i32, (offset + i) * 4, 0));
value = lp_build_gather_values(&ctx->gallivm, val, 4);
break;
}
case TGSI_SEMANTIC_PRIMID:
value = get_primitive_id(ctx, 0);
break;
case TGSI_SEMANTIC_GRID_SIZE:
value = LLVMGetParam(ctx->main_fn, ctx->param_grid_size);
break;
case TGSI_SEMANTIC_BLOCK_SIZE:
{
LLVMValueRef values[3];
unsigned i;
unsigned *properties = ctx->shader->selector->info.properties;
if (properties[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH] != 0) {
unsigned sizes[3] = {
properties[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH],
properties[TGSI_PROPERTY_CS_FIXED_BLOCK_HEIGHT],
properties[TGSI_PROPERTY_CS_FIXED_BLOCK_DEPTH]
};
for (i = 0; i < 3; ++i)
values[i] = LLVMConstInt(ctx->i32, sizes[i], 0);
value = lp_build_gather_values(&ctx->gallivm, values, 3);
} else {
value = LLVMGetParam(ctx->main_fn, ctx->param_block_size);
}
break;
}
case TGSI_SEMANTIC_BLOCK_ID:
{
LLVMValueRef values[3];
for (int i = 0; i < 3; i++) {
values[i] = ctx->i32_0;
if (ctx->param_block_id[i] >= 0) {
values[i] = LLVMGetParam(ctx->main_fn,
ctx->param_block_id[i]);
}
}
value = lp_build_gather_values(&ctx->gallivm, values, 3);
break;
}
case TGSI_SEMANTIC_THREAD_ID:
value = LLVMGetParam(ctx->main_fn, ctx->param_thread_id);
break;
case TGSI_SEMANTIC_HELPER_INVOCATION:
value = lp_build_intrinsic(ctx->ac.builder,
"llvm.amdgcn.ps.live",
ctx->i1, NULL, 0,
LP_FUNC_ATTR_READNONE);
value = LLVMBuildNot(ctx->ac.builder, value, "");
value = LLVMBuildSExt(ctx->ac.builder, value, ctx->i32, "");
break;
case TGSI_SEMANTIC_SUBGROUP_SIZE:
value = LLVMConstInt(ctx->i32, 64, 0);
break;
case TGSI_SEMANTIC_SUBGROUP_INVOCATION:
value = ac_get_thread_id(&ctx->ac);
break;
case TGSI_SEMANTIC_SUBGROUP_EQ_MASK:
{
LLVMValueRef id = ac_get_thread_id(&ctx->ac);
id = LLVMBuildZExt(ctx->ac.builder, id, ctx->i64, "");
value = LLVMBuildShl(ctx->ac.builder, LLVMConstInt(ctx->i64, 1, 0), id, "");
value = LLVMBuildBitCast(ctx->ac.builder, value, ctx->v2i32, "");
break;
}
case TGSI_SEMANTIC_SUBGROUP_GE_MASK:
case TGSI_SEMANTIC_SUBGROUP_GT_MASK:
case TGSI_SEMANTIC_SUBGROUP_LE_MASK:
case TGSI_SEMANTIC_SUBGROUP_LT_MASK:
{
LLVMValueRef id = ac_get_thread_id(&ctx->ac);
if (decl->Semantic.Name == TGSI_SEMANTIC_SUBGROUP_GT_MASK ||
decl->Semantic.Name == TGSI_SEMANTIC_SUBGROUP_LE_MASK) {
/* All bits set except LSB */
value = LLVMConstInt(ctx->i64, -2, 0);
} else {
/* All bits set */
value = LLVMConstInt(ctx->i64, -1, 0);
}
id = LLVMBuildZExt(ctx->ac.builder, id, ctx->i64, "");
value = LLVMBuildShl(ctx->ac.builder, value, id, "");
if (decl->Semantic.Name == TGSI_SEMANTIC_SUBGROUP_LE_MASK ||
decl->Semantic.Name == TGSI_SEMANTIC_SUBGROUP_LT_MASK)
value = LLVMBuildNot(ctx->ac.builder, value, "");
value = LLVMBuildBitCast(ctx->ac.builder, value, ctx->v2i32, "");
break;
}
default:
assert(!"unknown system value");
return;
}
ctx->system_values[index] = value;
}
void si_declare_compute_memory(struct si_shader_context *ctx,
const struct tgsi_full_declaration *decl)
{
struct si_shader_selector *sel = ctx->shader->selector;
LLVMTypeRef i8p = LLVMPointerType(ctx->i8, LOCAL_ADDR_SPACE);
LLVMValueRef var;
assert(decl->Declaration.MemType == TGSI_MEMORY_TYPE_SHARED);
assert(decl->Range.First == decl->Range.Last);
assert(!ctx->ac.lds);
var = LLVMAddGlobalInAddressSpace(ctx->ac.module,
LLVMArrayType(ctx->i8, sel->local_size),
"compute_lds",
LOCAL_ADDR_SPACE);
LLVMSetAlignment(var, 4);
ctx->ac.lds = LLVMBuildBitCast(ctx->ac.builder, var, i8p, "");
}
static LLVMValueRef load_const_buffer_desc(struct si_shader_context *ctx, int i)
{
LLVMValueRef list_ptr = LLVMGetParam(ctx->main_fn,
ctx->param_const_and_shader_buffers);
return ac_build_load_to_sgpr(&ctx->ac, list_ptr,
LLVMConstInt(ctx->i32, si_get_constbuf_slot(i), 0));
}
static LLVMValueRef load_ubo(struct ac_shader_abi *abi, LLVMValueRef index)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
LLVMValueRef ptr = LLVMGetParam(ctx->main_fn, ctx->param_const_and_shader_buffers);
index = si_llvm_bound_index(ctx, index, ctx->num_const_buffers);
index = LLVMBuildAdd(ctx->ac.builder, index,
LLVMConstInt(ctx->i32, SI_NUM_SHADER_BUFFERS, 0), "");
return ac_build_load_to_sgpr(&ctx->ac, ptr, index);
}
static LLVMValueRef
load_ssbo(struct ac_shader_abi *abi, LLVMValueRef index, bool write)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
LLVMValueRef rsrc_ptr = LLVMGetParam(ctx->main_fn,
ctx->param_const_and_shader_buffers);
index = si_llvm_bound_index(ctx, index, ctx->num_shader_buffers);
index = LLVMBuildSub(ctx->ac.builder,
LLVMConstInt(ctx->i32, SI_NUM_SHADER_BUFFERS - 1, 0),
index, "");
return ac_build_load_to_sgpr(&ctx->ac, rsrc_ptr, index);
}
static LLVMValueRef fetch_constant(
struct lp_build_tgsi_context *bld_base,
const struct tgsi_full_src_register *reg,
enum tgsi_opcode_type type,
unsigned swizzle)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
struct si_shader_selector *sel = ctx->shader->selector;
const struct tgsi_ind_register *ireg = &reg->Indirect;
unsigned buf, idx;
LLVMValueRef addr, bufp;
if (swizzle == LP_CHAN_ALL) {
unsigned chan;
LLVMValueRef values[4];
for (chan = 0; chan < TGSI_NUM_CHANNELS; ++chan)
values[chan] = fetch_constant(bld_base, reg, type, chan);
return lp_build_gather_values(&ctx->gallivm, values, 4);
}
/* Split 64-bit loads. */
if (tgsi_type_is_64bit(type)) {
LLVMValueRef lo, hi;
lo = fetch_constant(bld_base, reg, TGSI_TYPE_UNSIGNED, swizzle);
hi = fetch_constant(bld_base, reg, TGSI_TYPE_UNSIGNED, swizzle + 1);
return si_llvm_emit_fetch_64bit(bld_base, tgsi2llvmtype(bld_base, type),
lo, hi);
}
idx = reg->Register.Index * 4 + swizzle;
if (reg->Register.Indirect) {
addr = si_get_indirect_index(ctx, ireg, 16, idx * 4);
} else {
addr = LLVMConstInt(ctx->i32, idx * 4, 0);
}
/* Fast path when user data SGPRs point to constant buffer 0 directly. */
if (sel->info.const_buffers_declared == 1 &&
sel->info.shader_buffers_declared == 0) {
LLVMValueRef ptr =
LLVMGetParam(ctx->main_fn, ctx->param_const_and_shader_buffers);
/* This enables use of s_load_dword and flat_load_dword for const buffer 0
* loads, and up to x4 load opcode merging. However, it leads to horrible
* code reducing SIMD wave occupancy from 8 to 2 in many cases.
*
* Using s_buffer_load_dword (x1) seems to be the best option right now.
*
* LLVM 5.0 on SI doesn't insert a required s_nop between SALU setting
* a descriptor and s_buffer_load_dword using it, so we can't expand
* the pointer into a full descriptor like below. We have to use
* s_load_dword instead. The only case when LLVM 5.0 would select
* s_buffer_load_dword (that we have to prevent) is when we use use
* a literal offset where we don't need bounds checking.
*/
if (ctx->screen->info.chip_class == SI &&
HAVE_LLVM < 0x0600 &&
!reg->Register.Indirect) {
addr = LLVMBuildLShr(ctx->ac.builder, addr, LLVMConstInt(ctx->i32, 2, 0), "");
LLVMValueRef result = ac_build_load_invariant(&ctx->ac, ptr, addr);
return bitcast(bld_base, type, result);
}
/* Do the bounds checking with a descriptor, because
* doing computation and manual bounds checking of 64-bit
* addresses generates horrible VALU code with very high
* VGPR usage and very low SIMD occupancy.
*/
ptr = LLVMBuildPtrToInt(ctx->ac.builder, ptr, ctx->i64, "");
ptr = LLVMBuildBitCast(ctx->ac.builder, ptr, ctx->v2i32, "");
LLVMValueRef desc_elems[] = {
LLVMBuildExtractElement(ctx->ac.builder, ptr, ctx->i32_0, ""),
LLVMBuildExtractElement(ctx->ac.builder, ptr, ctx->i32_1, ""),
LLVMConstInt(ctx->i32, (sel->info.const_file_max[0] + 1) * 16, 0),
LLVMConstInt(ctx->i32,
S_008F0C_DST_SEL_X(V_008F0C_SQ_SEL_X) |
S_008F0C_DST_SEL_Y(V_008F0C_SQ_SEL_Y) |
S_008F0C_DST_SEL_Z(V_008F0C_SQ_SEL_Z) |
S_008F0C_DST_SEL_W(V_008F0C_SQ_SEL_W) |
S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) |
S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32), 0)
};
LLVMValueRef desc = ac_build_gather_values(&ctx->ac, desc_elems, 4);
LLVMValueRef result = buffer_load_const(ctx, desc, addr);
return bitcast(bld_base, type, result);
}
assert(reg->Register.Dimension);
buf = reg->Dimension.Index;
if (reg->Dimension.Indirect) {
LLVMValueRef ptr = LLVMGetParam(ctx->main_fn, ctx->param_const_and_shader_buffers);
LLVMValueRef index;
index = si_get_bounded_indirect_index(ctx, &reg->DimIndirect,
reg->Dimension.Index,
ctx->num_const_buffers);
index = LLVMBuildAdd(ctx->ac.builder, index,
LLVMConstInt(ctx->i32, SI_NUM_SHADER_BUFFERS, 0), "");
bufp = ac_build_load_to_sgpr(&ctx->ac, ptr, index);
} else
bufp = load_const_buffer_desc(ctx, buf);
return bitcast(bld_base, type, buffer_load_const(ctx, bufp, addr));
}
/* Upper 16 bits must be zero. */
static LLVMValueRef si_llvm_pack_two_int16(struct si_shader_context *ctx,
LLVMValueRef val[2])
{
return LLVMBuildOr(ctx->ac.builder, val[0],
LLVMBuildShl(ctx->ac.builder, val[1],
LLVMConstInt(ctx->i32, 16, 0),
""), "");
}
/* Upper 16 bits are ignored and will be dropped. */
static LLVMValueRef si_llvm_pack_two_int32_as_int16(struct si_shader_context *ctx,
LLVMValueRef val[2])
{
LLVMValueRef v[2] = {
LLVMBuildAnd(ctx->ac.builder, val[0],
LLVMConstInt(ctx->i32, 0xffff, 0), ""),
val[1],
};
return si_llvm_pack_two_int16(ctx, v);
}
/* Initialize arguments for the shader export intrinsic */
static void si_llvm_init_export_args(struct si_shader_context *ctx,
LLVMValueRef *values,
unsigned target,
struct ac_export_args *args)
{
LLVMValueRef f32undef = LLVMGetUndef(ctx->ac.f32);
LLVMBuilderRef builder = ctx->ac.builder;
LLVMValueRef val[4];
unsigned spi_shader_col_format = V_028714_SPI_SHADER_32_ABGR;
unsigned chan;
bool is_int8, is_int10;
/* Default is 0xf. Adjusted below depending on the format. */
args->enabled_channels = 0xf; /* writemask */
/* Specify whether the EXEC mask represents the valid mask */
args->valid_mask = 0;
/* Specify whether this is the last export */
args->done = 0;
/* Specify the target we are exporting */
args->target = target;
if (ctx->type == PIPE_SHADER_FRAGMENT) {
const struct si_shader_key *key = &ctx->shader->key;
unsigned col_formats = key->part.ps.epilog.spi_shader_col_format;
int cbuf = target - V_008DFC_SQ_EXP_MRT;
assert(cbuf >= 0 && cbuf < 8);
spi_shader_col_format = (col_formats >> (cbuf * 4)) & 0xf;
is_int8 = (key->part.ps.epilog.color_is_int8 >> cbuf) & 0x1;
is_int10 = (key->part.ps.epilog.color_is_int10 >> cbuf) & 0x1;
}
args->compr = false;
args->out[0] = f32undef;
args->out[1] = f32undef;
args->out[2] = f32undef;
args->out[3] = f32undef;
switch (spi_shader_col_format) {
case V_028714_SPI_SHADER_ZERO:
args->enabled_channels = 0; /* writemask */
args->target = V_008DFC_SQ_EXP_NULL;
break;
case V_028714_SPI_SHADER_32_R:
args->enabled_channels = 1; /* writemask */
args->out[0] = values[0];
break;
case V_028714_SPI_SHADER_32_GR:
args->enabled_channels = 0x3; /* writemask */
args->out[0] = values[0];
args->out[1] = values[1];
break;
case V_028714_SPI_SHADER_32_AR:
args->enabled_channels = 0x9; /* writemask */
args->out[0] = values[0];
args->out[3] = values[3];
break;
case V_028714_SPI_SHADER_FP16_ABGR:
args->compr = 1; /* COMPR flag */
for (chan = 0; chan < 2; chan++) {
LLVMValueRef pack_args[2] = {
values[2 * chan],
values[2 * chan + 1]
};
LLVMValueRef packed;
packed = ac_build_cvt_pkrtz_f16(&ctx->ac, pack_args);
args->out[chan] = ac_to_float(&ctx->ac, packed);
}
break;
case V_028714_SPI_SHADER_UNORM16_ABGR:
for (chan = 0; chan < 4; chan++) {
val[chan] = ac_build_clamp(&ctx->ac, values[chan]);
val[chan] = LLVMBuildFMul(builder, val[chan],
LLVMConstReal(ctx->f32, 65535), "");
val[chan] = LLVMBuildFAdd(builder, val[chan],
LLVMConstReal(ctx->f32, 0.5), "");
val[chan] = LLVMBuildFPToUI(builder, val[chan],
ctx->i32, "");
}
args->compr = 1; /* COMPR flag */
args->out[0] = ac_to_float(&ctx->ac, si_llvm_pack_two_int16(ctx, val));
args->out[1] = ac_to_float(&ctx->ac, si_llvm_pack_two_int16(ctx, val+2));
break;
case V_028714_SPI_SHADER_SNORM16_ABGR:
for (chan = 0; chan < 4; chan++) {
/* Clamp between [-1, 1]. */
val[chan] = lp_build_emit_llvm_binary(&ctx->bld_base, TGSI_OPCODE_MIN,
values[chan],
LLVMConstReal(ctx->f32, 1));
val[chan] = lp_build_emit_llvm_binary(&ctx->bld_base, TGSI_OPCODE_MAX,
val[chan],
LLVMConstReal(ctx->f32, -1));
/* Convert to a signed integer in [-32767, 32767]. */
val[chan] = LLVMBuildFMul(builder, val[chan],
LLVMConstReal(ctx->f32, 32767), "");
/* If positive, add 0.5, else add -0.5. */
val[chan] = LLVMBuildFAdd(builder, val[chan],
LLVMBuildSelect(builder,
LLVMBuildFCmp(builder, LLVMRealOGE,
val[chan], ctx->ac.f32_0, ""),
LLVMConstReal(ctx->f32, 0.5),
LLVMConstReal(ctx->f32, -0.5), ""), "");
val[chan] = LLVMBuildFPToSI(builder, val[chan], ctx->i32, "");
}
args->compr = 1; /* COMPR flag */
args->out[0] = ac_to_float(&ctx->ac, si_llvm_pack_two_int32_as_int16(ctx, val));
args->out[1] = ac_to_float(&ctx->ac, si_llvm_pack_two_int32_as_int16(ctx, val+2));
break;
case V_028714_SPI_SHADER_UINT16_ABGR: {
LLVMValueRef max_rgb = LLVMConstInt(ctx->i32,
is_int8 ? 255 : is_int10 ? 1023 : 65535, 0);
LLVMValueRef max_alpha =
!is_int10 ? max_rgb : LLVMConstInt(ctx->i32, 3, 0);
/* Clamp. */
for (chan = 0; chan < 4; chan++) {
val[chan] = ac_to_integer(&ctx->ac, values[chan]);
val[chan] = lp_build_emit_llvm_binary(&ctx->bld_base, TGSI_OPCODE_UMIN,
val[chan],
chan == 3 ? max_alpha : max_rgb);
}
args->compr = 1; /* COMPR flag */
args->out[0] = ac_to_float(&ctx->ac, si_llvm_pack_two_int16(ctx, val));
args->out[1] = ac_to_float(&ctx->ac, si_llvm_pack_two_int16(ctx, val+2));
break;
}
case V_028714_SPI_SHADER_SINT16_ABGR: {
LLVMValueRef max_rgb = LLVMConstInt(ctx->i32,
is_int8 ? 127 : is_int10 ? 511 : 32767, 0);
LLVMValueRef min_rgb = LLVMConstInt(ctx->i32,
is_int8 ? -128 : is_int10 ? -512 : -32768, 0);
LLVMValueRef max_alpha =
!is_int10 ? max_rgb : ctx->i32_1;
LLVMValueRef min_alpha =
!is_int10 ? min_rgb : LLVMConstInt(ctx->i32, -2, 0);
/* Clamp. */
for (chan = 0; chan < 4; chan++) {
val[chan] = ac_to_integer(&ctx->ac, values[chan]);
val[chan] = lp_build_emit_llvm_binary(&ctx->bld_base,
TGSI_OPCODE_IMIN,
val[chan], chan == 3 ? max_alpha : max_rgb);
val[chan] = lp_build_emit_llvm_binary(&ctx->bld_base,
TGSI_OPCODE_IMAX,
val[chan], chan == 3 ? min_alpha : min_rgb);
}
args->compr = 1; /* COMPR flag */
args->out[0] = ac_to_float(&ctx->ac, si_llvm_pack_two_int32_as_int16(ctx, val));
args->out[1] = ac_to_float(&ctx->ac, si_llvm_pack_two_int32_as_int16(ctx, val+2));
break;
}
case V_028714_SPI_SHADER_32_ABGR:
memcpy(&args->out[0], values, sizeof(values[0]) * 4);
break;
}
}
static void si_alpha_test(struct lp_build_tgsi_context *bld_base,
LLVMValueRef alpha)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
if (ctx->shader->key.part.ps.epilog.alpha_func != PIPE_FUNC_NEVER) {
static LLVMRealPredicate cond_map[PIPE_FUNC_ALWAYS + 1] = {
[PIPE_FUNC_LESS] = LLVMRealOLT,
[PIPE_FUNC_EQUAL] = LLVMRealOEQ,
[PIPE_FUNC_LEQUAL] = LLVMRealOLE,
[PIPE_FUNC_GREATER] = LLVMRealOGT,
[PIPE_FUNC_NOTEQUAL] = LLVMRealONE,
[PIPE_FUNC_GEQUAL] = LLVMRealOGE,
};
LLVMRealPredicate cond = cond_map[ctx->shader->key.part.ps.epilog.alpha_func];
assert(cond);
LLVMValueRef alpha_ref = LLVMGetParam(ctx->main_fn,
SI_PARAM_ALPHA_REF);
LLVMValueRef alpha_pass =
LLVMBuildFCmp(ctx->ac.builder, cond, alpha, alpha_ref, "");
ac_build_kill_if_false(&ctx->ac, alpha_pass);
} else {
ac_build_kill_if_false(&ctx->ac, LLVMConstInt(ctx->i1, 0, 0));
}
}
static LLVMValueRef si_scale_alpha_by_sample_mask(struct lp_build_tgsi_context *bld_base,
LLVMValueRef alpha,
unsigned samplemask_param)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef coverage;
/* alpha = alpha * popcount(coverage) / SI_NUM_SMOOTH_AA_SAMPLES */
coverage = LLVMGetParam(ctx->main_fn,
samplemask_param);
coverage = ac_to_integer(&ctx->ac, coverage);
coverage = lp_build_intrinsic(ctx->ac.builder, "llvm.ctpop.i32",
ctx->i32,
&coverage, 1, LP_FUNC_ATTR_READNONE);
coverage = LLVMBuildUIToFP(ctx->ac.builder, coverage,
ctx->f32, "");
coverage = LLVMBuildFMul(ctx->ac.builder, coverage,
LLVMConstReal(ctx->f32,
1.0 / SI_NUM_SMOOTH_AA_SAMPLES), "");
return LLVMBuildFMul(ctx->ac.builder, alpha, coverage, "");
}
static void si_llvm_emit_clipvertex(struct si_shader_context *ctx,
struct ac_export_args *pos, LLVMValueRef *out_elts)
{
unsigned reg_index;
unsigned chan;
unsigned const_chan;
LLVMValueRef base_elt;
LLVMValueRef ptr = LLVMGetParam(ctx->main_fn, ctx->param_rw_buffers);
LLVMValueRef constbuf_index = LLVMConstInt(ctx->i32,
SI_VS_CONST_CLIP_PLANES, 0);
LLVMValueRef const_resource = ac_build_load_to_sgpr(&ctx->ac, ptr, constbuf_index);
for (reg_index = 0; reg_index < 2; reg_index ++) {
struct ac_export_args *args = &pos[2 + reg_index];
args->out[0] =
args->out[1] =
args->out[2] =
args->out[3] = LLVMConstReal(ctx->f32, 0.0f);
/* Compute dot products of position and user clip plane vectors */
for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
for (const_chan = 0; const_chan < TGSI_NUM_CHANNELS; const_chan++) {
LLVMValueRef addr =
LLVMConstInt(ctx->i32, ((reg_index * 4 + chan) * 4 +
const_chan) * 4, 0);
base_elt = buffer_load_const(ctx, const_resource,
addr);
args->out[chan] =
lp_build_add(&ctx->bld_base.base, args->out[chan],
lp_build_mul(&ctx->bld_base.base, base_elt,
out_elts[const_chan]));
}
}
args->enabled_channels = 0xf;
args->valid_mask = 0;
args->done = 0;
args->target = V_008DFC_SQ_EXP_POS + 2 + reg_index;
args->compr = 0;
}
}
static void si_dump_streamout(struct pipe_stream_output_info *so)
{
unsigned i;
if (so->num_outputs)
fprintf(stderr, "STREAMOUT\n");
for (i = 0; i < so->num_outputs; i++) {
unsigned mask = ((1 << so->output[i].num_components) - 1) <<
so->output[i].start_component;
fprintf(stderr, " %i: BUF%i[%i..%i] <- OUT[%i].%s%s%s%s\n",
i, so->output[i].output_buffer,
so->output[i].dst_offset, so->output[i].dst_offset + so->output[i].num_components - 1,
so->output[i].register_index,
mask & 1 ? "x" : "",
mask & 2 ? "y" : "",
mask & 4 ? "z" : "",
mask & 8 ? "w" : "");
}
}
static void emit_streamout_output(struct si_shader_context *ctx,
LLVMValueRef const *so_buffers,
LLVMValueRef const *so_write_offsets,
struct pipe_stream_output *stream_out,
struct si_shader_output_values *shader_out)
{
unsigned buf_idx = stream_out->output_buffer;
unsigned start = stream_out->start_component;
unsigned num_comps = stream_out->num_components;
LLVMValueRef out[4];
assert(num_comps && num_comps <= 4);
if (!num_comps || num_comps > 4)
return;
/* Load the output as int. */
for (int j = 0; j < num_comps; j++) {
assert(stream_out->stream == shader_out->vertex_stream[start + j]);
out[j] = ac_to_integer(&ctx->ac, shader_out->values[start + j]);
}
/* Pack the output. */
LLVMValueRef vdata = NULL;
switch (num_comps) {
case 1: /* as i32 */
vdata = out[0];
break;
case 2: /* as v2i32 */
case 3: /* as v4i32 (aligned to 4) */
case 4: /* as v4i32 */
vdata = LLVMGetUndef(LLVMVectorType(ctx->i32, util_next_power_of_two(num_comps)));
for (int j = 0; j < num_comps; j++) {
vdata = LLVMBuildInsertElement(ctx->ac.builder, vdata, out[j],
LLVMConstInt(ctx->i32, j, 0), "");
}
break;
}
ac_build_buffer_store_dword(&ctx->ac, so_buffers[buf_idx],
vdata, num_comps,
so_write_offsets[buf_idx],
ctx->i32_0,
stream_out->dst_offset * 4, 1, 1, true, false);
}
/**
* Write streamout data to buffers for vertex stream @p stream (different
* vertex streams can occur for GS copy shaders).
*/
static void si_llvm_emit_streamout(struct si_shader_context *ctx,
struct si_shader_output_values *outputs,
unsigned noutput, unsigned stream)
{
struct si_shader_selector *sel = ctx->shader->selector;
struct pipe_stream_output_info *so = &sel->so;
LLVMBuilderRef builder = ctx->ac.builder;
int i;
struct lp_build_if_state if_ctx;
/* Get bits [22:16], i.e. (so_param >> 16) & 127; */
LLVMValueRef so_vtx_count =
unpack_param(ctx, ctx->param_streamout_config, 16, 7);
LLVMValueRef tid = ac_get_thread_id(&ctx->ac);
/* can_emit = tid < so_vtx_count; */
LLVMValueRef can_emit =
LLVMBuildICmp(builder, LLVMIntULT, tid, so_vtx_count, "");
/* Emit the streamout code conditionally. This actually avoids
* out-of-bounds buffer access. The hw tells us via the SGPR
* (so_vtx_count) which threads are allowed to emit streamout data. */
lp_build_if(&if_ctx, &ctx->gallivm, can_emit);
{
/* The buffer offset is computed as follows:
* ByteOffset = streamout_offset[buffer_id]*4 +
* (streamout_write_index + thread_id)*stride[buffer_id] +
* attrib_offset
*/
LLVMValueRef so_write_index =
LLVMGetParam(ctx->main_fn,
ctx->param_streamout_write_index);
/* Compute (streamout_write_index + thread_id). */
so_write_index = LLVMBuildAdd(builder, so_write_index, tid, "");
/* Load the descriptor and compute the write offset for each
* enabled buffer. */
LLVMValueRef so_write_offset[4] = {};
LLVMValueRef so_buffers[4];
LLVMValueRef buf_ptr = LLVMGetParam(ctx->main_fn,
ctx->param_rw_buffers);
for (i = 0; i < 4; i++) {
if (!so->stride[i])
continue;
LLVMValueRef offset = LLVMConstInt(ctx->i32,
SI_VS_STREAMOUT_BUF0 + i, 0);
so_buffers[i] = ac_build_load_to_sgpr(&ctx->ac, buf_ptr, offset);
LLVMValueRef so_offset = LLVMGetParam(ctx->main_fn,
ctx->param_streamout_offset[i]);
so_offset = LLVMBuildMul(builder, so_offset, LLVMConstInt(ctx->i32, 4, 0), "");
so_write_offset[i] = LLVMBuildMul(builder, so_write_index,
LLVMConstInt(ctx->i32, so->stride[i]*4, 0), "");
so_write_offset[i] = LLVMBuildAdd(builder, so_write_offset[i], so_offset, "");
}
/* Write streamout data. */
for (i = 0; i < so->num_outputs; i++) {
unsigned reg = so->output[i].register_index;
if (reg >= noutput)
continue;
if (stream != so->output[i].stream)
continue;
emit_streamout_output(ctx, so_buffers, so_write_offset,
&so->output[i], &outputs[reg]);
}
}
lp_build_endif(&if_ctx);
}
static void si_export_param(struct si_shader_context *ctx, unsigned index,
LLVMValueRef *values)
{
struct ac_export_args args;
si_llvm_init_export_args(ctx, values,
V_008DFC_SQ_EXP_PARAM + index, &args);
ac_build_export(&ctx->ac, &args);
}
static void si_build_param_exports(struct si_shader_context *ctx,
struct si_shader_output_values *outputs,
unsigned noutput)
{
struct si_shader *shader = ctx->shader;
unsigned param_count = 0;
for (unsigned i = 0; i < noutput; i++) {
unsigned semantic_name = outputs[i].semantic_name;
unsigned semantic_index = outputs[i].semantic_index;
if (outputs[i].vertex_stream[0] != 0 &&
outputs[i].vertex_stream[1] != 0 &&
outputs[i].vertex_stream[2] != 0 &&
outputs[i].vertex_stream[3] != 0)
continue;
switch (semantic_name) {
case TGSI_SEMANTIC_LAYER:
case TGSI_SEMANTIC_VIEWPORT_INDEX:
case TGSI_SEMANTIC_CLIPDIST:
case TGSI_SEMANTIC_COLOR:
case TGSI_SEMANTIC_BCOLOR:
case TGSI_SEMANTIC_PRIMID:
case TGSI_SEMANTIC_FOG:
case TGSI_SEMANTIC_TEXCOORD:
case TGSI_SEMANTIC_GENERIC:
break;
default:
continue;
}
if ((semantic_name != TGSI_SEMANTIC_GENERIC ||
semantic_index < SI_MAX_IO_GENERIC) &&
shader->key.opt.kill_outputs &
(1ull << si_shader_io_get_unique_index(semantic_name, semantic_index)))
continue;
si_export_param(ctx, param_count, outputs[i].values);
assert(i < ARRAY_SIZE(shader->info.vs_output_param_offset));
shader->info.vs_output_param_offset[i] = param_count++;
}
shader->info.nr_param_exports = param_count;
}
/* Generate export instructions for hardware VS shader stage */
static void si_llvm_export_vs(struct si_shader_context *ctx,
struct si_shader_output_values *outputs,
unsigned noutput)
{
struct si_shader *shader = ctx->shader;
struct ac_export_args pos_args[4] = {};
LLVMValueRef psize_value = NULL, edgeflag_value = NULL, layer_value = NULL, viewport_index_value = NULL;
unsigned pos_idx;
int i;
/* Build position exports. */
for (i = 0; i < noutput; i++) {
switch (outputs[i].semantic_name) {
case TGSI_SEMANTIC_POSITION:
si_llvm_init_export_args(ctx, outputs[i].values,
V_008DFC_SQ_EXP_POS, &pos_args[0]);
break;
case TGSI_SEMANTIC_PSIZE:
psize_value = outputs[i].values[0];
break;
case TGSI_SEMANTIC_LAYER:
layer_value = outputs[i].values[0];
break;
case TGSI_SEMANTIC_VIEWPORT_INDEX:
viewport_index_value = outputs[i].values[0];
break;
case TGSI_SEMANTIC_EDGEFLAG:
edgeflag_value = outputs[i].values[0];
break;
case TGSI_SEMANTIC_CLIPDIST:
if (!shader->key.opt.clip_disable) {
unsigned index = 2 + outputs[i].semantic_index;
si_llvm_init_export_args(ctx, outputs[i].values,
V_008DFC_SQ_EXP_POS + index,
&pos_args[index]);
}
break;
case TGSI_SEMANTIC_CLIPVERTEX:
if (!shader->key.opt.clip_disable) {
si_llvm_emit_clipvertex(ctx, pos_args,
outputs[i].values);
}
break;
}
}
/* We need to add the position output manually if it's missing. */
if (!pos_args[0].out[0]) {
pos_args[0].enabled_channels = 0xf; /* writemask */
pos_args[0].valid_mask = 0; /* EXEC mask */
pos_args[0].done = 0; /* last export? */
pos_args[0].target = V_008DFC_SQ_EXP_POS;
pos_args[0].compr = 0; /* COMPR flag */
pos_args[0].out[0] = ctx->ac.f32_0; /* X */
pos_args[0].out[1] = ctx->ac.f32_0; /* Y */
pos_args[0].out[2] = ctx->ac.f32_0; /* Z */
pos_args[0].out[3] = ctx->ac.f32_1; /* W */
}
/* Write the misc vector (point size, edgeflag, layer, viewport). */
if (shader->selector->info.writes_psize ||
shader->selector->info.writes_edgeflag ||
shader->selector->info.writes_viewport_index ||
shader->selector->info.writes_layer) {
pos_args[1].enabled_channels = shader->selector->info.writes_psize |
(shader->selector->info.writes_edgeflag << 1) |
(shader->selector->info.writes_layer << 2);
pos_args[1].valid_mask = 0; /* EXEC mask */
pos_args[1].done = 0; /* last export? */
pos_args[1].target = V_008DFC_SQ_EXP_POS + 1;
pos_args[1].compr = 0; /* COMPR flag */
pos_args[1].out[0] = ctx->ac.f32_0; /* X */
pos_args[1].out[1] = ctx->ac.f32_0; /* Y */
pos_args[1].out[2] = ctx->ac.f32_0; /* Z */
pos_args[1].out[3] = ctx->ac.f32_0; /* W */
if (shader->selector->info.writes_psize)
pos_args[1].out[0] = psize_value;
if (shader->selector->info.writes_edgeflag) {
/* The output is a float, but the hw expects an integer
* with the first bit containing the edge flag. */
edgeflag_value = LLVMBuildFPToUI(ctx->ac.builder,
edgeflag_value,
ctx->i32, "");
edgeflag_value = ac_build_umin(&ctx->ac,
edgeflag_value,
ctx->i32_1);
/* The LLVM intrinsic expects a float. */
pos_args[1].out[1] = ac_to_float(&ctx->ac, edgeflag_value);
}
if (ctx->screen->info.chip_class >= GFX9) {
/* GFX9 has the layer in out.z[10:0] and the viewport
* index in out.z[19:16].
*/
if (shader->selector->info.writes_layer)
pos_args[1].out[2] = layer_value;
if (shader->selector->info.writes_viewport_index) {
LLVMValueRef v = viewport_index_value;
v = ac_to_integer(&ctx->ac, v);
v = LLVMBuildShl(ctx->ac.builder, v,
LLVMConstInt(ctx->i32, 16, 0), "");
v = LLVMBuildOr(ctx->ac.builder, v,
ac_to_integer(&ctx->ac, pos_args[1].out[2]), "");
pos_args[1].out[2] = ac_to_float(&ctx->ac, v);
pos_args[1].enabled_channels |= 1 << 2;
}
} else {
if (shader->selector->info.writes_layer)
pos_args[1].out[2] = layer_value;
if (shader->selector->info.writes_viewport_index) {
pos_args[1].out[3] = viewport_index_value;
pos_args[1].enabled_channels |= 1 << 3;
}
}
}
for (i = 0; i < 4; i++)
if (pos_args[i].out[0])
shader->info.nr_pos_exports++;
pos_idx = 0;
for (i = 0; i < 4; i++) {
if (!pos_args[i].out[0])
continue;
/* Specify the target we are exporting */
pos_args[i].target = V_008DFC_SQ_EXP_POS + pos_idx++;
if (pos_idx == shader->info.nr_pos_exports)
/* Specify that this is the last export */
pos_args[i].done = 1;
ac_build_export(&ctx->ac, &pos_args[i]);
}
/* Build parameter exports. */
si_build_param_exports(ctx, outputs, noutput);
}
/**
* Forward all outputs from the vertex shader to the TES. This is only used
* for the fixed function TCS.
*/
static void si_copy_tcs_inputs(struct lp_build_tgsi_context *bld_base)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef invocation_id, buffer, buffer_offset;
LLVMValueRef lds_vertex_stride, lds_vertex_offset, lds_base;
uint64_t inputs;
invocation_id = unpack_llvm_param(ctx, ctx->abi.tcs_rel_ids, 8, 5);
buffer = desc_from_addr_base64k(ctx, ctx->param_tcs_offchip_addr_base64k);
buffer_offset = LLVMGetParam(ctx->main_fn, ctx->param_tcs_offchip_offset);
lds_vertex_stride = get_tcs_in_vertex_dw_stride(ctx);
lds_vertex_offset = LLVMBuildMul(ctx->ac.builder, invocation_id,
lds_vertex_stride, "");
lds_base = get_tcs_in_current_patch_offset(ctx);
lds_base = LLVMBuildAdd(ctx->ac.builder, lds_base, lds_vertex_offset, "");
inputs = ctx->shader->key.mono.u.ff_tcs_inputs_to_copy;
while (inputs) {
unsigned i = u_bit_scan64(&inputs);
LLVMValueRef lds_ptr = LLVMBuildAdd(ctx->ac.builder, lds_base,
LLVMConstInt(ctx->i32, 4 * i, 0),
"");
LLVMValueRef buffer_addr = get_tcs_tes_buffer_address(ctx,
get_rel_patch_id(ctx),
invocation_id,
LLVMConstInt(ctx->i32, i, 0));
LLVMValueRef value = lds_load(bld_base, ctx->ac.i32, ~0,
lds_ptr);
ac_build_buffer_store_dword(&ctx->ac, buffer, value, 4, buffer_addr,
buffer_offset, 0, 1, 0, true, false);
}
}
static void si_write_tess_factors(struct lp_build_tgsi_context *bld_base,
LLVMValueRef rel_patch_id,
LLVMValueRef invocation_id,
LLVMValueRef tcs_out_current_patch_data_offset,
LLVMValueRef invoc0_tf_outer[4],
LLVMValueRef invoc0_tf_inner[2])
{
struct si_shader_context *ctx = si_shader_context(bld_base);
struct si_shader *shader = ctx->shader;
unsigned tess_inner_index, tess_outer_index;
LLVMValueRef lds_base, lds_inner, lds_outer, byteoffset, buffer;
LLVMValueRef out[6], vec0, vec1, tf_base, inner[4], outer[4];
unsigned stride, outer_comps, inner_comps, i, offset;
struct lp_build_if_state if_ctx, inner_if_ctx;
/* Add a barrier before loading tess factors from LDS. */
if (!shader->key.part.tcs.epilog.invoc0_tess_factors_are_def)
si_llvm_emit_barrier(NULL, bld_base, NULL);
/* Do this only for invocation 0, because the tess levels are per-patch,
* not per-vertex.
*
* This can't jump, because invocation 0 executes this. It should
* at least mask out the loads and stores for other invocations.
*/
lp_build_if(&if_ctx, &ctx->gallivm,
LLVMBuildICmp(ctx->ac.builder, LLVMIntEQ,
invocation_id, ctx->i32_0, ""));
/* Determine the layout of one tess factor element in the buffer. */
switch (shader->key.part.tcs.epilog.prim_mode) {
case PIPE_PRIM_LINES:
stride = 2; /* 2 dwords, 1 vec2 store */
outer_comps = 2;
inner_comps = 0;
break;
case PIPE_PRIM_TRIANGLES:
stride = 4; /* 4 dwords, 1 vec4 store */
outer_comps = 3;
inner_comps = 1;
break;
case PIPE_PRIM_QUADS:
stride = 6; /* 6 dwords, 2 stores (vec4 + vec2) */
outer_comps = 4;
inner_comps = 2;
break;
default:
assert(0);
return;
}
for (i = 0; i < 4; i++) {
inner[i] = LLVMGetUndef(ctx->i32);
outer[i] = LLVMGetUndef(ctx->i32);
}
if (shader->key.part.tcs.epilog.invoc0_tess_factors_are_def) {
/* Tess factors are in VGPRs. */
for (i = 0; i < outer_comps; i++)
outer[i] = out[i] = invoc0_tf_outer[i];
for (i = 0; i < inner_comps; i++)
inner[i] = out[outer_comps+i] = invoc0_tf_inner[i];
} else {
/* Load tess_inner and tess_outer from LDS.
* Any invocation can write them, so we can't get them from a temporary.
*/
tess_inner_index = si_shader_io_get_unique_index_patch(TGSI_SEMANTIC_TESSINNER, 0);
tess_outer_index = si_shader_io_get_unique_index_patch(TGSI_SEMANTIC_TESSOUTER, 0);
lds_base = tcs_out_current_patch_data_offset;
lds_inner = LLVMBuildAdd(ctx->ac.builder, lds_base,
LLVMConstInt(ctx->i32,
tess_inner_index * 4, 0), "");
lds_outer = LLVMBuildAdd(ctx->ac.builder, lds_base,
LLVMConstInt(ctx->i32,
tess_outer_index * 4, 0), "");
for (i = 0; i < outer_comps; i++) {
outer[i] = out[i] =
lds_load(bld_base, ctx->ac.i32, i, lds_outer);
}
for (i = 0; i < inner_comps; i++) {
inner[i] = out[outer_comps+i] =
lds_load(bld_base, ctx->ac.i32, i, lds_inner);
}
}
if (shader->key.part.tcs.epilog.prim_mode == PIPE_PRIM_LINES) {
/* For isolines, the hardware expects tess factors in the
* reverse order from what GLSL / TGSI specify.
*/
LLVMValueRef tmp = out[0];
out[0] = out[1];
out[1] = tmp;
}
/* Convert the outputs to vectors for stores. */
vec0 = lp_build_gather_values(&ctx->gallivm, out, MIN2(stride, 4));
vec1 = NULL;
if (stride > 4)
vec1 = lp_build_gather_values(&ctx->gallivm, out+4, stride - 4);
/* Get the buffer. */
buffer = desc_from_addr_base64k(ctx, ctx->param_tcs_factor_addr_base64k);
/* Get the offset. */
tf_base = LLVMGetParam(ctx->main_fn,
ctx->param_tcs_factor_offset);
byteoffset = LLVMBuildMul(ctx->ac.builder, rel_patch_id,
LLVMConstInt(ctx->i32, 4 * stride, 0), "");
lp_build_if(&inner_if_ctx, &ctx->gallivm,
LLVMBuildICmp(ctx->ac.builder, LLVMIntEQ,
rel_patch_id, ctx->i32_0, ""));
/* Store the dynamic HS control word. */
offset = 0;
if (ctx->screen->info.chip_class <= VI) {
ac_build_buffer_store_dword(&ctx->ac, buffer,
LLVMConstInt(ctx->i32, 0x80000000, 0),
1, ctx->i32_0, tf_base,
offset, 1, 0, true, false);
offset += 4;
}
lp_build_endif(&inner_if_ctx);
/* Store the tessellation factors. */
ac_build_buffer_store_dword(&ctx->ac, buffer, vec0,
MIN2(stride, 4), byteoffset, tf_base,
offset, 1, 0, true, false);
offset += 16;
if (vec1)
ac_build_buffer_store_dword(&ctx->ac, buffer, vec1,
stride - 4, byteoffset, tf_base,
offset, 1, 0, true, false);
/* Store the tess factors into the offchip buffer if TES reads them. */
if (shader->key.part.tcs.epilog.tes_reads_tess_factors) {
LLVMValueRef buf, base, inner_vec, outer_vec, tf_outer_offset;
LLVMValueRef tf_inner_offset;
unsigned param_outer, param_inner;
buf = desc_from_addr_base64k(ctx, ctx->param_tcs_offchip_addr_base64k);
base = LLVMGetParam(ctx->main_fn, ctx->param_tcs_offchip_offset);
param_outer = si_shader_io_get_unique_index_patch(
TGSI_SEMANTIC_TESSOUTER, 0);
tf_outer_offset = get_tcs_tes_buffer_address(ctx, rel_patch_id, NULL,
LLVMConstInt(ctx->i32, param_outer, 0));
outer_vec = lp_build_gather_values(&ctx->gallivm, outer,
util_next_power_of_two(outer_comps));
ac_build_buffer_store_dword(&ctx->ac, buf, outer_vec,
outer_comps, tf_outer_offset,
base, 0, 1, 0, true, false);
if (inner_comps) {
param_inner = si_shader_io_get_unique_index_patch(
TGSI_SEMANTIC_TESSINNER, 0);
tf_inner_offset = get_tcs_tes_buffer_address(ctx, rel_patch_id, NULL,
LLVMConstInt(ctx->i32, param_inner, 0));
inner_vec = inner_comps == 1 ? inner[0] :
lp_build_gather_values(&ctx->gallivm, inner, inner_comps);
ac_build_buffer_store_dword(&ctx->ac, buf, inner_vec,
inner_comps, tf_inner_offset,
base, 0, 1, 0, true, false);
}
}
lp_build_endif(&if_ctx);
}
static LLVMValueRef
si_insert_input_ret(struct si_shader_context *ctx, LLVMValueRef ret,
unsigned param, unsigned return_index)
{
return LLVMBuildInsertValue(ctx->ac.builder, ret,
LLVMGetParam(ctx->main_fn, param),
return_index, "");
}
static LLVMValueRef
si_insert_input_ret_float(struct si_shader_context *ctx, LLVMValueRef ret,
unsigned param, unsigned return_index)
{
LLVMBuilderRef builder = ctx->ac.builder;
LLVMValueRef p = LLVMGetParam(ctx->main_fn, param);
return LLVMBuildInsertValue(builder, ret,
ac_to_float(&ctx->ac, p),
return_index, "");
}
static LLVMValueRef
si_insert_input_ptr_as_2xi32(struct si_shader_context *ctx, LLVMValueRef ret,
unsigned param, unsigned return_index)
{
LLVMBuilderRef builder = ctx->ac.builder;
LLVMValueRef ptr, lo, hi;
ptr = LLVMGetParam(ctx->main_fn, param);
ptr = LLVMBuildPtrToInt(builder, ptr, ctx->i64, "");
ptr = LLVMBuildBitCast(builder, ptr, ctx->v2i32, "");
lo = LLVMBuildExtractElement(builder, ptr, ctx->i32_0, "");
hi = LLVMBuildExtractElement(builder, ptr, ctx->i32_1, "");
ret = LLVMBuildInsertValue(builder, ret, lo, return_index, "");
return LLVMBuildInsertValue(builder, ret, hi, return_index + 1, "");
}
/* This only writes the tessellation factor levels. */
static void si_llvm_emit_tcs_epilogue(struct ac_shader_abi *abi,
unsigned max_outputs,
LLVMValueRef *addrs)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct lp_build_tgsi_context *bld_base = &ctx->bld_base;
LLVMBuilderRef builder = ctx->ac.builder;
LLVMValueRef rel_patch_id, invocation_id, tf_lds_offset;
si_copy_tcs_inputs(bld_base);
rel_patch_id = get_rel_patch_id(ctx);
invocation_id = unpack_llvm_param(ctx, ctx->abi.tcs_rel_ids, 8, 5);
tf_lds_offset = get_tcs_out_current_patch_data_offset(ctx);
if (ctx->screen->info.chip_class >= GFX9) {
LLVMBasicBlockRef blocks[2] = {
LLVMGetInsertBlock(builder),
ctx->merged_wrap_if_state.entry_block
};
LLVMValueRef values[2];
lp_build_endif(&ctx->merged_wrap_if_state);
values[0] = rel_patch_id;
values[1] = LLVMGetUndef(ctx->i32);
rel_patch_id = ac_build_phi(&ctx->ac, ctx->i32, 2, values, blocks);
values[0] = tf_lds_offset;
values[1] = LLVMGetUndef(ctx->i32);
tf_lds_offset = ac_build_phi(&ctx->ac, ctx->i32, 2, values, blocks);
values[0] = invocation_id;
values[1] = ctx->i32_1; /* cause the epilog to skip threads */
invocation_id = ac_build_phi(&ctx->ac, ctx->i32, 2, values, blocks);
}
/* Return epilog parameters from this function. */
LLVMValueRef ret = ctx->return_value;
unsigned vgpr;
if (ctx->screen->info.chip_class >= GFX9) {
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_offchip_layout,
8 + GFX9_SGPR_TCS_OFFCHIP_LAYOUT);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_offchip_addr_base64k,
8 + GFX9_SGPR_TCS_OFFCHIP_ADDR_BASE64K);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_factor_addr_base64k,
8 + GFX9_SGPR_TCS_FACTOR_ADDR_BASE64K);
/* Tess offchip and tess factor offsets are at the beginning. */
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_offchip_offset, 2);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_factor_offset, 4);
vgpr = 8 + GFX9_SGPR_TCS_FACTOR_ADDR_BASE64K + 1;
} else {
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_offchip_layout,
GFX6_SGPR_TCS_OFFCHIP_LAYOUT);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_offchip_addr_base64k,
GFX6_SGPR_TCS_OFFCHIP_ADDR_BASE64K);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_factor_addr_base64k,
GFX6_SGPR_TCS_FACTOR_ADDR_BASE64K);
/* Tess offchip and tess factor offsets are after user SGPRs. */
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_offchip_offset,
GFX6_TCS_NUM_USER_SGPR);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_factor_offset,
GFX6_TCS_NUM_USER_SGPR + 1);
vgpr = GFX6_TCS_NUM_USER_SGPR + 2;
}
/* VGPRs */
rel_patch_id = ac_to_float(&ctx->ac, rel_patch_id);
invocation_id = ac_to_float(&ctx->ac, invocation_id);
tf_lds_offset = ac_to_float(&ctx->ac, tf_lds_offset);
/* Leave a hole corresponding to the two input VGPRs. This ensures that
* the invocation_id output does not alias the tcs_rel_ids input,
* which saves a V_MOV on gfx9.
*/
vgpr += 2;
ret = LLVMBuildInsertValue(builder, ret, rel_patch_id, vgpr++, "");
ret = LLVMBuildInsertValue(builder, ret, invocation_id, vgpr++, "");
if (ctx->shader->selector->tcs_info.tessfactors_are_def_in_all_invocs) {
vgpr++; /* skip the tess factor LDS offset */
for (unsigned i = 0; i < 6; i++) {
LLVMValueRef value =
LLVMBuildLoad(builder, ctx->invoc0_tess_factors[i], "");
value = ac_to_float(&ctx->ac, value);
ret = LLVMBuildInsertValue(builder, ret, value, vgpr++, "");
}
} else {
ret = LLVMBuildInsertValue(builder, ret, tf_lds_offset, vgpr++, "");
}
ctx->return_value = ret;
}
/* Pass TCS inputs from LS to TCS on GFX9. */
static void si_set_ls_return_value_for_tcs(struct si_shader_context *ctx)
{
LLVMValueRef ret = ctx->return_value;
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_offchip_offset, 2);
ret = si_insert_input_ret(ctx, ret, ctx->param_merged_wave_info, 3);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_factor_offset, 4);
ret = si_insert_input_ret(ctx, ret, ctx->param_merged_scratch_offset, 5);
ret = si_insert_input_ptr_as_2xi32(ctx, ret, ctx->param_rw_buffers,
8 + SI_SGPR_RW_BUFFERS);
ret = si_insert_input_ptr_as_2xi32(ctx, ret,
ctx->param_bindless_samplers_and_images,
8 + SI_SGPR_BINDLESS_SAMPLERS_AND_IMAGES);
ret = si_insert_input_ret(ctx, ret, ctx->param_vs_state_bits,
8 + SI_SGPR_VS_STATE_BITS);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_offchip_layout,
8 + GFX9_SGPR_TCS_OFFCHIP_LAYOUT);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_out_lds_offsets,
8 + GFX9_SGPR_TCS_OUT_OFFSETS);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_out_lds_layout,
8 + GFX9_SGPR_TCS_OUT_LAYOUT);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_offchip_addr_base64k,
8 + GFX9_SGPR_TCS_OFFCHIP_ADDR_BASE64K);
ret = si_insert_input_ret(ctx, ret, ctx->param_tcs_factor_addr_base64k,
8 + GFX9_SGPR_TCS_FACTOR_ADDR_BASE64K);
unsigned desc_param = ctx->param_tcs_factor_addr_base64k + 2;
ret = si_insert_input_ptr_as_2xi32(ctx, ret, desc_param,
8 + GFX9_SGPR_TCS_CONST_AND_SHADER_BUFFERS);
ret = si_insert_input_ptr_as_2xi32(ctx, ret, desc_param + 1,
8 + GFX9_SGPR_TCS_SAMPLERS_AND_IMAGES);
unsigned vgpr = 8 + GFX9_TCS_NUM_USER_SGPR;
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
ac_to_float(&ctx->ac, ctx->abi.tcs_patch_id),
vgpr++, "");
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
ac_to_float(&ctx->ac, ctx->abi.tcs_rel_ids),
vgpr++, "");
ctx->return_value = ret;
}
/* Pass GS inputs from ES to GS on GFX9. */
static void si_set_es_return_value_for_gs(struct si_shader_context *ctx)
{
LLVMValueRef ret = ctx->return_value;
ret = si_insert_input_ret(ctx, ret, ctx->param_gs2vs_offset, 2);
ret = si_insert_input_ret(ctx, ret, ctx->param_merged_wave_info, 3);
ret = si_insert_input_ret(ctx, ret, ctx->param_merged_scratch_offset, 5);
ret = si_insert_input_ptr_as_2xi32(ctx, ret, ctx->param_rw_buffers,
8 + SI_SGPR_RW_BUFFERS);
ret = si_insert_input_ptr_as_2xi32(ctx, ret,
ctx->param_bindless_samplers_and_images,
8 + SI_SGPR_BINDLESS_SAMPLERS_AND_IMAGES);
unsigned desc_param = ctx->param_vs_state_bits + 1;
ret = si_insert_input_ptr_as_2xi32(ctx, ret, desc_param,
8 + GFX9_SGPR_GS_CONST_AND_SHADER_BUFFERS);
ret = si_insert_input_ptr_as_2xi32(ctx, ret, desc_param + 1,
8 + GFX9_SGPR_GS_SAMPLERS_AND_IMAGES);
unsigned vgpr = 8 + GFX9_GS_NUM_USER_SGPR;
for (unsigned i = 0; i < 5; i++) {
unsigned param = ctx->param_gs_vtx01_offset + i;
ret = si_insert_input_ret_float(ctx, ret, param, vgpr++);
}
ctx->return_value = ret;
}
static void si_llvm_emit_ls_epilogue(struct ac_shader_abi *abi,
unsigned max_outputs,
LLVMValueRef *addrs)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct si_shader *shader = ctx->shader;
struct tgsi_shader_info *info = &shader->selector->info;
unsigned i, chan;
LLVMValueRef vertex_id = LLVMGetParam(ctx->main_fn,
ctx->param_rel_auto_id);
LLVMValueRef vertex_dw_stride = get_tcs_in_vertex_dw_stride(ctx);
LLVMValueRef base_dw_addr = LLVMBuildMul(ctx->ac.builder, vertex_id,
vertex_dw_stride, "");
/* Write outputs to LDS. The next shader (TCS aka HS) will read
* its inputs from it. */
for (i = 0; i < info->num_outputs; i++) {
unsigned name = info->output_semantic_name[i];
unsigned index = info->output_semantic_index[i];
/* The ARB_shader_viewport_layer_array spec contains the
* following issue:
*
* 2) What happens if gl_ViewportIndex or gl_Layer is
* written in the vertex shader and a geometry shader is
* present?
*
* RESOLVED: The value written by the last vertex processing
* stage is used. If the last vertex processing stage
* (vertex, tessellation evaluation or geometry) does not
* statically assign to gl_ViewportIndex or gl_Layer, index
* or layer zero is assumed.
*
* So writes to those outputs in VS-as-LS are simply ignored.
*/
if (name == TGSI_SEMANTIC_LAYER ||
name == TGSI_SEMANTIC_VIEWPORT_INDEX)
continue;
int param = si_shader_io_get_unique_index(name, index);
LLVMValueRef dw_addr = LLVMBuildAdd(ctx->ac.builder, base_dw_addr,
LLVMConstInt(ctx->i32, param * 4, 0), "");
for (chan = 0; chan < 4; chan++) {
if (!(info->output_usagemask[i] & (1 << chan)))
continue;
lds_store(ctx, chan, dw_addr,
LLVMBuildLoad(ctx->ac.builder, addrs[4 * i + chan], ""));
}
}
if (ctx->screen->info.chip_class >= GFX9)
si_set_ls_return_value_for_tcs(ctx);
}
static void si_llvm_emit_es_epilogue(struct ac_shader_abi *abi,
unsigned max_outputs,
LLVMValueRef *addrs)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct si_shader *es = ctx->shader;
struct tgsi_shader_info *info = &es->selector->info;
LLVMValueRef soffset = LLVMGetParam(ctx->main_fn,
ctx->param_es2gs_offset);
LLVMValueRef lds_base = NULL;
unsigned chan;
int i;
if (ctx->screen->info.chip_class >= GFX9 && info->num_outputs) {
unsigned itemsize_dw = es->selector->esgs_itemsize / 4;
LLVMValueRef vertex_idx = ac_get_thread_id(&ctx->ac);
LLVMValueRef wave_idx = unpack_param(ctx, ctx->param_merged_wave_info, 24, 4);
vertex_idx = LLVMBuildOr(ctx->ac.builder, vertex_idx,
LLVMBuildMul(ctx->ac.builder, wave_idx,
LLVMConstInt(ctx->i32, 64, false), ""), "");
lds_base = LLVMBuildMul(ctx->ac.builder, vertex_idx,
LLVMConstInt(ctx->i32, itemsize_dw, 0), "");
}
for (i = 0; i < info->num_outputs; i++) {
int param;
if (info->output_semantic_name[i] == TGSI_SEMANTIC_VIEWPORT_INDEX ||
info->output_semantic_name[i] == TGSI_SEMANTIC_LAYER)
continue;
param = si_shader_io_get_unique_index(info->output_semantic_name[i],
info->output_semantic_index[i]);
for (chan = 0; chan < 4; chan++) {
LLVMValueRef out_val = LLVMBuildLoad(ctx->ac.builder, addrs[4 * i + chan], "");
out_val = ac_to_integer(&ctx->ac, out_val);
/* GFX9 has the ESGS ring in LDS. */
if (ctx->screen->info.chip_class >= GFX9) {
lds_store(ctx, param * 4 + chan, lds_base, out_val);
continue;
}
ac_build_buffer_store_dword(&ctx->ac,
ctx->esgs_ring,
out_val, 1, NULL, soffset,
(4 * param + chan) * 4,
1, 1, true, true);
}
}
if (ctx->screen->info.chip_class >= GFX9)
si_set_es_return_value_for_gs(ctx);
}
static LLVMValueRef si_get_gs_wave_id(struct si_shader_context *ctx)
{
if (ctx->screen->info.chip_class >= GFX9)
return unpack_param(ctx, ctx->param_merged_wave_info, 16, 8);
else
return LLVMGetParam(ctx->main_fn, ctx->param_gs_wave_id);
}
static void emit_gs_epilogue(struct si_shader_context *ctx)
{
ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_OP_NOP | AC_SENDMSG_GS_DONE,
si_get_gs_wave_id(ctx));
if (ctx->screen->info.chip_class >= GFX9)
lp_build_endif(&ctx->merged_wrap_if_state);
}
static void si_llvm_emit_gs_epilogue(struct ac_shader_abi *abi,
unsigned max_outputs,
LLVMValueRef *addrs)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct tgsi_shader_info UNUSED *info = &ctx->shader->selector->info;
assert(info->num_outputs <= max_outputs);
emit_gs_epilogue(ctx);
}
static void si_tgsi_emit_gs_epilogue(struct lp_build_tgsi_context *bld_base)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
emit_gs_epilogue(ctx);
}
static void si_llvm_emit_vs_epilogue(struct ac_shader_abi *abi,
unsigned max_outputs,
LLVMValueRef *addrs)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct tgsi_shader_info *info = &ctx->shader->selector->info;
struct si_shader_output_values *outputs = NULL;
int i,j;
assert(!ctx->shader->is_gs_copy_shader);
assert(info->num_outputs <= max_outputs);
outputs = MALLOC((info->num_outputs + 1) * sizeof(outputs[0]));
/* Vertex color clamping.
*
* This uses a state constant loaded in a user data SGPR and
* an IF statement is added that clamps all colors if the constant
* is true.
*/
if (ctx->type == PIPE_SHADER_VERTEX) {
struct lp_build_if_state if_ctx;
LLVMValueRef cond = NULL;
LLVMValueRef addr, val;
for (i = 0; i < info->num_outputs; i++) {
if (info->output_semantic_name[i] != TGSI_SEMANTIC_COLOR &&
info->output_semantic_name[i] != TGSI_SEMANTIC_BCOLOR)
continue;
/* We've found a color. */
if (!cond) {
/* The state is in the first bit of the user SGPR. */
cond = LLVMGetParam(ctx->main_fn,
ctx->param_vs_state_bits);
cond = LLVMBuildTrunc(ctx->ac.builder, cond,
ctx->i1, "");
lp_build_if(&if_ctx, &ctx->gallivm, cond);
}
for (j = 0; j < 4; j++) {
addr = addrs[4 * i + j];
val = LLVMBuildLoad(ctx->ac.builder, addr, "");
val = ac_build_clamp(&ctx->ac, val);
LLVMBuildStore(ctx->ac.builder, val, addr);
}
}
if (cond)
lp_build_endif(&if_ctx);
}
for (i = 0; i < info->num_outputs; i++) {
outputs[i].semantic_name = info->output_semantic_name[i];
outputs[i].semantic_index = info->output_semantic_index[i];
for (j = 0; j < 4; j++) {
outputs[i].values[j] =
LLVMBuildLoad(ctx->ac.builder,
addrs[4 * i + j],
"");
outputs[i].vertex_stream[j] =
(info->output_streams[i] >> (2 * j)) & 3;
}
}
if (ctx->shader->selector->so.num_outputs)
si_llvm_emit_streamout(ctx, outputs, i, 0);
/* Export PrimitiveID. */
if (ctx->shader->key.mono.u.vs_export_prim_id) {
outputs[i].semantic_name = TGSI_SEMANTIC_PRIMID;
outputs[i].semantic_index = 0;
outputs[i].values[0] = ac_to_float(&ctx->ac, get_primitive_id(ctx, 0));
for (j = 1; j < 4; j++)
outputs[i].values[j] = LLVMConstReal(ctx->f32, 0);
memset(outputs[i].vertex_stream, 0,
sizeof(outputs[i].vertex_stream));
i++;
}
si_llvm_export_vs(ctx, outputs, i);
FREE(outputs);
}
static void si_tgsi_emit_epilogue(struct lp_build_tgsi_context *bld_base)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
ctx->abi.emit_outputs(&ctx->abi, RADEON_LLVM_MAX_OUTPUTS,
&ctx->outputs[0][0]);
}
struct si_ps_exports {
unsigned num;
struct ac_export_args args[10];
};
static void si_export_mrt_z(struct lp_build_tgsi_context *bld_base,
LLVMValueRef depth, LLVMValueRef stencil,
LLVMValueRef samplemask, struct si_ps_exports *exp)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
struct ac_export_args args;
ac_export_mrt_z(&ctx->ac, depth, stencil, samplemask, &args);
memcpy(&exp->args[exp->num++], &args, sizeof(args));
}
static void si_export_mrt_color(struct lp_build_tgsi_context *bld_base,
LLVMValueRef *color, unsigned index,
unsigned samplemask_param,
bool is_last, struct si_ps_exports *exp)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
int i;
/* Clamp color */
if (ctx->shader->key.part.ps.epilog.clamp_color)
for (i = 0; i < 4; i++)
color[i] = ac_build_clamp(&ctx->ac, color[i]);
/* Alpha to one */
if (ctx->shader->key.part.ps.epilog.alpha_to_one)
color[3] = ctx->ac.f32_1;
/* Alpha test */
if (index == 0 &&
ctx->shader->key.part.ps.epilog.alpha_func != PIPE_FUNC_ALWAYS)
si_alpha_test(bld_base, color[3]);
/* Line & polygon smoothing */
if (ctx->shader->key.part.ps.epilog.poly_line_smoothing)
color[3] = si_scale_alpha_by_sample_mask(bld_base, color[3],
samplemask_param);
/* If last_cbuf > 0, FS_COLOR0_WRITES_ALL_CBUFS is true. */
if (ctx->shader->key.part.ps.epilog.last_cbuf > 0) {
struct ac_export_args args[8];
int c, last = -1;
/* Get the export arguments, also find out what the last one is. */
for (c = 0; c <= ctx->shader->key.part.ps.epilog.last_cbuf; c++) {
si_llvm_init_export_args(ctx, color,
V_008DFC_SQ_EXP_MRT + c, &args[c]);
if (args[c].enabled_channels)
last = c;
}
/* Emit all exports. */
for (c = 0; c <= ctx->shader->key.part.ps.epilog.last_cbuf; c++) {
if (is_last && last == c) {
args[c].valid_mask = 1; /* whether the EXEC mask is valid */
args[c].done = 1; /* DONE bit */
} else if (!args[c].enabled_channels)
continue; /* unnecessary NULL export */
memcpy(&exp->args[exp->num++], &args[c], sizeof(args[c]));
}
} else {
struct ac_export_args args;
/* Export */
si_llvm_init_export_args(ctx, color, V_008DFC_SQ_EXP_MRT + index,
&args);
if (is_last) {
args.valid_mask = 1; /* whether the EXEC mask is valid */
args.done = 1; /* DONE bit */
} else if (!args.enabled_channels)
return; /* unnecessary NULL export */
memcpy(&exp->args[exp->num++], &args, sizeof(args));
}
}
static void si_emit_ps_exports(struct si_shader_context *ctx,
struct si_ps_exports *exp)
{
for (unsigned i = 0; i < exp->num; i++)
ac_build_export(&ctx->ac, &exp->args[i]);
}
static void si_export_null(struct lp_build_tgsi_context *bld_base)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
struct lp_build_context *base = &bld_base->base;
struct ac_export_args args;
args.enabled_channels = 0x0; /* enabled channels */
args.valid_mask = 1; /* whether the EXEC mask is valid */
args.done = 1; /* DONE bit */
args.target = V_008DFC_SQ_EXP_NULL;
args.compr = 0; /* COMPR flag (0 = 32-bit export) */
args.out[0] = base->undef; /* R */
args.out[1] = base->undef; /* G */
args.out[2] = base->undef; /* B */
args.out[3] = base->undef; /* A */
ac_build_export(&ctx->ac, &args);
}
/**
* Return PS outputs in this order:
*
* v[0:3] = color0.xyzw
* v[4:7] = color1.xyzw
* ...
* vN+0 = Depth
* vN+1 = Stencil
* vN+2 = SampleMask
* vN+3 = SampleMaskIn (used for OpenGL smoothing)
*
* The alpha-ref SGPR is returned via its original location.
*/
static void si_llvm_return_fs_outputs(struct ac_shader_abi *abi,
unsigned max_outputs,
LLVMValueRef *addrs)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct si_shader *shader = ctx->shader;
struct tgsi_shader_info *info = &shader->selector->info;
LLVMBuilderRef builder = ctx->ac.builder;
unsigned i, j, first_vgpr, vgpr;
LLVMValueRef color[8][4] = {};
LLVMValueRef depth = NULL, stencil = NULL, samplemask = NULL;
LLVMValueRef ret;
if (ctx->postponed_kill)
ac_build_kill_if_false(&ctx->ac, LLVMBuildLoad(builder, ctx->postponed_kill, ""));
/* Read the output values. */
for (i = 0; i < info->num_outputs; i++) {
unsigned semantic_name = info->output_semantic_name[i];
unsigned semantic_index = info->output_semantic_index[i];
switch (semantic_name) {
case TGSI_SEMANTIC_COLOR:
assert(semantic_index < 8);
for (j = 0; j < 4; j++) {
LLVMValueRef ptr = addrs[4 * i + j];
LLVMValueRef result = LLVMBuildLoad(builder, ptr, "");
color[semantic_index][j] = result;
}
break;
case TGSI_SEMANTIC_POSITION:
depth = LLVMBuildLoad(builder,
addrs[4 * i + 2], "");
break;
case TGSI_SEMANTIC_STENCIL:
stencil = LLVMBuildLoad(builder,
addrs[4 * i + 1], "");
break;
case TGSI_SEMANTIC_SAMPLEMASK:
samplemask = LLVMBuildLoad(builder,
addrs[4 * i + 0], "");
break;
default:
fprintf(stderr, "Warning: SI unhandled fs output type:%d\n",
semantic_name);
}
}
/* Fill the return structure. */
ret = ctx->return_value;
/* Set SGPRs. */
ret = LLVMBuildInsertValue(builder, ret,
ac_to_integer(&ctx->ac,
LLVMGetParam(ctx->main_fn,
SI_PARAM_ALPHA_REF)),
SI_SGPR_ALPHA_REF, "");
/* Set VGPRs */
first_vgpr = vgpr = SI_SGPR_ALPHA_REF + 1;
for (i = 0; i < ARRAY_SIZE(color); i++) {
if (!color[i][0])
continue;
for (j = 0; j < 4; j++)
ret = LLVMBuildInsertValue(builder, ret, color[i][j], vgpr++, "");
}
if (depth)
ret = LLVMBuildInsertValue(builder, ret, depth, vgpr++, "");
if (stencil)
ret = LLVMBuildInsertValue(builder, ret, stencil, vgpr++, "");
if (samplemask)
ret = LLVMBuildInsertValue(builder, ret, samplemask, vgpr++, "");
/* Add the input sample mask for smoothing at the end. */
if (vgpr < first_vgpr + PS_EPILOG_SAMPLEMASK_MIN_LOC)
vgpr = first_vgpr + PS_EPILOG_SAMPLEMASK_MIN_LOC;
ret = LLVMBuildInsertValue(builder, ret,
LLVMGetParam(ctx->main_fn,
SI_PARAM_SAMPLE_COVERAGE), vgpr++, "");
ctx->return_value = ret;
}
static void membar_emit(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef src0 = lp_build_emit_fetch(bld_base, emit_data->inst, 0, 0);
unsigned flags = LLVMConstIntGetZExtValue(src0);
unsigned waitcnt = NOOP_WAITCNT;
if (flags & TGSI_MEMBAR_THREAD_GROUP)
waitcnt &= VM_CNT & LGKM_CNT;
if (flags & (TGSI_MEMBAR_ATOMIC_BUFFER |
TGSI_MEMBAR_SHADER_BUFFER |
TGSI_MEMBAR_SHADER_IMAGE))
waitcnt &= VM_CNT;
if (flags & TGSI_MEMBAR_SHARED)
waitcnt &= LGKM_CNT;
if (waitcnt != NOOP_WAITCNT)
ac_build_waitcnt(&ctx->ac, waitcnt);
}
static void clock_emit(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef tmp;
tmp = lp_build_intrinsic(ctx->ac.builder, "llvm.readcyclecounter",
ctx->i64, NULL, 0, 0);
tmp = LLVMBuildBitCast(ctx->ac.builder, tmp, ctx->v2i32, "");
emit_data->output[0] =
LLVMBuildExtractElement(ctx->ac.builder, tmp, ctx->i32_0, "");
emit_data->output[1] =
LLVMBuildExtractElement(ctx->ac.builder, tmp, ctx->i32_1, "");
}
LLVMTypeRef si_const_array(LLVMTypeRef elem_type, int num_elements)
{
return LLVMPointerType(LLVMArrayType(elem_type, num_elements),
CONST_ADDR_SPACE);
}
static void si_llvm_emit_ddxy(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
unsigned opcode = emit_data->info->opcode;
LLVMValueRef val;
int idx;
unsigned mask;
if (opcode == TGSI_OPCODE_DDX_FINE)
mask = AC_TID_MASK_LEFT;
else if (opcode == TGSI_OPCODE_DDY_FINE)
mask = AC_TID_MASK_TOP;
else
mask = AC_TID_MASK_TOP_LEFT;
/* for DDX we want to next X pixel, DDY next Y pixel. */
idx = (opcode == TGSI_OPCODE_DDX || opcode == TGSI_OPCODE_DDX_FINE) ? 1 : 2;
val = ac_to_integer(&ctx->ac, emit_data->args[0]);
val = ac_build_ddxy(&ctx->ac, mask, idx, val);
emit_data->output[emit_data->chan] = val;
}
/*
* this takes an I,J coordinate pair,
* and works out the X and Y derivatives.
* it returns DDX(I), DDX(J), DDY(I), DDY(J).
*/
static LLVMValueRef si_llvm_emit_ddxy_interp(
struct lp_build_tgsi_context *bld_base,
LLVMValueRef interp_ij)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef result[4], a;
unsigned i;
for (i = 0; i < 2; i++) {
a = LLVMBuildExtractElement(ctx->ac.builder, interp_ij,
LLVMConstInt(ctx->i32, i, 0), "");
result[i] = lp_build_emit_llvm_unary(bld_base, TGSI_OPCODE_DDX, a);
result[2+i] = lp_build_emit_llvm_unary(bld_base, TGSI_OPCODE_DDY, a);
}
return lp_build_gather_values(&ctx->gallivm, result, 4);
}
static void interp_fetch_args(
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
const struct tgsi_full_instruction *inst = emit_data->inst;
if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET) {
/* offset is in second src, first two channels */
emit_data->args[0] = lp_build_emit_fetch(bld_base,
emit_data->inst, 1,
TGSI_CHAN_X);
emit_data->args[1] = lp_build_emit_fetch(bld_base,
emit_data->inst, 1,
TGSI_CHAN_Y);
emit_data->arg_count = 2;
} else if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) {
LLVMValueRef sample_position;
LLVMValueRef sample_id;
LLVMValueRef halfval = LLVMConstReal(ctx->f32, 0.5f);
/* fetch sample ID, then fetch its sample position,
* and place into first two channels.
*/
sample_id = lp_build_emit_fetch(bld_base,
emit_data->inst, 1, TGSI_CHAN_X);
sample_id = ac_to_integer(&ctx->ac, sample_id);
/* Section 8.13.2 (Interpolation Functions) of the OpenGL Shading
* Language 4.50 spec says about interpolateAtSample:
*
* "Returns the value of the input interpolant variable at
* the location of sample number sample. If multisample
* buffers are not available, the input variable will be
* evaluated at the center of the pixel. If sample sample
* does not exist, the position used to interpolate the
* input variable is undefined."
*
* This means that sample_id values outside of the valid are
* in fact valid input, and the usual mechanism for loading the
* sample position doesn't work.
*/
if (ctx->shader->key.mono.u.ps.interpolate_at_sample_force_center) {
LLVMValueRef center[4] = {
LLVMConstReal(ctx->f32, 0.5),
LLVMConstReal(ctx->f32, 0.5),
ctx->ac.f32_0,
ctx->ac.f32_0,
};
sample_position = lp_build_gather_values(&ctx->gallivm, center, 4);
} else {
sample_position = load_sample_position(ctx, sample_id);
}
emit_data->args[0] = LLVMBuildExtractElement(ctx->ac.builder,
sample_position,
ctx->i32_0, "");
emit_data->args[0] = LLVMBuildFSub(ctx->ac.builder, emit_data->args[0], halfval, "");
emit_data->args[1] = LLVMBuildExtractElement(ctx->ac.builder,
sample_position,
ctx->i32_1, "");
emit_data->args[1] = LLVMBuildFSub(ctx->ac.builder, emit_data->args[1], halfval, "");
emit_data->arg_count = 2;
}
}
static void build_interp_intrinsic(const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
struct si_shader *shader = ctx->shader;
const struct tgsi_shader_info *info = &shader->selector->info;
LLVMValueRef interp_param;
const struct tgsi_full_instruction *inst = emit_data->inst;
const struct tgsi_full_src_register *input = &inst->Src[0];
int input_base, input_array_size;
int chan;
int i;
LLVMValueRef prim_mask = LLVMGetParam(ctx->main_fn, SI_PARAM_PRIM_MASK);
LLVMValueRef array_idx;
int interp_param_idx;
unsigned interp;
unsigned location;
assert(input->Register.File == TGSI_FILE_INPUT);
if (input->Register.Indirect) {
unsigned array_id = input->Indirect.ArrayID;
if (array_id) {
input_base = info->input_array_first[array_id];
input_array_size = info->input_array_last[array_id] - input_base + 1;
} else {
input_base = inst->Src[0].Register.Index;
input_array_size = info->num_inputs - input_base;
}
array_idx = si_get_indirect_index(ctx, &input->Indirect,
1, input->Register.Index - input_base);
} else {
input_base = inst->Src[0].Register.Index;
input_array_size = 1;
array_idx = ctx->i32_0;
}
interp = shader->selector->info.input_interpolate[input_base];
if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET ||
inst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE)
location = TGSI_INTERPOLATE_LOC_CENTER;
else
location = TGSI_INTERPOLATE_LOC_CENTROID;
interp_param_idx = lookup_interp_param_index(interp, location);
if (interp_param_idx == -1)
return;
else if (interp_param_idx)
interp_param = LLVMGetParam(ctx->main_fn, interp_param_idx);
else
interp_param = NULL;
if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET ||
inst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) {
LLVMValueRef ij_out[2];
LLVMValueRef ddxy_out = si_llvm_emit_ddxy_interp(bld_base, interp_param);
/*
* take the I then J parameters, and the DDX/Y for it, and
* calculate the IJ inputs for the interpolator.
* temp1 = ddx * offset/sample.x + I;
* interp_param.I = ddy * offset/sample.y + temp1;
* temp1 = ddx * offset/sample.x + J;
* interp_param.J = ddy * offset/sample.y + temp1;
*/
for (i = 0; i < 2; i++) {
LLVMValueRef ix_ll = LLVMConstInt(ctx->i32, i, 0);
LLVMValueRef iy_ll = LLVMConstInt(ctx->i32, i + 2, 0);
LLVMValueRef ddx_el = LLVMBuildExtractElement(ctx->ac.builder,
ddxy_out, ix_ll, "");
LLVMValueRef ddy_el = LLVMBuildExtractElement(ctx->ac.builder,
ddxy_out, iy_ll, "");
LLVMValueRef interp_el = LLVMBuildExtractElement(ctx->ac.builder,
interp_param, ix_ll, "");
LLVMValueRef temp1, temp2;
interp_el = ac_to_float(&ctx->ac, interp_el);
temp1 = LLVMBuildFMul(ctx->ac.builder, ddx_el, emit_data->args[0], "");
temp1 = LLVMBuildFAdd(ctx->ac.builder, temp1, interp_el, "");
temp2 = LLVMBuildFMul(ctx->ac.builder, ddy_el, emit_data->args[1], "");
ij_out[i] = LLVMBuildFAdd(ctx->ac.builder, temp2, temp1, "");
}
interp_param = lp_build_gather_values(&ctx->gallivm, ij_out, 2);
}
if (interp_param)
interp_param = ac_to_float(&ctx->ac, interp_param);
for (chan = 0; chan < 4; chan++) {
LLVMValueRef gather = LLVMGetUndef(LLVMVectorType(ctx->f32, input_array_size));
unsigned schan = tgsi_util_get_full_src_register_swizzle(&inst->Src[0], chan);
for (unsigned idx = 0; idx < input_array_size; ++idx) {
LLVMValueRef v, i = NULL, j = NULL;
if (interp_param) {
i = LLVMBuildExtractElement(
ctx->ac.builder, interp_param, ctx->i32_0, "");
j = LLVMBuildExtractElement(
ctx->ac.builder, interp_param, ctx->i32_1, "");
}
v = si_build_fs_interp(ctx, input_base + idx, schan,
prim_mask, i, j);
gather = LLVMBuildInsertElement(ctx->ac.builder,
gather, v, LLVMConstInt(ctx->i32, idx, false), "");
}
emit_data->output[chan] = LLVMBuildExtractElement(
ctx->ac.builder, gather, array_idx, "");
}
}
static void vote_all_emit(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef tmp = ac_build_vote_all(&ctx->ac, emit_data->args[0]);
emit_data->output[emit_data->chan] =
LLVMBuildSExt(ctx->ac.builder, tmp, ctx->i32, "");
}
static void vote_any_emit(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef tmp = ac_build_vote_any(&ctx->ac, emit_data->args[0]);
emit_data->output[emit_data->chan] =
LLVMBuildSExt(ctx->ac.builder, tmp, ctx->i32, "");
}
static void vote_eq_emit(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMValueRef tmp = ac_build_vote_eq(&ctx->ac, emit_data->args[0]);
emit_data->output[emit_data->chan] =
LLVMBuildSExt(ctx->ac.builder, tmp, ctx->i32, "");
}
static void ballot_emit(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
LLVMBuilderRef builder = ctx->ac.builder;
LLVMValueRef tmp;
tmp = lp_build_emit_fetch(bld_base, emit_data->inst, 0, TGSI_CHAN_X);
tmp = ac_build_ballot(&ctx->ac, tmp);
tmp = LLVMBuildBitCast(builder, tmp, ctx->v2i32, "");
emit_data->output[0] = LLVMBuildExtractElement(builder, tmp, ctx->i32_0, "");
emit_data->output[1] = LLVMBuildExtractElement(builder, tmp, ctx->i32_1, "");
}
static void read_invoc_fetch_args(
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
emit_data->args[0] = lp_build_emit_fetch(bld_base, emit_data->inst,
0, emit_data->src_chan);
/* Always read the source invocation (= lane) from the X channel. */
emit_data->args[1] = lp_build_emit_fetch(bld_base, emit_data->inst,
1, TGSI_CHAN_X);
emit_data->arg_count = 2;
}
static void read_lane_emit(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
/* We currently have no other way to prevent LLVM from lifting the icmp
* calls to a dominating basic block.
*/
ac_build_optimization_barrier(&ctx->ac, &emit_data->args[0]);
for (unsigned i = 0; i < emit_data->arg_count; ++i)
emit_data->args[i] = ac_to_integer(&ctx->ac, emit_data->args[i]);
emit_data->output[emit_data->chan] =
ac_build_intrinsic(&ctx->ac, action->intr_name,
ctx->i32, emit_data->args, emit_data->arg_count,
AC_FUNC_ATTR_READNONE |
AC_FUNC_ATTR_CONVERGENT);
}
static unsigned si_llvm_get_stream(struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
struct tgsi_src_register src0 = emit_data->inst->Src[0].Register;
LLVMValueRef imm;
unsigned stream;
assert(src0.File == TGSI_FILE_IMMEDIATE);
imm = ctx->imms[src0.Index * TGSI_NUM_CHANNELS + src0.SwizzleX];
stream = LLVMConstIntGetZExtValue(imm) & 0x3;
return stream;
}
/* Emit one vertex from the geometry shader */
static void si_llvm_emit_vertex(struct ac_shader_abi *abi,
unsigned stream,
LLVMValueRef *addrs)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
struct tgsi_shader_info *info = &ctx->shader->selector->info;
struct lp_build_context *uint = &ctx->bld_base.uint_bld;
struct si_shader *shader = ctx->shader;
struct lp_build_if_state if_state;
LLVMValueRef soffset = LLVMGetParam(ctx->main_fn,
ctx->param_gs2vs_offset);
LLVMValueRef gs_next_vertex;
LLVMValueRef can_emit;
unsigned chan, offset;
int i;
/* Write vertex attribute values to GSVS ring */
gs_next_vertex = LLVMBuildLoad(ctx->ac.builder,
ctx->gs_next_vertex[stream],
"");
/* If this thread has already emitted the declared maximum number of
* vertices, skip the write: excessive vertex emissions are not
* supposed to have any effect.
*
* If the shader has no writes to memory, kill it instead. This skips
* further memory loads and may allow LLVM to skip to the end
* altogether.
*/
can_emit = LLVMBuildICmp(ctx->ac.builder, LLVMIntULT, gs_next_vertex,
LLVMConstInt(ctx->i32,
shader->selector->gs_max_out_vertices, 0), "");
bool use_kill = !info->writes_memory;
if (use_kill) {
ac_build_kill_if_false(&ctx->ac, can_emit);
} else {
lp_build_if(&if_state, &ctx->gallivm, can_emit);
}
offset = 0;
for (i = 0; i < info->num_outputs; i++) {
for (chan = 0; chan < 4; chan++) {
if (!(info->output_usagemask[i] & (1 << chan)) ||
((info->output_streams[i] >> (2 * chan)) & 3) != stream)
continue;
LLVMValueRef out_val = LLVMBuildLoad(ctx->ac.builder, addrs[4 * i + chan], "");
LLVMValueRef voffset =
LLVMConstInt(ctx->i32, offset *
shader->selector->gs_max_out_vertices, 0);
offset++;
voffset = lp_build_add(uint, voffset, gs_next_vertex);
voffset = lp_build_mul_imm(uint, voffset, 4);
out_val = ac_to_integer(&ctx->ac, out_val);
ac_build_buffer_store_dword(&ctx->ac,
ctx->gsvs_ring[stream],
out_val, 1,
voffset, soffset, 0,
1, 1, true, true);
}
}
gs_next_vertex = lp_build_add(uint, gs_next_vertex,
ctx->i32_1);
LLVMBuildStore(ctx->ac.builder, gs_next_vertex, ctx->gs_next_vertex[stream]);
/* Signal vertex emission */
ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_OP_EMIT | AC_SENDMSG_GS | (stream << 8),
si_get_gs_wave_id(ctx));
if (!use_kill)
lp_build_endif(&if_state);
}
/* Emit one vertex from the geometry shader */
static void si_tgsi_emit_vertex(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
unsigned stream = si_llvm_get_stream(bld_base, emit_data);
si_llvm_emit_vertex(&ctx->abi, stream, ctx->outputs[0]);
}
/* Cut one primitive from the geometry shader */
static void si_llvm_emit_primitive(struct ac_shader_abi *abi,
unsigned stream)
{
struct si_shader_context *ctx = si_shader_context_from_abi(abi);
/* Signal primitive cut */
ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_OP_CUT | AC_SENDMSG_GS | (stream << 8),
si_get_gs_wave_id(ctx));
}
/* Cut one primitive from the geometry shader */
static void si_tgsi_emit_primitive(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
si_llvm_emit_primitive(&ctx->abi, si_llvm_get_stream(bld_base, emit_data));
}
static void si_llvm_emit_barrier(const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
struct si_shader_context *ctx = si_shader_context(bld_base);
/* SI only (thanks to a hw bug workaround):
* The real barrier instruction isn’t needed, because an entire patch
* always fits into a single wave.
*/
if (ctx->screen->info.chip_class == SI &&
ctx->type == PIPE_SHADER_TESS_CTRL) {
ac_build_waitcnt(&ctx->ac, LGKM_CNT & VM_CNT);
return;
}
lp_build_intrinsic(ctx->ac.builder,
"llvm.amdgcn.s.barrier",
ctx->voidt, NULL, 0, LP_FUNC_ATTR_CONVERGENT);
}
static const struct lp_build_tgsi_action interp_action = {
.fetch_args = interp_fetch_args,
.emit = build_interp_intrinsic,
};
static void si_create_function(struct si_shader_context *ctx,
const char *name,
LLVMTypeRef *returns, unsigned num_returns,
struct si_function_info *fninfo,
unsigned max_workgroup_size)
{
int i;
si_llvm_create_func(ctx, name, returns, num_returns,
fninfo->types, fninfo->num_params);
ctx->return_value = LLVMGetUndef(ctx->return_type);
for (i = 0; i < fninfo->num_sgpr_params; ++i) {
LLVMValueRef P = LLVMGetParam(ctx->main_fn, i);
/* The combination of:
* - ByVal
* - dereferenceable
* - invariant.load
* allows the optimization passes to move loads and reduces
* SGPR spilling significantly.
*/
if (LLVMGetTypeKind(LLVMTypeOf(P)) == LLVMPointerTypeKind) {
lp_add_function_attr(ctx->main_fn, i + 1, LP_FUNC_ATTR_BYVAL);
lp_add_function_attr(ctx->main_fn, i + 1, LP_FUNC_ATTR_NOALIAS);
ac_add_attr_dereferenceable(P, UINT64_MAX);
} else
lp_add_function_attr(ctx->main_fn, i + 1, LP_FUNC_ATTR_INREG);
}
for (i = 0; i < fninfo->num_params; ++i) {
if (fninfo->assign[i])
*fninfo->assign[i] = LLVMGetParam(ctx->main_fn, i);
}
if (max_workgroup_size) {
si_llvm_add_attribute(ctx->main_fn, "amdgpu-max-work-group-size",
max_workgroup_size);
}
LLVMAddTargetDependentFunctionAttr(ctx->main_fn,
"no-signed-zeros-fp-math",
"true");
if (ctx->screen->debug_flags & DBG(UNSAFE_MATH)) {
/* These were copied from some LLVM test. */
LLVMAddTargetDependentFunctionAttr(ctx->main_fn,
"less-precise-fpmad",
"true");
LLVMAddTargetDependentFunctionAttr(ctx->main_fn,
"no-infs-fp-math",
"true");
LLVMAddTargetDependentFunctionAttr(ctx->main_fn,
"no-nans-fp-math",
"true");
LLVMAddTargetDependentFunctionAttr(ctx->main_fn,
"unsafe-fp-math",
"true");
}
}
static void declare_streamout_params(struct si_shader_context *ctx,
struct pipe_stream_output_info *so,
struct si_function_info *fninfo)
{
int i;
/* Streamout SGPRs. */
if (so->num_outputs) {
if (ctx->type != PIPE_SHADER_TESS_EVAL)
ctx->param_streamout_config = add_arg(fninfo, ARG_SGPR, ctx->ac.i32);
else
ctx->param_streamout_config = fninfo->num_params - 1;
ctx->param_streamout_write_index = add_arg(fninfo, ARG_SGPR, ctx->ac.i32);
}
/* A streamout buffer offset is loaded if the stride is non-zero. */
for (i = 0; i < 4; i++) {
if (!so->stride[i])
continue;
ctx->param_streamout_offset[i] = add_arg(fninfo, ARG_SGPR, ctx->ac.i32);
}
}
static unsigned si_get_max_workgroup_size(const struct si_shader *shader)
{
switch (shader->selector->type) {
case PIPE_SHADER_TESS_CTRL:
/* Return this so that LLVM doesn't remove s_barrier
* instructions on chips where we use s_barrier. */
return shader->selector->screen->info.chip_class >= CIK ? 128 : 64;
case PIPE_SHADER_GEOMETRY:
return shader->selector->screen->info.chip_class >= GFX9 ? 128 : 64;
case PIPE_SHADER_COMPUTE:
break; /* see below */
default:
return 0;
}
const unsigned *properties = shader->selector->info.properties;
unsigned max_work_group_size =
properties[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH] *
properties[TGSI_PROPERTY_CS_FIXED_BLOCK_HEIGHT] *
properties[TGSI_PROPERTY_CS_FIXED_BLOCK_DEPTH];
if (!max_work_group_size) {
/* This is a variable group size compute shader,
* compile it for the maximum possible group size.
*/
max_work_group_size = SI_MAX_VARIABLE_THREADS_PER_BLOCK;
}
return max_work_group_size;
}
static void declare_per_stage_desc_pointers(struct si_shader_context *ctx,
struct si_function_info *fninfo,
bool assign_params)
{
LLVMTypeRef const_shader_buf_type;
if (ctx->shader->selector->info.const_buffers_declared == 1 &&
ctx->shader->selector->info.shader_buffers_declared == 0)
const_shader_buf_type = ctx->f32;
else
const_shader_buf_type = ctx->v4i32;
unsigned const_and_shader_buffers =
add_arg(fninfo, ARG_SGPR,
si_const_array(const_shader_buf_type, 0));
unsigned samplers_and_images =
add_arg(fninfo, ARG_SGPR,
si_const_array(ctx->v8i32,
SI_NUM_IMAGES + SI_NUM_SAMPLERS * 2));
if (assign_params) {
ctx->param_const_and_shader_buffers = const_and_shader_buffers;
ctx->param_samplers_and_images = samplers_and_images;
}
}
static void declare_global_desc_pointers(struct si_shader_context *ctx,
struct si_function_info *fninfo)
{
ctx->param_rw_buffers = add_arg(fninfo, ARG_SGPR,
si_const_array(ctx->v4i32, SI_NUM_RW_BUFFERS));
ctx->param_bindless_samplers_and_images = add_arg(fninfo, ARG_SGPR,
si_const_array(ctx->v8i32, 0));
}
static void declare_vs_specific_input_sgprs(struct si_shader_context *ctx,
struct si_function_info *fninfo)
{
ctx->param_vertex_buffers = add_arg(fninfo, ARG_SGPR,
si_const_array(ctx->v4i32, SI_NUM_VERTEX_BUFFERS));
add_arg_assign(fninfo, ARG_SGPR, ctx->i32, &ctx->abi.base_vertex);
add_arg_assign(fninfo, ARG_SGPR, ctx->i32, &ctx->abi.start_instance);
add_arg_assign(fninfo, ARG_SGPR, ctx->i32, &ctx->abi.draw_id);
ctx->param_vs_state_bits = add_arg(fninfo, ARG_SGPR, ctx->i32);
}
static void declare_vs_input_vgprs(struct si_shader_context *ctx,
struct si_function_info *fninfo,
unsigned *num_prolog_vgprs)
{
struct si_shader *shader = ctx->shader;
add_arg_assign(fninfo, ARG_VGPR, ctx->i32, &ctx->abi.vertex_id);
if (shader->key.as_ls) {
ctx->param_rel_auto_id = add_arg(fninfo, ARG_VGPR, ctx->i32);
add_arg_assign(fninfo, ARG_VGPR, ctx->i32, &ctx->abi.instance_id);
} else {
add_arg_assign(fninfo, ARG_VGPR, ctx->i32, &ctx->abi.instance_id);
ctx->param_vs_prim_id = add_arg(fninfo, ARG_VGPR, ctx->i32);
}
add_arg(fninfo, ARG_VGPR, ctx->i32); /* unused */
if (!shader->is_gs_copy_shader) {
/* Vertex load indices. */
ctx->param_vertex_index0 = fninfo->num_params;
for (unsigned i = 0; i < shader->selector->info.num_inputs; i++)
add_arg(fninfo, ARG_VGPR, ctx->i32);
*num_prolog_vgprs += shader->selector->info.num_inputs;
}
}
static void declare_tes_input_vgprs(struct si_shader_context *ctx,
struct si_function_info *fninfo)
{
ctx->param_tes_u = add_arg(fninfo, ARG_VGPR, ctx->f32);
ctx->param_tes_v = add_arg(fninfo, ARG_VGPR, ctx->f32);
ctx->param_tes_rel_patch_id = add_arg(fninfo, ARG_VGPR, ctx->i32);
add_arg_assign(fninfo, ARG_VGPR, ctx->i32, &ctx->abi.tes_patch_id);
}
enum {
/* Convenient merged shader definitions. */
SI_SHADER_MERGED_VERTEX_TESSCTRL = PIPE_SHADER_TYPES,
SI_SHADER_MERGED_VERTEX_OR_TESSEVAL_GEOMETRY,
};
static void create_function(struct si_shader_context *ctx)
{
struct si_shader *shader = ctx->shader;
struct si_function_info fninfo;
LLVMTypeRef returns[16+32*4];
unsigned i, num_return_sgprs;
unsigned num_returns = 0;
unsigned num_prolog_vgprs = 0;
unsigned type = ctx->type;
unsigned vs_blit_property =
shader->selector->info.properties[TGSI_PROPERTY_VS_BLIT_SGPRS];
si_init_function_info(&fninfo);
/* Set MERGED shaders. */
if (ctx->screen->info.chip_class >= GFX9) {
if (shader->key.as_ls || type == PIPE_SHADER_TESS_CTRL)
type = SI_SHADER_MERGED_VERTEX_TESSCTRL; /* LS or HS */
else if (shader->key.as_es || type == PIPE_SHADER_GEOMETRY)
type = SI_SHADER_MERGED_VERTEX_OR_TESSEVAL_GEOMETRY;
}
LLVMTypeRef v3i32 = LLVMVectorType(ctx->i32, 3);
switch (type) {
case PIPE_SHADER_VERTEX:
declare_global_desc_pointers(ctx, &fninfo);
if (vs_blit_property) {
ctx->param_vs_blit_inputs = fninfo.num_params;
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* i16 x1, y1 */
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* i16 x2, y2 */
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* depth */
if (vs_blit_property == SI_VS_BLIT_SGPRS_POS_COLOR) {
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* color0 */
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* color1 */
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* color2 */
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* color3 */
} else if (vs_blit_property == SI_VS_BLIT_SGPRS_POS_TEXCOORD) {
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* texcoord.x1 */
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* texcoord.y1 */
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* texcoord.x2 */
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* texcoord.y2 */
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* texcoord.z */
add_arg(&fninfo, ARG_SGPR, ctx->f32); /* texcoord.w */
}
/* VGPRs */
declare_vs_input_vgprs(ctx, &fninfo, &num_prolog_vgprs);
break;
}
declare_per_stage_desc_pointers(ctx, &fninfo, true);
declare_vs_specific_input_sgprs(ctx, &fninfo);
if (shader->key.as_es) {
ctx->param_es2gs_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
} else if (shader->key.as_ls) {
/* no extra parameters */
} else {
if (shader->is_gs_copy_shader) {
fninfo.num_params = ctx->param_rw_buffers + 1;
fninfo.num_sgpr_params = fninfo.num_params;
}
/* The locations of the other parameters are assigned dynamically. */
declare_streamout_params(ctx, &shader->selector->so,
&fninfo);
}
/* VGPRs */
declare_vs_input_vgprs(ctx, &fninfo, &num_prolog_vgprs);
break;
case PIPE_SHADER_TESS_CTRL: /* SI-CI-VI */
declare_global_desc_pointers(ctx, &fninfo);
declare_per_stage_desc_pointers(ctx, &fninfo, true);
ctx->param_tcs_offchip_layout = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_out_lds_offsets = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_out_lds_layout = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_vs_state_bits = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_offchip_addr_base64k = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_factor_addr_base64k = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_offchip_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_factor_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
/* VGPRs */
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->abi.tcs_patch_id);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->abi.tcs_rel_ids);
/* param_tcs_offchip_offset and param_tcs_factor_offset are
* placed after the user SGPRs.
*/
for (i = 0; i < GFX6_TCS_NUM_USER_SGPR + 2; i++)
returns[num_returns++] = ctx->i32; /* SGPRs */
for (i = 0; i < 11; i++)
returns[num_returns++] = ctx->f32; /* VGPRs */
break;
case SI_SHADER_MERGED_VERTEX_TESSCTRL:
/* Merged stages have 8 system SGPRs at the beginning. */
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* SPI_SHADER_USER_DATA_ADDR_LO_HS */
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* SPI_SHADER_USER_DATA_ADDR_HI_HS */
ctx->param_tcs_offchip_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_merged_wave_info = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_factor_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_merged_scratch_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused */
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused */
declare_global_desc_pointers(ctx, &fninfo);
declare_per_stage_desc_pointers(ctx, &fninfo,
ctx->type == PIPE_SHADER_VERTEX);
declare_vs_specific_input_sgprs(ctx, &fninfo);
ctx->param_tcs_offchip_layout = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_out_lds_offsets = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_out_lds_layout = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_offchip_addr_base64k = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_factor_addr_base64k = add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused */
declare_per_stage_desc_pointers(ctx, &fninfo,
ctx->type == PIPE_SHADER_TESS_CTRL);
/* VGPRs (first TCS, then VS) */
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->abi.tcs_patch_id);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->abi.tcs_rel_ids);
if (ctx->type == PIPE_SHADER_VERTEX) {
declare_vs_input_vgprs(ctx, &fninfo,
&num_prolog_vgprs);
/* LS return values are inputs to the TCS main shader part. */
for (i = 0; i < 8 + GFX9_TCS_NUM_USER_SGPR; i++)
returns[num_returns++] = ctx->i32; /* SGPRs */
for (i = 0; i < 2; i++)
returns[num_returns++] = ctx->f32; /* VGPRs */
} else {
/* TCS return values are inputs to the TCS epilog.
*
* param_tcs_offchip_offset, param_tcs_factor_offset,
* param_tcs_offchip_layout, and param_rw_buffers
* should be passed to the epilog.
*/
for (i = 0; i <= 8 + GFX9_SGPR_TCS_FACTOR_ADDR_BASE64K; i++)
returns[num_returns++] = ctx->i32; /* SGPRs */
for (i = 0; i < 11; i++)
returns[num_returns++] = ctx->f32; /* VGPRs */
}
break;
case SI_SHADER_MERGED_VERTEX_OR_TESSEVAL_GEOMETRY:
/* Merged stages have 8 system SGPRs at the beginning. */
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused (SPI_SHADER_USER_DATA_ADDR_LO_GS) */
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused (SPI_SHADER_USER_DATA_ADDR_HI_GS) */
ctx->param_gs2vs_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_merged_wave_info = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_offchip_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_merged_scratch_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused (SPI_SHADER_PGM_LO/HI_GS << 8) */
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused (SPI_SHADER_PGM_LO/HI_GS >> 24) */
declare_global_desc_pointers(ctx, &fninfo);
declare_per_stage_desc_pointers(ctx, &fninfo,
(ctx->type == PIPE_SHADER_VERTEX ||
ctx->type == PIPE_SHADER_TESS_EVAL));
if (ctx->type == PIPE_SHADER_VERTEX) {
declare_vs_specific_input_sgprs(ctx, &fninfo);
} else {
/* TESS_EVAL (and also GEOMETRY):
* Declare as many input SGPRs as the VS has. */
ctx->param_tcs_offchip_layout = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_offchip_addr_base64k = add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused */
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused */
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused */
ctx->param_vs_state_bits = add_arg(&fninfo, ARG_SGPR, ctx->i32); /* unused */
}
declare_per_stage_desc_pointers(ctx, &fninfo,
ctx->type == PIPE_SHADER_GEOMETRY);
/* VGPRs (first GS, then VS/TES) */
ctx->param_gs_vtx01_offset = add_arg(&fninfo, ARG_VGPR, ctx->i32);
ctx->param_gs_vtx23_offset = add_arg(&fninfo, ARG_VGPR, ctx->i32);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->abi.gs_prim_id);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->abi.gs_invocation_id);
ctx->param_gs_vtx45_offset = add_arg(&fninfo, ARG_VGPR, ctx->i32);
if (ctx->type == PIPE_SHADER_VERTEX) {
declare_vs_input_vgprs(ctx, &fninfo,
&num_prolog_vgprs);
} else if (ctx->type == PIPE_SHADER_TESS_EVAL) {
declare_tes_input_vgprs(ctx, &fninfo);
}
if (ctx->type == PIPE_SHADER_VERTEX ||
ctx->type == PIPE_SHADER_TESS_EVAL) {
/* ES return values are inputs to GS. */
for (i = 0; i < 8 + GFX9_GS_NUM_USER_SGPR; i++)
returns[num_returns++] = ctx->i32; /* SGPRs */
for (i = 0; i < 5; i++)
returns[num_returns++] = ctx->f32; /* VGPRs */
}
break;
case PIPE_SHADER_TESS_EVAL:
declare_global_desc_pointers(ctx, &fninfo);
declare_per_stage_desc_pointers(ctx, &fninfo, true);
ctx->param_tcs_offchip_layout = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_offchip_addr_base64k = add_arg(&fninfo, ARG_SGPR, ctx->i32);
if (shader->key.as_es) {
ctx->param_tcs_offchip_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_es2gs_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
} else {
add_arg(&fninfo, ARG_SGPR, ctx->i32);
declare_streamout_params(ctx, &shader->selector->so,
&fninfo);
ctx->param_tcs_offchip_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
}
/* VGPRs */
declare_tes_input_vgprs(ctx, &fninfo);
break;
case PIPE_SHADER_GEOMETRY:
declare_global_desc_pointers(ctx, &fninfo);
declare_per_stage_desc_pointers(ctx, &fninfo, true);
ctx->param_gs2vs_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_gs_wave_id = add_arg(&fninfo, ARG_SGPR, ctx->i32);
/* VGPRs */
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->gs_vtx_offset[0]);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->gs_vtx_offset[1]);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->abi.gs_prim_id);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->gs_vtx_offset[2]);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->gs_vtx_offset[3]);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->gs_vtx_offset[4]);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->gs_vtx_offset[5]);
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &ctx->abi.gs_invocation_id);
break;
case PIPE_SHADER_FRAGMENT:
declare_global_desc_pointers(ctx, &fninfo);
declare_per_stage_desc_pointers(ctx, &fninfo, true);
add_arg_checked(&fninfo, ARG_SGPR, ctx->f32, SI_PARAM_ALPHA_REF);
add_arg_checked(&fninfo, ARG_SGPR, ctx->i32, SI_PARAM_PRIM_MASK);
add_arg_checked(&fninfo, ARG_VGPR, ctx->v2i32, SI_PARAM_PERSP_SAMPLE);
add_arg_checked(&fninfo, ARG_VGPR, ctx->v2i32, SI_PARAM_PERSP_CENTER);
add_arg_checked(&fninfo, ARG_VGPR, ctx->v2i32, SI_PARAM_PERSP_CENTROID);
add_arg_checked(&fninfo, ARG_VGPR, v3i32, SI_PARAM_PERSP_PULL_MODEL);
add_arg_checked(&fninfo, ARG_VGPR, ctx->v2i32, SI_PARAM_LINEAR_SAMPLE);
add_arg_checked(&fninfo, ARG_VGPR, ctx->v2i32, SI_PARAM_LINEAR_CENTER);
add_arg_checked(&fninfo, ARG_VGPR, ctx->v2i32, SI_PARAM_LINEAR_CENTROID);
add_arg_checked(&fninfo, ARG_VGPR, ctx->f32, SI_PARAM_LINE_STIPPLE_TEX);
add_arg_assign_checked(&fninfo, ARG_VGPR, ctx->f32,
&ctx->abi.frag_pos[0], SI_PARAM_POS_X_FLOAT);
add_arg_assign_checked(&fninfo, ARG_VGPR, ctx->f32,
&ctx->abi.frag_pos[1], SI_PARAM_POS_Y_FLOAT);
add_arg_assign_checked(&fninfo, ARG_VGPR, ctx->f32,
&ctx->abi.frag_pos[2], SI_PARAM_POS_Z_FLOAT);
add_arg_assign_checked(&fninfo, ARG_VGPR, ctx->f32,
&ctx->abi.frag_pos[3], SI_PARAM_POS_W_FLOAT);
add_arg_assign_checked(&fninfo, ARG_VGPR, ctx->i32,
&ctx->abi.front_face, SI_PARAM_FRONT_FACE);
shader->info.face_vgpr_index = 20;
add_arg_assign_checked(&fninfo, ARG_VGPR, ctx->i32,
&ctx->abi.ancillary, SI_PARAM_ANCILLARY);
shader->info.ancillary_vgpr_index = 21;
add_arg_assign_checked(&fninfo, ARG_VGPR, ctx->f32,
&ctx->abi.sample_coverage, SI_PARAM_SAMPLE_COVERAGE);
add_arg_checked(&fninfo, ARG_VGPR, ctx->i32, SI_PARAM_POS_FIXED_PT);
/* Color inputs from the prolog. */
if (shader->selector->info.colors_read) {
unsigned num_color_elements =
util_bitcount(shader->selector->info.colors_read);
assert(fninfo.num_params + num_color_elements <= ARRAY_SIZE(fninfo.types));
for (i = 0; i < num_color_elements; i++)
add_arg(&fninfo, ARG_VGPR, ctx->f32);
num_prolog_vgprs += num_color_elements;
}
/* Outputs for the epilog. */
num_return_sgprs = SI_SGPR_ALPHA_REF + 1;
num_returns =
num_return_sgprs +
util_bitcount(shader->selector->info.colors_written) * 4 +
shader->selector->info.writes_z +
shader->selector->info.writes_stencil +
shader->selector->info.writes_samplemask +
1 /* SampleMaskIn */;
num_returns = MAX2(num_returns,
num_return_sgprs +
PS_EPILOG_SAMPLEMASK_MIN_LOC + 1);
for (i = 0; i < num_return_sgprs; i++)
returns[i] = ctx->i32;
for (; i < num_returns; i++)
returns[i] = ctx->f32;
break;
case PIPE_SHADER_COMPUTE:
declare_global_desc_pointers(ctx, &fninfo);
declare_per_stage_desc_pointers(ctx, &fninfo, true);
if (shader->selector->info.uses_grid_size)
ctx->param_grid_size = add_arg(&fninfo, ARG_SGPR, v3i32);
if (shader->selector->info.uses_block_size)
ctx->param_block_size = add_arg(&fninfo, ARG_SGPR, v3i32);
for (i = 0; i < 3; i++) {
ctx->param_block_id[i] = -1;
if (shader->selector->info.uses_block_id[i])
ctx->param_block_id[i] = add_arg(&fninfo, ARG_SGPR, ctx->i32);
}
ctx->param_thread_id = add_arg(&fninfo, ARG_VGPR, v3i32);
break;
default:
assert(0 && "unimplemented shader");
return;
}
si_create_function(ctx, "main", returns, num_returns, &fninfo,
si_get_max_workgroup_size(shader));
/* Reserve register locations for VGPR inputs the PS prolog may need. */
if (ctx->type == PIPE_SHADER_FRAGMENT &&
ctx->separate_prolog) {
si_llvm_add_attribute(ctx->main_fn,
"InitialPSInputAddr",
S_0286D0_PERSP_SAMPLE_ENA(1) |
S_0286D0_PERSP_CENTER_ENA(1) |
S_0286D0_PERSP_CENTROID_ENA(1) |
S_0286D0_LINEAR_SAMPLE_ENA(1) |
S_0286D0_LINEAR_CENTER_ENA(1) |
S_0286D0_LINEAR_CENTROID_ENA(1) |
S_0286D0_FRONT_FACE_ENA(1) |
S_0286D0_ANCILLARY_ENA(1) |
S_0286D0_POS_FIXED_PT_ENA(1));
}
shader->info.num_input_sgprs = 0;
shader->info.num_input_vgprs = 0;
for (i = 0; i < fninfo.num_sgpr_params; ++i)
shader->info.num_input_sgprs += ac_get_type_size(fninfo.types[i]) / 4;
for (; i < fninfo.num_params; ++i)
shader->info.num_input_vgprs += ac_get_type_size(fninfo.types[i]) / 4;
assert(shader->info.num_input_vgprs >= num_prolog_vgprs);
shader->info.num_input_vgprs -= num_prolog_vgprs;
if (shader->key.as_ls ||
ctx->type == PIPE_SHADER_TESS_CTRL ||
/* GFX9 has the ESGS ring buffer in LDS. */
type == SI_SHADER_MERGED_VERTEX_OR_TESSEVAL_GEOMETRY)
ac_declare_lds_as_pointer(&ctx->ac);
}
/**
* Load ESGS and GSVS ring buffer resource descriptors and save the variables
* for later use.
*/
static void preload_ring_buffers(struct si_shader_context *ctx)
{
LLVMBuilderRef builder = ctx->ac.builder;
LLVMValueRef buf_ptr = LLVMGetParam(ctx->main_fn,
ctx->param_rw_buffers);
if (ctx->screen->info.chip_class <= VI &&
(ctx->shader->key.as_es || ctx->type == PIPE_SHADER_GEOMETRY)) {
unsigned ring =
ctx->type == PIPE_SHADER_GEOMETRY ? SI_GS_RING_ESGS
: SI_ES_RING_ESGS;
LLVMValueRef offset = LLVMConstInt(ctx->i32, ring, 0);
ctx->esgs_ring =
ac_build_load_to_sgpr(&ctx->ac, buf_ptr, offset);
}
if (ctx->shader->is_gs_copy_shader) {
LLVMValueRef offset = LLVMConstInt(ctx->i32, SI_RING_GSVS, 0);
ctx->gsvs_ring[0] =
ac_build_load_to_sgpr(&ctx->ac, buf_ptr, offset);
} else if (ctx->type == PIPE_SHADER_GEOMETRY) {
const struct si_shader_selector *sel = ctx->shader->selector;
LLVMValueRef offset = LLVMConstInt(ctx->i32, SI_RING_GSVS, 0);
LLVMValueRef base_ring;
base_ring = ac_build_load_to_sgpr(&ctx->ac, buf_ptr, offset);
/* The conceptual layout of the GSVS ring is
* v0c0 .. vLv0 v0c1 .. vLc1 ..
* but the real memory layout is swizzled across
* threads:
* t0v0c0 .. t15v0c0 t0v1c0 .. t15v1c0 ... t15vLcL
* t16v0c0 ..
* Override the buffer descriptor accordingly.
*/
LLVMTypeRef v2i64 = LLVMVectorType(ctx->i64, 2);
uint64_t stream_offset = 0;
for (unsigned stream = 0; stream < 4; ++stream) {
unsigned num_components;
unsigned stride;
unsigned num_records;
LLVMValueRef ring, tmp;
num_components = sel->info.num_stream_output_components[stream];
if (!num_components)
continue;
stride = 4 * num_components * sel->gs_max_out_vertices;
/* Limit on the stride field for <= CIK. */
assert(stride < (1 << 14));
num_records = 64;
ring = LLVMBuildBitCast(builder, base_ring, v2i64, "");
tmp = LLVMBuildExtractElement(builder, ring, ctx->i32_0, "");
tmp = LLVMBuildAdd(builder, tmp,
LLVMConstInt(ctx->i64,
stream_offset, 0), "");
stream_offset += stride * 64;
ring = LLVMBuildInsertElement(builder, ring, tmp, ctx->i32_0, "");
ring = LLVMBuildBitCast(builder, ring, ctx->v4i32, "");
tmp = LLVMBuildExtractElement(builder, ring, ctx->i32_1, "");
tmp = LLVMBuildOr(builder, tmp,
LLVMConstInt(ctx->i32,
S_008F04_STRIDE(stride) |
S_008F04_SWIZZLE_ENABLE(1), 0), "");
ring = LLVMBuildInsertElement(builder, ring, tmp, ctx->i32_1, "");
ring = LLVMBuildInsertElement(builder, ring,
LLVMConstInt(ctx->i32, num_records, 0),
LLVMConstInt(ctx->i32, 2, 0), "");
ring = LLVMBuildInsertElement(builder, ring,
LLVMConstInt(ctx->i32,
S_008F0C_DST_SEL_X(V_008F0C_SQ_SEL_X) |
S_008F0C_DST_SEL_Y(V_008F0C_SQ_SEL_Y) |
S_008F0C_DST_SEL_Z(V_008F0C_SQ_SEL_Z) |
S_008F0C_DST_SEL_W(V_008F0C_SQ_SEL_W) |
S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) |
S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32) |
S_008F0C_ELEMENT_SIZE(1) | /* element_size = 4 (bytes) */
S_008F0C_INDEX_STRIDE(1) | /* index_stride = 16 (elements) */
S_008F0C_ADD_TID_ENABLE(1),
0),
LLVMConstInt(ctx->i32, 3, 0), "");
ctx->gsvs_ring[stream] = ring;
}
}
}
static void si_llvm_emit_polygon_stipple(struct si_shader_context *ctx,
LLVMValueRef param_rw_buffers,
unsigned param_pos_fixed_pt)
{
LLVMBuilderRef builder = ctx->ac.builder;
LLVMValueRef slot, desc, offset, row, bit, address[2];
/* Use the fixed-point gl_FragCoord input.
* Since the stipple pattern is 32x32 and it repeats, just get 5 bits
* per coordinate to get the repeating effect.
*/
address[0] = unpack_param(ctx, param_pos_fixed_pt, 0, 5);
address[1] = unpack_param(ctx, param_pos_fixed_pt, 16, 5);
/* Load the buffer descriptor. */
slot = LLVMConstInt(ctx->i32, SI_PS_CONST_POLY_STIPPLE, 0);
desc = ac_build_load_to_sgpr(&ctx->ac, param_rw_buffers, slot);
/* The stipple pattern is 32x32, each row has 32 bits. */
offset = LLVMBuildMul(builder, address[1],
LLVMConstInt(ctx->i32, 4, 0), "");
row = buffer_load_const(ctx, desc, offset);
row = ac_to_integer(&ctx->ac, row);
bit = LLVMBuildLShr(builder, row, address[0], "");
bit = LLVMBuildTrunc(builder, bit, ctx->i1, "");
ac_build_kill_if_false(&ctx->ac, bit);
}
void si_shader_binary_read_config(struct ac_shader_binary *binary,
struct si_shader_config *conf,
unsigned symbol_offset)
{
unsigned i;
const unsigned char *config =
ac_shader_binary_config_start(binary, symbol_offset);
bool really_needs_scratch = false;
/* LLVM adds SGPR spills to the scratch size.
* Find out if we really need the scratch buffer.
*/
for (i = 0; i < binary->reloc_count; i++) {
const struct ac_shader_reloc *reloc = &binary->relocs[i];
if (!strcmp(scratch_rsrc_dword0_symbol, reloc->name) ||
!strcmp(scratch_rsrc_dword1_symbol, reloc->name)) {
really_needs_scratch = true;
break;
}
}
/* XXX: We may be able to emit some of these values directly rather than
* extracting fields to be emitted later.
*/
for (i = 0; i < binary->config_size_per_symbol; i+= 8) {
unsigned reg = util_le32_to_cpu(*(uint32_t*)(config + i));
unsigned value = util_le32_to_cpu(*(uint32_t*)(config + i + 4));
switch (reg) {
case R_00B028_SPI_SHADER_PGM_RSRC1_PS:
case R_00B128_SPI_SHADER_PGM_RSRC1_VS:
case R_00B228_SPI_SHADER_PGM_RSRC1_GS:
case R_00B428_SPI_SHADER_PGM_RSRC1_HS:
case R_00B848_COMPUTE_PGM_RSRC1:
conf->num_sgprs = MAX2(conf->num_sgprs, (G_00B028_SGPRS(value) + 1) * 8);
conf->num_vgprs = MAX2(conf->num_vgprs, (G_00B028_VGPRS(value) + 1) * 4);
conf->float_mode = G_00B028_FLOAT_MODE(value);
conf->rsrc1 = value;
break;
case R_00B02C_SPI_SHADER_PGM_RSRC2_PS:
conf->lds_size = MAX2(conf->lds_size, G_00B02C_EXTRA_LDS_SIZE(value));
break;
case R_00B84C_COMPUTE_PGM_RSRC2:
conf->lds_size = MAX2(conf->lds_size, G_00B84C_LDS_SIZE(value));
conf->rsrc2 = value;
break;
case R_0286CC_SPI_PS_INPUT_ENA:
conf->spi_ps_input_ena = value;
break;
case R_0286D0_SPI_PS_INPUT_ADDR:
conf->spi_ps_input_addr = value;
break;
case R_0286E8_SPI_TMPRING_SIZE:
case R_00B860_COMPUTE_TMPRING_SIZE:
/* WAVESIZE is in units of 256 dwords. */
if (really_needs_scratch)
conf->scratch_bytes_per_wave =
G_00B860_WAVESIZE(value) * 256 * 4;
break;
case 0x4: /* SPILLED_SGPRS */
conf->spilled_sgprs = value;
break;
case 0x8: /* SPILLED_VGPRS */
conf->spilled_vgprs = value;
break;
default:
{
static bool printed;
if (!printed) {
fprintf(stderr, "Warning: LLVM emitted unknown "
"config register: 0x%x\n", reg);
printed = true;
}
}
break;
}
}
if (!conf->spi_ps_input_addr)
conf->spi_ps_input_addr = conf->spi_ps_input_ena;
}
void si_shader_apply_scratch_relocs(struct si_shader *shader,
uint64_t scratch_va)
{
unsigned i;
uint32_t scratch_rsrc_dword0 = scratch_va;
uint32_t scratch_rsrc_dword1 =
S_008F04_BASE_ADDRESS_HI(scratch_va >> 32);
/* Enable scratch coalescing. */
scratch_rsrc_dword1 |= S_008F04_SWIZZLE_ENABLE(1);
for (i = 0 ; i < shader->binary.reloc_count; i++) {
const struct ac_shader_reloc *reloc =
&shader->binary.relocs[i];
if (!strcmp(scratch_rsrc_dword0_symbol, reloc->name)) {
util_memcpy_cpu_to_le32(shader->binary.code + reloc->offset,
&scratch_rsrc_dword0, 4);
} else if (!strcmp(scratch_rsrc_dword1_symbol, reloc->name)) {
util_memcpy_cpu_to_le32(shader->binary.code + reloc->offset,
&scratch_rsrc_dword1, 4);
}
}
}
static unsigned si_get_shader_binary_size(const struct si_shader *shader)
{
unsigned size = shader->binary.code_size;
if (shader->prolog)
size += shader->prolog->binary.code_size;
if (shader->previous_stage)
size += shader->previous_stage->binary.code_size;
if (shader->prolog2)
size += shader->prolog2->binary.code_size;
if (shader->epilog)
size += shader->epilog->binary.code_size;
return size;
}
int si_shader_binary_upload(struct si_screen *sscreen, struct si_shader *shader)
{
const struct ac_shader_binary *prolog =
shader->prolog ? &shader->prolog->binary : NULL;
const struct ac_shader_binary *previous_stage =
shader->previous_stage ? &shader->previous_stage->binary : NULL;
const struct ac_shader_binary *prolog2 =
shader->prolog2 ? &shader->prolog2->binary : NULL;
const struct ac_shader_binary *epilog =
shader->epilog ? &shader->epilog->binary : NULL;
const struct ac_shader_binary *mainb = &shader->binary;
unsigned bo_size = si_get_shader_binary_size(shader) +
(!epilog ? mainb->rodata_size : 0);
unsigned char *ptr;
assert(!prolog || !prolog->rodata_size);
assert(!previous_stage || !previous_stage->rodata_size);
assert(!prolog2 || !prolog2->rodata_size);
assert((!prolog && !previous_stage && !prolog2 && !epilog) ||
!mainb->rodata_size);
assert(!epilog || !epilog->rodata_size);
r600_resource_reference(&shader->bo, NULL);
shader->bo = (struct r600_resource*)
si_aligned_buffer_create(&sscreen->b,
sscreen->cpdma_prefetch_writes_memory ?
0 : R600_RESOURCE_FLAG_READ_ONLY,
PIPE_USAGE_IMMUTABLE,
align(bo_size, SI_CPDMA_ALIGNMENT),
256);
if (!shader->bo)
return -ENOMEM;
/* Upload. */
ptr = sscreen->ws->buffer_map(shader->bo->buf, NULL,
PIPE_TRANSFER_READ_WRITE |
PIPE_TRANSFER_UNSYNCHRONIZED);
/* Don't use util_memcpy_cpu_to_le32. LLVM binaries are
* endian-independent. */
if (prolog) {
memcpy(ptr, prolog->code, prolog->code_size);
ptr += prolog->code_size;
}
if (previous_stage) {
memcpy(ptr, previous_stage->code, previous_stage->code_size);
ptr += previous_stage->code_size;
}
if (prolog2) {
memcpy(ptr, prolog2->code, prolog2->code_size);
ptr += prolog2->code_size;
}
memcpy(ptr, mainb->code, mainb->code_size);
ptr += mainb->code_size;
if (epilog)
memcpy(ptr, epilog->code, epilog->code_size);
else if (mainb->rodata_size > 0)
memcpy(ptr, mainb->rodata, mainb->rodata_size);
sscreen->ws->buffer_unmap(shader->bo->buf);
return 0;
}
static void si_shader_dump_disassembly(const struct ac_shader_binary *binary,
struct pipe_debug_callback *debug,
const char *name, FILE *file)
{
char *line, *p;
unsigned i, count;
if (binary->disasm_string) {
fprintf(file, "Shader %s disassembly:\n", name);
fprintf(file, "%s", binary->disasm_string);
if (debug && debug->debug_message) {
/* Very long debug messages are cut off, so send the
* disassembly one line at a time. This causes more
* overhead, but on the plus side it simplifies
* parsing of resulting logs.
*/
pipe_debug_message(debug, SHADER_INFO,
"Shader Disassembly Begin");
line = binary->disasm_string;
while (*line) {
p = util_strchrnul(line, '\n');
count = p - line;
if (count) {
pipe_debug_message(debug, SHADER_INFO,
"%.*s", count, line);
}
if (!*p)
break;
line = p + 1;
}
pipe_debug_message(debug, SHADER_INFO,
"Shader Disassembly End");
}
} else {
fprintf(file, "Shader %s binary:\n", name);
for (i = 0; i < binary->code_size; i += 4) {
fprintf(file, "@0x%x: %02x%02x%02x%02x\n", i,
binary->code[i + 3], binary->code[i + 2],
binary->code[i + 1], binary->code[i]);
}
}
}
static void si_shader_dump_stats(struct si_screen *sscreen,
const struct si_shader *shader,
struct pipe_debug_callback *debug,
unsigned processor,
FILE *file,
bool check_debug_option)
{
const struct si_shader_config *conf = &shader->config;
unsigned num_inputs = shader->selector ? shader->selector->info.num_inputs : 0;
unsigned code_size = si_get_shader_binary_size(shader);
unsigned lds_increment = sscreen->info.chip_class >= CIK ? 512 : 256;
unsigned lds_per_wave = 0;
unsigned max_simd_waves;
switch (sscreen->info.family) {
/* These always have 8 waves: */
case CHIP_POLARIS10:
case CHIP_POLARIS11:
case CHIP_POLARIS12:
max_simd_waves = 8;
break;
default:
max_simd_waves = 10;
}
/* Compute LDS usage for PS. */
switch (processor) {
case PIPE_SHADER_FRAGMENT:
/* The minimum usage per wave is (num_inputs * 48). The maximum
* usage is (num_inputs * 48 * 16).
* We can get anything in between and it varies between waves.
*
* The 48 bytes per input for a single primitive is equal to
* 4 bytes/component * 4 components/input * 3 points.
*
* Other stages don't know the size at compile time or don't
* allocate LDS per wave, but instead they do it per thread group.
*/
lds_per_wave = conf->lds_size * lds_increment +
align(num_inputs * 48, lds_increment);
break;
case PIPE_SHADER_COMPUTE:
if (shader->selector) {
unsigned max_workgroup_size =
si_get_max_workgroup_size(shader);
lds_per_wave = (conf->lds_size * lds_increment) /
DIV_ROUND_UP(max_workgroup_size, 64);
}
break;
}
/* Compute the per-SIMD wave counts. */
if (conf->num_sgprs) {
if (sscreen->info.chip_class >= VI)
max_simd_waves = MIN2(max_simd_waves, 800 / conf->num_sgprs);
else
max_simd_waves = MIN2(max_simd_waves, 512 / conf->num_sgprs);
}
if (conf->num_vgprs)
max_simd_waves = MIN2(max_simd_waves, 256 / conf->num_vgprs);
/* LDS is 64KB per CU (4 SIMDs), which is 16KB per SIMD (usage above
* 16KB makes some SIMDs unoccupied). */
if (lds_per_wave)
max_simd_waves = MIN2(max_simd_waves, 16384 / lds_per_wave);
if (!check_debug_option ||
si_can_dump_shader(sscreen, processor)) {
if (processor == PIPE_SHADER_FRAGMENT) {
fprintf(file, "*** SHADER CONFIG ***\n"
"SPI_PS_INPUT_ADDR = 0x%04x\n"
"SPI_PS_INPUT_ENA = 0x%04x\n",
conf->spi_ps_input_addr, conf->spi_ps_input_ena);
}
fprintf(file, "*** SHADER STATS ***\n"
"SGPRS: %d\n"
"VGPRS: %d\n"
"Spilled SGPRs: %d\n"
"Spilled VGPRs: %d\n"
"Private memory VGPRs: %d\n"
"Code Size: %d bytes\n"
"LDS: %d blocks\n"
"Scratch: %d bytes per wave\n"
"Max Waves: %d\n"
"********************\n\n\n",
conf->num_sgprs, conf->num_vgprs,
conf->spilled_sgprs, conf->spilled_vgprs,
conf->private_mem_vgprs, code_size,
conf->lds_size, conf->scratch_bytes_per_wave,
max_simd_waves);
}
pipe_debug_message(debug, SHADER_INFO,
"Shader Stats: SGPRS: %d VGPRS: %d Code Size: %d "
"LDS: %d Scratch: %d Max Waves: %d Spilled SGPRs: %d "
"Spilled VGPRs: %d PrivMem VGPRs: %d",
conf->num_sgprs, conf->num_vgprs, code_size,
conf->lds_size, conf->scratch_bytes_per_wave,
max_simd_waves, conf->spilled_sgprs,
conf->spilled_vgprs, conf->private_mem_vgprs);
}
const char *si_get_shader_name(const struct si_shader *shader, unsigned processor)
{
switch (processor) {
case PIPE_SHADER_VERTEX:
if (shader->key.as_es)
return "Vertex Shader as ES";
else if (shader->key.as_ls)
return "Vertex Shader as LS";
else
return "Vertex Shader as VS";
case PIPE_SHADER_TESS_CTRL:
return "Tessellation Control Shader";
case PIPE_SHADER_TESS_EVAL:
if (shader->key.as_es)
return "Tessellation Evaluation Shader as ES";
else
return "Tessellation Evaluation Shader as VS";
case PIPE_SHADER_GEOMETRY:
if (shader->is_gs_copy_shader)
return "GS Copy Shader as VS";
else
return "Geometry Shader";
case PIPE_SHADER_FRAGMENT:
return "Pixel Shader";
case PIPE_SHADER_COMPUTE:
return "Compute Shader";
default:
return "Unknown Shader";
}
}
void si_shader_dump(struct si_screen *sscreen, const struct si_shader *shader,
struct pipe_debug_callback *debug, unsigned processor,
FILE *file, bool check_debug_option)
{
if (!check_debug_option ||
si_can_dump_shader(sscreen, processor))
si_dump_shader_key(processor, shader, file);
if (!check_debug_option && shader->binary.llvm_ir_string) {
if (shader->previous_stage &&
shader->previous_stage->binary.llvm_ir_string) {
fprintf(file, "\n%s - previous stage - LLVM IR:\n\n",
si_get_shader_name(shader, processor));
fprintf(file, "%s\n", shader->previous_stage->binary.llvm_ir_string);
}
fprintf(file, "\n%s - main shader part - LLVM IR:\n\n",
si_get_shader_name(shader, processor));
fprintf(file, "%s\n", shader->binary.llvm_ir_string);
}
if (!check_debug_option ||
(si_can_dump_shader(sscreen, processor) &&
!(sscreen->debug_flags & DBG(NO_ASM)))) {
fprintf(file, "\n%s:\n", si_get_shader_name(shader, processor));
if (shader->prolog)
si_shader_dump_disassembly(&shader->prolog->binary,
debug, "prolog", file);
if (shader->previous_stage)
si_shader_dump_disassembly(&shader->previous_stage->binary,
debug, "previous stage", file);
if (shader->prolog2)
si_shader_dump_disassembly(&shader->prolog2->binary,
debug, "prolog2", file);
si_shader_dump_disassembly(&shader->binary, debug, "main", file);
if (shader->epilog)
si_shader_dump_disassembly(&shader->epilog->binary,
debug, "epilog", file);
fprintf(file, "\n");
}
si_shader_dump_stats(sscreen, shader, debug, processor, file,
check_debug_option);
}
static int si_compile_llvm(struct si_screen *sscreen,
struct ac_shader_binary *binary,
struct si_shader_config *conf,
LLVMTargetMachineRef tm,
LLVMModuleRef mod,
struct pipe_debug_callback *debug,
unsigned processor,
const char *name)
{
int r = 0;
unsigned count = p_atomic_inc_return(&sscreen->num_compilations);
if (si_can_dump_shader(sscreen, processor)) {
fprintf(stderr, "radeonsi: Compiling shader %d\n", count);
if (!(sscreen->debug_flags & (DBG(NO_IR) | DBG(PREOPT_IR)))) {
fprintf(stderr, "%s LLVM IR:\n\n", name);
ac_dump_module(mod);
fprintf(stderr, "\n");
}
}
if (sscreen->record_llvm_ir) {
char *ir = LLVMPrintModuleToString(mod);
binary->llvm_ir_string = strdup(ir);
LLVMDisposeMessage(ir);
}
if (!si_replace_shader(count, binary)) {
r = si_llvm_compile(mod, binary, tm, debug);
if (r)
return r;
}
si_shader_binary_read_config(binary, conf, 0);
/* Enable 64-bit and 16-bit denormals, because there is no performance
* cost.
*
* If denormals are enabled, all floating-point output modifiers are
* ignored.
*
* Don't enable denormals for 32-bit floats, because:
* - Floating-point output modifiers would be ignored by the hw.
* - Some opcodes don't support denormals, such as v_mad_f32. We would
* have to stop using those.
* - SI & CI would be very slow.
*/
conf->float_mode |= V_00B028_FP_64_DENORMS;
FREE(binary->config);
FREE(binary->global_symbol_offsets);
binary->config = NULL;
binary->global_symbol_offsets = NULL;
/* Some shaders can't have rodata because their binaries can be
* concatenated.
*/
if (binary->rodata_size &&
(processor == PIPE_SHADER_VERTEX ||
processor == PIPE_SHADER_TESS_CTRL ||
processor == PIPE_SHADER_TESS_EVAL ||
processor == PIPE_SHADER_FRAGMENT)) {
fprintf(stderr, "radeonsi: The shader can't have rodata.");
return -EINVAL;
}
return r;
}
static void si_llvm_build_ret(struct si_shader_context *ctx, LLVMValueRef ret)
{
if (LLVMGetTypeKind(LLVMTypeOf(ret)) == LLVMVoidTypeKind)
LLVMBuildRetVoid(ctx->ac.builder);
else
LLVMBuildRet(ctx->ac.builder, ret);
}
/* Generate code for the hardware VS shader stage to go with a geometry shader */
struct si_shader *
si_generate_gs_copy_shader(struct si_screen *sscreen,
LLVMTargetMachineRef tm,
struct si_shader_selector *gs_selector,
struct pipe_debug_callback *debug)
{
struct si_shader_context ctx;
struct si_shader *shader;
LLVMBuilderRef builder;
struct lp_build_tgsi_context *bld_base = &ctx.bld_base;
struct lp_build_context *uint = &bld_base->uint_bld;
struct si_shader_output_values *outputs;
struct tgsi_shader_info *gsinfo = &gs_selector->info;
int i, r;
outputs = MALLOC(gsinfo->num_outputs * sizeof(outputs[0]));
if (!outputs)
return NULL;
shader = CALLOC_STRUCT(si_shader);
if (!shader) {
FREE(outputs);
return NULL;
}
/* We can leave the fence as permanently signaled because the GS copy
* shader only becomes visible globally after it has been compiled. */
util_queue_fence_init(&shader->ready);
shader->selector = gs_selector;
shader->is_gs_copy_shader = true;
si_init_shader_ctx(&ctx, sscreen, tm);
ctx.shader = shader;
ctx.type = PIPE_SHADER_VERTEX;
builder = ctx.ac.builder;
create_function(&ctx);
preload_ring_buffers(&ctx);
LLVMValueRef voffset =
lp_build_mul_imm(uint, ctx.abi.vertex_id, 4);
/* Fetch the vertex stream ID.*/
LLVMValueRef stream_id;
if (gs_selector->so.num_outputs)
stream_id = unpack_param(&ctx, ctx.param_streamout_config, 24, 2);
else
stream_id = ctx.i32_0;
/* Fill in output information. */
for (i = 0; i < gsinfo->num_outputs; ++i) {
outputs[i].semantic_name = gsinfo->output_semantic_name[i];
outputs[i].semantic_index = gsinfo->output_semantic_index[i];
for (int chan = 0; chan < 4; chan++) {
outputs[i].vertex_stream[chan] =
(gsinfo->output_streams[i] >> (2 * chan)) & 3;
}
}
LLVMBasicBlockRef end_bb;
LLVMValueRef switch_inst;
end_bb = LLVMAppendBasicBlockInContext(ctx.ac.context, ctx.main_fn, "end");
switch_inst = LLVMBuildSwitch(builder, stream_id, end_bb, 4);
for (int stream = 0; stream < 4; stream++) {
LLVMBasicBlockRef bb;
unsigned offset;
if (!gsinfo->num_stream_output_components[stream])
continue;
if (stream > 0 && !gs_selector->so.num_outputs)
continue;
bb = LLVMInsertBasicBlockInContext(ctx.ac.context, end_bb, "out");
LLVMAddCase(switch_inst, LLVMConstInt(ctx.i32, stream, 0), bb);
LLVMPositionBuilderAtEnd(builder, bb);
/* Fetch vertex data from GSVS ring */
offset = 0;
for (i = 0; i < gsinfo->num_outputs; ++i) {
for (unsigned chan = 0; chan < 4; chan++) {
if (!(gsinfo->output_usagemask[i] & (1 << chan)) ||
outputs[i].vertex_stream[chan] != stream) {
outputs[i].values[chan] = ctx.bld_base.base.undef;
continue;
}
LLVMValueRef soffset = LLVMConstInt(ctx.i32,
offset * gs_selector->gs_max_out_vertices * 16 * 4, 0);
offset++;
outputs[i].values[chan] =
ac_build_buffer_load(&ctx.ac,
ctx.gsvs_ring[0], 1,
ctx.i32_0, voffset,
soffset, 0, 1, 1,
true, false);
}
}
/* Streamout and exports. */
if (gs_selector->so.num_outputs) {
si_llvm_emit_streamout(&ctx, outputs,
gsinfo->num_outputs,
stream);
}
if (stream == 0)
si_llvm_export_vs(&ctx, outputs, gsinfo->num_outputs);
LLVMBuildBr(builder, end_bb);
}
LLVMPositionBuilderAtEnd(builder, end_bb);
LLVMBuildRetVoid(ctx.ac.builder);
ctx.type = PIPE_SHADER_GEOMETRY; /* override for shader dumping */
si_llvm_optimize_module(&ctx);
r = si_compile_llvm(sscreen, &ctx.shader->binary,
&ctx.shader->config, ctx.tm,
ctx.gallivm.module,
debug, PIPE_SHADER_GEOMETRY,
"GS Copy Shader");
if (!r) {
if (si_can_dump_shader(sscreen, PIPE_SHADER_GEOMETRY))
fprintf(stderr, "GS Copy Shader:\n");
si_shader_dump(sscreen, ctx.shader, debug,
PIPE_SHADER_GEOMETRY, stderr, true);
r = si_shader_binary_upload(sscreen, ctx.shader);
}
si_llvm_dispose(&ctx);
FREE(outputs);
if (r != 0) {
FREE(shader);
shader = NULL;
}
return shader;
}
static void si_dump_shader_key_vs(const struct si_shader_key *key,
const struct si_vs_prolog_bits *prolog,
const char *prefix, FILE *f)
{
fprintf(f, " %s.instance_divisor_is_one = %u\n",
prefix, prolog->instance_divisor_is_one);
fprintf(f, " %s.instance_divisor_is_fetched = %u\n",
prefix, prolog->instance_divisor_is_fetched);
fprintf(f, " %s.ls_vgpr_fix = %u\n",
prefix, prolog->ls_vgpr_fix);
fprintf(f, " mono.vs.fix_fetch = {");
for (int i = 0; i < SI_MAX_ATTRIBS; i++)
fprintf(f, !i ? "%u" : ", %u", key->mono.vs_fix_fetch[i]);
fprintf(f, "}\n");
}
static void si_dump_shader_key(unsigned processor, const struct si_shader *shader,
FILE *f)
{
const struct si_shader_key *key = &shader->key;
fprintf(f, "SHADER KEY\n");
switch (processor) {
case PIPE_SHADER_VERTEX:
si_dump_shader_key_vs(key, &key->part.vs.prolog,
"part.vs.prolog", f);
fprintf(f, " as_es = %u\n", key->as_es);
fprintf(f, " as_ls = %u\n", key->as_ls);
fprintf(f, " mono.u.vs_export_prim_id = %u\n",
key->mono.u.vs_export_prim_id);
break;
case PIPE_SHADER_TESS_CTRL:
if (shader->selector->screen->info.chip_class >= GFX9) {
si_dump_shader_key_vs(key, &key->part.tcs.ls_prolog,
"part.tcs.ls_prolog", f);
}
fprintf(f, " part.tcs.epilog.prim_mode = %u\n", key->part.tcs.epilog.prim_mode);
fprintf(f, " mono.u.ff_tcs_inputs_to_copy = 0x%"PRIx64"\n", key->mono.u.ff_tcs_inputs_to_copy);
break;
case PIPE_SHADER_TESS_EVAL:
fprintf(f, " as_es = %u\n", key->as_es);
fprintf(f, " mono.u.vs_export_prim_id = %u\n",
key->mono.u.vs_export_prim_id);
break;
case PIPE_SHADER_GEOMETRY:
if (shader->is_gs_copy_shader)
break;
if (shader->selector->screen->info.chip_class >= GFX9 &&
key->part.gs.es->type == PIPE_SHADER_VERTEX) {
si_dump_shader_key_vs(key, &key->part.gs.vs_prolog,
"part.gs.vs_prolog", f);
}
fprintf(f, " part.gs.prolog.tri_strip_adj_fix = %u\n", key->part.gs.prolog.tri_strip_adj_fix);
break;
case PIPE_SHADER_COMPUTE:
break;
case PIPE_SHADER_FRAGMENT:
fprintf(f, " part.ps.prolog.color_two_side = %u\n", key->part.ps.prolog.color_two_side);
fprintf(f, " part.ps.prolog.flatshade_colors = %u\n", key->part.ps.prolog.flatshade_colors);
fprintf(f, " part.ps.prolog.poly_stipple = %u\n", key->part.ps.prolog.poly_stipple);
fprintf(f, " part.ps.prolog.force_persp_sample_interp = %u\n", key->part.ps.prolog.force_persp_sample_interp);
fprintf(f, " part.ps.prolog.force_linear_sample_interp = %u\n", key->part.ps.prolog.force_linear_sample_interp);
fprintf(f, " part.ps.prolog.force_persp_center_interp = %u\n", key->part.ps.prolog.force_persp_center_interp);
fprintf(f, " part.ps.prolog.force_linear_center_interp = %u\n", key->part.ps.prolog.force_linear_center_interp);
fprintf(f, " part.ps.prolog.bc_optimize_for_persp = %u\n", key->part.ps.prolog.bc_optimize_for_persp);
fprintf(f, " part.ps.prolog.bc_optimize_for_linear = %u\n", key->part.ps.prolog.bc_optimize_for_linear);
fprintf(f, " part.ps.epilog.spi_shader_col_format = 0x%x\n", key->part.ps.epilog.spi_shader_col_format);
fprintf(f, " part.ps.epilog.color_is_int8 = 0x%X\n", key->part.ps.epilog.color_is_int8);
fprintf(f, " part.ps.epilog.color_is_int10 = 0x%X\n", key->part.ps.epilog.color_is_int10);
fprintf(f, " part.ps.epilog.last_cbuf = %u\n", key->part.ps.epilog.last_cbuf);
fprintf(f, " part.ps.epilog.alpha_func = %u\n", key->part.ps.epilog.alpha_func);
fprintf(f, " part.ps.epilog.alpha_to_one = %u\n", key->part.ps.epilog.alpha_to_one);
fprintf(f, " part.ps.epilog.poly_line_smoothing = %u\n", key->part.ps.epilog.poly_line_smoothing);
fprintf(f, " part.ps.epilog.clamp_color = %u\n", key->part.ps.epilog.clamp_color);
break;
default:
assert(0);
}
if ((processor == PIPE_SHADER_GEOMETRY ||
processor == PIPE_SHADER_TESS_EVAL ||
processor == PIPE_SHADER_VERTEX) &&
!key->as_es && !key->as_ls) {
fprintf(f, " opt.kill_outputs = 0x%"PRIx64"\n", key->opt.kill_outputs);
fprintf(f, " opt.clip_disable = %u\n", key->opt.clip_disable);
}
}
static void si_init_shader_ctx(struct si_shader_context *ctx,
struct si_screen *sscreen,
LLVMTargetMachineRef tm)
{
struct lp_build_tgsi_context *bld_base;
si_llvm_context_init(ctx, sscreen, tm);
bld_base = &ctx->bld_base;
bld_base->emit_fetch_funcs[TGSI_FILE_CONSTANT] = fetch_constant;
bld_base->op_actions[TGSI_OPCODE_INTERP_CENTROID] = interp_action;
bld_base->op_actions[TGSI_OPCODE_INTERP_SAMPLE] = interp_action;
bld_base->op_actions[TGSI_OPCODE_INTERP_OFFSET] = interp_action;
bld_base->op_actions[TGSI_OPCODE_MEMBAR].emit = membar_emit;
bld_base->op_actions[TGSI_OPCODE_CLOCK].emit = clock_emit;
bld_base->op_actions[TGSI_OPCODE_DDX].emit = si_llvm_emit_ddxy;
bld_base->op_actions[TGSI_OPCODE_DDY].emit = si_llvm_emit_ddxy;
bld_base->op_actions[TGSI_OPCODE_DDX_FINE].emit = si_llvm_emit_ddxy;
bld_base->op_actions[TGSI_OPCODE_DDY_FINE].emit = si_llvm_emit_ddxy;
bld_base->op_actions[TGSI_OPCODE_VOTE_ALL].emit = vote_all_emit;
bld_base->op_actions[TGSI_OPCODE_VOTE_ANY].emit = vote_any_emit;
bld_base->op_actions[TGSI_OPCODE_VOTE_EQ].emit = vote_eq_emit;
bld_base->op_actions[TGSI_OPCODE_BALLOT].emit = ballot_emit;
bld_base->op_actions[TGSI_OPCODE_READ_FIRST].intr_name = "llvm.amdgcn.readfirstlane";
bld_base->op_actions[TGSI_OPCODE_READ_FIRST].emit = read_lane_emit;
bld_base->op_actions[TGSI_OPCODE_READ_INVOC].intr_name = "llvm.amdgcn.readlane";
bld_base->op_actions[TGSI_OPCODE_READ_INVOC].fetch_args = read_invoc_fetch_args;
bld_base->op_actions[TGSI_OPCODE_READ_INVOC].emit = read_lane_emit;
bld_base->op_actions[TGSI_OPCODE_EMIT].emit = si_tgsi_emit_vertex;
bld_base->op_actions[TGSI_OPCODE_ENDPRIM].emit = si_tgsi_emit_primitive;
bld_base->op_actions[TGSI_OPCODE_BARRIER].emit = si_llvm_emit_barrier;
}
static void si_optimize_vs_outputs(struct si_shader_context *ctx)
{
struct si_shader *shader = ctx->shader;
struct tgsi_shader_info *info = &shader->selector->info;
if ((ctx->type != PIPE_SHADER_VERTEX &&
ctx->type != PIPE_SHADER_TESS_EVAL) ||
shader->key.as_ls ||
shader->key.as_es)
return;
ac_optimize_vs_outputs(&ctx->ac,
ctx->main_fn,
shader->info.vs_output_param_offset,
info->num_outputs,
&shader->info.nr_param_exports);
}
static void si_count_scratch_private_memory(struct si_shader_context *ctx)
{
ctx->shader->config.private_mem_vgprs = 0;
/* Process all LLVM instructions. */
LLVMBasicBlockRef bb = LLVMGetFirstBasicBlock(ctx->main_fn);
while (bb) {
LLVMValueRef next = LLVMGetFirstInstruction(bb);
while (next) {
LLVMValueRef inst = next;
next = LLVMGetNextInstruction(next);
if (LLVMGetInstructionOpcode(inst) != LLVMAlloca)
continue;
LLVMTypeRef type = LLVMGetElementType(LLVMTypeOf(inst));
/* No idea why LLVM aligns allocas to 4 elements. */
unsigned alignment = LLVMGetAlignment(inst);
unsigned dw_size = align(ac_get_type_size(type) / 4, alignment);
ctx->shader->config.private_mem_vgprs += dw_size;
}
bb = LLVMGetNextBasicBlock(bb);
}
}
static void si_init_exec_from_input(struct si_shader_context *ctx,
unsigned param, unsigned bitoffset)
{
LLVMValueRef args[] = {
LLVMGetParam(ctx->main_fn, param),
LLVMConstInt(ctx->i32, bitoffset, 0),
};
lp_build_intrinsic(ctx->ac.builder,
"llvm.amdgcn.init.exec.from.input",
ctx->voidt, args, 2, LP_FUNC_ATTR_CONVERGENT);
}
static bool si_vs_needs_prolog(const struct si_shader_selector *sel,
const struct si_vs_prolog_bits *key)
{
/* VGPR initialization fixup for Vega10 and Raven is always done in the
* VS prolog. */
return sel->vs_needs_prolog || key->ls_vgpr_fix;
}
static bool si_compile_tgsi_main(struct si_shader_context *ctx,
bool is_monolithic)
{
struct si_shader *shader = ctx->shader;
struct si_shader_selector *sel = shader->selector;
struct lp_build_tgsi_context *bld_base = &ctx->bld_base;
// TODO clean all this up!
switch (ctx->type) {
case PIPE_SHADER_VERTEX:
ctx->load_input = declare_input_vs;
if (shader->key.as_ls)
ctx->abi.emit_outputs = si_llvm_emit_ls_epilogue;
else if (shader->key.as_es)
ctx->abi.emit_outputs = si_llvm_emit_es_epilogue;
else
ctx->abi.emit_outputs = si_llvm_emit_vs_epilogue;
bld_base->emit_epilogue = si_tgsi_emit_epilogue;
break;
case PIPE_SHADER_TESS_CTRL:
bld_base->emit_fetch_funcs[TGSI_FILE_INPUT] = fetch_input_tcs;
ctx->abi.load_tess_varyings = si_nir_load_tcs_varyings;
bld_base->emit_fetch_funcs[TGSI_FILE_OUTPUT] = fetch_output_tcs;
bld_base->emit_store = store_output_tcs;
ctx->abi.store_tcs_outputs = si_nir_store_output_tcs;
ctx->abi.emit_outputs = si_llvm_emit_tcs_epilogue;
ctx->abi.load_patch_vertices_in = si_load_patch_vertices_in;
bld_base->emit_epilogue = si_tgsi_emit_epilogue;
break;
case PIPE_SHADER_TESS_EVAL:
bld_base->emit_fetch_funcs[TGSI_FILE_INPUT] = fetch_input_tes;
ctx->abi.load_tess_varyings = si_nir_load_input_tes;
ctx->abi.load_tess_coord = si_load_tess_coord;
ctx->abi.load_tess_level = si_load_tess_level;
ctx->abi.load_patch_vertices_in = si_load_patch_vertices_in;
if (shader->key.as_es)
ctx->abi.emit_outputs = si_llvm_emit_es_epilogue;
else
ctx->abi.emit_outputs = si_llvm_emit_vs_epilogue;
bld_base->emit_epilogue = si_tgsi_emit_epilogue;
break;
case PIPE_SHADER_GEOMETRY:
bld_base->emit_fetch_funcs[TGSI_FILE_INPUT] = fetch_input_gs;
ctx->abi.load_inputs = si_nir_load_input_gs;
ctx->abi.emit_vertex = si_llvm_emit_vertex;
ctx->abi.emit_primitive = si_llvm_emit_primitive;
ctx->abi.emit_outputs = si_llvm_emit_gs_epilogue;
bld_base->emit_epilogue = si_tgsi_emit_gs_epilogue;
break;
case PIPE_SHADER_FRAGMENT:
ctx->load_input = declare_input_fs;
ctx->abi.emit_outputs = si_llvm_return_fs_outputs;
bld_base->emit_epilogue = si_tgsi_emit_epilogue;
break;
case PIPE_SHADER_COMPUTE:
break;
default:
assert(!"Unsupported shader type");
return false;
}
ctx->abi.load_ubo = load_ubo;
ctx->abi.load_ssbo = load_ssbo;
create_function(ctx);
preload_ring_buffers(ctx);
/* For GFX9 merged shaders:
* - Set EXEC for the first shader. If the prolog is present, set
* EXEC there instead.
* - Add a barrier before the second shader.
* - In the second shader, reset EXEC to ~0 and wrap the main part in
* an if-statement. This is required for correctness in geometry
* shaders, to ensure that empty GS waves do not send GS_EMIT and
* GS_CUT messages.
*
* For monolithic merged shaders, the first shader is wrapped in an
* if-block together with its prolog in si_build_wrapper_function.
*/
if (ctx->screen->info.chip_class >= GFX9) {
if (!is_monolithic &&
sel->info.num_instructions > 1 && /* not empty shader */
(shader->key.as_es || shader->key.as_ls) &&
(ctx->type == PIPE_SHADER_TESS_EVAL ||
(ctx->type == PIPE_SHADER_VERTEX &&
!si_vs_needs_prolog(sel, &shader->key.part.vs.prolog)))) {
si_init_exec_from_input(ctx,
ctx->param_merged_wave_info, 0);
} else if (ctx->type == PIPE_SHADER_TESS_CTRL ||
ctx->type == PIPE_SHADER_GEOMETRY) {
if (!is_monolithic)
ac_init_exec_full_mask(&ctx->ac);
/* The barrier must execute for all shaders in a
* threadgroup.
*/
si_llvm_emit_barrier(NULL, bld_base, NULL);
LLVMValueRef num_threads = unpack_param(ctx, ctx->param_merged_wave_info, 8, 8);
LLVMValueRef ena =
LLVMBuildICmp(ctx->ac.builder, LLVMIntULT,
ac_get_thread_id(&ctx->ac), num_threads, "");
lp_build_if(&ctx->merged_wrap_if_state, &ctx->gallivm, ena);
}
}
if (ctx->type == PIPE_SHADER_TESS_CTRL &&
sel->tcs_info.tessfactors_are_def_in_all_invocs) {
for (unsigned i = 0; i < 6; i++) {
ctx->invoc0_tess_factors[i] =
lp_build_alloca_undef(&ctx->gallivm, ctx->i32, "");
}
}
if (ctx->type == PIPE_SHADER_GEOMETRY) {
int i;
for (i = 0; i < 4; i++) {
ctx->gs_next_vertex[i] =
lp_build_alloca(&ctx->gallivm,
ctx->i32, "");
}
}
if (sel->force_correct_derivs_after_kill) {
ctx->postponed_kill = lp_build_alloca_undef(&ctx->gallivm, ctx->i1, "");
/* true = don't kill. */
LLVMBuildStore(ctx->ac.builder, LLVMConstInt(ctx->i1, 1, 0),
ctx->postponed_kill);
}
if (sel->tokens) {
if (!lp_build_tgsi_llvm(bld_base, sel->tokens)) {
fprintf(stderr, "Failed to translate shader from TGSI to LLVM\n");
return false;
}
} else {
if (!si_nir_build_llvm(ctx, sel->nir)) {
fprintf(stderr, "Failed to translate shader from NIR to LLVM\n");
return false;
}
}
si_llvm_build_ret(ctx, ctx->return_value);
return true;
}
/**
* Compute the VS prolog key, which contains all the information needed to
* build the VS prolog function, and set shader->info bits where needed.
*
* \param info Shader info of the vertex shader.
* \param num_input_sgprs Number of input SGPRs for the vertex shader.
* \param prolog_key Key of the VS prolog
* \param shader_out The vertex shader, or the next shader if merging LS+HS or ES+GS.
* \param key Output shader part key.
*/
static void si_get_vs_prolog_key(const struct tgsi_shader_info *info,
unsigned num_input_sgprs,
const struct si_vs_prolog_bits *prolog_key,
struct si_shader *shader_out,
union si_shader_part_key *key)
{
memset(key, 0, sizeof(*key));
key->vs_prolog.states = *prolog_key;
key->vs_prolog.num_input_sgprs = num_input_sgprs;
key->vs_prolog.last_input = MAX2(1, info->num_inputs) - 1;
key->vs_prolog.as_ls = shader_out->key.as_ls;
key->vs_prolog.as_es = shader_out->key.as_es;
if (shader_out->selector->type == PIPE_SHADER_TESS_CTRL) {
key->vs_prolog.as_ls = 1;
key->vs_prolog.num_merged_next_stage_vgprs = 2;
} else if (shader_out->selector->type == PIPE_SHADER_GEOMETRY) {
key->vs_prolog.as_es = 1;
key->vs_prolog.num_merged_next_stage_vgprs = 5;
}
/* Enable loading the InstanceID VGPR. */
uint16_t input_mask = u_bit_consecutive(0, info->num_inputs);
if ((key->vs_prolog.states.instance_divisor_is_one |
key->vs_prolog.states.instance_divisor_is_fetched) & input_mask)
shader_out->info.uses_instanceid = true;
}
/**
* Compute the PS prolog key, which contains all the information needed to
* build the PS prolog function, and set related bits in shader->config.
*/
static void si_get_ps_prolog_key(struct si_shader *shader,
union si_shader_part_key *key,
bool separate_prolog)
{
struct tgsi_shader_info *info = &shader->selector->info;
memset(key, 0, sizeof(*key));
key->ps_prolog.states = shader->key.part.ps.prolog;
key->ps_prolog.colors_read = info->colors_read;
key->ps_prolog.num_input_sgprs = shader->info.num_input_sgprs;
key->ps_prolog.num_input_vgprs = shader->info.num_input_vgprs;
key->ps_prolog.wqm = info->uses_derivatives &&
(key->ps_prolog.colors_read ||
key->ps_prolog.states.force_persp_sample_interp ||
key->ps_prolog.states.force_linear_sample_interp ||
key->ps_prolog.states.force_persp_center_interp ||
key->ps_prolog.states.force_linear_center_interp ||
key->ps_prolog.states.bc_optimize_for_persp ||
key->ps_prolog.states.bc_optimize_for_linear);
key->ps_prolog.ancillary_vgpr_index = shader->info.ancillary_vgpr_index;
if (info->colors_read) {
unsigned *color = shader->selector->color_attr_index;
if (shader->key.part.ps.prolog.color_two_side) {
/* BCOLORs are stored after the last input. */
key->ps_prolog.num_interp_inputs = info->num_inputs;
key->ps_prolog.face_vgpr_index = shader->info.face_vgpr_index;
shader->config.spi_ps_input_ena |= S_0286CC_FRONT_FACE_ENA(1);
}
for (unsigned i = 0; i < 2; i++) {
unsigned interp = info->input_interpolate[color[i]];
unsigned location = info->input_interpolate_loc[color[i]];
if (!(info->colors_read & (0xf << i*4)))
continue;
key->ps_prolog.color_attr_index[i] = color[i];
if (shader->key.part.ps.prolog.flatshade_colors &&
interp == TGSI_INTERPOLATE_COLOR)
interp = TGSI_INTERPOLATE_CONSTANT;
switch (interp) {
case TGSI_INTERPOLATE_CONSTANT:
key->ps_prolog.color_interp_vgpr_index[i] = -1;
break;
case TGSI_INTERPOLATE_PERSPECTIVE:
case TGSI_INTERPOLATE_COLOR:
/* Force the interpolation location for colors here. */
if (shader->key.part.ps.prolog.force_persp_sample_interp)
location = TGSI_INTERPOLATE_LOC_SAMPLE;
if (shader->key.part.ps.prolog.force_persp_center_interp)
location = TGSI_INTERPOLATE_LOC_CENTER;
switch (location) {
case TGSI_INTERPOLATE_LOC_SAMPLE:
key->ps_prolog.color_interp_vgpr_index[i] = 0;
shader->config.spi_ps_input_ena |=
S_0286CC_PERSP_SAMPLE_ENA(1);
break;
case TGSI_INTERPOLATE_LOC_CENTER:
key->ps_prolog.color_interp_vgpr_index[i] = 2;
shader->config.spi_ps_input_ena |=
S_0286CC_PERSP_CENTER_ENA(1);
break;
case TGSI_INTERPOLATE_LOC_CENTROID:
key->ps_prolog.color_interp_vgpr_index[i] = 4;
shader->config.spi_ps_input_ena |=
S_0286CC_PERSP_CENTROID_ENA(1);
break;
default:
assert(0);
}
break;
case TGSI_INTERPOLATE_LINEAR:
/* Force the interpolation location for colors here. */
if (shader->key.part.ps.prolog.force_linear_sample_interp)
location = TGSI_INTERPOLATE_LOC_SAMPLE;
if (shader->key.part.ps.prolog.force_linear_center_interp)
location = TGSI_INTERPOLATE_LOC_CENTER;
/* The VGPR assignment for non-monolithic shaders
* works because InitialPSInputAddr is set on the
* main shader and PERSP_PULL_MODEL is never used.
*/
switch (location) {
case TGSI_INTERPOLATE_LOC_SAMPLE:
key->ps_prolog.color_interp_vgpr_index[i] =
separate_prolog ? 6 : 9;
shader->config.spi_ps_input_ena |=
S_0286CC_LINEAR_SAMPLE_ENA(1);
break;
case TGSI_INTERPOLATE_LOC_CENTER:
key->ps_prolog.color_interp_vgpr_index[i] =
separate_prolog ? 8 : 11;
shader->config.spi_ps_input_ena |=
S_0286CC_LINEAR_CENTER_ENA(1);
break;
case TGSI_INTERPOLATE_LOC_CENTROID:
key->ps_prolog.color_interp_vgpr_index[i] =
separate_prolog ? 10 : 13;
shader->config.spi_ps_input_ena |=
S_0286CC_LINEAR_CENTROID_ENA(1);
break;
default:
assert(0);
}
break;
default:
assert(0);
}
}
}
}
/**
* Check whether a PS prolog is required based on the key.
*/
static bool si_need_ps_prolog(const union si_shader_part_key *key)
{
return key->ps_prolog.colors_read ||
key->ps_prolog.states.force_persp_sample_interp ||
key->ps_prolog.states.force_linear_sample_interp ||
key->ps_prolog.states.force_persp_center_interp ||
key->ps_prolog.states.force_linear_center_interp ||
key->ps_prolog.states.bc_optimize_for_persp ||
key->ps_prolog.states.bc_optimize_for_linear ||
key->ps_prolog.states.poly_stipple ||
key->ps_prolog.states.samplemask_log_ps_iter;
}
/**
* Compute the PS epilog key, which contains all the information needed to
* build the PS epilog function.
*/
static void si_get_ps_epilog_key(struct si_shader *shader,
union si_shader_part_key *key)
{
struct tgsi_shader_info *info = &shader->selector->info;
memset(key, 0, sizeof(*key));
key->ps_epilog.colors_written = info->colors_written;
key->ps_epilog.writes_z = info->writes_z;
key->ps_epilog.writes_stencil = info->writes_stencil;
key->ps_epilog.writes_samplemask = info->writes_samplemask;
key->ps_epilog.states = shader->key.part.ps.epilog;
}
/**
* Build the GS prolog function. Rotate the input vertices for triangle strips
* with adjacency.
*/
static void si_build_gs_prolog_function(struct si_shader_context *ctx,
union si_shader_part_key *key)
{
unsigned num_sgprs, num_vgprs;
struct si_function_info fninfo;
LLVMBuilderRef builder = ctx->ac.builder;
LLVMTypeRef returns[48];
LLVMValueRef func, ret;
si_init_function_info(&fninfo);
if (ctx->screen->info.chip_class >= GFX9) {
num_sgprs = 8 + GFX9_GS_NUM_USER_SGPR;
num_vgprs = 5; /* ES inputs are not needed by GS */
} else {
num_sgprs = GFX6_GS_NUM_USER_SGPR + 2;
num_vgprs = 8;
}
for (unsigned i = 0; i < num_sgprs; ++i) {
add_arg(&fninfo, ARG_SGPR, ctx->i32);
returns[i] = ctx->i32;
}
for (unsigned i = 0; i < num_vgprs; ++i) {
add_arg(&fninfo, ARG_VGPR, ctx->i32);
returns[num_sgprs + i] = ctx->f32;
}
/* Create the function. */
si_create_function(ctx, "gs_prolog", returns, num_sgprs + num_vgprs,
&fninfo, 0);
func = ctx->main_fn;
/* Set the full EXEC mask for the prolog, because we are only fiddling
* with registers here. The main shader part will set the correct EXEC
* mask.
*/
if (ctx->screen->info.chip_class >= GFX9 && !key->gs_prolog.is_monolithic)
ac_init_exec_full_mask(&ctx->ac);
/* Copy inputs to outputs. This should be no-op, as the registers match,
* but it will prevent the compiler from overwriting them unintentionally.
*/
ret = ctx->return_value;
for (unsigned i = 0; i < num_sgprs; i++) {
LLVMValueRef p = LLVMGetParam(func, i);
ret = LLVMBuildInsertValue(builder, ret, p, i, "");
}
for (unsigned i = 0; i < num_vgprs; i++) {
LLVMValueRef p = LLVMGetParam(func, num_sgprs + i);
p = ac_to_float(&ctx->ac, p);
ret = LLVMBuildInsertValue(builder, ret, p, num_sgprs + i, "");
}
if (key->gs_prolog.states.tri_strip_adj_fix) {
/* Remap the input vertices for every other primitive. */
const unsigned gfx6_vtx_params[6] = {
num_sgprs,
num_sgprs + 1,
num_sgprs + 3,
num_sgprs + 4,
num_sgprs + 5,
num_sgprs + 6
};
const unsigned gfx9_vtx_params[3] = {
num_sgprs,
num_sgprs + 1,
num_sgprs + 4,
};
LLVMValueRef vtx_in[6], vtx_out[6];
LLVMValueRef prim_id, rotate;
if (ctx->screen->info.chip_class >= GFX9) {
for (unsigned i = 0; i < 3; i++) {
vtx_in[i*2] = unpack_param(ctx, gfx9_vtx_params[i], 0, 16);
vtx_in[i*2+1] = unpack_param(ctx, gfx9_vtx_params[i], 16, 16);
}
} else {
for (unsigned i = 0; i < 6; i++)
vtx_in[i] = LLVMGetParam(func, gfx6_vtx_params[i]);
}
prim_id = LLVMGetParam(func, num_sgprs + 2);
rotate = LLVMBuildTrunc(builder, prim_id, ctx->i1, "");
for (unsigned i = 0; i < 6; ++i) {
LLVMValueRef base, rotated;
base = vtx_in[i];
rotated = vtx_in[(i + 4) % 6];
vtx_out[i] = LLVMBuildSelect(builder, rotate, rotated, base, "");
}
if (ctx->screen->info.chip_class >= GFX9) {
for (unsigned i = 0; i < 3; i++) {
LLVMValueRef hi, out;
hi = LLVMBuildShl(builder, vtx_out[i*2+1],
LLVMConstInt(ctx->i32, 16, 0), "");
out = LLVMBuildOr(builder, vtx_out[i*2], hi, "");
out = ac_to_float(&ctx->ac, out);
ret = LLVMBuildInsertValue(builder, ret, out,
gfx9_vtx_params[i], "");
}
} else {
for (unsigned i = 0; i < 6; i++) {
LLVMValueRef out;
out = ac_to_float(&ctx->ac, vtx_out[i]);
ret = LLVMBuildInsertValue(builder, ret, out,
gfx6_vtx_params[i], "");
}
}
}
LLVMBuildRet(builder, ret);
}
/**
* Given a list of shader part functions, build a wrapper function that
* runs them in sequence to form a monolithic shader.
*/
static void si_build_wrapper_function(struct si_shader_context *ctx,
LLVMValueRef *parts,
unsigned num_parts,
unsigned main_part,
unsigned next_shader_first_part)
{
LLVMBuilderRef builder = ctx->ac.builder;
/* PS epilog has one arg per color component; gfx9 merged shader
* prologs need to forward 32 user SGPRs.
*/
struct si_function_info fninfo;
LLVMValueRef initial[64], out[64];
LLVMTypeRef function_type;
unsigned num_first_params;
unsigned num_out, initial_num_out;
MAYBE_UNUSED unsigned num_out_sgpr; /* used in debug checks */
MAYBE_UNUSED unsigned initial_num_out_sgpr; /* used in debug checks */
unsigned num_sgprs, num_vgprs;
unsigned gprs;
struct lp_build_if_state if_state;
si_init_function_info(&fninfo);
for (unsigned i = 0; i < num_parts; ++i) {
lp_add_function_attr(parts[i], -1, LP_FUNC_ATTR_ALWAYSINLINE);
LLVMSetLinkage(parts[i], LLVMPrivateLinkage);
}
/* The parameters of the wrapper function correspond to those of the
* first part in terms of SGPRs and VGPRs, but we use the types of the
* main part to get the right types. This is relevant for the
* dereferenceable attribute on descriptor table pointers.
*/
num_sgprs = 0;
num_vgprs = 0;
function_type = LLVMGetElementType(LLVMTypeOf(parts[0]));
num_first_params = LLVMCountParamTypes(function_type);
for (unsigned i = 0; i < num_first_params; ++i) {
LLVMValueRef param = LLVMGetParam(parts[0], i);
if (ac_is_sgpr_param(param)) {
assert(num_vgprs == 0);
num_sgprs += ac_get_type_size(LLVMTypeOf(param)) / 4;
} else {
num_vgprs += ac_get_type_size(LLVMTypeOf(param)) / 4;
}
}
gprs = 0;
while (gprs < num_sgprs + num_vgprs) {
LLVMValueRef param = LLVMGetParam(parts[main_part], fninfo.num_params);
LLVMTypeRef type = LLVMTypeOf(param);
unsigned size = ac_get_type_size(type) / 4;
add_arg(&fninfo, gprs < num_sgprs ? ARG_SGPR : ARG_VGPR, type);
assert(ac_is_sgpr_param(param) == (gprs < num_sgprs));
assert(gprs + size <= num_sgprs + num_vgprs &&
(gprs >= num_sgprs || gprs + size <= num_sgprs));
gprs += size;
}
si_create_function(ctx, "wrapper", NULL, 0, &fninfo,
si_get_max_workgroup_size(ctx->shader));
if (is_merged_shader(ctx->shader))
ac_init_exec_full_mask(&ctx->ac);
/* Record the arguments of the function as if they were an output of
* a previous part.
*/
num_out = 0;
num_out_sgpr = 0;
for (unsigned i = 0; i < fninfo.num_params; ++i) {
LLVMValueRef param = LLVMGetParam(ctx->main_fn, i);
LLVMTypeRef param_type = LLVMTypeOf(param);
LLVMTypeRef out_type = i < fninfo.num_sgpr_params ? ctx->i32 : ctx->f32;
unsigned size = ac_get_type_size(param_type) / 4;
if (size == 1) {
if (param_type != out_type)
param = LLVMBuildBitCast(builder, param, out_type, "");
out[num_out++] = param;
} else {
LLVMTypeRef vector_type = LLVMVectorType(out_type, size);
if (LLVMGetTypeKind(param_type) == LLVMPointerTypeKind) {
param = LLVMBuildPtrToInt(builder, param, ctx->i64, "");
param_type = ctx->i64;
}
if (param_type != vector_type)
param = LLVMBuildBitCast(builder, param, vector_type, "");
for (unsigned j = 0; j < size; ++j)
out[num_out++] = LLVMBuildExtractElement(
builder, param, LLVMConstInt(ctx->i32, j, 0), "");
}
if (i < fninfo.num_sgpr_params)
num_out_sgpr = num_out;
}
memcpy(initial, out, sizeof(out));
initial_num_out = num_out;
initial_num_out_sgpr = num_out_sgpr;
/* Now chain the parts. */
for (unsigned part = 0; part < num_parts; ++part) {
LLVMValueRef in[48];
LLVMValueRef ret;
LLVMTypeRef ret_type;
unsigned out_idx = 0;
unsigned num_params = LLVMCountParams(parts[part]);
/* Merged shaders are executed conditionally depending
* on the number of enabled threads passed in the input SGPRs. */
if (is_merged_shader(ctx->shader) && part == 0) {
LLVMValueRef ena, count = initial[3];
count = LLVMBuildAnd(builder, count,
LLVMConstInt(ctx->i32, 0x7f, 0), "");
ena = LLVMBuildICmp(builder, LLVMIntULT,
ac_get_thread_id(&ctx->ac), count, "");
lp_build_if(&if_state, &ctx->gallivm, ena);
}
/* Derive arguments for the next part from outputs of the
* previous one.
*/
for (unsigned param_idx = 0; param_idx < num_params; ++param_idx) {
LLVMValueRef param;
LLVMTypeRef param_type;
bool is_sgpr;
unsigned param_size;
LLVMValueRef arg = NULL;
param = LLVMGetParam(parts[part], param_idx);
param_type = LLVMTypeOf(param);
param_size = ac_get_type_size(param_type) / 4;
is_sgpr = ac_is_sgpr_param(param);
if (is_sgpr) {
#if HAVE_LLVM < 0x0400
LLVMRemoveAttribute(param, LLVMByValAttribute);
#else
unsigned kind_id = LLVMGetEnumAttributeKindForName("byval", 5);
LLVMRemoveEnumAttributeAtIndex(parts[part], param_idx + 1, kind_id);
#endif
lp_add_function_attr(parts[part], param_idx + 1, LP_FUNC_ATTR_INREG);
}
assert(out_idx + param_size <= (is_sgpr ? num_out_sgpr : num_out));
assert(is_sgpr || out_idx >= num_out_sgpr);
if (param_size == 1)
arg = out[out_idx];
else
arg = lp_build_gather_values(&ctx->gallivm, &out[out_idx], param_size);
if (LLVMTypeOf(arg) != param_type) {
if (LLVMGetTypeKind(param_type) == LLVMPointerTypeKind) {
arg = LLVMBuildBitCast(builder, arg, ctx->i64, "");
arg = LLVMBuildIntToPtr(builder, arg, param_type, "");
} else {
arg = LLVMBuildBitCast(builder, arg, param_type, "");
}
}
in[param_idx] = arg;
out_idx += param_size;
}
ret = LLVMBuildCall(builder, parts[part], in, num_params, "");
if (is_merged_shader(ctx->shader) &&
part + 1 == next_shader_first_part) {
lp_build_endif(&if_state);
/* The second half of the merged shader should use
* the inputs from the toplevel (wrapper) function,
* not the return value from the last call.
*
* That's because the last call was executed condi-
* tionally, so we can't consume it in the main
* block.
*/
memcpy(out, initial, sizeof(initial));
num_out = initial_num_out;
num_out_sgpr = initial_num_out_sgpr;
continue;
}
/* Extract the returned GPRs. */
ret_type = LLVMTypeOf(ret);
num_out = 0;
num_out_sgpr = 0;
if (LLVMGetTypeKind(ret_type) != LLVMVoidTypeKind) {
assert(LLVMGetTypeKind(ret_type) == LLVMStructTypeKind);
unsigned ret_size = LLVMCountStructElementTypes(ret_type);
for (unsigned i = 0; i < ret_size; ++i) {
LLVMValueRef val =
LLVMBuildExtractValue(builder, ret, i, "");
assert(num_out < ARRAY_SIZE(out));
out[num_out++] = val;
if (LLVMTypeOf(val) == ctx->i32) {
assert(num_out_sgpr + 1 == num_out);
num_out_sgpr = num_out;
}
}
}
}
LLVMBuildRetVoid(builder);
}
int si_compile_tgsi_shader(struct si_screen *sscreen,
LLVMTargetMachineRef tm,
struct si_shader *shader,
bool is_monolithic,
struct pipe_debug_callback *debug)
{
struct si_shader_selector *sel = shader->selector;
struct si_shader_context ctx;
int r = -1;
/* Dump TGSI code before doing TGSI->LLVM conversion in case the
* conversion fails. */
if (si_can_dump_shader(sscreen, sel->info.processor) &&
!(sscreen->debug_flags & DBG(NO_TGSI))) {
if (sel->tokens)
tgsi_dump(sel->tokens, 0);
else
nir_print_shader(sel->nir, stderr);
si_dump_streamout(&sel->so);
}
si_init_shader_ctx(&ctx, sscreen, tm);
si_llvm_context_set_tgsi(&ctx, shader);
ctx.separate_prolog = !is_monolithic;
memset(shader->info.vs_output_param_offset, AC_EXP_PARAM_UNDEFINED,
sizeof(shader->info.vs_output_param_offset));
shader->info.uses_instanceid = sel->info.uses_instanceid;
if (!si_compile_tgsi_main(&ctx, is_monolithic)) {
si_llvm_dispose(&ctx);
return -1;
}
if (is_monolithic && ctx.type == PIPE_SHADER_VERTEX) {
LLVMValueRef parts[2];
bool need_prolog = sel->vs_needs_prolog;
parts[1] = ctx.main_fn;
if (need_prolog) {
union si_shader_part_key prolog_key;
si_get_vs_prolog_key(&sel->info,
shader->info.num_input_sgprs,
&shader->key.part.vs.prolog,
shader, &prolog_key);
si_build_vs_prolog_function(&ctx, &prolog_key);
parts[0] = ctx.main_fn;
}
si_build_wrapper_function(&ctx, parts + !need_prolog,
1 + need_prolog, need_prolog, 0);
} else if (is_monolithic && ctx.type == PIPE_SHADER_TESS_CTRL) {
if (sscreen->info.chip_class >= GFX9) {
struct si_shader_selector *ls = shader->key.part.tcs.ls;
LLVMValueRef parts[4];
bool vs_needs_prolog =
si_vs_needs_prolog(ls, &shader->key.part.tcs.ls_prolog);
/* TCS main part */
parts[2] = ctx.main_fn;
/* TCS epilog */
union si_shader_part_key tcs_epilog_key;
memset(&tcs_epilog_key, 0, sizeof(tcs_epilog_key));
tcs_epilog_key.tcs_epilog.states = shader->key.part.tcs.epilog;
si_build_tcs_epilog_function(&ctx, &tcs_epilog_key);
parts[3] = ctx.main_fn;
/* VS prolog */
if (vs_needs_prolog) {
union si_shader_part_key vs_prolog_key;
si_get_vs_prolog_key(&ls->info,
shader->info.num_input_sgprs,
&shader->key.part.tcs.ls_prolog,
shader, &vs_prolog_key);
vs_prolog_key.vs_prolog.is_monolithic = true;
si_build_vs_prolog_function(&ctx, &vs_prolog_key);
parts[0] = ctx.main_fn;
}
/* VS as LS main part */
struct si_shader shader_ls = {};
shader_ls.selector = ls;
shader_ls.key.as_ls = 1;
shader_ls.key.mono = shader->key.mono;
shader_ls.key.opt = shader->key.opt;
si_llvm_context_set_tgsi(&ctx, &shader_ls);
if (!si_compile_tgsi_main(&ctx, true)) {
si_llvm_dispose(&ctx);
return -1;
}
shader->info.uses_instanceid |= ls->info.uses_instanceid;
parts[1] = ctx.main_fn;
/* Reset the shader context. */
ctx.shader = shader;
ctx.type = PIPE_SHADER_TESS_CTRL;
si_build_wrapper_function(&ctx,
parts + !vs_needs_prolog,
4 - !vs_needs_prolog, 0,
vs_needs_prolog ? 2 : 1);
} else {
LLVMValueRef parts[2];
union si_shader_part_key epilog_key;
parts[0] = ctx.main_fn;
memset(&epilog_key, 0, sizeof(epilog_key));
epilog_key.tcs_epilog.states = shader->key.part.tcs.epilog;
si_build_tcs_epilog_function(&ctx, &epilog_key);
parts[1] = ctx.main_fn;
si_build_wrapper_function(&ctx, parts, 2, 0, 0);
}
} else if (is_monolithic && ctx.type == PIPE_SHADER_GEOMETRY) {
if (ctx.screen->info.chip_class >= GFX9) {
struct si_shader_selector *es = shader->key.part.gs.es;
LLVMValueRef es_prolog = NULL;
LLVMValueRef es_main = NULL;
LLVMValueRef gs_prolog = NULL;
LLVMValueRef gs_main = ctx.main_fn;
/* GS prolog */
union si_shader_part_key gs_prolog_key;
memset(&gs_prolog_key, 0, sizeof(gs_prolog_key));
gs_prolog_key.gs_prolog.states = shader->key.part.gs.prolog;
gs_prolog_key.gs_prolog.is_monolithic = true;
si_build_gs_prolog_function(&ctx, &gs_prolog_key);
gs_prolog = ctx.main_fn;
/* ES prolog */
if (es->vs_needs_prolog) {
union si_shader_part_key vs_prolog_key;
si_get_vs_prolog_key(&es->info,
shader->info.num_input_sgprs,
&shader->key.part.gs.vs_prolog,
shader, &vs_prolog_key);
vs_prolog_key.vs_prolog.is_monolithic = true;
si_build_vs_prolog_function(&ctx, &vs_prolog_key);
es_prolog = ctx.main_fn;
}
/* ES main part */
struct si_shader shader_es = {};
shader_es.selector = es;
shader_es.key.as_es = 1;
shader_es.key.mono = shader->key.mono;
shader_es.key.opt = shader->key.opt;
si_llvm_context_set_tgsi(&ctx, &shader_es);
if (!si_compile_tgsi_main(&ctx, true)) {
si_llvm_dispose(&ctx);
return -1;
}
shader->info.uses_instanceid |= es->info.uses_instanceid;
es_main = ctx.main_fn;
/* Reset the shader context. */
ctx.shader = shader;
ctx.type = PIPE_SHADER_GEOMETRY;
/* Prepare the array of shader parts. */
LLVMValueRef parts[4];
unsigned num_parts = 0, main_part, next_first_part;
if (es_prolog)
parts[num_parts++] = es_prolog;
parts[main_part = num_parts++] = es_main;
parts[next_first_part = num_parts++] = gs_prolog;
parts[num_parts++] = gs_main;
si_build_wrapper_function(&ctx, parts, num_parts,
main_part, next_first_part);
} else {
LLVMValueRef parts[2];
union si_shader_part_key prolog_key;
parts[1] = ctx.main_fn;
memset(&prolog_key, 0, sizeof(prolog_key));
prolog_key.gs_prolog.states = shader->key.part.gs.prolog;
si_build_gs_prolog_function(&ctx, &prolog_key);
parts[0] = ctx.main_fn;
si_build_wrapper_function(&ctx, parts, 2, 1, 0);
}
} else if (is_monolithic && ctx.type == PIPE_SHADER_FRAGMENT) {
LLVMValueRef parts[3];
union si_shader_part_key prolog_key;
union si_shader_part_key epilog_key;
bool need_prolog;
si_get_ps_prolog_key(shader, &prolog_key, false);
need_prolog = si_need_ps_prolog(&prolog_key);
parts[need_prolog ? 1 : 0] = ctx.main_fn;
if (need_prolog) {
si_build_ps_prolog_function(&ctx, &prolog_key);
parts[0] = ctx.main_fn;
}
si_get_ps_epilog_key(shader, &epilog_key);
si_build_ps_epilog_function(&ctx, &epilog_key);
parts[need_prolog ? 2 : 1] = ctx.main_fn;
si_build_wrapper_function(&ctx, parts, need_prolog ? 3 : 2,
need_prolog ? 1 : 0, 0);
}
si_llvm_optimize_module(&ctx);
/* Post-optimization transformations and analysis. */
si_optimize_vs_outputs(&ctx);
if ((debug && debug->debug_message) ||
si_can_dump_shader(sscreen, ctx.type))
si_count_scratch_private_memory(&ctx);
/* Compile to bytecode. */
r = si_compile_llvm(sscreen, &shader->binary, &shader->config, tm,
ctx.gallivm.module, debug, ctx.type, "TGSI shader");
si_llvm_dispose(&ctx);
if (r) {
fprintf(stderr, "LLVM failed to compile shader\n");
return r;
}
/* Validate SGPR and VGPR usage for compute to detect compiler bugs.
* LLVM 3.9svn has this bug.
*/
if (sel->type == PIPE_SHADER_COMPUTE) {
unsigned wave_size = 64;
unsigned max_vgprs = 256;
unsigned max_sgprs = sscreen->info.chip_class >= VI ? 800 : 512;
unsigned max_sgprs_per_wave = 128;
unsigned max_block_threads = si_get_max_workgroup_size(shader);
unsigned min_waves_per_cu = DIV_ROUND_UP(max_block_threads, wave_size);
unsigned min_waves_per_simd = DIV_ROUND_UP(min_waves_per_cu, 4);
max_vgprs = max_vgprs / min_waves_per_simd;
max_sgprs = MIN2(max_sgprs / min_waves_per_simd, max_sgprs_per_wave);
if (shader->config.num_sgprs > max_sgprs ||
shader->config.num_vgprs > max_vgprs) {
fprintf(stderr, "LLVM failed to compile a shader correctly: "
"SGPR:VGPR usage is %u:%u, but the hw limit is %u:%u\n",
shader->config.num_sgprs, shader->config.num_vgprs,
max_sgprs, max_vgprs);
/* Just terminate the process, because dependent
* shaders can hang due to bad input data, but use
* the env var to allow shader-db to work.
*/
if (!debug_get_bool_option("SI_PASS_BAD_SHADERS", false))
abort();
}
}
/* Add the scratch offset to input SGPRs. */
if (shader->config.scratch_bytes_per_wave && !is_merged_shader(shader))
shader->info.num_input_sgprs += 1; /* scratch byte offset */
/* Calculate the number of fragment input VGPRs. */
if (ctx.type == PIPE_SHADER_FRAGMENT) {
shader->info.num_input_vgprs = 0;
shader->info.face_vgpr_index = -1;
shader->info.ancillary_vgpr_index = -1;
if (G_0286CC_PERSP_SAMPLE_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 2;
if (G_0286CC_PERSP_CENTER_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 2;
if (G_0286CC_PERSP_CENTROID_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 2;
if (G_0286CC_PERSP_PULL_MODEL_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 3;
if (G_0286CC_LINEAR_SAMPLE_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 2;
if (G_0286CC_LINEAR_CENTER_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 2;
if (G_0286CC_LINEAR_CENTROID_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 2;
if (G_0286CC_LINE_STIPPLE_TEX_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 1;
if (G_0286CC_POS_X_FLOAT_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 1;
if (G_0286CC_POS_Y_FLOAT_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 1;
if (G_0286CC_POS_Z_FLOAT_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 1;
if (G_0286CC_POS_W_FLOAT_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 1;
if (G_0286CC_FRONT_FACE_ENA(shader->config.spi_ps_input_addr)) {
shader->info.face_vgpr_index = shader->info.num_input_vgprs;
shader->info.num_input_vgprs += 1;
}
if (G_0286CC_ANCILLARY_ENA(shader->config.spi_ps_input_addr)) {
shader->info.ancillary_vgpr_index = shader->info.num_input_vgprs;
shader->info.num_input_vgprs += 1;
}
if (G_0286CC_SAMPLE_COVERAGE_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 1;
if (G_0286CC_POS_FIXED_PT_ENA(shader->config.spi_ps_input_addr))
shader->info.num_input_vgprs += 1;
}
return 0;
}
/**
* Create, compile and return a shader part (prolog or epilog).
*
* \param sscreen screen
* \param list list of shader parts of the same category
* \param type shader type
* \param key shader part key
* \param prolog whether the part being requested is a prolog
* \param tm LLVM target machine
* \param debug debug callback
* \param build the callback responsible for building the main function
* \return non-NULL on success
*/
static struct si_shader_part *
si_get_shader_part(struct si_screen *sscreen,
struct si_shader_part **list,
enum pipe_shader_type type,
bool prolog,
union si_shader_part_key *key,
LLVMTargetMachineRef tm,
struct pipe_debug_callback *debug,
void (*build)(struct si_shader_context *,
union si_shader_part_key *),
const char *name)
{
struct si_shader_part *result;
mtx_lock(&sscreen->shader_parts_mutex);
/* Find existing. */
for (result = *list; result; result = result->next) {
if (memcmp(&result->key, key, sizeof(*key)) == 0) {
mtx_unlock(&sscreen->shader_parts_mutex);
return result;
}
}
/* Compile a new one. */
result = CALLOC_STRUCT(si_shader_part);
result->key = *key;
struct si_shader shader = {};
struct si_shader_context ctx;
si_init_shader_ctx(&ctx, sscreen, tm);
ctx.shader = &shader;
ctx.type = type;
switch (type) {
case PIPE_SHADER_VERTEX:
shader.key.as_ls = key->vs_prolog.as_ls;
shader.key.as_es = key->vs_prolog.as_es;
break;
case PIPE_SHADER_TESS_CTRL:
assert(!prolog);
shader.key.part.tcs.epilog = key->tcs_epilog.states;
break;
case PIPE_SHADER_GEOMETRY:
assert(prolog);
break;
case PIPE_SHADER_FRAGMENT:
if (prolog)
shader.key.part.ps.prolog = key->ps_prolog.states;
else
shader.key.part.ps.epilog = key->ps_epilog.states;
break;
default:
unreachable("bad shader part");
}
build(&ctx, key);
/* Compile. */
si_llvm_optimize_module(&ctx);
if (si_compile_llvm(sscreen, &result->binary, &result->config, tm,
ctx.ac.module, debug, ctx.type, name)) {
FREE(result);
result = NULL;
goto out;
}
result->next = *list;
*list = result;
out:
si_llvm_dispose(&ctx);
mtx_unlock(&sscreen->shader_parts_mutex);
return result;
}
static LLVMValueRef si_prolog_get_rw_buffers(struct si_shader_context *ctx)
{
LLVMValueRef ptr[2], list;
bool is_merged_shader =
ctx->screen->info.chip_class >= GFX9 &&
(ctx->type == PIPE_SHADER_TESS_CTRL ||
ctx->type == PIPE_SHADER_GEOMETRY ||
ctx->shader->key.as_ls || ctx->shader->key.as_es);
/* Get the pointer to rw buffers. */
ptr[0] = LLVMGetParam(ctx->main_fn, (is_merged_shader ? 8 : 0) + SI_SGPR_RW_BUFFERS);
ptr[1] = LLVMGetParam(ctx->main_fn, (is_merged_shader ? 8 : 0) + SI_SGPR_RW_BUFFERS_HI);
list = lp_build_gather_values(&ctx->gallivm, ptr, 2);
list = LLVMBuildBitCast(ctx->ac.builder, list, ctx->i64, "");
list = LLVMBuildIntToPtr(ctx->ac.builder, list,
si_const_array(ctx->v4i32, SI_NUM_RW_BUFFERS), "");
return list;
}
/**
* Build the vertex shader prolog function.
*
* The inputs are the same as VS (a lot of SGPRs and 4 VGPR system values).
* All inputs are returned unmodified. The vertex load indices are
* stored after them, which will be used by the API VS for fetching inputs.
*
* For example, the expected outputs for instance_divisors[] = {0, 1, 2} are:
* input_v0,
* input_v1,
* input_v2,
* input_v3,
* (VertexID + BaseVertex),
* (InstanceID + StartInstance),
* (InstanceID / 2 + StartInstance)
*/
static void si_build_vs_prolog_function(struct si_shader_context *ctx,
union si_shader_part_key *key)
{
struct si_function_info fninfo;
LLVMTypeRef *returns;
LLVMValueRef ret, func;
int num_returns, i;
unsigned first_vs_vgpr = key->vs_prolog.num_merged_next_stage_vgprs;
unsigned num_input_vgprs = key->vs_prolog.num_merged_next_stage_vgprs + 4;
LLVMValueRef input_vgprs[9];
unsigned num_all_input_regs = key->vs_prolog.num_input_sgprs +
num_input_vgprs;
unsigned user_sgpr_base = key->vs_prolog.num_merged_next_stage_vgprs ? 8 : 0;
si_init_function_info(&fninfo);
/* 4 preloaded VGPRs + vertex load indices as prolog outputs */
returns = alloca((num_all_input_regs + key->vs_prolog.last_input + 1) *
sizeof(LLVMTypeRef));
num_returns = 0;
/* Declare input and output SGPRs. */
for (i = 0; i < key->vs_prolog.num_input_sgprs; i++) {
add_arg(&fninfo, ARG_SGPR, ctx->i32);
returns[num_returns++] = ctx->i32;
}
/* Preloaded VGPRs (outputs must be floats) */
for (i = 0; i < num_input_vgprs; i++) {
add_arg_assign(&fninfo, ARG_VGPR, ctx->i32, &input_vgprs[i]);
returns[num_returns++] = ctx->f32;
}
/* Vertex load indices. */
for (i = 0; i <= key->vs_prolog.last_input; i++)
returns[num_returns++] = ctx->f32;
/* Create the function. */
si_create_function(ctx, "vs_prolog", returns, num_returns, &fninfo, 0);
func = ctx->main_fn;
if (key->vs_prolog.num_merged_next_stage_vgprs) {
if (!key->vs_prolog.is_monolithic)
si_init_exec_from_input(ctx, 3, 0);
if (key->vs_prolog.as_ls &&
ctx->screen->has_ls_vgpr_init_bug) {
/* If there are no HS threads, SPI loads the LS VGPRs
* starting at VGPR 0. Shift them back to where they
* belong.
*/
LLVMValueRef has_hs_threads =
LLVMBuildICmp(ctx->ac.builder, LLVMIntNE,
unpack_param(ctx, 3, 8, 8),
ctx->i32_0, "");
for (i = 4; i > 0; --i) {
input_vgprs[i + 1] =
LLVMBuildSelect(ctx->ac.builder, has_hs_threads,
input_vgprs[i + 1],
input_vgprs[i - 1], "");
}
}
}
ctx->abi.vertex_id = input_vgprs[first_vs_vgpr];
ctx->abi.instance_id = input_vgprs[first_vs_vgpr + (key->vs_prolog.as_ls ? 2 : 1)];
/* Copy inputs to outputs. This should be no-op, as the registers match,
* but it will prevent the compiler from overwriting them unintentionally.
*/
ret = ctx->return_value;
for (i = 0; i < key->vs_prolog.num_input_sgprs; i++) {
LLVMValueRef p = LLVMGetParam(func, i);
ret = LLVMBuildInsertValue(ctx->ac.builder, ret, p, i, "");
}
for (i = 0; i < num_input_vgprs; i++) {
LLVMValueRef p = input_vgprs[i];
p = ac_to_float(&ctx->ac, p);
ret = LLVMBuildInsertValue(ctx->ac.builder, ret, p,
key->vs_prolog.num_input_sgprs + i, "");
}
/* Compute vertex load indices from instance divisors. */
LLVMValueRef instance_divisor_constbuf = NULL;
if (key->vs_prolog.states.instance_divisor_is_fetched) {
LLVMValueRef list = si_prolog_get_rw_buffers(ctx);
LLVMValueRef buf_index =
LLVMConstInt(ctx->i32, SI_VS_CONST_INSTANCE_DIVISORS, 0);
instance_divisor_constbuf =
ac_build_load_to_sgpr(&ctx->ac, list, buf_index);
}
for (i = 0; i <= key->vs_prolog.last_input; i++) {
bool divisor_is_one =
key->vs_prolog.states.instance_divisor_is_one & (1u << i);
bool divisor_is_fetched =
key->vs_prolog.states.instance_divisor_is_fetched & (1u << i);
LLVMValueRef index;
if (divisor_is_one || divisor_is_fetched) {
LLVMValueRef divisor = ctx->i32_1;
if (divisor_is_fetched) {
divisor = buffer_load_const(ctx, instance_divisor_constbuf,
LLVMConstInt(ctx->i32, i * 4, 0));
divisor = ac_to_integer(&ctx->ac, divisor);
}
/* InstanceID / Divisor + StartInstance */
index = get_instance_index_for_fetch(ctx,
user_sgpr_base +
SI_SGPR_START_INSTANCE,
divisor);
} else {
/* VertexID + BaseVertex */
index = LLVMBuildAdd(ctx->ac.builder,
ctx->abi.vertex_id,
LLVMGetParam(func, user_sgpr_base +
SI_SGPR_BASE_VERTEX), "");
}
index = ac_to_float(&ctx->ac, index);
ret = LLVMBuildInsertValue(ctx->ac.builder, ret, index,
fninfo.num_params + i, "");
}
si_llvm_build_ret(ctx, ret);
}
static bool si_get_vs_prolog(struct si_screen *sscreen,
LLVMTargetMachineRef tm,
struct si_shader *shader,
struct pipe_debug_callback *debug,
struct si_shader *main_part,
const struct si_vs_prolog_bits *key)
{
struct si_shader_selector *vs = main_part->selector;
if (!si_vs_needs_prolog(vs, key))
return true;
/* Get the prolog. */
union si_shader_part_key prolog_key;
si_get_vs_prolog_key(&vs->info, main_part->info.num_input_sgprs,
key, shader, &prolog_key);
shader->prolog =
si_get_shader_part(sscreen, &sscreen->vs_prologs,
PIPE_SHADER_VERTEX, true, &prolog_key, tm,
debug, si_build_vs_prolog_function,
"Vertex Shader Prolog");
return shader->prolog != NULL;
}
/**
* Select and compile (or reuse) vertex shader parts (prolog & epilog).
*/
static bool si_shader_select_vs_parts(struct si_screen *sscreen,
LLVMTargetMachineRef tm,
struct si_shader *shader,
struct pipe_debug_callback *debug)
{
return si_get_vs_prolog(sscreen, tm, shader, debug, shader,
&shader->key.part.vs.prolog);
}
/**
* Compile the TCS epilog function. This writes tesselation factors to memory
* based on the output primitive type of the tesselator (determined by TES).
*/
static void si_build_tcs_epilog_function(struct si_shader_context *ctx,
union si_shader_part_key *key)
{
struct lp_build_tgsi_context *bld_base = &ctx->bld_base;
struct si_function_info fninfo;
LLVMValueRef func;
si_init_function_info(&fninfo);
if (ctx->screen->info.chip_class >= GFX9) {
add_arg(&fninfo, ARG_SGPR, ctx->i64);
ctx->param_tcs_offchip_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32); /* wave info */
ctx->param_tcs_factor_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i64);
add_arg(&fninfo, ARG_SGPR, ctx->i64);
add_arg(&fninfo, ARG_SGPR, ctx->i64);
add_arg(&fninfo, ARG_SGPR, ctx->i64);
add_arg(&fninfo, ARG_SGPR, ctx->i64);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_offchip_layout = add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_offchip_addr_base64k = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_factor_addr_base64k = add_arg(&fninfo, ARG_SGPR, ctx->i32);
} else {
add_arg(&fninfo, ARG_SGPR, ctx->i64);
add_arg(&fninfo, ARG_SGPR, ctx->i64);
add_arg(&fninfo, ARG_SGPR, ctx->i64);
add_arg(&fninfo, ARG_SGPR, ctx->i64);
ctx->param_tcs_offchip_layout = add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_offchip_addr_base64k = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_factor_addr_base64k = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_offchip_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
ctx->param_tcs_factor_offset = add_arg(&fninfo, ARG_SGPR, ctx->i32);
}
add_arg(&fninfo, ARG_VGPR, ctx->i32); /* VGPR gap */
add_arg(&fninfo, ARG_VGPR, ctx->i32); /* VGPR gap */
unsigned tess_factors_idx =
add_arg(&fninfo, ARG_VGPR, ctx->i32); /* patch index within the wave (REL_PATCH_ID) */
add_arg(&fninfo, ARG_VGPR, ctx->i32); /* invocation ID within the patch */
add_arg(&fninfo, ARG_VGPR, ctx->i32); /* LDS offset where tess factors should be loaded from */
for (unsigned i = 0; i < 6; i++)
add_arg(&fninfo, ARG_VGPR, ctx->i32); /* tess factors */
/* Create the function. */
si_create_function(ctx, "tcs_epilog", NULL, 0, &fninfo,
ctx->screen->info.chip_class >= CIK ? 128 : 64);
ac_declare_lds_as_pointer(&ctx->ac);
func = ctx->main_fn;
LLVMValueRef invoc0_tess_factors[6];
for (unsigned i = 0; i < 6; i++)
invoc0_tess_factors[i] = LLVMGetParam(func, tess_factors_idx + 3 + i);
si_write_tess_factors(bld_base,
LLVMGetParam(func, tess_factors_idx),
LLVMGetParam(func, tess_factors_idx + 1),
LLVMGetParam(func, tess_factors_idx + 2),
invoc0_tess_factors, invoc0_tess_factors + 4);
LLVMBuildRetVoid(ctx->ac.builder);
}
/**
* Select and compile (or reuse) TCS parts (epilog).
*/
static bool si_shader_select_tcs_parts(struct si_screen *sscreen,
LLVMTargetMachineRef tm,
struct si_shader *shader,
struct pipe_debug_callback *debug)
{
if (sscreen->info.chip_class >= GFX9) {
struct si_shader *ls_main_part =
shader->key.part.tcs.ls->main_shader_part_ls;
if (!si_get_vs_prolog(sscreen, tm, shader, debug, ls_main_part,
&shader->key.part.tcs.ls_prolog))
return false;
shader->previous_stage = ls_main_part;
}
/* Get the epilog. */
union si_shader_part_key epilog_key;
memset(&epilog_key, 0, sizeof(epilog_key));
epilog_key.tcs_epilog.states = shader->key.part.tcs.epilog;
shader->epilog = si_get_shader_part(sscreen, &sscreen->tcs_epilogs,
PIPE_SHADER_TESS_CTRL, false,
&epilog_key, tm, debug,
si_build_tcs_epilog_function,
"Tessellation Control Shader Epilog");
return shader->epilog != NULL;
}
/**
* Select and compile (or reuse) GS parts (prolog).
*/
static bool si_shader_select_gs_parts(struct si_screen *sscreen,
LLVMTargetMachineRef tm,
struct si_shader *shader,
struct pipe_debug_callback *debug)
{
if (sscreen->info.chip_class >= GFX9) {
struct si_shader *es_main_part =
shader->key.part.gs.es->main_shader_part_es;
if (shader->key.part.gs.es->type == PIPE_SHADER_VERTEX &&
!si_get_vs_prolog(sscreen, tm, shader, debug, es_main_part,
&shader->key.part.gs.vs_prolog))
return false;
shader->previous_stage = es_main_part;
}
if (!shader->key.part.gs.prolog.tri_strip_adj_fix)
return true;
union si_shader_part_key prolog_key;
memset(&prolog_key, 0, sizeof(prolog_key));
prolog_key.gs_prolog.states = shader->key.part.gs.prolog;
shader->prolog2 = si_get_shader_part(sscreen, &sscreen->gs_prologs,
PIPE_SHADER_GEOMETRY, true,
&prolog_key, tm, debug,
si_build_gs_prolog_function,
"Geometry Shader Prolog");
return shader->prolog2 != NULL;
}
/**
* Build the pixel shader prolog function. This handles:
* - two-side color selection and interpolation
* - overriding interpolation parameters for the API PS
* - polygon stippling
*
* All preloaded SGPRs and VGPRs are passed through unmodified unless they are
* overriden by other states. (e.g. per-sample interpolation)
* Interpolated colors are stored after the preloaded VGPRs.
*/
static void si_build_ps_prolog_function(struct si_shader_context *ctx,
union si_shader_part_key *key)
{
struct si_function_info fninfo;
LLVMValueRef ret, func;
int num_returns, i, num_color_channels;
assert(si_need_ps_prolog(key));
si_init_function_info(&fninfo);
/* Declare inputs. */
for (i = 0; i < key->ps_prolog.num_input_sgprs; i++)
add_arg(&fninfo, ARG_SGPR, ctx->i32);
for (i = 0; i < key->ps_prolog.num_input_vgprs; i++)
add_arg(&fninfo, ARG_VGPR, ctx->f32);
/* Declare outputs (same as inputs + add colors if needed) */
num_returns = fninfo.num_params;
num_color_channels = util_bitcount(key->ps_prolog.colors_read);
for (i = 0; i < num_color_channels; i++)
fninfo.types[num_returns++] = ctx->f32;
/* Create the function. */
si_create_function(ctx, "ps_prolog", fninfo.types, num_returns,
&fninfo, 0);
func = ctx->main_fn;
/* Copy inputs to outputs. This should be no-op, as the registers match,
* but it will prevent the compiler from overwriting them unintentionally.
*/
ret = ctx->return_value;
for (i = 0; i < fninfo.num_params; i++) {
LLVMValueRef p = LLVMGetParam(func, i);
ret = LLVMBuildInsertValue(ctx->ac.builder, ret, p, i, "");
}
/* Polygon stippling. */
if (key->ps_prolog.states.poly_stipple) {
/* POS_FIXED_PT is always last. */
unsigned pos = key->ps_prolog.num_input_sgprs +
key->ps_prolog.num_input_vgprs - 1;
LLVMValueRef list = si_prolog_get_rw_buffers(ctx);
si_llvm_emit_polygon_stipple(ctx, list, pos);
}
if (key->ps_prolog.states.bc_optimize_for_persp ||
key->ps_prolog.states.bc_optimize_for_linear) {
unsigned i, base = key->ps_prolog.num_input_sgprs;
LLVMValueRef center[2], centroid[2], tmp, bc_optimize;
/* The shader should do: if (PRIM_MASK[31]) CENTROID = CENTER;
* The hw doesn't compute CENTROID if the whole wave only
* contains fully-covered quads.
*
* PRIM_MASK is after user SGPRs.
*/
bc_optimize = LLVMGetParam(func, SI_PS_NUM_USER_SGPR);
bc_optimize = LLVMBuildLShr(ctx->ac.builder, bc_optimize,
LLVMConstInt(ctx->i32, 31, 0), "");
bc_optimize = LLVMBuildTrunc(ctx->ac.builder, bc_optimize,
ctx->i1, "");
if (key->ps_prolog.states.bc_optimize_for_persp) {
/* Read PERSP_CENTER. */
for (i = 0; i < 2; i++)
center[i] = LLVMGetParam(func, base + 2 + i);
/* Read PERSP_CENTROID. */
for (i = 0; i < 2; i++)
centroid[i] = LLVMGetParam(func, base + 4 + i);
/* Select PERSP_CENTROID. */
for (i = 0; i < 2; i++) {
tmp = LLVMBuildSelect(ctx->ac.builder, bc_optimize,
center[i], centroid[i], "");
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
tmp, base + 4 + i, "");
}
}
if (key->ps_prolog.states.bc_optimize_for_linear) {
/* Read LINEAR_CENTER. */
for (i = 0; i < 2; i++)
center[i] = LLVMGetParam(func, base + 8 + i);
/* Read LINEAR_CENTROID. */
for (i = 0; i < 2; i++)
centroid[i] = LLVMGetParam(func, base + 10 + i);
/* Select LINEAR_CENTROID. */
for (i = 0; i < 2; i++) {
tmp = LLVMBuildSelect(ctx->ac.builder, bc_optimize,
center[i], centroid[i], "");
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
tmp, base + 10 + i, "");
}
}
}
/* Force per-sample interpolation. */
if (key->ps_prolog.states.force_persp_sample_interp) {
unsigned i, base = key->ps_prolog.num_input_sgprs;
LLVMValueRef persp_sample[2];
/* Read PERSP_SAMPLE. */
for (i = 0; i < 2; i++)
persp_sample[i] = LLVMGetParam(func, base + i);
/* Overwrite PERSP_CENTER. */
for (i = 0; i < 2; i++)
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
persp_sample[i], base + 2 + i, "");
/* Overwrite PERSP_CENTROID. */
for (i = 0; i < 2; i++)
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
persp_sample[i], base + 4 + i, "");
}
if (key->ps_prolog.states.force_linear_sample_interp) {
unsigned i, base = key->ps_prolog.num_input_sgprs;
LLVMValueRef linear_sample[2];
/* Read LINEAR_SAMPLE. */
for (i = 0; i < 2; i++)
linear_sample[i] = LLVMGetParam(func, base + 6 + i);
/* Overwrite LINEAR_CENTER. */
for (i = 0; i < 2; i++)
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
linear_sample[i], base + 8 + i, "");
/* Overwrite LINEAR_CENTROID. */
for (i = 0; i < 2; i++)
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
linear_sample[i], base + 10 + i, "");
}
/* Force center interpolation. */
if (key->ps_prolog.states.force_persp_center_interp) {
unsigned i, base = key->ps_prolog.num_input_sgprs;
LLVMValueRef persp_center[2];
/* Read PERSP_CENTER. */
for (i = 0; i < 2; i++)
persp_center[i] = LLVMGetParam(func, base + 2 + i);
/* Overwrite PERSP_SAMPLE. */
for (i = 0; i < 2; i++)
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
persp_center[i], base + i, "");
/* Overwrite PERSP_CENTROID. */
for (i = 0; i < 2; i++)
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
persp_center[i], base + 4 + i, "");
}
if (key->ps_prolog.states.force_linear_center_interp) {
unsigned i, base = key->ps_prolog.num_input_sgprs;
LLVMValueRef linear_center[2];
/* Read LINEAR_CENTER. */
for (i = 0; i < 2; i++)
linear_center[i] = LLVMGetParam(func, base + 8 + i);
/* Overwrite LINEAR_SAMPLE. */
for (i = 0; i < 2; i++)
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
linear_center[i], base + 6 + i, "");
/* Overwrite LINEAR_CENTROID. */
for (i = 0; i < 2; i++)
ret = LLVMBuildInsertValue(ctx->ac.builder, ret,
linear_center[i], base + 10 + i, "");
}
/* Interpolate colors. */
unsigned color_out_idx = 0;
for (i = 0; i < 2; i++) {
unsigned writemask = (key->ps_prolog.colors_read >> (i * 4)) & 0xf;
unsigned face_vgpr = key->ps_prolog.num_input_sgprs +
key->ps_prolog.face_vgpr_index;
LLVMValueRef interp[2], color[4];
LLVMValueRef interp_ij = NULL, prim_mask = NULL, face = NULL;
if (!writemask)
continue;
/* If the interpolation qualifier is not CONSTANT (-1). */
if (key->ps_prolog.color_interp_vgpr_index[i] != -1) {
unsigned interp_vgpr = key->ps_prolog.num_input_sgprs +
key->ps_prolog.color_interp_vgpr_index[i];
/* Get the (i,j) updated by bc_optimize handling. */
interp[0] = LLVMBuildExtractValue(ctx->ac.builder, ret,
interp_vgpr, "");
interp[1] = LLVMBuildExtractValue(ctx->ac.builder, ret,
interp_vgpr + 1, "");
interp_ij = lp_build_gather_values(&ctx->gallivm, interp, 2);
}
/* Use the absolute location of the input. */
prim_mask = LLVMGetParam(func, SI_PS_NUM_USER_SGPR);
if (key->ps_prolog.states.color_two_side) {
face = LLVMGetParam(func, face_vgpr);
face = ac_to_integer(&ctx->ac, face);
}
interp_fs_input(ctx,
key->ps_prolog.color_attr_index[i],
TGSI_SEMANTIC_COLOR, i,
key->ps_prolog.num_interp_inputs,
key->ps_prolog.colors_read, interp_ij,
prim_mask, face, color);
while (writemask) {
unsigned chan = u_bit_scan(&writemask);
ret = LLVMBuildInsertValue(ctx->ac.builder, ret, color[chan],
fninfo.num_params + color_out_idx++, "");
}
}
/* Section 15.2.2 (Shader Inputs) of the OpenGL 4.5 (Core Profile) spec
* says:
*
* "When per-sample shading is active due to the use of a fragment
* input qualified by sample or due to the use of the gl_SampleID
* or gl_SamplePosition variables, only the bit for the current
* sample is set in gl_SampleMaskIn. When state specifies multiple
* fragment shader invocations for a given fragment, the sample
* mask for any single fragment shader invocation may specify a
* subset of the covered samples for the fragment. In this case,
* the bit corresponding to each covered sample will be set in
* exactly one fragment shader invocation."
*
* The samplemask loaded by hardware is always the coverage of the
* entire pixel/fragment, so mask bits out based on the sample ID.
*/
if (key->ps_prolog.states.samplemask_log_ps_iter) {
/* The bit pattern matches that used by fixed function fragment
* processing. */
static const uint16_t ps_iter_masks[] = {
0xffff, /* not used */
0x5555,
0x1111,
0x0101,
0x0001,
};
assert(key->ps_prolog.states.samplemask_log_ps_iter < ARRAY_SIZE(ps_iter_masks));
uint32_t ps_iter_mask = ps_iter_masks[key->ps_prolog.states.samplemask_log_ps_iter];
unsigned ancillary_vgpr = key->ps_prolog.num_input_sgprs +
key->ps_prolog.ancillary_vgpr_index;
LLVMValueRef sampleid = unpack_param(ctx, ancillary_vgpr, 8, 4);
LLVMValueRef samplemask = LLVMGetParam(func, ancillary_vgpr + 1);
samplemask = ac_to_integer(&ctx->ac, samplemask);
samplemask = LLVMBuildAnd(
ctx->ac.builder,
samplemask,
LLVMBuildShl(ctx->ac.builder,
LLVMConstInt(ctx->i32, ps_iter_mask, false),
sampleid, ""),
"");
samplemask = ac_to_float(&ctx->ac, samplemask);
ret = LLVMBuildInsertValue(ctx->ac.builder, ret, samplemask,
ancillary_vgpr + 1, "");
}
/* Tell LLVM to insert WQM instruction sequence when needed. */
if (key->ps_prolog.wqm) {
LLVMAddTargetDependentFunctionAttr(func,
"amdgpu-ps-wqm-outputs", "");
}
si_llvm_build_ret(ctx, ret);
}
/**
* Build the pixel shader epilog function. This handles everything that must be
* emulated for pixel shader exports. (alpha-test, format conversions, etc)
*/
static void si_build_ps_epilog_function(struct si_shader_context *ctx,
union si_shader_part_key *key)
{
struct lp_build_tgsi_context *bld_base = &ctx->bld_base;
struct si_function_info fninfo;
LLVMValueRef depth = NULL, stencil = NULL, samplemask = NULL;
int i;
struct si_ps_exports exp = {};
si_init_function_info(&fninfo);
/* Declare input SGPRs. */
ctx->param_rw_buffers = add_arg(&fninfo, ARG_SGPR, ctx->i64);
ctx->param_bindless_samplers_and_images = add_arg(&fninfo, ARG_SGPR, ctx->i64);
ctx->param_const_and_shader_buffers = add_arg(&fninfo, ARG_SGPR, ctx->i64);
ctx->param_samplers_and_images = add_arg(&fninfo, ARG_SGPR, ctx->i64);
add_arg_checked(&fninfo, ARG_SGPR, ctx->f32, SI_PARAM_ALPHA_REF);
/* Declare input VGPRs. */
unsigned required_num_params =
fninfo.num_sgpr_params +
util_bitcount(key->ps_epilog.colors_written) * 4 +
key->ps_epilog.writes_z +
key->ps_epilog.writes_stencil +
key->ps_epilog.writes_samplemask;
required_num_params = MAX2(required_num_params,
fninfo.num_sgpr_params + PS_EPILOG_SAMPLEMASK_MIN_LOC + 1);
while (fninfo.num_params < required_num_params)
add_arg(&fninfo, ARG_VGPR, ctx->f32);
/* Create the function. */
si_create_function(ctx, "ps_epilog", NULL, 0, &fninfo, 0);
/* Disable elimination of unused inputs. */
si_llvm_add_attribute(ctx->main_fn,
"InitialPSInputAddr", 0xffffff);
/* Process colors. */
unsigned vgpr = fninfo.num_sgpr_params;
unsigned colors_written = key->ps_epilog.colors_written;
int last_color_export = -1;
/* Find the last color export. */
if (!key->ps_epilog.writes_z &&
!key->ps_epilog.writes_stencil &&
!key->ps_epilog.writes_samplemask) {
unsigned spi_format = key->ps_epilog.states.spi_shader_col_format;
/* If last_cbuf > 0, FS_COLOR0_WRITES_ALL_CBUFS is true. */
if (colors_written == 0x1 && key->ps_epilog.states.last_cbuf > 0) {
/* Just set this if any of the colorbuffers are enabled. */
if (spi_format &
((1ull << (4 * (key->ps_epilog.states.last_cbuf + 1))) - 1))
last_color_export = 0;
} else {
for (i = 0; i < 8; i++)
if (colors_written & (1 << i) &&
(spi_format >> (i * 4)) & 0xf)
last_color_export = i;
}
}
while (colors_written) {
LLVMValueRef color[4];
int mrt = u_bit_scan(&colors_written);
for (i = 0; i < 4; i++)
color[i] = LLVMGetParam(ctx->main_fn, vgpr++);
si_export_mrt_color(bld_base, color, mrt,
fninfo.num_params - 1,
mrt == last_color_export, &exp);
}
/* Process depth, stencil, samplemask. */
if (key->ps_epilog.writes_z)
depth = LLVMGetParam(ctx->main_fn, vgpr++);
if (key->ps_epilog.writes_stencil)
stencil = LLVMGetParam(ctx->main_fn, vgpr++);
if (key->ps_epilog.writes_samplemask)
samplemask = LLVMGetParam(ctx->main_fn, vgpr++);
if (depth || stencil || samplemask)
si_export_mrt_z(bld_base, depth, stencil, samplemask, &exp);
else if (last_color_export == -1)
si_export_null(bld_base);
if (exp.num)
si_emit_ps_exports(ctx, &exp);
/* Compile. */
LLVMBuildRetVoid(ctx->ac.builder);
}
/**
* Select and compile (or reuse) pixel shader parts (prolog & epilog).
*/
static bool si_shader_select_ps_parts(struct si_screen *sscreen,
LLVMTargetMachineRef tm,
struct si_shader *shader,
struct pipe_debug_callback *debug)
{
union si_shader_part_key prolog_key;
union si_shader_part_key epilog_key;
/* Get the prolog. */
si_get_ps_prolog_key(shader, &prolog_key, true);
/* The prolog is a no-op if these aren't set. */
if (si_need_ps_prolog(&prolog_key)) {
shader->prolog =
si_get_shader_part(sscreen, &sscreen->ps_prologs,
PIPE_SHADER_FRAGMENT, true,
&prolog_key, tm, debug,
si_build_ps_prolog_function,
"Fragment Shader Prolog");
if (!shader->prolog)
return false;
}
/* Get the epilog. */
si_get_ps_epilog_key(shader, &epilog_key);
shader->epilog =
si_get_shader_part(sscreen, &sscreen->ps_epilogs,
PIPE_SHADER_FRAGMENT, false,
&epilog_key, tm, debug,
si_build_ps_epilog_function,
"Fragment Shader Epilog");
if (!shader->epilog)
return false;
/* Enable POS_FIXED_PT if polygon stippling is enabled. */
if (shader->key.part.ps.prolog.poly_stipple) {
shader->config.spi_ps_input_ena |= S_0286CC_POS_FIXED_PT_ENA(1);
assert(G_0286CC_POS_FIXED_PT_ENA(shader->config.spi_ps_input_addr));
}
/* Set up the enable bits for per-sample shading if needed. */
if (shader->key.part.ps.prolog.force_persp_sample_interp &&
(G_0286CC_PERSP_CENTER_ENA(shader->config.spi_ps_input_ena) ||
G_0286CC_PERSP_CENTROID_ENA(shader->config.spi_ps_input_ena))) {
shader->config.spi_ps_input_ena &= C_0286CC_PERSP_CENTER_ENA;
shader->config.spi_ps_input_ena &= C_0286CC_PERSP_CENTROID_ENA;
shader->config.spi_ps_input_ena |= S_0286CC_PERSP_SAMPLE_ENA(1);
}
if (shader->key.part.ps.prolog.force_linear_sample_interp &&
(G_0286CC_LINEAR_CENTER_ENA(shader->config.spi_ps_input_ena) ||
G_0286CC_LINEAR_CENTROID_ENA(shader->config.spi_ps_input_ena))) {
shader->config.spi_ps_input_ena &= C_0286CC_LINEAR_CENTER_ENA;
shader->config.spi_ps_input_ena &= C_0286CC_LINEAR_CENTROID_ENA;
shader->config.spi_ps_input_ena |= S_0286CC_LINEAR_SAMPLE_ENA(1);
}
if (shader->key.part.ps.prolog.force_persp_center_interp &&
(G_0286CC_PERSP_SAMPLE_ENA(shader->config.spi_ps_input_ena) ||
G_0286CC_PERSP_CENTROID_ENA(shader->config.spi_ps_input_ena))) {
shader->config.spi_ps_input_ena &= C_0286CC_PERSP_SAMPLE_ENA;
shader->config.spi_ps_input_ena &= C_0286CC_PERSP_CENTROID_ENA;
shader->config.spi_ps_input_ena |= S_0286CC_PERSP_CENTER_ENA(1);
}
if (shader->key.part.ps.prolog.force_linear_center_interp &&
(G_0286CC_LINEAR_SAMPLE_ENA(shader->config.spi_ps_input_ena) ||
G_0286CC_LINEAR_CENTROID_ENA(shader->config.spi_ps_input_ena))) {
shader->config.spi_ps_input_ena &= C_0286CC_LINEAR_SAMPLE_ENA;
shader->config.spi_ps_input_ena &= C_0286CC_LINEAR_CENTROID_ENA;
shader->config.spi_ps_input_ena |= S_0286CC_LINEAR_CENTER_ENA(1);
}
/* POW_W_FLOAT requires that one of the perspective weights is enabled. */
if (G_0286CC_POS_W_FLOAT_ENA(shader->config.spi_ps_input_ena) &&
!(shader->config.spi_ps_input_ena & 0xf)) {
shader->config.spi_ps_input_ena |= S_0286CC_PERSP_CENTER_ENA(1);
assert(G_0286CC_PERSP_CENTER_ENA(shader->config.spi_ps_input_addr));
}
/* At least one pair of interpolation weights must be enabled. */
if (!(shader->config.spi_ps_input_ena & 0x7f)) {
shader->config.spi_ps_input_ena |= S_0286CC_LINEAR_CENTER_ENA(1);
assert(G_0286CC_LINEAR_CENTER_ENA(shader->config.spi_ps_input_addr));
}
/* Samplemask fixup requires the sample ID. */
if (shader->key.part.ps.prolog.samplemask_log_ps_iter) {
shader->config.spi_ps_input_ena |= S_0286CC_ANCILLARY_ENA(1);
assert(G_0286CC_ANCILLARY_ENA(shader->config.spi_ps_input_addr));
}
/* The sample mask input is always enabled, because the API shader always
* passes it through to the epilog. Disable it here if it's unused.
*/
if (!shader->key.part.ps.epilog.poly_line_smoothing &&
!shader->selector->info.reads_samplemask)
shader->config.spi_ps_input_ena &= C_0286CC_SAMPLE_COVERAGE_ENA;
return true;
}
void si_multiwave_lds_size_workaround(struct si_screen *sscreen,
unsigned *lds_size)
{
/* SPI barrier management bug:
* Make sure we have at least 4k of LDS in use to avoid the bug.
* It applies to workgroup sizes of more than one wavefront.
*/
if (sscreen->info.family == CHIP_BONAIRE ||
sscreen->info.family == CHIP_KABINI ||
sscreen->info.family == CHIP_MULLINS)
*lds_size = MAX2(*lds_size, 8);
}
static void si_fix_resource_usage(struct si_screen *sscreen,
struct si_shader *shader)
{
unsigned min_sgprs = shader->info.num_input_sgprs + 2; /* VCC */
shader->config.num_sgprs = MAX2(shader->config.num_sgprs, min_sgprs);
if (shader->selector->type == PIPE_SHADER_COMPUTE &&
si_get_max_workgroup_size(shader) > 64) {
si_multiwave_lds_size_workaround(sscreen,
&shader->config.lds_size);
}
}
int si_shader_create(struct si_screen *sscreen, LLVMTargetMachineRef tm,
struct si_shader *shader,
struct pipe_debug_callback *debug)
{
struct si_shader_selector *sel = shader->selector;
struct si_shader *mainp = *si_get_main_shader_part(sel, &shader->key);
int r;
/* LS, ES, VS are compiled on demand if the main part hasn't been
* compiled for that stage.
*
* Vertex shaders are compiled on demand when a vertex fetch
* workaround must be applied.
*/
if (shader->is_monolithic) {
/* Monolithic shader (compiled as a whole, has many variants,
* may take a long time to compile).
*/
r = si_compile_tgsi_shader(sscreen, tm, shader, true, debug);
if (r)
return r;
} else {
/* The shader consists of several parts:
*
* - the middle part is the user shader, it has 1 variant only
* and it was compiled during the creation of the shader
* selector
* - the prolog part is inserted at the beginning
* - the epilog part is inserted at the end
*
* The prolog and epilog have many (but simple) variants.
*
* Starting with gfx9, geometry and tessellation control
* shaders also contain the prolog and user shader parts of
* the previous shader stage.
*/
if (!mainp)
return -1;
/* Copy the compiled TGSI shader data over. */
shader->is_binary_shared = true;
shader->binary = mainp->binary;
shader->config = mainp->config;
shader->info.num_input_sgprs = mainp->info.num_input_sgprs;
shader->info.num_input_vgprs = mainp->info.num_input_vgprs;
shader->info.face_vgpr_index = mainp->info.face_vgpr_index;
shader->info.ancillary_vgpr_index = mainp->info.ancillary_vgpr_index;
memcpy(shader->info.vs_output_param_offset,
mainp->info.vs_output_param_offset,
sizeof(mainp->info.vs_output_param_offset));
shader->info.uses_instanceid = mainp->info.uses_instanceid;
shader->info.nr_pos_exports = mainp->info.nr_pos_exports;
shader->info.nr_param_exports = mainp->info.nr_param_exports;
/* Select prologs and/or epilogs. */
switch (sel->type) {
case PIPE_SHADER_VERTEX:
if (!si_shader_select_vs_parts(sscreen, tm, shader, debug))
return -1;
break;
case PIPE_SHADER_TESS_CTRL:
if (!si_shader_select_tcs_parts(sscreen, tm, shader, debug))
return -1;
break;
case PIPE_SHADER_TESS_EVAL:
break;
case PIPE_SHADER_GEOMETRY:
if (!si_shader_select_gs_parts(sscreen, tm, shader, debug))
return -1;
break;
case PIPE_SHADER_FRAGMENT:
if (!si_shader_select_ps_parts(sscreen, tm, shader, debug))
return -1;
/* Make sure we have at least as many VGPRs as there
* are allocated inputs.
*/
shader->config.num_vgprs = MAX2(shader->config.num_vgprs,
shader->info.num_input_vgprs);
break;
}
/* Update SGPR and VGPR counts. */
if (shader->prolog) {
shader->config.num_sgprs = MAX2(shader->config.num_sgprs,
shader->prolog->config.num_sgprs);
shader->config.num_vgprs = MAX2(shader->config.num_vgprs,
shader->prolog->config.num_vgprs);
}
if (shader->previous_stage) {
shader->config.num_sgprs = MAX2(shader->config.num_sgprs,
shader->previous_stage->config.num_sgprs);
shader->config.num_vgprs = MAX2(shader->config.num_vgprs,
shader->previous_stage->config.num_vgprs);
shader->config.spilled_sgprs =
MAX2(shader->config.spilled_sgprs,
shader->previous_stage->config.spilled_sgprs);
shader->config.spilled_vgprs =
MAX2(shader->config.spilled_vgprs,
shader->previous_stage->config.spilled_vgprs);
shader->config.private_mem_vgprs =
MAX2(shader->config.private_mem_vgprs,
shader->previous_stage->config.private_mem_vgprs);
shader->config.scratch_bytes_per_wave =
MAX2(shader->config.scratch_bytes_per_wave,
shader->previous_stage->config.scratch_bytes_per_wave);
shader->info.uses_instanceid |=
shader->previous_stage->info.uses_instanceid;
}
if (shader->prolog2) {
shader->config.num_sgprs = MAX2(shader->config.num_sgprs,
shader->prolog2->config.num_sgprs);
shader->config.num_vgprs = MAX2(shader->config.num_vgprs,
shader->prolog2->config.num_vgprs);
}
if (shader->epilog) {
shader->config.num_sgprs = MAX2(shader->config.num_sgprs,
shader->epilog->config.num_sgprs);
shader->config.num_vgprs = MAX2(shader->config.num_vgprs,
shader->epilog->config.num_vgprs);
}
}
si_fix_resource_usage(sscreen, shader);
si_shader_dump(sscreen, shader, debug, sel->info.processor,
stderr, true);
/* Upload. */
r = si_shader_binary_upload(sscreen, shader);
if (r) {
fprintf(stderr, "LLVM failed to upload shader\n");
return r;
}
return 0;
}
void si_shader_destroy(struct si_shader *shader)
{
if (shader->scratch_bo)
r600_resource_reference(&shader->scratch_bo, NULL);
r600_resource_reference(&shader->bo, NULL);
if (!shader->is_binary_shared)
ac_shader_binary_clean(&shader->binary);
free(shader->shader_log);
}