| /* |
| * Copyright 2014 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 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 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 COPYRIGHT HOLDERS, AUTHORS AND/OR ITS 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. |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| */ |
| /* based on pieces from si_pipe.c and radeon_llvm_emit.c */ |
| #include "ac_llvm_build.h" |
| |
| #include <llvm-c/Core.h> |
| |
| #include "c11/threads.h" |
| |
| #include <assert.h> |
| #include <stdio.h> |
| |
| #include "ac_llvm_util.h" |
| #include "ac_exp_param.h" |
| #include "util/bitscan.h" |
| #include "util/macros.h" |
| #include "util/u_atomic.h" |
| #include "sid.h" |
| |
| #include "shader_enums.h" |
| |
| #define AC_LLVM_INITIAL_CF_DEPTH 4 |
| |
| /* Data for if/else/endif and bgnloop/endloop control flow structures. |
| */ |
| struct ac_llvm_flow { |
| /* Loop exit or next part of if/else/endif. */ |
| LLVMBasicBlockRef next_block; |
| LLVMBasicBlockRef loop_entry_block; |
| }; |
| |
| /* Initialize module-independent parts of the context. |
| * |
| * The caller is responsible for initializing ctx::module and ctx::builder. |
| */ |
| void |
| ac_llvm_context_init(struct ac_llvm_context *ctx, LLVMContextRef context, |
| enum chip_class chip_class, enum radeon_family family) |
| { |
| LLVMValueRef args[1]; |
| |
| ctx->chip_class = chip_class; |
| ctx->family = family; |
| |
| ctx->context = context; |
| ctx->module = NULL; |
| ctx->builder = NULL; |
| |
| ctx->voidt = LLVMVoidTypeInContext(ctx->context); |
| ctx->i1 = LLVMInt1TypeInContext(ctx->context); |
| ctx->i8 = LLVMInt8TypeInContext(ctx->context); |
| ctx->i16 = LLVMIntTypeInContext(ctx->context, 16); |
| ctx->i32 = LLVMIntTypeInContext(ctx->context, 32); |
| ctx->i64 = LLVMIntTypeInContext(ctx->context, 64); |
| ctx->f16 = LLVMHalfTypeInContext(ctx->context); |
| ctx->f32 = LLVMFloatTypeInContext(ctx->context); |
| ctx->f64 = LLVMDoubleTypeInContext(ctx->context); |
| ctx->v2i32 = LLVMVectorType(ctx->i32, 2); |
| ctx->v3i32 = LLVMVectorType(ctx->i32, 3); |
| ctx->v4i32 = LLVMVectorType(ctx->i32, 4); |
| ctx->v2f32 = LLVMVectorType(ctx->f32, 2); |
| ctx->v4f32 = LLVMVectorType(ctx->f32, 4); |
| ctx->v8i32 = LLVMVectorType(ctx->i32, 8); |
| |
| ctx->i32_0 = LLVMConstInt(ctx->i32, 0, false); |
| ctx->i32_1 = LLVMConstInt(ctx->i32, 1, false); |
| ctx->i64_0 = LLVMConstInt(ctx->i64, 0, false); |
| ctx->i64_1 = LLVMConstInt(ctx->i64, 1, false); |
| ctx->f32_0 = LLVMConstReal(ctx->f32, 0.0); |
| ctx->f32_1 = LLVMConstReal(ctx->f32, 1.0); |
| ctx->f64_0 = LLVMConstReal(ctx->f64, 0.0); |
| ctx->f64_1 = LLVMConstReal(ctx->f64, 1.0); |
| |
| ctx->i1false = LLVMConstInt(ctx->i1, 0, false); |
| ctx->i1true = LLVMConstInt(ctx->i1, 1, false); |
| |
| ctx->range_md_kind = LLVMGetMDKindIDInContext(ctx->context, |
| "range", 5); |
| |
| ctx->invariant_load_md_kind = LLVMGetMDKindIDInContext(ctx->context, |
| "invariant.load", 14); |
| |
| ctx->fpmath_md_kind = LLVMGetMDKindIDInContext(ctx->context, "fpmath", 6); |
| |
| args[0] = LLVMConstReal(ctx->f32, 2.5); |
| ctx->fpmath_md_2p5_ulp = LLVMMDNodeInContext(ctx->context, args, 1); |
| |
| ctx->uniform_md_kind = LLVMGetMDKindIDInContext(ctx->context, |
| "amdgpu.uniform", 14); |
| |
| ctx->empty_md = LLVMMDNodeInContext(ctx->context, NULL, 0); |
| } |
| |
| void |
| ac_llvm_context_dispose(struct ac_llvm_context *ctx) |
| { |
| free(ctx->flow); |
| ctx->flow = NULL; |
| ctx->flow_depth_max = 0; |
| } |
| |
| int |
| ac_get_llvm_num_components(LLVMValueRef value) |
| { |
| LLVMTypeRef type = LLVMTypeOf(value); |
| unsigned num_components = LLVMGetTypeKind(type) == LLVMVectorTypeKind |
| ? LLVMGetVectorSize(type) |
| : 1; |
| return num_components; |
| } |
| |
| LLVMValueRef |
| ac_llvm_extract_elem(struct ac_llvm_context *ac, |
| LLVMValueRef value, |
| int index) |
| { |
| if (LLVMGetTypeKind(LLVMTypeOf(value)) != LLVMVectorTypeKind) { |
| assert(index == 0); |
| return value; |
| } |
| |
| return LLVMBuildExtractElement(ac->builder, value, |
| LLVMConstInt(ac->i32, index, false), ""); |
| } |
| |
| unsigned |
| ac_get_type_size(LLVMTypeRef type) |
| { |
| LLVMTypeKind kind = LLVMGetTypeKind(type); |
| |
| switch (kind) { |
| case LLVMIntegerTypeKind: |
| return LLVMGetIntTypeWidth(type) / 8; |
| case LLVMFloatTypeKind: |
| return 4; |
| case LLVMDoubleTypeKind: |
| case LLVMPointerTypeKind: |
| return 8; |
| case LLVMVectorTypeKind: |
| return LLVMGetVectorSize(type) * |
| ac_get_type_size(LLVMGetElementType(type)); |
| case LLVMArrayTypeKind: |
| return LLVMGetArrayLength(type) * |
| ac_get_type_size(LLVMGetElementType(type)); |
| default: |
| assert(0); |
| return 0; |
| } |
| } |
| |
| static LLVMTypeRef to_integer_type_scalar(struct ac_llvm_context *ctx, LLVMTypeRef t) |
| { |
| if (t == ctx->f16 || t == ctx->i16) |
| return ctx->i16; |
| else if (t == ctx->f32 || t == ctx->i32) |
| return ctx->i32; |
| else if (t == ctx->f64 || t == ctx->i64) |
| return ctx->i64; |
| else |
| unreachable("Unhandled integer size"); |
| } |
| |
| LLVMTypeRef |
| ac_to_integer_type(struct ac_llvm_context *ctx, LLVMTypeRef t) |
| { |
| if (LLVMGetTypeKind(t) == LLVMVectorTypeKind) { |
| LLVMTypeRef elem_type = LLVMGetElementType(t); |
| return LLVMVectorType(to_integer_type_scalar(ctx, elem_type), |
| LLVMGetVectorSize(t)); |
| } |
| return to_integer_type_scalar(ctx, t); |
| } |
| |
| LLVMValueRef |
| ac_to_integer(struct ac_llvm_context *ctx, LLVMValueRef v) |
| { |
| LLVMTypeRef type = LLVMTypeOf(v); |
| return LLVMBuildBitCast(ctx->builder, v, ac_to_integer_type(ctx, type), ""); |
| } |
| |
| static LLVMTypeRef to_float_type_scalar(struct ac_llvm_context *ctx, LLVMTypeRef t) |
| { |
| if (t == ctx->i16 || t == ctx->f16) |
| return ctx->f16; |
| else if (t == ctx->i32 || t == ctx->f32) |
| return ctx->f32; |
| else if (t == ctx->i64 || t == ctx->f64) |
| return ctx->f64; |
| else |
| unreachable("Unhandled float size"); |
| } |
| |
| LLVMTypeRef |
| ac_to_float_type(struct ac_llvm_context *ctx, LLVMTypeRef t) |
| { |
| if (LLVMGetTypeKind(t) == LLVMVectorTypeKind) { |
| LLVMTypeRef elem_type = LLVMGetElementType(t); |
| return LLVMVectorType(to_float_type_scalar(ctx, elem_type), |
| LLVMGetVectorSize(t)); |
| } |
| return to_float_type_scalar(ctx, t); |
| } |
| |
| LLVMValueRef |
| ac_to_float(struct ac_llvm_context *ctx, LLVMValueRef v) |
| { |
| LLVMTypeRef type = LLVMTypeOf(v); |
| return LLVMBuildBitCast(ctx->builder, v, ac_to_float_type(ctx, type), ""); |
| } |
| |
| |
| LLVMValueRef |
| ac_build_intrinsic(struct ac_llvm_context *ctx, const char *name, |
| LLVMTypeRef return_type, LLVMValueRef *params, |
| unsigned param_count, unsigned attrib_mask) |
| { |
| LLVMValueRef function, call; |
| bool set_callsite_attrs = HAVE_LLVM >= 0x0400 && |
| !(attrib_mask & AC_FUNC_ATTR_LEGACY); |
| |
| function = LLVMGetNamedFunction(ctx->module, name); |
| if (!function) { |
| LLVMTypeRef param_types[32], function_type; |
| unsigned i; |
| |
| assert(param_count <= 32); |
| |
| for (i = 0; i < param_count; ++i) { |
| assert(params[i]); |
| param_types[i] = LLVMTypeOf(params[i]); |
| } |
| function_type = |
| LLVMFunctionType(return_type, param_types, param_count, 0); |
| function = LLVMAddFunction(ctx->module, name, function_type); |
| |
| LLVMSetFunctionCallConv(function, LLVMCCallConv); |
| LLVMSetLinkage(function, LLVMExternalLinkage); |
| |
| if (!set_callsite_attrs) |
| ac_add_func_attributes(ctx->context, function, attrib_mask); |
| } |
| |
| call = LLVMBuildCall(ctx->builder, function, params, param_count, ""); |
| if (set_callsite_attrs) |
| ac_add_func_attributes(ctx->context, call, attrib_mask); |
| return call; |
| } |
| |
| /** |
| * Given the i32 or vNi32 \p type, generate the textual name (e.g. for use with |
| * intrinsic names). |
| */ |
| void ac_build_type_name_for_intr(LLVMTypeRef type, char *buf, unsigned bufsize) |
| { |
| LLVMTypeRef elem_type = type; |
| |
| assert(bufsize >= 8); |
| |
| if (LLVMGetTypeKind(type) == LLVMVectorTypeKind) { |
| int ret = snprintf(buf, bufsize, "v%u", |
| LLVMGetVectorSize(type)); |
| if (ret < 0) { |
| char *type_name = LLVMPrintTypeToString(type); |
| fprintf(stderr, "Error building type name for: %s\n", |
| type_name); |
| return; |
| } |
| elem_type = LLVMGetElementType(type); |
| buf += ret; |
| bufsize -= ret; |
| } |
| switch (LLVMGetTypeKind(elem_type)) { |
| default: break; |
| case LLVMIntegerTypeKind: |
| snprintf(buf, bufsize, "i%d", LLVMGetIntTypeWidth(elem_type)); |
| break; |
| case LLVMFloatTypeKind: |
| snprintf(buf, bufsize, "f32"); |
| break; |
| case LLVMDoubleTypeKind: |
| snprintf(buf, bufsize, "f64"); |
| break; |
| } |
| } |
| |
| /** |
| * Helper function that builds an LLVM IR PHI node and immediately adds |
| * incoming edges. |
| */ |
| LLVMValueRef |
| ac_build_phi(struct ac_llvm_context *ctx, LLVMTypeRef type, |
| unsigned count_incoming, LLVMValueRef *values, |
| LLVMBasicBlockRef *blocks) |
| { |
| LLVMValueRef phi = LLVMBuildPhi(ctx->builder, type, ""); |
| LLVMAddIncoming(phi, values, blocks, count_incoming); |
| return phi; |
| } |
| |
| /* Prevent optimizations (at least of memory accesses) across the current |
| * point in the program by emitting empty inline assembly that is marked as |
| * having side effects. |
| * |
| * Optionally, a value can be passed through the inline assembly to prevent |
| * LLVM from hoisting calls to ReadNone functions. |
| */ |
| void |
| ac_build_optimization_barrier(struct ac_llvm_context *ctx, |
| LLVMValueRef *pvgpr) |
| { |
| static int counter = 0; |
| |
| LLVMBuilderRef builder = ctx->builder; |
| char code[16]; |
| |
| snprintf(code, sizeof(code), "; %d", p_atomic_inc_return(&counter)); |
| |
| if (!pvgpr) { |
| LLVMTypeRef ftype = LLVMFunctionType(ctx->voidt, NULL, 0, false); |
| LLVMValueRef inlineasm = LLVMConstInlineAsm(ftype, code, "", true, false); |
| LLVMBuildCall(builder, inlineasm, NULL, 0, ""); |
| } else { |
| LLVMTypeRef ftype = LLVMFunctionType(ctx->i32, &ctx->i32, 1, false); |
| LLVMValueRef inlineasm = LLVMConstInlineAsm(ftype, code, "=v,0", true, false); |
| LLVMValueRef vgpr = *pvgpr; |
| LLVMTypeRef vgpr_type = LLVMTypeOf(vgpr); |
| unsigned vgpr_size = ac_get_type_size(vgpr_type); |
| LLVMValueRef vgpr0; |
| |
| assert(vgpr_size % 4 == 0); |
| |
| vgpr = LLVMBuildBitCast(builder, vgpr, LLVMVectorType(ctx->i32, vgpr_size / 4), ""); |
| vgpr0 = LLVMBuildExtractElement(builder, vgpr, ctx->i32_0, ""); |
| vgpr0 = LLVMBuildCall(builder, inlineasm, &vgpr0, 1, ""); |
| vgpr = LLVMBuildInsertElement(builder, vgpr, vgpr0, ctx->i32_0, ""); |
| vgpr = LLVMBuildBitCast(builder, vgpr, vgpr_type, ""); |
| |
| *pvgpr = vgpr; |
| } |
| } |
| |
| LLVMValueRef |
| ac_build_ballot(struct ac_llvm_context *ctx, |
| LLVMValueRef value) |
| { |
| LLVMValueRef args[3] = { |
| value, |
| ctx->i32_0, |
| LLVMConstInt(ctx->i32, LLVMIntNE, 0) |
| }; |
| |
| /* We currently have no other way to prevent LLVM from lifting the icmp |
| * calls to a dominating basic block. |
| */ |
| ac_build_optimization_barrier(ctx, &args[0]); |
| |
| if (LLVMTypeOf(args[0]) != ctx->i32) |
| args[0] = LLVMBuildBitCast(ctx->builder, args[0], ctx->i32, ""); |
| |
| return ac_build_intrinsic(ctx, |
| "llvm.amdgcn.icmp.i32", |
| ctx->i64, args, 3, |
| AC_FUNC_ATTR_NOUNWIND | |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_CONVERGENT); |
| } |
| |
| LLVMValueRef |
| ac_build_vote_all(struct ac_llvm_context *ctx, LLVMValueRef value) |
| { |
| LLVMValueRef active_set = ac_build_ballot(ctx, ctx->i32_1); |
| LLVMValueRef vote_set = ac_build_ballot(ctx, value); |
| return LLVMBuildICmp(ctx->builder, LLVMIntEQ, vote_set, active_set, ""); |
| } |
| |
| LLVMValueRef |
| ac_build_vote_any(struct ac_llvm_context *ctx, LLVMValueRef value) |
| { |
| LLVMValueRef vote_set = ac_build_ballot(ctx, value); |
| return LLVMBuildICmp(ctx->builder, LLVMIntNE, vote_set, |
| LLVMConstInt(ctx->i64, 0, 0), ""); |
| } |
| |
| LLVMValueRef |
| ac_build_vote_eq(struct ac_llvm_context *ctx, LLVMValueRef value) |
| { |
| LLVMValueRef active_set = ac_build_ballot(ctx, ctx->i32_1); |
| LLVMValueRef vote_set = ac_build_ballot(ctx, value); |
| |
| LLVMValueRef all = LLVMBuildICmp(ctx->builder, LLVMIntEQ, |
| vote_set, active_set, ""); |
| LLVMValueRef none = LLVMBuildICmp(ctx->builder, LLVMIntEQ, |
| vote_set, |
| LLVMConstInt(ctx->i64, 0, 0), ""); |
| return LLVMBuildOr(ctx->builder, all, none, ""); |
| } |
| |
| LLVMValueRef |
| ac_build_varying_gather_values(struct ac_llvm_context *ctx, LLVMValueRef *values, |
| unsigned value_count, unsigned component) |
| { |
| LLVMValueRef vec = NULL; |
| |
| if (value_count == 1) { |
| return values[component]; |
| } else if (!value_count) |
| unreachable("value_count is 0"); |
| |
| for (unsigned i = component; i < value_count + component; i++) { |
| LLVMValueRef value = values[i]; |
| |
| if (i == component) |
| vec = LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value), value_count)); |
| LLVMValueRef index = LLVMConstInt(ctx->i32, i - component, false); |
| vec = LLVMBuildInsertElement(ctx->builder, vec, value, index, ""); |
| } |
| return vec; |
| } |
| |
| LLVMValueRef |
| ac_build_gather_values_extended(struct ac_llvm_context *ctx, |
| LLVMValueRef *values, |
| unsigned value_count, |
| unsigned value_stride, |
| bool load, |
| bool always_vector) |
| { |
| LLVMBuilderRef builder = ctx->builder; |
| LLVMValueRef vec = NULL; |
| unsigned i; |
| |
| if (value_count == 1 && !always_vector) { |
| if (load) |
| return LLVMBuildLoad(builder, values[0], ""); |
| return values[0]; |
| } else if (!value_count) |
| unreachable("value_count is 0"); |
| |
| for (i = 0; i < value_count; i++) { |
| LLVMValueRef value = values[i * value_stride]; |
| if (load) |
| value = LLVMBuildLoad(builder, value, ""); |
| |
| if (!i) |
| vec = LLVMGetUndef( LLVMVectorType(LLVMTypeOf(value), value_count)); |
| LLVMValueRef index = LLVMConstInt(ctx->i32, i, false); |
| vec = LLVMBuildInsertElement(builder, vec, value, index, ""); |
| } |
| return vec; |
| } |
| |
| LLVMValueRef |
| ac_build_gather_values(struct ac_llvm_context *ctx, |
| LLVMValueRef *values, |
| unsigned value_count) |
| { |
| return ac_build_gather_values_extended(ctx, values, value_count, 1, false, false); |
| } |
| |
| LLVMValueRef |
| ac_build_fdiv(struct ac_llvm_context *ctx, |
| LLVMValueRef num, |
| LLVMValueRef den) |
| { |
| LLVMValueRef ret = LLVMBuildFDiv(ctx->builder, num, den, ""); |
| |
| /* Use v_rcp_f32 instead of precise division. */ |
| if (!LLVMIsConstant(ret)) |
| LLVMSetMetadata(ret, ctx->fpmath_md_kind, ctx->fpmath_md_2p5_ulp); |
| return ret; |
| } |
| |
| /* Coordinates for cube map selection. sc, tc, and ma are as in Table 8.27 |
| * of the OpenGL 4.5 (Compatibility Profile) specification, except ma is |
| * already multiplied by two. id is the cube face number. |
| */ |
| struct cube_selection_coords { |
| LLVMValueRef stc[2]; |
| LLVMValueRef ma; |
| LLVMValueRef id; |
| }; |
| |
| static void |
| build_cube_intrinsic(struct ac_llvm_context *ctx, |
| LLVMValueRef in[3], |
| struct cube_selection_coords *out) |
| { |
| LLVMTypeRef f32 = ctx->f32; |
| |
| out->stc[1] = ac_build_intrinsic(ctx, "llvm.amdgcn.cubetc", |
| f32, in, 3, AC_FUNC_ATTR_READNONE); |
| out->stc[0] = ac_build_intrinsic(ctx, "llvm.amdgcn.cubesc", |
| f32, in, 3, AC_FUNC_ATTR_READNONE); |
| out->ma = ac_build_intrinsic(ctx, "llvm.amdgcn.cubema", |
| f32, in, 3, AC_FUNC_ATTR_READNONE); |
| out->id = ac_build_intrinsic(ctx, "llvm.amdgcn.cubeid", |
| f32, in, 3, AC_FUNC_ATTR_READNONE); |
| } |
| |
| /** |
| * Build a manual selection sequence for cube face sc/tc coordinates and |
| * major axis vector (multiplied by 2 for consistency) for the given |
| * vec3 \p coords, for the face implied by \p selcoords. |
| * |
| * For the major axis, we always adjust the sign to be in the direction of |
| * selcoords.ma; i.e., a positive out_ma means that coords is pointed towards |
| * the selcoords major axis. |
| */ |
| static void build_cube_select(struct ac_llvm_context *ctx, |
| const struct cube_selection_coords *selcoords, |
| const LLVMValueRef *coords, |
| LLVMValueRef *out_st, |
| LLVMValueRef *out_ma) |
| { |
| LLVMBuilderRef builder = ctx->builder; |
| LLVMTypeRef f32 = LLVMTypeOf(coords[0]); |
| LLVMValueRef is_ma_positive; |
| LLVMValueRef sgn_ma; |
| LLVMValueRef is_ma_z, is_not_ma_z; |
| LLVMValueRef is_ma_y; |
| LLVMValueRef is_ma_x; |
| LLVMValueRef sgn; |
| LLVMValueRef tmp; |
| |
| is_ma_positive = LLVMBuildFCmp(builder, LLVMRealUGE, |
| selcoords->ma, LLVMConstReal(f32, 0.0), ""); |
| sgn_ma = LLVMBuildSelect(builder, is_ma_positive, |
| LLVMConstReal(f32, 1.0), LLVMConstReal(f32, -1.0), ""); |
| |
| is_ma_z = LLVMBuildFCmp(builder, LLVMRealUGE, selcoords->id, LLVMConstReal(f32, 4.0), ""); |
| is_not_ma_z = LLVMBuildNot(builder, is_ma_z, ""); |
| is_ma_y = LLVMBuildAnd(builder, is_not_ma_z, |
| LLVMBuildFCmp(builder, LLVMRealUGE, selcoords->id, LLVMConstReal(f32, 2.0), ""), ""); |
| is_ma_x = LLVMBuildAnd(builder, is_not_ma_z, LLVMBuildNot(builder, is_ma_y, ""), ""); |
| |
| /* Select sc */ |
| tmp = LLVMBuildSelect(builder, is_ma_x, coords[2], coords[0], ""); |
| sgn = LLVMBuildSelect(builder, is_ma_y, LLVMConstReal(f32, 1.0), |
| LLVMBuildSelect(builder, is_ma_z, sgn_ma, |
| LLVMBuildFNeg(builder, sgn_ma, ""), ""), ""); |
| out_st[0] = LLVMBuildFMul(builder, tmp, sgn, ""); |
| |
| /* Select tc */ |
| tmp = LLVMBuildSelect(builder, is_ma_y, coords[2], coords[1], ""); |
| sgn = LLVMBuildSelect(builder, is_ma_y, sgn_ma, |
| LLVMConstReal(f32, -1.0), ""); |
| out_st[1] = LLVMBuildFMul(builder, tmp, sgn, ""); |
| |
| /* Select ma */ |
| tmp = LLVMBuildSelect(builder, is_ma_z, coords[2], |
| LLVMBuildSelect(builder, is_ma_y, coords[1], coords[0], ""), ""); |
| tmp = ac_build_intrinsic(ctx, "llvm.fabs.f32", |
| ctx->f32, &tmp, 1, AC_FUNC_ATTR_READNONE); |
| *out_ma = LLVMBuildFMul(builder, tmp, LLVMConstReal(f32, 2.0), ""); |
| } |
| |
| void |
| ac_prepare_cube_coords(struct ac_llvm_context *ctx, |
| bool is_deriv, bool is_array, bool is_lod, |
| LLVMValueRef *coords_arg, |
| LLVMValueRef *derivs_arg) |
| { |
| |
| LLVMBuilderRef builder = ctx->builder; |
| struct cube_selection_coords selcoords; |
| LLVMValueRef coords[3]; |
| LLVMValueRef invma; |
| |
| if (is_array && !is_lod) { |
| LLVMValueRef tmp = coords_arg[3]; |
| tmp = ac_build_intrinsic(ctx, "llvm.rint.f32", ctx->f32, &tmp, 1, 0); |
| |
| /* Section 8.9 (Texture Functions) of the GLSL 4.50 spec says: |
| * |
| * "For Array forms, the array layer used will be |
| * |
| * max(0, min(d−1, floor(layer+0.5))) |
| * |
| * where d is the depth of the texture array and layer |
| * comes from the component indicated in the tables below. |
| * Workaroudn for an issue where the layer is taken from a |
| * helper invocation which happens to fall on a different |
| * layer due to extrapolation." |
| * |
| * VI and earlier attempt to implement this in hardware by |
| * clamping the value of coords[2] = (8 * layer) + face. |
| * Unfortunately, this means that the we end up with the wrong |
| * face when clamping occurs. |
| * |
| * Clamp the layer earlier to work around the issue. |
| */ |
| if (ctx->chip_class <= VI) { |
| LLVMValueRef ge0; |
| ge0 = LLVMBuildFCmp(builder, LLVMRealOGE, tmp, ctx->f32_0, ""); |
| tmp = LLVMBuildSelect(builder, ge0, tmp, ctx->f32_0, ""); |
| } |
| |
| coords_arg[3] = tmp; |
| } |
| |
| build_cube_intrinsic(ctx, coords_arg, &selcoords); |
| |
| invma = ac_build_intrinsic(ctx, "llvm.fabs.f32", |
| ctx->f32, &selcoords.ma, 1, AC_FUNC_ATTR_READNONE); |
| invma = ac_build_fdiv(ctx, LLVMConstReal(ctx->f32, 1.0), invma); |
| |
| for (int i = 0; i < 2; ++i) |
| coords[i] = LLVMBuildFMul(builder, selcoords.stc[i], invma, ""); |
| |
| coords[2] = selcoords.id; |
| |
| if (is_deriv && derivs_arg) { |
| LLVMValueRef derivs[4]; |
| int axis; |
| |
| /* Convert cube derivatives to 2D derivatives. */ |
| for (axis = 0; axis < 2; axis++) { |
| LLVMValueRef deriv_st[2]; |
| LLVMValueRef deriv_ma; |
| |
| /* Transform the derivative alongside the texture |
| * coordinate. Mathematically, the correct formula is |
| * as follows. Assume we're projecting onto the +Z face |
| * and denote by dx/dh the derivative of the (original) |
| * X texture coordinate with respect to horizontal |
| * window coordinates. The projection onto the +Z face |
| * plane is: |
| * |
| * f(x,z) = x/z |
| * |
| * Then df/dh = df/dx * dx/dh + df/dz * dz/dh |
| * = 1/z * dx/dh - x/z * 1/z * dz/dh. |
| * |
| * This motivatives the implementation below. |
| * |
| * Whether this actually gives the expected results for |
| * apps that might feed in derivatives obtained via |
| * finite differences is anyone's guess. The OpenGL spec |
| * seems awfully quiet about how textureGrad for cube |
| * maps should be handled. |
| */ |
| build_cube_select(ctx, &selcoords, &derivs_arg[axis * 3], |
| deriv_st, &deriv_ma); |
| |
| deriv_ma = LLVMBuildFMul(builder, deriv_ma, invma, ""); |
| |
| for (int i = 0; i < 2; ++i) |
| derivs[axis * 2 + i] = |
| LLVMBuildFSub(builder, |
| LLVMBuildFMul(builder, deriv_st[i], invma, ""), |
| LLVMBuildFMul(builder, deriv_ma, coords[i], ""), ""); |
| } |
| |
| memcpy(derivs_arg, derivs, sizeof(derivs)); |
| } |
| |
| /* Shift the texture coordinate. This must be applied after the |
| * derivative calculation. |
| */ |
| for (int i = 0; i < 2; ++i) |
| coords[i] = LLVMBuildFAdd(builder, coords[i], LLVMConstReal(ctx->f32, 1.5), ""); |
| |
| if (is_array) { |
| /* for cube arrays coord.z = coord.w(array_index) * 8 + face */ |
| /* coords_arg.w component - array_index for cube arrays */ |
| LLVMValueRef tmp = LLVMBuildFMul(ctx->builder, coords_arg[3], LLVMConstReal(ctx->f32, 8.0), ""); |
| coords[2] = LLVMBuildFAdd(ctx->builder, tmp, coords[2], ""); |
| } |
| |
| memcpy(coords_arg, coords, sizeof(coords)); |
| } |
| |
| |
| LLVMValueRef |
| ac_build_fs_interp(struct ac_llvm_context *ctx, |
| LLVMValueRef llvm_chan, |
| LLVMValueRef attr_number, |
| LLVMValueRef params, |
| LLVMValueRef i, |
| LLVMValueRef j) |
| { |
| LLVMValueRef args[5]; |
| LLVMValueRef p1; |
| |
| if (HAVE_LLVM < 0x0400) { |
| LLVMValueRef ij[2]; |
| ij[0] = LLVMBuildBitCast(ctx->builder, i, ctx->i32, ""); |
| ij[1] = LLVMBuildBitCast(ctx->builder, j, ctx->i32, ""); |
| |
| args[0] = llvm_chan; |
| args[1] = attr_number; |
| args[2] = params; |
| args[3] = ac_build_gather_values(ctx, ij, 2); |
| return ac_build_intrinsic(ctx, "llvm.SI.fs.interp", |
| ctx->f32, args, 4, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| args[0] = i; |
| args[1] = llvm_chan; |
| args[2] = attr_number; |
| args[3] = params; |
| |
| p1 = ac_build_intrinsic(ctx, "llvm.amdgcn.interp.p1", |
| ctx->f32, args, 4, AC_FUNC_ATTR_READNONE); |
| |
| args[0] = p1; |
| args[1] = j; |
| args[2] = llvm_chan; |
| args[3] = attr_number; |
| args[4] = params; |
| |
| return ac_build_intrinsic(ctx, "llvm.amdgcn.interp.p2", |
| ctx->f32, args, 5, AC_FUNC_ATTR_READNONE); |
| } |
| |
| LLVMValueRef |
| ac_build_fs_interp_mov(struct ac_llvm_context *ctx, |
| LLVMValueRef parameter, |
| LLVMValueRef llvm_chan, |
| LLVMValueRef attr_number, |
| LLVMValueRef params) |
| { |
| LLVMValueRef args[4]; |
| if (HAVE_LLVM < 0x0400) { |
| args[0] = llvm_chan; |
| args[1] = attr_number; |
| args[2] = params; |
| |
| return ac_build_intrinsic(ctx, |
| "llvm.SI.fs.constant", |
| ctx->f32, args, 3, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| args[0] = parameter; |
| args[1] = llvm_chan; |
| args[2] = attr_number; |
| args[3] = params; |
| |
| return ac_build_intrinsic(ctx, "llvm.amdgcn.interp.mov", |
| ctx->f32, args, 4, AC_FUNC_ATTR_READNONE); |
| } |
| |
| LLVMValueRef |
| ac_build_gep0(struct ac_llvm_context *ctx, |
| LLVMValueRef base_ptr, |
| LLVMValueRef index) |
| { |
| LLVMValueRef indices[2] = { |
| LLVMConstInt(ctx->i32, 0, 0), |
| index, |
| }; |
| return LLVMBuildGEP(ctx->builder, base_ptr, |
| indices, 2, ""); |
| } |
| |
| void |
| ac_build_indexed_store(struct ac_llvm_context *ctx, |
| LLVMValueRef base_ptr, LLVMValueRef index, |
| LLVMValueRef value) |
| { |
| LLVMBuildStore(ctx->builder, value, |
| ac_build_gep0(ctx, base_ptr, index)); |
| } |
| |
| /** |
| * Build an LLVM bytecode indexed load using LLVMBuildGEP + LLVMBuildLoad. |
| * It's equivalent to doing a load from &base_ptr[index]. |
| * |
| * \param base_ptr Where the array starts. |
| * \param index The element index into the array. |
| * \param uniform Whether the base_ptr and index can be assumed to be |
| * dynamically uniform (i.e. load to an SGPR) |
| * \param invariant Whether the load is invariant (no other opcodes affect it) |
| */ |
| static LLVMValueRef |
| ac_build_load_custom(struct ac_llvm_context *ctx, LLVMValueRef base_ptr, |
| LLVMValueRef index, bool uniform, bool invariant) |
| { |
| LLVMValueRef pointer, result; |
| |
| pointer = ac_build_gep0(ctx, base_ptr, index); |
| if (uniform) |
| LLVMSetMetadata(pointer, ctx->uniform_md_kind, ctx->empty_md); |
| result = LLVMBuildLoad(ctx->builder, pointer, ""); |
| if (invariant) |
| LLVMSetMetadata(result, ctx->invariant_load_md_kind, ctx->empty_md); |
| return result; |
| } |
| |
| LLVMValueRef ac_build_load(struct ac_llvm_context *ctx, LLVMValueRef base_ptr, |
| LLVMValueRef index) |
| { |
| return ac_build_load_custom(ctx, base_ptr, index, false, false); |
| } |
| |
| LLVMValueRef ac_build_load_invariant(struct ac_llvm_context *ctx, |
| LLVMValueRef base_ptr, LLVMValueRef index) |
| { |
| return ac_build_load_custom(ctx, base_ptr, index, false, true); |
| } |
| |
| LLVMValueRef ac_build_load_to_sgpr(struct ac_llvm_context *ctx, |
| LLVMValueRef base_ptr, LLVMValueRef index) |
| { |
| return ac_build_load_custom(ctx, base_ptr, index, true, true); |
| } |
| |
| /* TBUFFER_STORE_FORMAT_{X,XY,XYZ,XYZW} <- the suffix is selected by num_channels=1..4. |
| * The type of vdata must be one of i32 (num_channels=1), v2i32 (num_channels=2), |
| * or v4i32 (num_channels=3,4). |
| */ |
| void |
| ac_build_buffer_store_dword(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vdata, |
| unsigned num_channels, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| unsigned inst_offset, |
| bool glc, |
| bool slc, |
| bool writeonly_memory, |
| bool swizzle_enable_hint) |
| { |
| /* SWIZZLE_ENABLE requires that soffset isn't folded into voffset |
| * (voffset is swizzled, but soffset isn't swizzled). |
| * llvm.amdgcn.buffer.store doesn't have a separate soffset parameter. |
| */ |
| if (!swizzle_enable_hint) { |
| /* Split 3 channel stores, becase LLVM doesn't support 3-channel |
| * intrinsics. */ |
| if (num_channels == 3) { |
| LLVMValueRef v[3], v01; |
| |
| for (int i = 0; i < 3; i++) { |
| v[i] = LLVMBuildExtractElement(ctx->builder, vdata, |
| LLVMConstInt(ctx->i32, i, 0), ""); |
| } |
| v01 = ac_build_gather_values(ctx, v, 2); |
| |
| ac_build_buffer_store_dword(ctx, rsrc, v01, 2, voffset, |
| soffset, inst_offset, glc, slc, |
| writeonly_memory, swizzle_enable_hint); |
| ac_build_buffer_store_dword(ctx, rsrc, v[2], 1, voffset, |
| soffset, inst_offset + 8, |
| glc, slc, |
| writeonly_memory, swizzle_enable_hint); |
| return; |
| } |
| |
| unsigned func = CLAMP(num_channels, 1, 3) - 1; |
| static const char *types[] = {"f32", "v2f32", "v4f32"}; |
| char name[256]; |
| LLVMValueRef offset = soffset; |
| |
| if (inst_offset) |
| offset = LLVMBuildAdd(ctx->builder, offset, |
| LLVMConstInt(ctx->i32, inst_offset, 0), ""); |
| if (voffset) |
| offset = LLVMBuildAdd(ctx->builder, offset, voffset, ""); |
| |
| LLVMValueRef args[] = { |
| ac_to_float(ctx, vdata), |
| LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, ""), |
| LLVMConstInt(ctx->i32, 0, 0), |
| offset, |
| LLVMConstInt(ctx->i1, glc, 0), |
| LLVMConstInt(ctx->i1, slc, 0), |
| }; |
| |
| snprintf(name, sizeof(name), "llvm.amdgcn.buffer.store.%s", |
| types[func]); |
| |
| ac_build_intrinsic(ctx, name, ctx->voidt, |
| args, ARRAY_SIZE(args), |
| writeonly_memory ? |
| AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY : |
| AC_FUNC_ATTR_WRITEONLY); |
| return; |
| } |
| |
| static unsigned dfmt[] = { |
| V_008F0C_BUF_DATA_FORMAT_32, |
| V_008F0C_BUF_DATA_FORMAT_32_32, |
| V_008F0C_BUF_DATA_FORMAT_32_32_32, |
| V_008F0C_BUF_DATA_FORMAT_32_32_32_32 |
| }; |
| assert(num_channels >= 1 && num_channels <= 4); |
| |
| LLVMValueRef args[] = { |
| rsrc, |
| vdata, |
| LLVMConstInt(ctx->i32, num_channels, 0), |
| voffset ? voffset : LLVMGetUndef(ctx->i32), |
| soffset, |
| LLVMConstInt(ctx->i32, inst_offset, 0), |
| LLVMConstInt(ctx->i32, dfmt[num_channels - 1], 0), |
| LLVMConstInt(ctx->i32, V_008F0C_BUF_NUM_FORMAT_UINT, 0), |
| LLVMConstInt(ctx->i32, voffset != NULL, 0), |
| LLVMConstInt(ctx->i32, 0, 0), /* idxen */ |
| LLVMConstInt(ctx->i32, glc, 0), |
| LLVMConstInt(ctx->i32, slc, 0), |
| LLVMConstInt(ctx->i32, 0, 0), /* tfe*/ |
| }; |
| |
| /* The instruction offset field has 12 bits */ |
| assert(voffset || inst_offset < (1 << 12)); |
| |
| /* The intrinsic is overloaded, we need to add a type suffix for overloading to work. */ |
| unsigned func = CLAMP(num_channels, 1, 3) - 1; |
| const char *types[] = {"i32", "v2i32", "v4i32"}; |
| char name[256]; |
| snprintf(name, sizeof(name), "llvm.SI.tbuffer.store.%s", types[func]); |
| |
| ac_build_intrinsic(ctx, name, ctx->voidt, |
| args, ARRAY_SIZE(args), |
| AC_FUNC_ATTR_LEGACY); |
| } |
| |
| LLVMValueRef |
| ac_build_buffer_load(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| int num_channels, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| unsigned inst_offset, |
| unsigned glc, |
| unsigned slc, |
| bool can_speculate, |
| bool allow_smem) |
| { |
| LLVMValueRef offset = LLVMConstInt(ctx->i32, inst_offset, 0); |
| if (voffset) |
| offset = LLVMBuildAdd(ctx->builder, offset, voffset, ""); |
| if (soffset) |
| offset = LLVMBuildAdd(ctx->builder, offset, soffset, ""); |
| |
| /* TODO: VI and later generations can use SMEM with GLC=1.*/ |
| if (allow_smem && !glc && !slc) { |
| assert(vindex == NULL); |
| |
| LLVMValueRef result[4]; |
| |
| for (int i = 0; i < num_channels; i++) { |
| if (i) { |
| offset = LLVMBuildAdd(ctx->builder, offset, |
| LLVMConstInt(ctx->i32, 4, 0), ""); |
| } |
| LLVMValueRef args[2] = {rsrc, offset}; |
| result[i] = ac_build_intrinsic(ctx, "llvm.SI.load.const.v4i32", |
| ctx->f32, args, 2, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_LEGACY); |
| } |
| if (num_channels == 1) |
| return result[0]; |
| |
| if (num_channels == 3) |
| result[num_channels++] = LLVMGetUndef(ctx->f32); |
| return ac_build_gather_values(ctx, result, num_channels); |
| } |
| |
| unsigned func = CLAMP(num_channels, 1, 3) - 1; |
| |
| LLVMValueRef args[] = { |
| LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, ""), |
| vindex ? vindex : LLVMConstInt(ctx->i32, 0, 0), |
| offset, |
| LLVMConstInt(ctx->i1, glc, 0), |
| LLVMConstInt(ctx->i1, slc, 0) |
| }; |
| |
| LLVMTypeRef types[] = {ctx->f32, LLVMVectorType(ctx->f32, 2), |
| ctx->v4f32}; |
| const char *type_names[] = {"f32", "v2f32", "v4f32"}; |
| char name[256]; |
| |
| snprintf(name, sizeof(name), "llvm.amdgcn.buffer.load.%s", |
| type_names[func]); |
| |
| return ac_build_intrinsic(ctx, name, types[func], args, |
| ARRAY_SIZE(args), |
| ac_get_load_intr_attribs(can_speculate)); |
| } |
| |
| LLVMValueRef ac_build_buffer_load_format(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| bool can_speculate) |
| { |
| LLVMValueRef args [] = { |
| LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, ""), |
| vindex, |
| voffset, |
| ctx->i1false, /* glc */ |
| ctx->i1false, /* slc */ |
| }; |
| |
| return ac_build_intrinsic(ctx, |
| "llvm.amdgcn.buffer.load.format.v4f32", |
| ctx->v4f32, args, ARRAY_SIZE(args), |
| ac_get_load_intr_attribs(can_speculate)); |
| } |
| |
| LLVMValueRef ac_build_buffer_load_format_gfx9_safe(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| bool can_speculate) |
| { |
| LLVMValueRef elem_count = LLVMBuildExtractElement(ctx->builder, rsrc, LLVMConstInt(ctx->i32, 2, 0), ""); |
| LLVMValueRef stride = LLVMBuildExtractElement(ctx->builder, rsrc, LLVMConstInt(ctx->i32, 1, 0), ""); |
| stride = LLVMBuildLShr(ctx->builder, stride, LLVMConstInt(ctx->i32, 16, 0), ""); |
| |
| LLVMValueRef new_elem_count = LLVMBuildSelect(ctx->builder, |
| LLVMBuildICmp(ctx->builder, LLVMIntUGT, elem_count, stride, ""), |
| elem_count, stride, ""); |
| |
| LLVMValueRef new_rsrc = LLVMBuildInsertElement(ctx->builder, rsrc, new_elem_count, |
| LLVMConstInt(ctx->i32, 2, 0), ""); |
| |
| return ac_build_buffer_load_format(ctx, new_rsrc, vindex, voffset, can_speculate); |
| } |
| |
| /** |
| * Set range metadata on an instruction. This can only be used on load and |
| * call instructions. If you know an instruction can only produce the values |
| * 0, 1, 2, you would do set_range_metadata(value, 0, 3); |
| * \p lo is the minimum value inclusive. |
| * \p hi is the maximum value exclusive. |
| */ |
| static void set_range_metadata(struct ac_llvm_context *ctx, |
| LLVMValueRef value, unsigned lo, unsigned hi) |
| { |
| LLVMValueRef range_md, md_args[2]; |
| LLVMTypeRef type = LLVMTypeOf(value); |
| LLVMContextRef context = LLVMGetTypeContext(type); |
| |
| md_args[0] = LLVMConstInt(type, lo, false); |
| md_args[1] = LLVMConstInt(type, hi, false); |
| range_md = LLVMMDNodeInContext(context, md_args, 2); |
| LLVMSetMetadata(value, ctx->range_md_kind, range_md); |
| } |
| |
| LLVMValueRef |
| ac_get_thread_id(struct ac_llvm_context *ctx) |
| { |
| LLVMValueRef tid; |
| |
| LLVMValueRef tid_args[2]; |
| tid_args[0] = LLVMConstInt(ctx->i32, 0xffffffff, false); |
| tid_args[1] = LLVMConstInt(ctx->i32, 0, false); |
| tid_args[1] = ac_build_intrinsic(ctx, |
| "llvm.amdgcn.mbcnt.lo", ctx->i32, |
| tid_args, 2, AC_FUNC_ATTR_READNONE); |
| |
| tid = ac_build_intrinsic(ctx, "llvm.amdgcn.mbcnt.hi", |
| ctx->i32, tid_args, |
| 2, AC_FUNC_ATTR_READNONE); |
| set_range_metadata(ctx, tid, 0, 64); |
| return tid; |
| } |
| |
| /* |
| * SI implements derivatives using the local data store (LDS) |
| * All writes to the LDS happen in all executing threads at |
| * the same time. TID is the Thread ID for the current |
| * thread and is a value between 0 and 63, representing |
| * the thread's position in the wavefront. |
| * |
| * For the pixel shader threads are grouped into quads of four pixels. |
| * The TIDs of the pixels of a quad are: |
| * |
| * +------+------+ |
| * |4n + 0|4n + 1| |
| * +------+------+ |
| * |4n + 2|4n + 3| |
| * +------+------+ |
| * |
| * So, masking the TID with 0xfffffffc yields the TID of the top left pixel |
| * of the quad, masking with 0xfffffffd yields the TID of the top pixel of |
| * the current pixel's column, and masking with 0xfffffffe yields the TID |
| * of the left pixel of the current pixel's row. |
| * |
| * Adding 1 yields the TID of the pixel to the right of the left pixel, and |
| * adding 2 yields the TID of the pixel below the top pixel. |
| */ |
| LLVMValueRef |
| ac_build_ddxy(struct ac_llvm_context *ctx, |
| uint32_t mask, |
| int idx, |
| LLVMValueRef val) |
| { |
| LLVMValueRef tl, trbl, args[2]; |
| LLVMValueRef result; |
| |
| if (ctx->chip_class >= VI) { |
| LLVMValueRef thread_id, tl_tid, trbl_tid; |
| thread_id = ac_get_thread_id(ctx); |
| |
| tl_tid = LLVMBuildAnd(ctx->builder, thread_id, |
| LLVMConstInt(ctx->i32, mask, false), ""); |
| |
| trbl_tid = LLVMBuildAdd(ctx->builder, tl_tid, |
| LLVMConstInt(ctx->i32, idx, false), ""); |
| |
| args[0] = LLVMBuildMul(ctx->builder, tl_tid, |
| LLVMConstInt(ctx->i32, 4, false), ""); |
| args[1] = val; |
| tl = ac_build_intrinsic(ctx, |
| "llvm.amdgcn.ds.bpermute", ctx->i32, |
| args, 2, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_CONVERGENT); |
| |
| args[0] = LLVMBuildMul(ctx->builder, trbl_tid, |
| LLVMConstInt(ctx->i32, 4, false), ""); |
| trbl = ac_build_intrinsic(ctx, |
| "llvm.amdgcn.ds.bpermute", ctx->i32, |
| args, 2, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_CONVERGENT); |
| } else { |
| uint32_t masks[2] = {}; |
| |
| switch (mask) { |
| case AC_TID_MASK_TOP_LEFT: |
| masks[0] = 0x8000; |
| if (idx == 1) |
| masks[1] = 0x8055; |
| else |
| masks[1] = 0x80aa; |
| |
| break; |
| case AC_TID_MASK_TOP: |
| masks[0] = 0x8044; |
| masks[1] = 0x80ee; |
| break; |
| case AC_TID_MASK_LEFT: |
| masks[0] = 0x80a0; |
| masks[1] = 0x80f5; |
| break; |
| default: |
| assert(0); |
| } |
| |
| args[0] = val; |
| args[1] = LLVMConstInt(ctx->i32, masks[0], false); |
| |
| tl = ac_build_intrinsic(ctx, |
| "llvm.amdgcn.ds.swizzle", ctx->i32, |
| args, 2, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_CONVERGENT); |
| |
| args[1] = LLVMConstInt(ctx->i32, masks[1], false); |
| trbl = ac_build_intrinsic(ctx, |
| "llvm.amdgcn.ds.swizzle", ctx->i32, |
| args, 2, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_CONVERGENT); |
| } |
| |
| tl = LLVMBuildBitCast(ctx->builder, tl, ctx->f32, ""); |
| trbl = LLVMBuildBitCast(ctx->builder, trbl, ctx->f32, ""); |
| result = LLVMBuildFSub(ctx->builder, trbl, tl, ""); |
| return result; |
| } |
| |
| void |
| ac_build_sendmsg(struct ac_llvm_context *ctx, |
| uint32_t msg, |
| LLVMValueRef wave_id) |
| { |
| LLVMValueRef args[2]; |
| const char *intr_name = (HAVE_LLVM < 0x0400) ? "llvm.SI.sendmsg" : "llvm.amdgcn.s.sendmsg"; |
| args[0] = LLVMConstInt(ctx->i32, msg, false); |
| args[1] = wave_id; |
| ac_build_intrinsic(ctx, intr_name, ctx->voidt, args, 2, 0); |
| } |
| |
| LLVMValueRef |
| ac_build_imsb(struct ac_llvm_context *ctx, |
| LLVMValueRef arg, |
| LLVMTypeRef dst_type) |
| { |
| const char *intr_name = (HAVE_LLVM < 0x0400) ? "llvm.AMDGPU.flbit.i32" : |
| "llvm.amdgcn.sffbh.i32"; |
| LLVMValueRef msb = ac_build_intrinsic(ctx, intr_name, |
| dst_type, &arg, 1, |
| AC_FUNC_ATTR_READNONE); |
| |
| /* The HW returns the last bit index from MSB, but NIR/TGSI wants |
| * the index from LSB. Invert it by doing "31 - msb". */ |
| msb = LLVMBuildSub(ctx->builder, LLVMConstInt(ctx->i32, 31, false), |
| msb, ""); |
| |
| LLVMValueRef all_ones = LLVMConstInt(ctx->i32, -1, true); |
| LLVMValueRef cond = LLVMBuildOr(ctx->builder, |
| LLVMBuildICmp(ctx->builder, LLVMIntEQ, |
| arg, LLVMConstInt(ctx->i32, 0, 0), ""), |
| LLVMBuildICmp(ctx->builder, LLVMIntEQ, |
| arg, all_ones, ""), ""); |
| |
| return LLVMBuildSelect(ctx->builder, cond, all_ones, msb, ""); |
| } |
| |
| LLVMValueRef |
| ac_build_umsb(struct ac_llvm_context *ctx, |
| LLVMValueRef arg, |
| LLVMTypeRef dst_type) |
| { |
| LLVMValueRef args[2] = { |
| arg, |
| ctx->i1true, |
| }; |
| LLVMValueRef msb = ac_build_intrinsic(ctx, "llvm.ctlz.i32", |
| dst_type, args, ARRAY_SIZE(args), |
| AC_FUNC_ATTR_READNONE); |
| |
| /* The HW returns the last bit index from MSB, but TGSI/NIR wants |
| * the index from LSB. Invert it by doing "31 - msb". */ |
| msb = LLVMBuildSub(ctx->builder, LLVMConstInt(ctx->i32, 31, false), |
| msb, ""); |
| |
| /* check for zero */ |
| return LLVMBuildSelect(ctx->builder, |
| LLVMBuildICmp(ctx->builder, LLVMIntEQ, arg, |
| LLVMConstInt(ctx->i32, 0, 0), ""), |
| LLVMConstInt(ctx->i32, -1, true), msb, ""); |
| } |
| |
| LLVMValueRef ac_build_fmin(struct ac_llvm_context *ctx, LLVMValueRef a, |
| LLVMValueRef b) |
| { |
| LLVMValueRef args[2] = {a, b}; |
| return ac_build_intrinsic(ctx, "llvm.minnum.f32", ctx->f32, args, 2, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| LLVMValueRef ac_build_fmax(struct ac_llvm_context *ctx, LLVMValueRef a, |
| LLVMValueRef b) |
| { |
| LLVMValueRef args[2] = {a, b}; |
| return ac_build_intrinsic(ctx, "llvm.maxnum.f32", ctx->f32, args, 2, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| LLVMValueRef ac_build_umin(struct ac_llvm_context *ctx, LLVMValueRef a, |
| LLVMValueRef b) |
| { |
| LLVMValueRef cmp = LLVMBuildICmp(ctx->builder, LLVMIntULE, a, b, ""); |
| return LLVMBuildSelect(ctx->builder, cmp, a, b, ""); |
| } |
| |
| LLVMValueRef ac_build_clamp(struct ac_llvm_context *ctx, LLVMValueRef value) |
| { |
| if (HAVE_LLVM >= 0x0500) { |
| return ac_build_fmin(ctx, ac_build_fmax(ctx, value, ctx->f32_0), |
| ctx->f32_1); |
| } |
| |
| LLVMValueRef args[3] = { |
| value, |
| LLVMConstReal(ctx->f32, 0), |
| LLVMConstReal(ctx->f32, 1), |
| }; |
| |
| return ac_build_intrinsic(ctx, "llvm.AMDGPU.clamp.", ctx->f32, args, 3, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_LEGACY); |
| } |
| |
| void ac_build_export(struct ac_llvm_context *ctx, struct ac_export_args *a) |
| { |
| LLVMValueRef args[9]; |
| |
| if (HAVE_LLVM >= 0x0500) { |
| args[0] = LLVMConstInt(ctx->i32, a->target, 0); |
| args[1] = LLVMConstInt(ctx->i32, a->enabled_channels, 0); |
| |
| if (a->compr) { |
| LLVMTypeRef i16 = LLVMInt16TypeInContext(ctx->context); |
| LLVMTypeRef v2i16 = LLVMVectorType(i16, 2); |
| |
| args[2] = LLVMBuildBitCast(ctx->builder, a->out[0], |
| v2i16, ""); |
| args[3] = LLVMBuildBitCast(ctx->builder, a->out[1], |
| v2i16, ""); |
| args[4] = LLVMConstInt(ctx->i1, a->done, 0); |
| args[5] = LLVMConstInt(ctx->i1, a->valid_mask, 0); |
| |
| ac_build_intrinsic(ctx, "llvm.amdgcn.exp.compr.v2i16", |
| ctx->voidt, args, 6, 0); |
| } else { |
| args[2] = a->out[0]; |
| args[3] = a->out[1]; |
| args[4] = a->out[2]; |
| args[5] = a->out[3]; |
| args[6] = LLVMConstInt(ctx->i1, a->done, 0); |
| args[7] = LLVMConstInt(ctx->i1, a->valid_mask, 0); |
| |
| ac_build_intrinsic(ctx, "llvm.amdgcn.exp.f32", |
| ctx->voidt, args, 8, 0); |
| } |
| return; |
| } |
| |
| args[0] = LLVMConstInt(ctx->i32, a->enabled_channels, 0); |
| args[1] = LLVMConstInt(ctx->i32, a->valid_mask, 0); |
| args[2] = LLVMConstInt(ctx->i32, a->done, 0); |
| args[3] = LLVMConstInt(ctx->i32, a->target, 0); |
| args[4] = LLVMConstInt(ctx->i32, a->compr, 0); |
| memcpy(args + 5, a->out, sizeof(a->out[0]) * 4); |
| |
| ac_build_intrinsic(ctx, "llvm.SI.export", ctx->voidt, args, 9, |
| AC_FUNC_ATTR_LEGACY); |
| } |
| |
| LLVMValueRef ac_build_image_opcode(struct ac_llvm_context *ctx, |
| struct ac_image_args *a) |
| { |
| LLVMTypeRef dst_type; |
| LLVMValueRef args[11]; |
| unsigned num_args = 0; |
| const char *name = NULL; |
| char intr_name[128], type[64]; |
| |
| if (HAVE_LLVM >= 0x0400) { |
| bool sample = a->opcode == ac_image_sample || |
| a->opcode == ac_image_gather4 || |
| a->opcode == ac_image_get_lod; |
| |
| if (sample) |
| args[num_args++] = ac_to_float(ctx, a->addr); |
| else |
| args[num_args++] = a->addr; |
| |
| args[num_args++] = a->resource; |
| if (sample) |
| args[num_args++] = a->sampler; |
| args[num_args++] = LLVMConstInt(ctx->i32, a->dmask, 0); |
| if (sample) |
| args[num_args++] = LLVMConstInt(ctx->i1, a->unorm, 0); |
| args[num_args++] = ctx->i1false; /* glc */ |
| args[num_args++] = ctx->i1false; /* slc */ |
| args[num_args++] = ctx->i1false; /* lwe */ |
| args[num_args++] = LLVMConstInt(ctx->i1, a->da, 0); |
| |
| switch (a->opcode) { |
| case ac_image_sample: |
| name = "llvm.amdgcn.image.sample"; |
| break; |
| case ac_image_gather4: |
| name = "llvm.amdgcn.image.gather4"; |
| break; |
| case ac_image_load: |
| name = "llvm.amdgcn.image.load"; |
| break; |
| case ac_image_load_mip: |
| name = "llvm.amdgcn.image.load.mip"; |
| break; |
| case ac_image_get_lod: |
| name = "llvm.amdgcn.image.getlod"; |
| break; |
| case ac_image_get_resinfo: |
| name = "llvm.amdgcn.image.getresinfo"; |
| break; |
| default: |
| unreachable("invalid image opcode"); |
| } |
| |
| ac_build_type_name_for_intr(LLVMTypeOf(args[0]), type, |
| sizeof(type)); |
| |
| snprintf(intr_name, sizeof(intr_name), "%s%s%s%s.v4f32.%s.v8i32", |
| name, |
| a->compare ? ".c" : "", |
| a->bias ? ".b" : |
| a->lod ? ".l" : |
| a->deriv ? ".d" : |
| a->level_zero ? ".lz" : "", |
| a->offset ? ".o" : "", |
| type); |
| |
| LLVMValueRef result = |
| ac_build_intrinsic(ctx, intr_name, |
| ctx->v4f32, args, num_args, |
| AC_FUNC_ATTR_READNONE); |
| if (!sample) { |
| result = LLVMBuildBitCast(ctx->builder, result, |
| ctx->v4i32, ""); |
| } |
| return result; |
| } |
| |
| args[num_args++] = a->addr; |
| args[num_args++] = a->resource; |
| |
| if (a->opcode == ac_image_load || |
| a->opcode == ac_image_load_mip || |
| a->opcode == ac_image_get_resinfo) { |
| dst_type = ctx->v4i32; |
| } else { |
| dst_type = ctx->v4f32; |
| args[num_args++] = a->sampler; |
| } |
| |
| args[num_args++] = LLVMConstInt(ctx->i32, a->dmask, 0); |
| args[num_args++] = LLVMConstInt(ctx->i32, a->unorm, 0); |
| args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* r128 */ |
| args[num_args++] = LLVMConstInt(ctx->i32, a->da, 0); |
| args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* glc */ |
| args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* slc */ |
| args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* tfe */ |
| args[num_args++] = LLVMConstInt(ctx->i32, 0, 0); /* lwe */ |
| |
| switch (a->opcode) { |
| case ac_image_sample: |
| name = "llvm.SI.image.sample"; |
| break; |
| case ac_image_gather4: |
| name = "llvm.SI.gather4"; |
| break; |
| case ac_image_load: |
| name = "llvm.SI.image.load"; |
| break; |
| case ac_image_load_mip: |
| name = "llvm.SI.image.load.mip"; |
| break; |
| case ac_image_get_lod: |
| name = "llvm.SI.getlod"; |
| break; |
| case ac_image_get_resinfo: |
| name = "llvm.SI.getresinfo"; |
| break; |
| } |
| |
| ac_build_type_name_for_intr(LLVMTypeOf(a->addr), type, sizeof(type)); |
| snprintf(intr_name, sizeof(intr_name), "%s%s%s%s.%s", |
| name, |
| a->compare ? ".c" : "", |
| a->bias ? ".b" : |
| a->lod ? ".l" : |
| a->deriv ? ".d" : |
| a->level_zero ? ".lz" : "", |
| a->offset ? ".o" : "", |
| type); |
| |
| return ac_build_intrinsic(ctx, intr_name, |
| dst_type, args, num_args, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_LEGACY); |
| } |
| |
| LLVMValueRef ac_build_cvt_pkrtz_f16(struct ac_llvm_context *ctx, |
| LLVMValueRef args[2]) |
| { |
| if (HAVE_LLVM >= 0x0500) { |
| LLVMTypeRef v2f16 = |
| LLVMVectorType(LLVMHalfTypeInContext(ctx->context), 2); |
| LLVMValueRef res = |
| ac_build_intrinsic(ctx, "llvm.amdgcn.cvt.pkrtz", |
| v2f16, args, 2, |
| AC_FUNC_ATTR_READNONE); |
| return LLVMBuildBitCast(ctx->builder, res, ctx->i32, ""); |
| } |
| |
| return ac_build_intrinsic(ctx, "llvm.SI.packf16", ctx->i32, args, 2, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_LEGACY); |
| } |
| |
| LLVMValueRef ac_build_wqm_vote(struct ac_llvm_context *ctx, LLVMValueRef i1) |
| { |
| assert(HAVE_LLVM >= 0x0600); |
| return ac_build_intrinsic(ctx, "llvm.amdgcn.wqm.vote", ctx->i1, |
| &i1, 1, AC_FUNC_ATTR_READNONE); |
| } |
| |
| void ac_build_kill_if_false(struct ac_llvm_context *ctx, LLVMValueRef i1) |
| { |
| if (HAVE_LLVM >= 0x0600) { |
| ac_build_intrinsic(ctx, "llvm.amdgcn.kill", ctx->voidt, |
| &i1, 1, 0); |
| return; |
| } |
| |
| LLVMValueRef value = LLVMBuildSelect(ctx->builder, i1, |
| LLVMConstReal(ctx->f32, 1), |
| LLVMConstReal(ctx->f32, -1), ""); |
| ac_build_intrinsic(ctx, "llvm.AMDGPU.kill", ctx->voidt, |
| &value, 1, AC_FUNC_ATTR_LEGACY); |
| } |
| |
| LLVMValueRef ac_build_bfe(struct ac_llvm_context *ctx, LLVMValueRef input, |
| LLVMValueRef offset, LLVMValueRef width, |
| bool is_signed) |
| { |
| LLVMValueRef args[] = { |
| input, |
| offset, |
| width, |
| }; |
| |
| if (HAVE_LLVM >= 0x0500) { |
| return ac_build_intrinsic(ctx, |
| is_signed ? "llvm.amdgcn.sbfe.i32" : |
| "llvm.amdgcn.ubfe.i32", |
| ctx->i32, args, 3, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| return ac_build_intrinsic(ctx, |
| is_signed ? "llvm.AMDGPU.bfe.i32" : |
| "llvm.AMDGPU.bfe.u32", |
| ctx->i32, args, 3, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_LEGACY); |
| } |
| |
| void ac_build_waitcnt(struct ac_llvm_context *ctx, unsigned simm16) |
| { |
| LLVMValueRef args[1] = { |
| LLVMConstInt(ctx->i32, simm16, false), |
| }; |
| ac_build_intrinsic(ctx, "llvm.amdgcn.s.waitcnt", |
| ctx->voidt, args, 1, 0); |
| } |
| |
| void ac_get_image_intr_name(const char *base_name, |
| LLVMTypeRef data_type, |
| LLVMTypeRef coords_type, |
| LLVMTypeRef rsrc_type, |
| char *out_name, unsigned out_len) |
| { |
| char coords_type_name[8]; |
| |
| ac_build_type_name_for_intr(coords_type, coords_type_name, |
| sizeof(coords_type_name)); |
| |
| if (HAVE_LLVM <= 0x0309) { |
| snprintf(out_name, out_len, "%s.%s", base_name, coords_type_name); |
| } else { |
| char data_type_name[8]; |
| char rsrc_type_name[8]; |
| |
| ac_build_type_name_for_intr(data_type, data_type_name, |
| sizeof(data_type_name)); |
| ac_build_type_name_for_intr(rsrc_type, rsrc_type_name, |
| sizeof(rsrc_type_name)); |
| snprintf(out_name, out_len, "%s.%s.%s.%s", base_name, |
| data_type_name, coords_type_name, rsrc_type_name); |
| } |
| } |
| |
| #define AC_EXP_TARGET (HAVE_LLVM >= 0x0500 ? 0 : 3) |
| #define AC_EXP_OUT0 (HAVE_LLVM >= 0x0500 ? 2 : 5) |
| |
| enum ac_ir_type { |
| AC_IR_UNDEF, |
| AC_IR_CONST, |
| AC_IR_VALUE, |
| }; |
| |
| struct ac_vs_exp_chan |
| { |
| LLVMValueRef value; |
| float const_float; |
| enum ac_ir_type type; |
| }; |
| |
| struct ac_vs_exp_inst { |
| unsigned offset; |
| LLVMValueRef inst; |
| struct ac_vs_exp_chan chan[4]; |
| }; |
| |
| struct ac_vs_exports { |
| unsigned num; |
| struct ac_vs_exp_inst exp[VARYING_SLOT_MAX]; |
| }; |
| |
| /* Return true if the PARAM export has been eliminated. */ |
| static bool ac_eliminate_const_output(uint8_t *vs_output_param_offset, |
| uint32_t num_outputs, |
| struct ac_vs_exp_inst *exp) |
| { |
| unsigned i, default_val; /* SPI_PS_INPUT_CNTL_i.DEFAULT_VAL */ |
| bool is_zero[4] = {}, is_one[4] = {}; |
| |
| for (i = 0; i < 4; i++) { |
| /* It's a constant expression. Undef outputs are eliminated too. */ |
| if (exp->chan[i].type == AC_IR_UNDEF) { |
| is_zero[i] = true; |
| is_one[i] = true; |
| } else if (exp->chan[i].type == AC_IR_CONST) { |
| if (exp->chan[i].const_float == 0) |
| is_zero[i] = true; |
| else if (exp->chan[i].const_float == 1) |
| is_one[i] = true; |
| else |
| return false; /* other constant */ |
| } else |
| return false; |
| } |
| |
| /* Only certain combinations of 0 and 1 can be eliminated. */ |
| if (is_zero[0] && is_zero[1] && is_zero[2]) |
| default_val = is_zero[3] ? 0 : 1; |
| else if (is_one[0] && is_one[1] && is_one[2]) |
| default_val = is_zero[3] ? 2 : 3; |
| else |
| return false; |
| |
| /* The PARAM export can be represented as DEFAULT_VAL. Kill it. */ |
| LLVMInstructionEraseFromParent(exp->inst); |
| |
| /* Change OFFSET to DEFAULT_VAL. */ |
| for (i = 0; i < num_outputs; i++) { |
| if (vs_output_param_offset[i] == exp->offset) { |
| vs_output_param_offset[i] = |
| AC_EXP_PARAM_DEFAULT_VAL_0000 + default_val; |
| break; |
| } |
| } |
| return true; |
| } |
| |
| static bool ac_eliminate_duplicated_output(uint8_t *vs_output_param_offset, |
| uint32_t num_outputs, |
| struct ac_vs_exports *processed, |
| struct ac_vs_exp_inst *exp) |
| { |
| unsigned p, copy_back_channels = 0; |
| |
| /* See if the output is already in the list of processed outputs. |
| * The LLVMValueRef comparison relies on SSA. |
| */ |
| for (p = 0; p < processed->num; p++) { |
| bool different = false; |
| |
| for (unsigned j = 0; j < 4; j++) { |
| struct ac_vs_exp_chan *c1 = &processed->exp[p].chan[j]; |
| struct ac_vs_exp_chan *c2 = &exp->chan[j]; |
| |
| /* Treat undef as a match. */ |
| if (c2->type == AC_IR_UNDEF) |
| continue; |
| |
| /* If c1 is undef but c2 isn't, we can copy c2 to c1 |
| * and consider the instruction duplicated. |
| */ |
| if (c1->type == AC_IR_UNDEF) { |
| copy_back_channels |= 1 << j; |
| continue; |
| } |
| |
| /* Test whether the channels are not equal. */ |
| if (c1->type != c2->type || |
| (c1->type == AC_IR_CONST && |
| c1->const_float != c2->const_float) || |
| (c1->type == AC_IR_VALUE && |
| c1->value != c2->value)) { |
| different = true; |
| break; |
| } |
| } |
| if (!different) |
| break; |
| |
| copy_back_channels = 0; |
| } |
| if (p == processed->num) |
| return false; |
| |
| /* If a match was found, but the matching export has undef where the new |
| * one has a normal value, copy the normal value to the undef channel. |
| */ |
| struct ac_vs_exp_inst *match = &processed->exp[p]; |
| |
| while (copy_back_channels) { |
| unsigned chan = u_bit_scan(©_back_channels); |
| |
| assert(match->chan[chan].type == AC_IR_UNDEF); |
| LLVMSetOperand(match->inst, AC_EXP_OUT0 + chan, |
| exp->chan[chan].value); |
| match->chan[chan] = exp->chan[chan]; |
| } |
| |
| /* The PARAM export is duplicated. Kill it. */ |
| LLVMInstructionEraseFromParent(exp->inst); |
| |
| /* Change OFFSET to the matching export. */ |
| for (unsigned i = 0; i < num_outputs; i++) { |
| if (vs_output_param_offset[i] == exp->offset) { |
| vs_output_param_offset[i] = match->offset; |
| break; |
| } |
| } |
| return true; |
| } |
| |
| void ac_optimize_vs_outputs(struct ac_llvm_context *ctx, |
| LLVMValueRef main_fn, |
| uint8_t *vs_output_param_offset, |
| uint32_t num_outputs, |
| uint8_t *num_param_exports) |
| { |
| LLVMBasicBlockRef bb; |
| bool removed_any = false; |
| struct ac_vs_exports exports; |
| |
| exports.num = 0; |
| |
| /* Process all LLVM instructions. */ |
| bb = LLVMGetFirstBasicBlock(main_fn); |
| while (bb) { |
| LLVMValueRef inst = LLVMGetFirstInstruction(bb); |
| |
| while (inst) { |
| LLVMValueRef cur = inst; |
| inst = LLVMGetNextInstruction(inst); |
| struct ac_vs_exp_inst exp; |
| |
| if (LLVMGetInstructionOpcode(cur) != LLVMCall) |
| continue; |
| |
| LLVMValueRef callee = ac_llvm_get_called_value(cur); |
| |
| if (!ac_llvm_is_function(callee)) |
| continue; |
| |
| const char *name = LLVMGetValueName(callee); |
| unsigned num_args = LLVMCountParams(callee); |
| |
| /* Check if this is an export instruction. */ |
| if ((num_args != 9 && num_args != 8) || |
| (strcmp(name, "llvm.SI.export") && |
| strcmp(name, "llvm.amdgcn.exp.f32"))) |
| continue; |
| |
| LLVMValueRef arg = LLVMGetOperand(cur, AC_EXP_TARGET); |
| unsigned target = LLVMConstIntGetZExtValue(arg); |
| |
| if (target < V_008DFC_SQ_EXP_PARAM) |
| continue; |
| |
| target -= V_008DFC_SQ_EXP_PARAM; |
| |
| /* Parse the instruction. */ |
| memset(&exp, 0, sizeof(exp)); |
| exp.offset = target; |
| exp.inst = cur; |
| |
| for (unsigned i = 0; i < 4; i++) { |
| LLVMValueRef v = LLVMGetOperand(cur, AC_EXP_OUT0 + i); |
| |
| exp.chan[i].value = v; |
| |
| if (LLVMIsUndef(v)) { |
| exp.chan[i].type = AC_IR_UNDEF; |
| } else if (LLVMIsAConstantFP(v)) { |
| LLVMBool loses_info; |
| exp.chan[i].type = AC_IR_CONST; |
| exp.chan[i].const_float = |
| LLVMConstRealGetDouble(v, &loses_info); |
| } else { |
| exp.chan[i].type = AC_IR_VALUE; |
| } |
| } |
| |
| /* Eliminate constant and duplicated PARAM exports. */ |
| if (ac_eliminate_const_output(vs_output_param_offset, |
| num_outputs, &exp) || |
| ac_eliminate_duplicated_output(vs_output_param_offset, |
| num_outputs, &exports, |
| &exp)) { |
| removed_any = true; |
| } else { |
| exports.exp[exports.num++] = exp; |
| } |
| } |
| bb = LLVMGetNextBasicBlock(bb); |
| } |
| |
| /* Remove holes in export memory due to removed PARAM exports. |
| * This is done by renumbering all PARAM exports. |
| */ |
| if (removed_any) { |
| uint8_t old_offset[VARYING_SLOT_MAX]; |
| unsigned out, i; |
| |
| /* Make a copy of the offsets. We need the old version while |
| * we are modifying some of them. */ |
| memcpy(old_offset, vs_output_param_offset, |
| sizeof(old_offset)); |
| |
| for (i = 0; i < exports.num; i++) { |
| unsigned offset = exports.exp[i].offset; |
| |
| /* Update vs_output_param_offset. Multiple outputs can |
| * have the same offset. |
| */ |
| for (out = 0; out < num_outputs; out++) { |
| if (old_offset[out] == offset) |
| vs_output_param_offset[out] = i; |
| } |
| |
| /* Change the PARAM offset in the instruction. */ |
| LLVMSetOperand(exports.exp[i].inst, AC_EXP_TARGET, |
| LLVMConstInt(ctx->i32, |
| V_008DFC_SQ_EXP_PARAM + i, 0)); |
| } |
| *num_param_exports = exports.num; |
| } |
| } |
| |
| void ac_init_exec_full_mask(struct ac_llvm_context *ctx) |
| { |
| LLVMValueRef full_mask = LLVMConstInt(ctx->i64, ~0ull, 0); |
| ac_build_intrinsic(ctx, |
| "llvm.amdgcn.init.exec", ctx->voidt, |
| &full_mask, 1, AC_FUNC_ATTR_CONVERGENT); |
| } |
| |
| void ac_declare_lds_as_pointer(struct ac_llvm_context *ctx) |
| { |
| unsigned lds_size = ctx->chip_class >= CIK ? 65536 : 32768; |
| ctx->lds = LLVMBuildIntToPtr(ctx->builder, ctx->i32_0, |
| LLVMPointerType(LLVMArrayType(ctx->i32, lds_size / 4), AC_LOCAL_ADDR_SPACE), |
| "lds"); |
| } |
| |
| LLVMValueRef ac_lds_load(struct ac_llvm_context *ctx, |
| LLVMValueRef dw_addr) |
| { |
| return ac_build_load(ctx, ctx->lds, dw_addr); |
| } |
| |
| void ac_lds_store(struct ac_llvm_context *ctx, |
| LLVMValueRef dw_addr, |
| LLVMValueRef value) |
| { |
| value = ac_to_integer(ctx, value); |
| ac_build_indexed_store(ctx, ctx->lds, |
| dw_addr, value); |
| } |
| |
| LLVMValueRef ac_find_lsb(struct ac_llvm_context *ctx, |
| LLVMTypeRef dst_type, |
| LLVMValueRef src0) |
| { |
| LLVMValueRef params[2] = { |
| src0, |
| |
| /* The value of 1 means that ffs(x=0) = undef, so LLVM won't |
| * add special code to check for x=0. The reason is that |
| * the LLVM behavior for x=0 is different from what we |
| * need here. However, LLVM also assumes that ffs(x) is |
| * in [0, 31], but GLSL expects that ffs(0) = -1, so |
| * a conditional assignment to handle 0 is still required. |
| * |
| * The hardware already implements the correct behavior. |
| */ |
| LLVMConstInt(ctx->i1, 1, false), |
| }; |
| |
| LLVMValueRef lsb = ac_build_intrinsic(ctx, "llvm.cttz.i32", ctx->i32, |
| params, 2, |
| AC_FUNC_ATTR_READNONE); |
| |
| /* TODO: We need an intrinsic to skip this conditional. */ |
| /* Check for zero: */ |
| return LLVMBuildSelect(ctx->builder, LLVMBuildICmp(ctx->builder, |
| LLVMIntEQ, src0, |
| ctx->i32_0, ""), |
| LLVMConstInt(ctx->i32, -1, 0), lsb, ""); |
| } |
| |
| static struct ac_llvm_flow * |
| get_current_flow(struct ac_llvm_context *ctx) |
| { |
| if (ctx->flow_depth > 0) |
| return &ctx->flow[ctx->flow_depth - 1]; |
| return NULL; |
| } |
| |
| static struct ac_llvm_flow * |
| get_innermost_loop(struct ac_llvm_context *ctx) |
| { |
| for (unsigned i = ctx->flow_depth; i > 0; --i) { |
| if (ctx->flow[i - 1].loop_entry_block) |
| return &ctx->flow[i - 1]; |
| } |
| return NULL; |
| } |
| |
| static struct ac_llvm_flow * |
| push_flow(struct ac_llvm_context *ctx) |
| { |
| struct ac_llvm_flow *flow; |
| |
| if (ctx->flow_depth >= ctx->flow_depth_max) { |
| unsigned new_max = MAX2(ctx->flow_depth << 1, |
| AC_LLVM_INITIAL_CF_DEPTH); |
| |
| ctx->flow = realloc(ctx->flow, new_max * sizeof(*ctx->flow)); |
| ctx->flow_depth_max = new_max; |
| } |
| |
| flow = &ctx->flow[ctx->flow_depth]; |
| ctx->flow_depth++; |
| |
| flow->next_block = NULL; |
| flow->loop_entry_block = NULL; |
| return flow; |
| } |
| |
| static void set_basicblock_name(LLVMBasicBlockRef bb, const char *base, |
| int label_id) |
| { |
| char buf[32]; |
| snprintf(buf, sizeof(buf), "%s%d", base, label_id); |
| LLVMSetValueName(LLVMBasicBlockAsValue(bb), buf); |
| } |
| |
| /* Append a basic block at the level of the parent flow. |
| */ |
| static LLVMBasicBlockRef append_basic_block(struct ac_llvm_context *ctx, |
| const char *name) |
| { |
| assert(ctx->flow_depth >= 1); |
| |
| if (ctx->flow_depth >= 2) { |
| struct ac_llvm_flow *flow = &ctx->flow[ctx->flow_depth - 2]; |
| |
| return LLVMInsertBasicBlockInContext(ctx->context, |
| flow->next_block, name); |
| } |
| |
| LLVMValueRef main_fn = |
| LLVMGetBasicBlockParent(LLVMGetInsertBlock(ctx->builder)); |
| return LLVMAppendBasicBlockInContext(ctx->context, main_fn, name); |
| } |
| |
| /* Emit a branch to the given default target for the current block if |
| * applicable -- that is, if the current block does not already contain a |
| * branch from a break or continue. |
| */ |
| static void emit_default_branch(LLVMBuilderRef builder, |
| LLVMBasicBlockRef target) |
| { |
| if (!LLVMGetBasicBlockTerminator(LLVMGetInsertBlock(builder))) |
| LLVMBuildBr(builder, target); |
| } |
| |
| void ac_build_bgnloop(struct ac_llvm_context *ctx, int label_id) |
| { |
| struct ac_llvm_flow *flow = push_flow(ctx); |
| flow->loop_entry_block = append_basic_block(ctx, "LOOP"); |
| flow->next_block = append_basic_block(ctx, "ENDLOOP"); |
| set_basicblock_name(flow->loop_entry_block, "loop", label_id); |
| LLVMBuildBr(ctx->builder, flow->loop_entry_block); |
| LLVMPositionBuilderAtEnd(ctx->builder, flow->loop_entry_block); |
| } |
| |
| void ac_build_break(struct ac_llvm_context *ctx) |
| { |
| struct ac_llvm_flow *flow = get_innermost_loop(ctx); |
| LLVMBuildBr(ctx->builder, flow->next_block); |
| } |
| |
| void ac_build_continue(struct ac_llvm_context *ctx) |
| { |
| struct ac_llvm_flow *flow = get_innermost_loop(ctx); |
| LLVMBuildBr(ctx->builder, flow->loop_entry_block); |
| } |
| |
| void ac_build_else(struct ac_llvm_context *ctx, int label_id) |
| { |
| struct ac_llvm_flow *current_branch = get_current_flow(ctx); |
| LLVMBasicBlockRef endif_block; |
| |
| assert(!current_branch->loop_entry_block); |
| |
| endif_block = append_basic_block(ctx, "ENDIF"); |
| emit_default_branch(ctx->builder, endif_block); |
| |
| LLVMPositionBuilderAtEnd(ctx->builder, current_branch->next_block); |
| set_basicblock_name(current_branch->next_block, "else", label_id); |
| |
| current_branch->next_block = endif_block; |
| } |
| |
| void ac_build_endif(struct ac_llvm_context *ctx, int label_id) |
| { |
| struct ac_llvm_flow *current_branch = get_current_flow(ctx); |
| |
| assert(!current_branch->loop_entry_block); |
| |
| emit_default_branch(ctx->builder, current_branch->next_block); |
| LLVMPositionBuilderAtEnd(ctx->builder, current_branch->next_block); |
| set_basicblock_name(current_branch->next_block, "endif", label_id); |
| |
| ctx->flow_depth--; |
| } |
| |
| void ac_build_endloop(struct ac_llvm_context *ctx, int label_id) |
| { |
| struct ac_llvm_flow *current_loop = get_current_flow(ctx); |
| |
| assert(current_loop->loop_entry_block); |
| |
| emit_default_branch(ctx->builder, current_loop->loop_entry_block); |
| |
| LLVMPositionBuilderAtEnd(ctx->builder, current_loop->next_block); |
| set_basicblock_name(current_loop->next_block, "endloop", label_id); |
| ctx->flow_depth--; |
| } |
| |
| static void if_cond_emit(struct ac_llvm_context *ctx, LLVMValueRef cond, |
| int label_id) |
| { |
| struct ac_llvm_flow *flow = push_flow(ctx); |
| LLVMBasicBlockRef if_block; |
| |
| if_block = append_basic_block(ctx, "IF"); |
| flow->next_block = append_basic_block(ctx, "ELSE"); |
| set_basicblock_name(if_block, "if", label_id); |
| LLVMBuildCondBr(ctx->builder, cond, if_block, flow->next_block); |
| LLVMPositionBuilderAtEnd(ctx->builder, if_block); |
| } |
| |
| void ac_build_if(struct ac_llvm_context *ctx, LLVMValueRef value, |
| int label_id) |
| { |
| LLVMValueRef cond = LLVMBuildFCmp(ctx->builder, LLVMRealUNE, |
| value, ctx->f32_0, ""); |
| if_cond_emit(ctx, cond, label_id); |
| } |
| |
| void ac_build_uif(struct ac_llvm_context *ctx, LLVMValueRef value, |
| int label_id) |
| { |
| LLVMValueRef cond = LLVMBuildICmp(ctx->builder, LLVMIntNE, |
| ac_to_integer(ctx, value), |
| ctx->i32_0, ""); |
| if_cond_emit(ctx, cond, label_id); |
| } |