| /* |
| * 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 <llvm/Config/llvm-config.h> |
| |
| #include "c11/threads.h" |
| |
| #include <assert.h> |
| #include <stdio.h> |
| |
| #include "ac_llvm_util.h" |
| #include "ac_shader_util.h" |
| #include "ac_exp_param.h" |
| #include "util/bitscan.h" |
| #include "util/macros.h" |
| #include "util/u_atomic.h" |
| #include "util/u_math.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, |
| struct ac_llvm_compiler *compiler, |
| enum chip_class chip_class, enum radeon_family family, |
| enum ac_float_mode float_mode, unsigned wave_size, |
| unsigned ballot_mask_bits) |
| { |
| ctx->context = LLVMContextCreate(); |
| |
| ctx->chip_class = chip_class; |
| ctx->family = family; |
| ctx->wave_size = wave_size; |
| ctx->ballot_mask_bits = ballot_mask_bits; |
| ctx->float_mode = float_mode; |
| ctx->module = ac_create_module(wave_size == 32 ? compiler->tm_wave32 |
| : compiler->tm, |
| ctx->context); |
| ctx->builder = ac_create_builder(ctx->context, float_mode); |
| |
| 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->i128 = LLVMIntTypeInContext(ctx->context, 128); |
| ctx->intptr = ctx->i32; |
| ctx->f16 = LLVMHalfTypeInContext(ctx->context); |
| ctx->f32 = LLVMFloatTypeInContext(ctx->context); |
| ctx->f64 = LLVMDoubleTypeInContext(ctx->context); |
| ctx->v2i16 = LLVMVectorType(ctx->i16, 2); |
| ctx->v4i16 = LLVMVectorType(ctx->i16, 4); |
| ctx->v2f16 = LLVMVectorType(ctx->f16, 2); |
| ctx->v4f16 = LLVMVectorType(ctx->f16, 4); |
| 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->v3f32 = LLVMVectorType(ctx->f32, 3); |
| ctx->v4f32 = LLVMVectorType(ctx->f32, 4); |
| ctx->v8i32 = LLVMVectorType(ctx->i32, 8); |
| ctx->iN_wavemask = LLVMIntTypeInContext(ctx->context, ctx->wave_size); |
| ctx->iN_ballotmask = LLVMIntTypeInContext(ctx->context, ballot_mask_bits); |
| |
| ctx->i8_0 = LLVMConstInt(ctx->i8, 0, false); |
| ctx->i8_1 = LLVMConstInt(ctx->i8, 1, false); |
| ctx->i16_0 = LLVMConstInt(ctx->i16, 0, false); |
| ctx->i16_1 = LLVMConstInt(ctx->i16, 1, false); |
| 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->i128_0 = LLVMConstInt(ctx->i128, 0, false); |
| ctx->i128_1 = LLVMConstInt(ctx->i128, 1, false); |
| ctx->f16_0 = LLVMConstReal(ctx->f16, 0.0); |
| ctx->f16_1 = LLVMConstReal(ctx->f16, 1.0); |
| 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->uniform_md_kind = LLVMGetMDKindIDInContext(ctx->context, |
| "amdgpu.uniform", 14); |
| |
| ctx->empty_md = LLVMMDNodeInContext(ctx->context, NULL, 0); |
| ctx->flow = calloc(1, sizeof(*ctx->flow)); |
| } |
| |
| void |
| ac_llvm_context_dispose(struct ac_llvm_context *ctx) |
| { |
| free(ctx->flow->stack); |
| free(ctx->flow); |
| ctx->flow = NULL; |
| } |
| |
| 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), ""); |
| } |
| |
| int |
| ac_get_elem_bits(struct ac_llvm_context *ctx, LLVMTypeRef type) |
| { |
| if (LLVMGetTypeKind(type) == LLVMVectorTypeKind) |
| type = LLVMGetElementType(type); |
| |
| if (LLVMGetTypeKind(type) == LLVMIntegerTypeKind) |
| return LLVMGetIntTypeWidth(type); |
| |
| if (LLVMGetTypeKind(type) == LLVMPointerTypeKind) { |
| if (LLVMGetPointerAddressSpace(type) == AC_ADDR_SPACE_LDS) |
| return 32; |
| } |
| |
| if (type == ctx->f16) |
| return 16; |
| if (type == ctx->f32) |
| return 32; |
| if (type == ctx->f64) |
| return 64; |
| |
| unreachable("Unhandled type kind in get_elem_bits"); |
| } |
| |
| unsigned |
| ac_get_type_size(LLVMTypeRef type) |
| { |
| LLVMTypeKind kind = LLVMGetTypeKind(type); |
| |
| switch (kind) { |
| case LLVMIntegerTypeKind: |
| return LLVMGetIntTypeWidth(type) / 8; |
| case LLVMHalfTypeKind: |
| return 2; |
| case LLVMFloatTypeKind: |
| return 4; |
| case LLVMDoubleTypeKind: |
| return 8; |
| case LLVMPointerTypeKind: |
| if (LLVMGetPointerAddressSpace(type) == AC_ADDR_SPACE_CONST_32BIT) |
| return 4; |
| 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->i8) |
| return ctx->i8; |
| else 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)); |
| } |
| if (LLVMGetTypeKind(t) == LLVMPointerTypeKind) { |
| switch (LLVMGetPointerAddressSpace(t)) { |
| case AC_ADDR_SPACE_GLOBAL: |
| return ctx->i64; |
| case AC_ADDR_SPACE_CONST_32BIT: |
| case AC_ADDR_SPACE_LDS: |
| return ctx->i32; |
| default: |
| unreachable("unhandled address space"); |
| } |
| } |
| return to_integer_type_scalar(ctx, t); |
| } |
| |
| LLVMValueRef |
| ac_to_integer(struct ac_llvm_context *ctx, LLVMValueRef v) |
| { |
| LLVMTypeRef type = LLVMTypeOf(v); |
| if (LLVMGetTypeKind(type) == LLVMPointerTypeKind) { |
| return LLVMBuildPtrToInt(ctx->builder, v, ac_to_integer_type(ctx, type), ""); |
| } |
| return LLVMBuildBitCast(ctx->builder, v, ac_to_integer_type(ctx, type), ""); |
| } |
| |
| LLVMValueRef |
| ac_to_integer_or_pointer(struct ac_llvm_context *ctx, LLVMValueRef v) |
| { |
| LLVMTypeRef type = LLVMTypeOf(v); |
| if (LLVMGetTypeKind(type) == LLVMPointerTypeKind) |
| return v; |
| return ac_to_integer(ctx, v); |
| } |
| |
| static LLVMTypeRef to_float_type_scalar(struct ac_llvm_context *ctx, LLVMTypeRef t) |
| { |
| if (t == ctx->i8) |
| return ctx->i8; |
| else 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 = !(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); |
| LLVMDisposeMessage(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 LLVMHalfTypeKind: |
| snprintf(buf, bufsize, "f16"); |
| 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; |
| } |
| |
| void ac_build_s_barrier(struct ac_llvm_context *ctx) |
| { |
| ac_build_intrinsic(ctx, "llvm.amdgcn.s.barrier", ctx->voidt, NULL, |
| 0, AC_FUNC_ATTR_CONVERGENT); |
| } |
| |
| /* 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); |
| LLVMTypeRef type = LLVMTypeOf(*pvgpr); |
| unsigned bitsize = ac_get_elem_bits(ctx, type); |
| LLVMValueRef vgpr = *pvgpr; |
| LLVMTypeRef vgpr_type; |
| unsigned vgpr_size; |
| LLVMValueRef vgpr0; |
| |
| if (bitsize < 32) |
| vgpr = LLVMBuildZExt(ctx->builder, vgpr, ctx->i32, ""); |
| |
| vgpr_type = LLVMTypeOf(vgpr); |
| vgpr_size = ac_get_type_size(vgpr_type); |
| |
| 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, ""); |
| |
| if (bitsize < 32) |
| vgpr = LLVMBuildTrunc(builder, vgpr, type, ""); |
| |
| *pvgpr = vgpr; |
| } |
| } |
| |
| LLVMValueRef |
| ac_build_shader_clock(struct ac_llvm_context *ctx, nir_scope scope) |
| { |
| const char *name = scope == NIR_SCOPE_DEVICE ? "llvm.amdgcn.s.memrealtime" : "llvm.amdgcn.s.memtime"; |
| LLVMValueRef tmp = ac_build_intrinsic(ctx, name, ctx->i64, NULL, 0, 0); |
| return LLVMBuildBitCast(ctx->builder, tmp, ctx->v2i32, ""); |
| } |
| |
| LLVMValueRef |
| ac_build_ballot(struct ac_llvm_context *ctx, |
| LLVMValueRef value) |
| { |
| const char *name; |
| |
| if (LLVM_VERSION_MAJOR >= 9) { |
| if (ctx->wave_size == 64) |
| name = "llvm.amdgcn.icmp.i64.i32"; |
| else |
| name = "llvm.amdgcn.icmp.i32.i32"; |
| } else { |
| name = "llvm.amdgcn.icmp.i32"; |
| } |
| 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]); |
| |
| args[0] = ac_to_integer(ctx, args[0]); |
| |
| return ac_build_intrinsic(ctx, name, ctx->iN_wavemask, args, 3, |
| AC_FUNC_ATTR_NOUNWIND | |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_CONVERGENT); |
| } |
| |
| LLVMValueRef ac_get_i1_sgpr_mask(struct ac_llvm_context *ctx, |
| LLVMValueRef value) |
| { |
| const char *name; |
| |
| if (LLVM_VERSION_MAJOR >= 9) { |
| if (ctx->wave_size == 64) |
| name = "llvm.amdgcn.icmp.i64.i1"; |
| else |
| name = "llvm.amdgcn.icmp.i32.i1"; |
| } else { |
| name = "llvm.amdgcn.icmp.i1"; |
| } |
| LLVMValueRef args[3] = { |
| value, |
| ctx->i1false, |
| LLVMConstInt(ctx->i32, LLVMIntNE, 0), |
| }; |
| |
| return ac_build_intrinsic(ctx, name, ctx->iN_wavemask, 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->iN_wavemask, 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->iN_wavemask, 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); |
| } |
| |
| /* Expand a scalar or vector to <dst_channels x type> by filling the remaining |
| * channels with undef. Extract at most src_channels components from the input. |
| */ |
| static LLVMValueRef |
| ac_build_expand(struct ac_llvm_context *ctx, |
| LLVMValueRef value, |
| unsigned src_channels, |
| unsigned dst_channels) |
| { |
| LLVMTypeRef elemtype; |
| LLVMValueRef chan[dst_channels]; |
| |
| if (LLVMGetTypeKind(LLVMTypeOf(value)) == LLVMVectorTypeKind) { |
| unsigned vec_size = LLVMGetVectorSize(LLVMTypeOf(value)); |
| |
| if (src_channels == dst_channels && vec_size == dst_channels) |
| return value; |
| |
| src_channels = MIN2(src_channels, vec_size); |
| |
| for (unsigned i = 0; i < src_channels; i++) |
| chan[i] = ac_llvm_extract_elem(ctx, value, i); |
| |
| elemtype = LLVMGetElementType(LLVMTypeOf(value)); |
| } else { |
| if (src_channels) { |
| assert(src_channels == 1); |
| chan[0] = value; |
| } |
| elemtype = LLVMTypeOf(value); |
| } |
| |
| for (unsigned i = src_channels; i < dst_channels; i++) |
| chan[i] = LLVMGetUndef(elemtype); |
| |
| return ac_build_gather_values(ctx, chan, dst_channels); |
| } |
| |
| /* Extract components [start, start + channels) from a vector. |
| */ |
| LLVMValueRef |
| ac_extract_components(struct ac_llvm_context *ctx, |
| LLVMValueRef value, |
| unsigned start, |
| unsigned channels) |
| { |
| LLVMValueRef chan[channels]; |
| |
| for (unsigned i = 0; i < channels; i++) |
| chan[i] = ac_llvm_extract_elem(ctx, value, i + start); |
| |
| return ac_build_gather_values(ctx, chan, channels); |
| } |
| |
| /* Expand a scalar or vector to <4 x type> by filling the remaining channels |
| * with undef. Extract at most num_channels components from the input. |
| */ |
| LLVMValueRef ac_build_expand_to_vec4(struct ac_llvm_context *ctx, |
| LLVMValueRef value, |
| unsigned num_channels) |
| { |
| return ac_build_expand(ctx, value, num_channels, 4); |
| } |
| |
| LLVMValueRef ac_build_round(struct ac_llvm_context *ctx, LLVMValueRef value) |
| { |
| unsigned type_size = ac_get_type_size(LLVMTypeOf(value)); |
| const char *name; |
| |
| if (type_size == 2) |
| name = "llvm.rint.f16"; |
| else if (type_size == 4) |
| name = "llvm.rint.f32"; |
| else |
| name = "llvm.rint.f64"; |
| |
| return ac_build_intrinsic(ctx, name, LLVMTypeOf(value), &value, 1, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| LLVMValueRef |
| ac_build_fdiv(struct ac_llvm_context *ctx, |
| LLVMValueRef num, |
| LLVMValueRef den) |
| { |
| unsigned type_size = ac_get_type_size(LLVMTypeOf(den)); |
| const char *name; |
| |
| /* For doubles, we need precise division to pass GLCTS. */ |
| if (ctx->float_mode == AC_FLOAT_MODE_DEFAULT_OPENGL && |
| type_size == 8) |
| return LLVMBuildFDiv(ctx->builder, num, den, ""); |
| |
| if (type_size == 2) |
| name = "llvm.amdgcn.rcp.f16"; |
| else if (type_size == 4) |
| name = "llvm.amdgcn.rcp.f32"; |
| else |
| name = "llvm.amdgcn.rcp.f64"; |
| |
| LLVMValueRef rcp = ac_build_intrinsic(ctx, name, LLVMTypeOf(den), |
| &den, 1, AC_FUNC_ATTR_READNONE); |
| |
| return LLVMBuildFMul(ctx->builder, num, rcp, ""); |
| } |
| |
| /* See fast_idiv_by_const.h. */ |
| /* Set: increment = util_fast_udiv_info::increment ? multiplier : 0; */ |
| LLVMValueRef ac_build_fast_udiv(struct ac_llvm_context *ctx, |
| LLVMValueRef num, |
| LLVMValueRef multiplier, |
| LLVMValueRef pre_shift, |
| LLVMValueRef post_shift, |
| LLVMValueRef increment) |
| { |
| LLVMBuilderRef builder = ctx->builder; |
| |
| num = LLVMBuildLShr(builder, num, pre_shift, ""); |
| num = LLVMBuildMul(builder, |
| LLVMBuildZExt(builder, num, ctx->i64, ""), |
| LLVMBuildZExt(builder, multiplier, ctx->i64, ""), ""); |
| num = LLVMBuildAdd(builder, num, |
| LLVMBuildZExt(builder, increment, ctx->i64, ""), ""); |
| num = LLVMBuildLShr(builder, num, LLVMConstInt(ctx->i64, 32, 0), ""); |
| num = LLVMBuildTrunc(builder, num, ctx->i32, ""); |
| return LLVMBuildLShr(builder, num, post_shift, ""); |
| } |
| |
| /* See fast_idiv_by_const.h. */ |
| /* If num != UINT_MAX, this more efficient version can be used. */ |
| /* Set: increment = util_fast_udiv_info::increment; */ |
| LLVMValueRef ac_build_fast_udiv_nuw(struct ac_llvm_context *ctx, |
| LLVMValueRef num, |
| LLVMValueRef multiplier, |
| LLVMValueRef pre_shift, |
| LLVMValueRef post_shift, |
| LLVMValueRef increment) |
| { |
| LLVMBuilderRef builder = ctx->builder; |
| |
| num = LLVMBuildLShr(builder, num, pre_shift, ""); |
| num = LLVMBuildNUWAdd(builder, num, increment, ""); |
| num = LLVMBuildMul(builder, |
| LLVMBuildZExt(builder, num, ctx->i64, ""), |
| LLVMBuildZExt(builder, multiplier, ctx->i64, ""), ""); |
| num = LLVMBuildLShr(builder, num, LLVMConstInt(ctx->i64, 32, 0), ""); |
| num = LLVMBuildTrunc(builder, num, ctx->i32, ""); |
| return LLVMBuildLShr(builder, num, post_shift, ""); |
| } |
| |
| /* See fast_idiv_by_const.h. */ |
| /* Both operands must fit in 31 bits and the divisor must not be 1. */ |
| LLVMValueRef ac_build_fast_udiv_u31_d_not_one(struct ac_llvm_context *ctx, |
| LLVMValueRef num, |
| LLVMValueRef multiplier, |
| LLVMValueRef post_shift) |
| { |
| LLVMBuilderRef builder = ctx->builder; |
| |
| num = LLVMBuildMul(builder, |
| LLVMBuildZExt(builder, num, ctx->i64, ""), |
| LLVMBuildZExt(builder, multiplier, ctx->i64, ""), ""); |
| num = LLVMBuildLShr(builder, num, LLVMConstInt(ctx->i64, 32, 0), ""); |
| num = LLVMBuildTrunc(builder, num, ctx->i32, ""); |
| return LLVMBuildLShr(builder, num, post_shift, ""); |
| } |
| |
| /* 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 = ac_build_round(ctx, coords_arg[3]); |
| |
| /* 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." |
| * |
| * GFX8 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 <= GFX8) { |
| 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 */ |
| coords[2] = ac_build_fmad(ctx, coords_arg[3], LLVMConstReal(ctx->f32, 8.0), 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; |
| |
| 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_f16(struct ac_llvm_context *ctx, |
| LLVMValueRef llvm_chan, |
| LLVMValueRef attr_number, |
| LLVMValueRef params, |
| LLVMValueRef i, |
| LLVMValueRef j) |
| { |
| LLVMValueRef args[6]; |
| LLVMValueRef p1; |
| |
| args[0] = i; |
| args[1] = llvm_chan; |
| args[2] = attr_number; |
| args[3] = ctx->i1false; |
| args[4] = params; |
| |
| p1 = ac_build_intrinsic(ctx, "llvm.amdgcn.interp.p1.f16", |
| ctx->f32, args, 5, AC_FUNC_ATTR_READNONE); |
| |
| args[0] = p1; |
| args[1] = j; |
| args[2] = llvm_chan; |
| args[3] = attr_number; |
| args[4] = ctx->i1false; |
| args[5] = params; |
| |
| return ac_build_intrinsic(ctx, "llvm.amdgcn.interp.p2.f16", |
| ctx->f16, args, 6, 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]; |
| |
| 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_gep_ptr(struct ac_llvm_context *ctx, |
| LLVMValueRef base_ptr, |
| LLVMValueRef index) |
| { |
| return LLVMBuildGEP(ctx->builder, base_ptr, &index, 1, ""); |
| } |
| |
| LLVMValueRef |
| ac_build_gep0(struct ac_llvm_context *ctx, |
| LLVMValueRef base_ptr, |
| LLVMValueRef index) |
| { |
| LLVMValueRef indices[2] = { |
| ctx->i32_0, |
| index, |
| }; |
| return LLVMBuildGEP(ctx->builder, base_ptr, indices, 2, ""); |
| } |
| |
| LLVMValueRef ac_build_pointer_add(struct ac_llvm_context *ctx, LLVMValueRef ptr, |
| LLVMValueRef index) |
| { |
| return LLVMBuildPointerCast(ctx->builder, |
| LLVMBuildGEP(ctx->builder, ptr, &index, 1, ""), |
| LLVMTypeOf(ptr), ""); |
| } |
| |
| 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) |
| * \param no_unsigned_wraparound |
| * For all possible re-associations and re-distributions of an expression |
| * "base_ptr + index * elemsize" into "addr + offset" (excluding GEPs |
| * without inbounds in base_ptr), this parameter is true if "addr + offset" |
| * does not result in an unsigned integer wraparound. This is used for |
| * optimal code generation of 32-bit pointer arithmetic. |
| * |
| * For example, a 32-bit immediate offset that causes a 32-bit unsigned |
| * integer wraparound can't be an imm offset in s_load_dword, because |
| * the instruction performs "addr + offset" in 64 bits. |
| * |
| * Expected usage for bindless textures by chaining GEPs: |
| * // possible unsigned wraparound, don't use InBounds: |
| * ptr1 = LLVMBuildGEP(base_ptr, index); |
| * image = load(ptr1); // becomes "s_load ptr1, 0" |
| * |
| * ptr2 = LLVMBuildInBoundsGEP(ptr1, 32 / elemsize); |
| * sampler = load(ptr2); // becomes "s_load ptr1, 32" thanks to InBounds |
| */ |
| static LLVMValueRef |
| ac_build_load_custom(struct ac_llvm_context *ctx, LLVMValueRef base_ptr, |
| LLVMValueRef index, bool uniform, bool invariant, |
| bool no_unsigned_wraparound) |
| { |
| LLVMValueRef pointer, result; |
| |
| if (no_unsigned_wraparound && |
| LLVMGetPointerAddressSpace(LLVMTypeOf(base_ptr)) == AC_ADDR_SPACE_CONST_32BIT) |
| pointer = LLVMBuildInBoundsGEP(ctx->builder, base_ptr, &index, 1, ""); |
| else |
| pointer = LLVMBuildGEP(ctx->builder, base_ptr, &index, 1, ""); |
| |
| 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, 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, false); |
| } |
| |
| /* This assumes that there is no unsigned integer wraparound during the address |
| * computation, excluding all GEPs within base_ptr. */ |
| 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, true); |
| } |
| |
| /* See ac_build_load_custom() documentation. */ |
| LLVMValueRef ac_build_load_to_sgpr_uint_wraparound(struct ac_llvm_context *ctx, |
| LLVMValueRef base_ptr, LLVMValueRef index) |
| { |
| return ac_build_load_custom(ctx, base_ptr, index, true, true, false); |
| } |
| |
| static unsigned get_load_cache_policy(struct ac_llvm_context *ctx, |
| unsigned cache_policy) |
| { |
| return cache_policy | |
| (ctx->chip_class >= GFX10 && cache_policy & ac_glc ? ac_dlc : 0); |
| } |
| |
| static void |
| ac_build_buffer_store_common(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef data, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| unsigned cache_policy, |
| bool use_format, |
| bool structurized) |
| { |
| LLVMValueRef args[6]; |
| int idx = 0; |
| args[idx++] = data; |
| args[idx++] = LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, ""); |
| if (structurized) |
| args[idx++] = vindex ? vindex : ctx->i32_0; |
| args[idx++] = voffset ? voffset : ctx->i32_0; |
| args[idx++] = soffset ? soffset : ctx->i32_0; |
| args[idx++] = LLVMConstInt(ctx->i32, cache_policy, 0); |
| const char *indexing_kind = structurized ? "struct" : "raw"; |
| char name[256], type_name[8]; |
| |
| ac_build_type_name_for_intr(LLVMTypeOf(data), type_name, sizeof(type_name)); |
| |
| if (use_format) { |
| snprintf(name, sizeof(name), "llvm.amdgcn.%s.buffer.store.format.%s", |
| indexing_kind, type_name); |
| } else { |
| snprintf(name, sizeof(name), "llvm.amdgcn.%s.buffer.store.%s", |
| indexing_kind, type_name); |
| } |
| |
| ac_build_intrinsic(ctx, name, ctx->voidt, args, idx, |
| AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY); |
| } |
| |
| void |
| ac_build_buffer_store_format(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef data, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| unsigned cache_policy) |
| { |
| ac_build_buffer_store_common(ctx, rsrc, data, vindex, voffset, NULL, |
| cache_policy, 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, |
| unsigned cache_policy) |
| { |
| /* Split 3 channel stores, because only LLVM 9+ support 3-channel |
| * intrinsics. */ |
| if (num_channels == 3 && !ac_has_vec3_support(ctx->chip_class, false)) { |
| 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, cache_policy); |
| ac_build_buffer_store_dword(ctx, rsrc, v[2], 1, voffset, |
| soffset, inst_offset + 8, |
| cache_policy); |
| return; |
| } |
| |
| /* 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 (!(cache_policy & ac_swizzled)) { |
| LLVMValueRef offset = soffset; |
| |
| if (inst_offset) |
| offset = LLVMBuildAdd(ctx->builder, offset, |
| LLVMConstInt(ctx->i32, inst_offset, 0), ""); |
| |
| ac_build_buffer_store_common(ctx, rsrc, ac_to_float(ctx, vdata), |
| ctx->i32_0, voffset, offset, |
| cache_policy, false, false); |
| return; |
| } |
| |
| static const unsigned dfmts[] = { |
| 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 |
| }; |
| unsigned dfmt = dfmts[num_channels - 1]; |
| unsigned nfmt = V_008F0C_BUF_NUM_FORMAT_UINT; |
| LLVMValueRef immoffset = LLVMConstInt(ctx->i32, inst_offset, 0); |
| |
| ac_build_raw_tbuffer_store(ctx, rsrc, vdata, voffset, soffset, |
| immoffset, num_channels, dfmt, nfmt, cache_policy); |
| } |
| |
| static LLVMValueRef |
| ac_build_buffer_load_common(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| unsigned num_channels, |
| LLVMTypeRef channel_type, |
| unsigned cache_policy, |
| bool can_speculate, |
| bool use_format, |
| bool structurized) |
| { |
| LLVMValueRef args[5]; |
| int idx = 0; |
| args[idx++] = LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, ""); |
| if (structurized) |
| args[idx++] = vindex ? vindex : ctx->i32_0; |
| args[idx++] = voffset ? voffset : ctx->i32_0; |
| args[idx++] = soffset ? soffset : ctx->i32_0; |
| args[idx++] = LLVMConstInt(ctx->i32, get_load_cache_policy(ctx, cache_policy), 0); |
| unsigned func = !ac_has_vec3_support(ctx->chip_class, use_format) && num_channels == 3 ? 4 : num_channels; |
| const char *indexing_kind = structurized ? "struct" : "raw"; |
| char name[256], type_name[8]; |
| |
| /* D16 is only supported on gfx8+ */ |
| assert(!use_format || |
| (channel_type != ctx->f16 && channel_type != ctx->i16) || |
| ctx->chip_class >= GFX8); |
| |
| LLVMTypeRef type = func > 1 ? LLVMVectorType(channel_type, func) : channel_type; |
| ac_build_type_name_for_intr(type, type_name, sizeof(type_name)); |
| |
| if (use_format) { |
| snprintf(name, sizeof(name), "llvm.amdgcn.%s.buffer.load.format.%s", |
| indexing_kind, type_name); |
| } else { |
| snprintf(name, sizeof(name), "llvm.amdgcn.%s.buffer.load.%s", |
| indexing_kind, type_name); |
| } |
| |
| return ac_build_intrinsic(ctx, name, type, args, idx, |
| ac_get_load_intr_attribs(can_speculate)); |
| } |
| |
| 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 cache_policy, |
| 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, ""); |
| |
| if (allow_smem && !(cache_policy & ac_slc) && |
| (!(cache_policy & ac_glc) || ctx->chip_class >= GFX8)) { |
| assert(vindex == NULL); |
| |
| LLVMValueRef result[8]; |
| |
| for (int i = 0; i < num_channels; i++) { |
| if (i) { |
| offset = LLVMBuildAdd(ctx->builder, offset, |
| LLVMConstInt(ctx->i32, 4, 0), ""); |
| } |
| LLVMValueRef args[3] = { |
| rsrc, |
| offset, |
| LLVMConstInt(ctx->i32, get_load_cache_policy(ctx, cache_policy), 0), |
| }; |
| result[i] = ac_build_intrinsic(ctx, |
| "llvm.amdgcn.s.buffer.load.f32", |
| ctx->f32, args, 3, |
| AC_FUNC_ATTR_READNONE); |
| } |
| if (num_channels == 1) |
| return result[0]; |
| |
| if (num_channels == 3 && !ac_has_vec3_support(ctx->chip_class, false)) |
| result[num_channels++] = LLVMGetUndef(ctx->f32); |
| return ac_build_gather_values(ctx, result, num_channels); |
| } |
| |
| return ac_build_buffer_load_common(ctx, rsrc, vindex, |
| offset, ctx->i32_0, |
| num_channels, ctx->f32, |
| cache_policy, |
| can_speculate, false, false); |
| } |
| |
| LLVMValueRef ac_build_buffer_load_format(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| unsigned num_channels, |
| unsigned cache_policy, |
| bool can_speculate, |
| bool d16) |
| { |
| return ac_build_buffer_load_common(ctx, rsrc, vindex, voffset, |
| ctx->i32_0, num_channels, |
| d16 ? ctx->f16 : ctx->f32, |
| cache_policy, can_speculate, |
| true, true); |
| } |
| |
| static LLVMValueRef |
| ac_build_tbuffer_load(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| LLVMValueRef immoffset, |
| unsigned num_channels, |
| unsigned dfmt, |
| unsigned nfmt, |
| unsigned cache_policy, |
| bool can_speculate, |
| bool structurized) |
| { |
| voffset = LLVMBuildAdd(ctx->builder, voffset, immoffset, ""); |
| |
| LLVMValueRef args[6]; |
| int idx = 0; |
| args[idx++] = LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, ""); |
| if (structurized) |
| args[idx++] = vindex ? vindex : ctx->i32_0; |
| args[idx++] = voffset ? voffset : ctx->i32_0; |
| args[idx++] = soffset ? soffset : ctx->i32_0; |
| args[idx++] = LLVMConstInt(ctx->i32, ac_get_tbuffer_format(ctx->chip_class, dfmt, nfmt), 0); |
| args[idx++] = LLVMConstInt(ctx->i32, get_load_cache_policy(ctx, cache_policy), 0); |
| unsigned func = !ac_has_vec3_support(ctx->chip_class, true) && num_channels == 3 ? 4 : num_channels; |
| const char *indexing_kind = structurized ? "struct" : "raw"; |
| char name[256], type_name[8]; |
| |
| LLVMTypeRef type = func > 1 ? LLVMVectorType(ctx->i32, func) : ctx->i32; |
| ac_build_type_name_for_intr(type, type_name, sizeof(type_name)); |
| |
| snprintf(name, sizeof(name), "llvm.amdgcn.%s.tbuffer.load.%s", |
| indexing_kind, type_name); |
| |
| return ac_build_intrinsic(ctx, name, type, args, idx, |
| ac_get_load_intr_attribs(can_speculate)); |
| } |
| |
| LLVMValueRef |
| ac_build_struct_tbuffer_load(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| LLVMValueRef immoffset, |
| unsigned num_channels, |
| unsigned dfmt, |
| unsigned nfmt, |
| unsigned cache_policy, |
| bool can_speculate) |
| { |
| return ac_build_tbuffer_load(ctx, rsrc, vindex, voffset, soffset, |
| immoffset, num_channels, dfmt, nfmt, |
| cache_policy, can_speculate, true); |
| } |
| |
| LLVMValueRef |
| ac_build_raw_tbuffer_load(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| LLVMValueRef immoffset, |
| unsigned num_channels, |
| unsigned dfmt, |
| unsigned nfmt, |
| unsigned cache_policy, |
| bool can_speculate) |
| { |
| return ac_build_tbuffer_load(ctx, rsrc, NULL, voffset, soffset, |
| immoffset, num_channels, dfmt, nfmt, |
| cache_policy, can_speculate, false); |
| } |
| |
| LLVMValueRef |
| ac_build_tbuffer_load_short(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| LLVMValueRef immoffset, |
| unsigned cache_policy) |
| { |
| LLVMValueRef res; |
| |
| if (LLVM_VERSION_MAJOR >= 9) { |
| voffset = LLVMBuildAdd(ctx->builder, voffset, immoffset, ""); |
| |
| /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */ |
| res = ac_build_buffer_load_common(ctx, rsrc, NULL, |
| voffset, soffset, |
| 1, ctx->i16, cache_policy, |
| false, false, false); |
| } else { |
| unsigned dfmt = V_008F0C_BUF_DATA_FORMAT_16; |
| unsigned nfmt = V_008F0C_BUF_NUM_FORMAT_UINT; |
| |
| res = ac_build_raw_tbuffer_load(ctx, rsrc, voffset, soffset, |
| immoffset, 1, dfmt, nfmt, cache_policy, |
| false); |
| |
| res = LLVMBuildTrunc(ctx->builder, res, ctx->i16, ""); |
| } |
| |
| return res; |
| } |
| |
| LLVMValueRef |
| ac_build_tbuffer_load_byte(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| LLVMValueRef immoffset, |
| unsigned cache_policy) |
| { |
| LLVMValueRef res; |
| |
| if (LLVM_VERSION_MAJOR >= 9) { |
| voffset = LLVMBuildAdd(ctx->builder, voffset, immoffset, ""); |
| |
| /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */ |
| res = ac_build_buffer_load_common(ctx, rsrc, NULL, |
| voffset, soffset, |
| 1, ctx->i8, cache_policy, |
| false, false, false); |
| } else { |
| unsigned dfmt = V_008F0C_BUF_DATA_FORMAT_8; |
| unsigned nfmt = V_008F0C_BUF_NUM_FORMAT_UINT; |
| |
| res = ac_build_raw_tbuffer_load(ctx, rsrc, voffset, soffset, |
| immoffset, 1, dfmt, nfmt, cache_policy, |
| false); |
| |
| res = LLVMBuildTrunc(ctx->builder, res, ctx->i8, ""); |
| } |
| |
| return res; |
| } |
| |
| /** |
| * Convert an 11- or 10-bit unsigned floating point number to an f32. |
| * |
| * The input exponent is expected to be biased analogous to IEEE-754, i.e. by |
| * 2^(exp_bits-1) - 1 (as defined in OpenGL and other graphics APIs). |
| */ |
| static LLVMValueRef |
| ac_ufN_to_float(struct ac_llvm_context *ctx, LLVMValueRef src, unsigned exp_bits, unsigned mant_bits) |
| { |
| assert(LLVMTypeOf(src) == ctx->i32); |
| |
| LLVMValueRef tmp; |
| LLVMValueRef mantissa; |
| mantissa = LLVMBuildAnd(ctx->builder, src, LLVMConstInt(ctx->i32, (1 << mant_bits) - 1, false), ""); |
| |
| /* Converting normal numbers is just a shift + correcting the exponent bias */ |
| unsigned normal_shift = 23 - mant_bits; |
| unsigned bias_shift = 127 - ((1 << (exp_bits - 1)) - 1); |
| LLVMValueRef shifted, normal; |
| |
| shifted = LLVMBuildShl(ctx->builder, src, LLVMConstInt(ctx->i32, normal_shift, false), ""); |
| normal = LLVMBuildAdd(ctx->builder, shifted, LLVMConstInt(ctx->i32, bias_shift << 23, false), ""); |
| |
| /* Converting nan/inf numbers is the same, but with a different exponent update */ |
| LLVMValueRef naninf; |
| naninf = LLVMBuildOr(ctx->builder, normal, LLVMConstInt(ctx->i32, 0xff << 23, false), ""); |
| |
| /* Converting denormals is the complex case: determine the leading zeros of the |
| * mantissa to obtain the correct shift for the mantissa and exponent correction. |
| */ |
| LLVMValueRef denormal; |
| LLVMValueRef params[2] = { |
| mantissa, |
| ctx->i1true, /* result can be undef when arg is 0 */ |
| }; |
| LLVMValueRef ctlz = ac_build_intrinsic(ctx, "llvm.ctlz.i32", ctx->i32, |
| params, 2, AC_FUNC_ATTR_READNONE); |
| |
| /* Shift such that the leading 1 ends up as the LSB of the exponent field. */ |
| tmp = LLVMBuildSub(ctx->builder, ctlz, LLVMConstInt(ctx->i32, 8, false), ""); |
| denormal = LLVMBuildShl(ctx->builder, mantissa, tmp, ""); |
| |
| unsigned denormal_exp = bias_shift + (32 - mant_bits) - 1; |
| tmp = LLVMBuildSub(ctx->builder, LLVMConstInt(ctx->i32, denormal_exp, false), ctlz, ""); |
| tmp = LLVMBuildShl(ctx->builder, tmp, LLVMConstInt(ctx->i32, 23, false), ""); |
| denormal = LLVMBuildAdd(ctx->builder, denormal, tmp, ""); |
| |
| /* Select the final result. */ |
| LLVMValueRef result; |
| |
| tmp = LLVMBuildICmp(ctx->builder, LLVMIntUGE, src, |
| LLVMConstInt(ctx->i32, ((1 << exp_bits) - 1) << mant_bits, false), ""); |
| result = LLVMBuildSelect(ctx->builder, tmp, naninf, normal, ""); |
| |
| tmp = LLVMBuildICmp(ctx->builder, LLVMIntUGE, src, |
| LLVMConstInt(ctx->i32, 1 << mant_bits, false), ""); |
| result = LLVMBuildSelect(ctx->builder, tmp, result, denormal, ""); |
| |
| tmp = LLVMBuildICmp(ctx->builder, LLVMIntNE, src, ctx->i32_0, ""); |
| result = LLVMBuildSelect(ctx->builder, tmp, result, ctx->i32_0, ""); |
| |
| return ac_to_float(ctx, result); |
| } |
| |
| /** |
| * Generate a fully general open coded buffer format fetch with all required |
| * fixups suitable for vertex fetch, using non-format buffer loads. |
| * |
| * Some combinations of argument values have special interpretations: |
| * - size = 8 bytes, format = fixed indicates PIPE_FORMAT_R11G11B10_FLOAT |
| * - size = 8 bytes, format != {float,fixed} indicates a 2_10_10_10 data format |
| * |
| * \param log_size log(size of channel in bytes) |
| * \param num_channels number of channels (1 to 4) |
| * \param format AC_FETCH_FORMAT_xxx value |
| * \param reverse whether XYZ channels are reversed |
| * \param known_aligned whether the source is known to be aligned to hardware's |
| * effective element size for loading the given format |
| * (note: this means dword alignment for 8_8_8_8, 16_16, etc.) |
| * \param rsrc buffer resource descriptor |
| * \return the resulting vector of floats or integers bitcast to <4 x i32> |
| */ |
| LLVMValueRef |
| ac_build_opencoded_load_format(struct ac_llvm_context *ctx, |
| unsigned log_size, |
| unsigned num_channels, |
| unsigned format, |
| bool reverse, |
| bool known_aligned, |
| LLVMValueRef rsrc, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| unsigned cache_policy, |
| bool can_speculate) |
| { |
| LLVMValueRef tmp; |
| unsigned load_log_size = log_size; |
| unsigned load_num_channels = num_channels; |
| if (log_size == 3) { |
| load_log_size = 2; |
| if (format == AC_FETCH_FORMAT_FLOAT) { |
| load_num_channels = 2 * num_channels; |
| } else { |
| load_num_channels = 1; /* 10_11_11 or 2_10_10_10 */ |
| } |
| } |
| |
| int log_recombine = 0; |
| if ((ctx->chip_class == GFX6 || ctx->chip_class == GFX10) && !known_aligned) { |
| /* Avoid alignment restrictions by loading one byte at a time. */ |
| load_num_channels <<= load_log_size; |
| log_recombine = load_log_size; |
| load_log_size = 0; |
| } else if (load_num_channels == 2 || load_num_channels == 4) { |
| log_recombine = -util_logbase2(load_num_channels); |
| load_num_channels = 1; |
| load_log_size += -log_recombine; |
| } |
| |
| assert(load_log_size >= 2 || LLVM_VERSION_MAJOR >= 9); |
| |
| LLVMValueRef loads[32]; /* up to 32 bytes */ |
| for (unsigned i = 0; i < load_num_channels; ++i) { |
| tmp = LLVMBuildAdd(ctx->builder, soffset, |
| LLVMConstInt(ctx->i32, i << load_log_size, false), ""); |
| LLVMTypeRef channel_type = load_log_size == 0 ? ctx->i8 : |
| load_log_size == 1 ? ctx->i16 : ctx->i32; |
| unsigned num_channels = 1 << (MAX2(load_log_size, 2) - 2); |
| loads[i] = ac_build_buffer_load_common( |
| ctx, rsrc, vindex, voffset, tmp, |
| num_channels, channel_type, cache_policy, |
| can_speculate, false, true); |
| if (load_log_size >= 2) |
| loads[i] = ac_to_integer(ctx, loads[i]); |
| } |
| |
| if (log_recombine > 0) { |
| /* Recombine bytes if necessary (GFX6 only) */ |
| LLVMTypeRef dst_type = log_recombine == 2 ? ctx->i32 : ctx->i16; |
| |
| for (unsigned src = 0, dst = 0; src < load_num_channels; ++dst) { |
| LLVMValueRef accum = NULL; |
| for (unsigned i = 0; i < (1 << log_recombine); ++i, ++src) { |
| tmp = LLVMBuildZExt(ctx->builder, loads[src], dst_type, ""); |
| if (i == 0) { |
| accum = tmp; |
| } else { |
| tmp = LLVMBuildShl(ctx->builder, tmp, |
| LLVMConstInt(dst_type, 8 * i, false), ""); |
| accum = LLVMBuildOr(ctx->builder, accum, tmp, ""); |
| } |
| } |
| loads[dst] = accum; |
| } |
| } else if (log_recombine < 0) { |
| /* Split vectors of dwords */ |
| if (load_log_size > 2) { |
| assert(load_num_channels == 1); |
| LLVMValueRef loaded = loads[0]; |
| unsigned log_split = load_log_size - 2; |
| log_recombine += log_split; |
| load_num_channels = 1 << log_split; |
| load_log_size = 2; |
| for (unsigned i = 0; i < load_num_channels; ++i) { |
| tmp = LLVMConstInt(ctx->i32, i, false); |
| loads[i] = LLVMBuildExtractElement(ctx->builder, loaded, tmp, ""); |
| } |
| } |
| |
| /* Further split dwords and shorts if required */ |
| if (log_recombine < 0) { |
| for (unsigned src = load_num_channels, |
| dst = load_num_channels << -log_recombine; |
| src > 0; --src) { |
| unsigned dst_bits = 1 << (3 + load_log_size + log_recombine); |
| LLVMTypeRef dst_type = LLVMIntTypeInContext(ctx->context, dst_bits); |
| LLVMValueRef loaded = loads[src - 1]; |
| LLVMTypeRef loaded_type = LLVMTypeOf(loaded); |
| for (unsigned i = 1 << -log_recombine; i > 0; --i, --dst) { |
| tmp = LLVMConstInt(loaded_type, dst_bits * (i - 1), false); |
| tmp = LLVMBuildLShr(ctx->builder, loaded, tmp, ""); |
| loads[dst - 1] = LLVMBuildTrunc(ctx->builder, tmp, dst_type, ""); |
| } |
| } |
| } |
| } |
| |
| if (log_size == 3) { |
| if (format == AC_FETCH_FORMAT_FLOAT) { |
| for (unsigned i = 0; i < num_channels; ++i) { |
| tmp = ac_build_gather_values(ctx, &loads[2 * i], 2); |
| loads[i] = LLVMBuildBitCast(ctx->builder, tmp, ctx->f64, ""); |
| } |
| } else if (format == AC_FETCH_FORMAT_FIXED) { |
| /* 10_11_11_FLOAT */ |
| LLVMValueRef data = loads[0]; |
| LLVMValueRef i32_2047 = LLVMConstInt(ctx->i32, 2047, false); |
| LLVMValueRef r = LLVMBuildAnd(ctx->builder, data, i32_2047, ""); |
| tmp = LLVMBuildLShr(ctx->builder, data, LLVMConstInt(ctx->i32, 11, false), ""); |
| LLVMValueRef g = LLVMBuildAnd(ctx->builder, tmp, i32_2047, ""); |
| LLVMValueRef b = LLVMBuildLShr(ctx->builder, data, LLVMConstInt(ctx->i32, 22, false), ""); |
| |
| loads[0] = ac_to_integer(ctx, ac_ufN_to_float(ctx, r, 5, 6)); |
| loads[1] = ac_to_integer(ctx, ac_ufN_to_float(ctx, g, 5, 6)); |
| loads[2] = ac_to_integer(ctx, ac_ufN_to_float(ctx, b, 5, 5)); |
| |
| num_channels = 3; |
| log_size = 2; |
| format = AC_FETCH_FORMAT_FLOAT; |
| } else { |
| /* 2_10_10_10 data formats */ |
| LLVMValueRef data = loads[0]; |
| LLVMTypeRef i10 = LLVMIntTypeInContext(ctx->context, 10); |
| LLVMTypeRef i2 = LLVMIntTypeInContext(ctx->context, 2); |
| loads[0] = LLVMBuildTrunc(ctx->builder, data, i10, ""); |
| tmp = LLVMBuildLShr(ctx->builder, data, LLVMConstInt(ctx->i32, 10, false), ""); |
| loads[1] = LLVMBuildTrunc(ctx->builder, tmp, i10, ""); |
| tmp = LLVMBuildLShr(ctx->builder, data, LLVMConstInt(ctx->i32, 20, false), ""); |
| loads[2] = LLVMBuildTrunc(ctx->builder, tmp, i10, ""); |
| tmp = LLVMBuildLShr(ctx->builder, data, LLVMConstInt(ctx->i32, 30, false), ""); |
| loads[3] = LLVMBuildTrunc(ctx->builder, tmp, i2, ""); |
| |
| num_channels = 4; |
| } |
| } |
| |
| if (format == AC_FETCH_FORMAT_FLOAT) { |
| if (log_size != 2) { |
| for (unsigned chan = 0; chan < num_channels; ++chan) { |
| tmp = ac_to_float(ctx, loads[chan]); |
| if (log_size == 3) |
| tmp = LLVMBuildFPTrunc(ctx->builder, tmp, ctx->f32, ""); |
| else if (log_size == 1) |
| tmp = LLVMBuildFPExt(ctx->builder, tmp, ctx->f32, ""); |
| loads[chan] = ac_to_integer(ctx, tmp); |
| } |
| } |
| } else if (format == AC_FETCH_FORMAT_UINT) { |
| if (log_size != 2) { |
| for (unsigned chan = 0; chan < num_channels; ++chan) |
| loads[chan] = LLVMBuildZExt(ctx->builder, loads[chan], ctx->i32, ""); |
| } |
| } else if (format == AC_FETCH_FORMAT_SINT) { |
| if (log_size != 2) { |
| for (unsigned chan = 0; chan < num_channels; ++chan) |
| loads[chan] = LLVMBuildSExt(ctx->builder, loads[chan], ctx->i32, ""); |
| } |
| } else { |
| bool unsign = format == AC_FETCH_FORMAT_UNORM || |
| format == AC_FETCH_FORMAT_USCALED || |
| format == AC_FETCH_FORMAT_UINT; |
| |
| for (unsigned chan = 0; chan < num_channels; ++chan) { |
| if (unsign) { |
| tmp = LLVMBuildUIToFP(ctx->builder, loads[chan], ctx->f32, ""); |
| } else { |
| tmp = LLVMBuildSIToFP(ctx->builder, loads[chan], ctx->f32, ""); |
| } |
| |
| LLVMValueRef scale = NULL; |
| if (format == AC_FETCH_FORMAT_FIXED) { |
| assert(log_size == 2); |
| scale = LLVMConstReal(ctx->f32, 1.0 / 0x10000); |
| } else if (format == AC_FETCH_FORMAT_UNORM) { |
| unsigned bits = LLVMGetIntTypeWidth(LLVMTypeOf(loads[chan])); |
| scale = LLVMConstReal(ctx->f32, 1.0 / (((uint64_t)1 << bits) - 1)); |
| } else if (format == AC_FETCH_FORMAT_SNORM) { |
| unsigned bits = LLVMGetIntTypeWidth(LLVMTypeOf(loads[chan])); |
| scale = LLVMConstReal(ctx->f32, 1.0 / (((uint64_t)1 << (bits - 1)) - 1)); |
| } |
| if (scale) |
| tmp = LLVMBuildFMul(ctx->builder, tmp, scale, ""); |
| |
| if (format == AC_FETCH_FORMAT_SNORM) { |
| /* Clamp to [-1, 1] */ |
| LLVMValueRef neg_one = LLVMConstReal(ctx->f32, -1.0); |
| LLVMValueRef clamp = |
| LLVMBuildFCmp(ctx->builder, LLVMRealULT, tmp, neg_one, ""); |
| tmp = LLVMBuildSelect(ctx->builder, clamp, neg_one, tmp, ""); |
| } |
| |
| loads[chan] = ac_to_integer(ctx, tmp); |
| } |
| } |
| |
| while (num_channels < 4) { |
| if (format == AC_FETCH_FORMAT_UINT || format == AC_FETCH_FORMAT_SINT) { |
| loads[num_channels] = num_channels == 3 ? ctx->i32_1 : ctx->i32_0; |
| } else { |
| loads[num_channels] = ac_to_integer(ctx, num_channels == 3 ? ctx->f32_1 : ctx->f32_0); |
| } |
| num_channels++; |
| } |
| |
| if (reverse) { |
| tmp = loads[0]; |
| loads[0] = loads[2]; |
| loads[2] = tmp; |
| } |
| |
| return ac_build_gather_values(ctx, loads, 4); |
| } |
| |
| static void |
| ac_build_tbuffer_store(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vdata, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| LLVMValueRef immoffset, |
| unsigned num_channels, |
| unsigned dfmt, |
| unsigned nfmt, |
| unsigned cache_policy, |
| bool structurized) |
| { |
| voffset = LLVMBuildAdd(ctx->builder, voffset ? voffset : ctx->i32_0, |
| immoffset, ""); |
| |
| LLVMValueRef args[7]; |
| int idx = 0; |
| args[idx++] = vdata; |
| args[idx++] = LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, ""); |
| if (structurized) |
| args[idx++] = vindex ? vindex : ctx->i32_0; |
| args[idx++] = voffset ? voffset : ctx->i32_0; |
| args[idx++] = soffset ? soffset : ctx->i32_0; |
| args[idx++] = LLVMConstInt(ctx->i32, ac_get_tbuffer_format(ctx->chip_class, dfmt, nfmt), 0); |
| args[idx++] = LLVMConstInt(ctx->i32, cache_policy, 0); |
| unsigned func = !ac_has_vec3_support(ctx->chip_class, true) && num_channels == 3 ? 4 : num_channels; |
| const char *indexing_kind = structurized ? "struct" : "raw"; |
| char name[256], type_name[8]; |
| |
| LLVMTypeRef type = func > 1 ? LLVMVectorType(ctx->i32, func) : ctx->i32; |
| ac_build_type_name_for_intr(type, type_name, sizeof(type_name)); |
| |
| snprintf(name, sizeof(name), "llvm.amdgcn.%s.tbuffer.store.%s", |
| indexing_kind, type_name); |
| |
| ac_build_intrinsic(ctx, name, ctx->voidt, args, idx, |
| AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY); |
| } |
| |
| void |
| ac_build_struct_tbuffer_store(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vdata, |
| LLVMValueRef vindex, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| LLVMValueRef immoffset, |
| unsigned num_channels, |
| unsigned dfmt, |
| unsigned nfmt, |
| unsigned cache_policy) |
| { |
| ac_build_tbuffer_store(ctx, rsrc, vdata, vindex, voffset, soffset, |
| immoffset, num_channels, dfmt, nfmt, cache_policy, |
| true); |
| } |
| |
| void |
| ac_build_raw_tbuffer_store(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vdata, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| LLVMValueRef immoffset, |
| unsigned num_channels, |
| unsigned dfmt, |
| unsigned nfmt, |
| unsigned cache_policy) |
| { |
| ac_build_tbuffer_store(ctx, rsrc, vdata, NULL, voffset, soffset, |
| immoffset, num_channels, dfmt, nfmt, cache_policy, |
| false); |
| } |
| |
| void |
| ac_build_tbuffer_store_short(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vdata, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| unsigned cache_policy) |
| { |
| vdata = LLVMBuildBitCast(ctx->builder, vdata, ctx->i16, ""); |
| |
| if (LLVM_VERSION_MAJOR >= 9) { |
| /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */ |
| ac_build_buffer_store_common(ctx, rsrc, vdata, NULL, |
| voffset, soffset, cache_policy, |
| false, false); |
| } else { |
| unsigned dfmt = V_008F0C_BUF_DATA_FORMAT_16; |
| unsigned nfmt = V_008F0C_BUF_NUM_FORMAT_UINT; |
| |
| vdata = LLVMBuildZExt(ctx->builder, vdata, ctx->i32, ""); |
| |
| ac_build_raw_tbuffer_store(ctx, rsrc, vdata, voffset, soffset, |
| ctx->i32_0, 1, dfmt, nfmt, cache_policy); |
| } |
| } |
| |
| void |
| ac_build_tbuffer_store_byte(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc, |
| LLVMValueRef vdata, |
| LLVMValueRef voffset, |
| LLVMValueRef soffset, |
| unsigned cache_policy) |
| { |
| vdata = LLVMBuildBitCast(ctx->builder, vdata, ctx->i8, ""); |
| |
| if (LLVM_VERSION_MAJOR >= 9) { |
| /* LLVM 9+ supports i8/i16 with struct/raw intrinsics. */ |
| ac_build_buffer_store_common(ctx, rsrc, vdata, NULL, |
| voffset, soffset, cache_policy, |
| false, false); |
| } else { |
| unsigned dfmt = V_008F0C_BUF_DATA_FORMAT_8; |
| unsigned nfmt = V_008F0C_BUF_NUM_FORMAT_UINT; |
| |
| vdata = LLVMBuildZExt(ctx->builder, vdata, ctx->i32, ""); |
| |
| ac_build_raw_tbuffer_store(ctx, rsrc, vdata, voffset, soffset, |
| ctx->i32_0, 1, dfmt, nfmt, cache_policy); |
| } |
| } |
| /** |
| * 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] = ctx->i32_0; |
| tid_args[1] = ac_build_intrinsic(ctx, |
| "llvm.amdgcn.mbcnt.lo", ctx->i32, |
| tid_args, 2, AC_FUNC_ATTR_READNONE); |
| |
| if (ctx->wave_size == 32) { |
| tid = tid_args[1]; |
| } else { |
| tid = ac_build_intrinsic(ctx, "llvm.amdgcn.mbcnt.hi", |
| ctx->i32, tid_args, |
| 2, AC_FUNC_ATTR_READNONE); |
| } |
| set_range_metadata(ctx, tid, 0, ctx->wave_size); |
| return tid; |
| } |
| |
| /* |
| * AMD GCN 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) |
| { |
| unsigned tl_lanes[4], trbl_lanes[4]; |
| char name[32], type[8]; |
| LLVMValueRef tl, trbl; |
| LLVMTypeRef result_type; |
| LLVMValueRef result; |
| |
| result_type = ac_to_float_type(ctx, LLVMTypeOf(val)); |
| |
| if (result_type == ctx->f16) |
| val = LLVMBuildZExt(ctx->builder, val, ctx->i32, ""); |
| else if (result_type == ctx->v2f16) |
| val = LLVMBuildBitCast(ctx->builder, val, ctx->i32, ""); |
| |
| for (unsigned i = 0; i < 4; ++i) { |
| tl_lanes[i] = i & mask; |
| trbl_lanes[i] = (i & mask) + idx; |
| } |
| |
| tl = ac_build_quad_swizzle(ctx, val, |
| tl_lanes[0], tl_lanes[1], |
| tl_lanes[2], tl_lanes[3]); |
| trbl = ac_build_quad_swizzle(ctx, val, |
| trbl_lanes[0], trbl_lanes[1], |
| trbl_lanes[2], trbl_lanes[3]); |
| |
| if (result_type == ctx->f16) { |
| tl = LLVMBuildTrunc(ctx->builder, tl, ctx->i16, ""); |
| trbl = LLVMBuildTrunc(ctx->builder, trbl, ctx->i16, ""); |
| } |
| |
| tl = LLVMBuildBitCast(ctx->builder, tl, result_type, ""); |
| trbl = LLVMBuildBitCast(ctx->builder, trbl, result_type, ""); |
| result = LLVMBuildFSub(ctx->builder, trbl, tl, ""); |
| |
| ac_build_type_name_for_intr(result_type, type, sizeof(type)); |
| snprintf(name, sizeof(name), "llvm.amdgcn.wqm.%s", type); |
| |
| return ac_build_intrinsic(ctx, name, result_type, &result, 1, 0); |
| } |
| |
| void |
| ac_build_sendmsg(struct ac_llvm_context *ctx, |
| uint32_t msg, |
| LLVMValueRef wave_id) |
| { |
| LLVMValueRef args[2]; |
| args[0] = LLVMConstInt(ctx->i32, msg, false); |
| args[1] = wave_id; |
| ac_build_intrinsic(ctx, "llvm.amdgcn.s.sendmsg", ctx->voidt, args, 2, 0); |
| } |
| |
| LLVMValueRef |
| ac_build_imsb(struct ac_llvm_context *ctx, |
| LLVMValueRef arg, |
| LLVMTypeRef dst_type) |
| { |
| LLVMValueRef msb = ac_build_intrinsic(ctx, "llvm.amdgcn.sffbh.i32", |
| 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, ctx->i32_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) |
| { |
| const char *intrin_name; |
| LLVMTypeRef type; |
| LLVMValueRef highest_bit; |
| LLVMValueRef zero; |
| unsigned bitsize; |
| |
| bitsize = ac_get_elem_bits(ctx, LLVMTypeOf(arg)); |
| switch (bitsize) { |
| case 64: |
| intrin_name = "llvm.ctlz.i64"; |
| type = ctx->i64; |
| highest_bit = LLVMConstInt(ctx->i64, 63, false); |
| zero = ctx->i64_0; |
| break; |
| case 32: |
| intrin_name = "llvm.ctlz.i32"; |
| type = ctx->i32; |
| highest_bit = LLVMConstInt(ctx->i32, 31, false); |
| zero = ctx->i32_0; |
| break; |
| case 16: |
| intrin_name = "llvm.ctlz.i16"; |
| type = ctx->i16; |
| highest_bit = LLVMConstInt(ctx->i16, 15, false); |
| zero = ctx->i16_0; |
| break; |
| case 8: |
| intrin_name = "llvm.ctlz.i8"; |
| type = ctx->i8; |
| highest_bit = LLVMConstInt(ctx->i8, 7, false); |
| zero = ctx->i8_0; |
| break; |
| default: |
| unreachable(!"invalid bitsize"); |
| break; |
| } |
| |
| LLVMValueRef params[2] = { |
| arg, |
| ctx->i1true, |
| }; |
| |
| LLVMValueRef msb = ac_build_intrinsic(ctx, intrin_name, type, |
| params, 2, |
| 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, highest_bit, msb, ""); |
| |
| if (bitsize == 64) { |
| msb = LLVMBuildTrunc(ctx->builder, msb, ctx->i32, ""); |
| } else if (bitsize < 32) { |
| msb = LLVMBuildSExt(ctx->builder, msb, ctx->i32, ""); |
| } |
| |
| /* check for zero */ |
| return LLVMBuildSelect(ctx->builder, |
| LLVMBuildICmp(ctx->builder, LLVMIntEQ, arg, zero, ""), |
| LLVMConstInt(ctx->i32, -1, true), msb, ""); |
| } |
| |
| LLVMValueRef ac_build_fmin(struct ac_llvm_context *ctx, LLVMValueRef a, |
| LLVMValueRef b) |
| { |
| char name[64], type[64]; |
| |
| ac_build_type_name_for_intr(LLVMTypeOf(a), type, sizeof(type)); |
| snprintf(name, sizeof(name), "llvm.minnum.%s", type); |
| LLVMValueRef args[2] = {a, b}; |
| return ac_build_intrinsic(ctx, name, LLVMTypeOf(a), args, 2, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| LLVMValueRef ac_build_fmax(struct ac_llvm_context *ctx, LLVMValueRef a, |
| LLVMValueRef b) |
| { |
| char name[64], type[64]; |
| |
| ac_build_type_name_for_intr(LLVMTypeOf(a), type, sizeof(type)); |
| snprintf(name, sizeof(name), "llvm.maxnum.%s", type); |
| LLVMValueRef args[2] = {a, b}; |
| return ac_build_intrinsic(ctx, name, LLVMTypeOf(a), args, 2, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| LLVMValueRef ac_build_imin(struct ac_llvm_context *ctx, LLVMValueRef a, |
| LLVMValueRef b) |
| { |
| LLVMValueRef cmp = LLVMBuildICmp(ctx->builder, LLVMIntSLE, a, b, ""); |
| return LLVMBuildSelect(ctx->builder, cmp, a, b, ""); |
| } |
| |
| LLVMValueRef ac_build_imax(struct ac_llvm_context *ctx, LLVMValueRef a, |
| LLVMValueRef b) |
| { |
| LLVMValueRef cmp = LLVMBuildICmp(ctx->builder, LLVMIntSGT, a, b, ""); |
| return LLVMBuildSelect(ctx->builder, cmp, a, b, ""); |
| } |
| |
| 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_umax(struct ac_llvm_context *ctx, LLVMValueRef a, |
| LLVMValueRef b) |
| { |
| LLVMValueRef cmp = LLVMBuildICmp(ctx->builder, LLVMIntUGE, a, b, ""); |
| return LLVMBuildSelect(ctx->builder, cmp, a, b, ""); |
| } |
| |
| LLVMValueRef ac_build_clamp(struct ac_llvm_context *ctx, LLVMValueRef value) |
| { |
| LLVMTypeRef t = LLVMTypeOf(value); |
| return ac_build_fmin(ctx, ac_build_fmax(ctx, value, LLVMConstReal(t, 0.0)), |
| LLVMConstReal(t, 1.0)); |
| } |
| |
| void ac_build_export(struct ac_llvm_context *ctx, struct ac_export_args *a) |
| { |
| LLVMValueRef args[9]; |
| |
| args[0] = LLVMConstInt(ctx->i32, a->target, 0); |
| args[1] = LLVMConstInt(ctx->i32, a->enabled_channels, 0); |
| |
| if (a->compr) { |
| args[2] = LLVMBuildBitCast(ctx->builder, a->out[0], |
| ctx->v2i16, ""); |
| args[3] = LLVMBuildBitCast(ctx->builder, a->out[1], |
| ctx->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); |
| } |
| } |
| |
| void ac_build_export_null(struct ac_llvm_context *ctx) |
| { |
| 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] = LLVMGetUndef(ctx->f32); /* R */ |
| args.out[1] = LLVMGetUndef(ctx->f32); /* G */ |
| args.out[2] = LLVMGetUndef(ctx->f32); /* B */ |
| args.out[3] = LLVMGetUndef(ctx->f32); /* A */ |
| |
| ac_build_export(ctx, &args); |
| } |
| |
| static unsigned ac_num_coords(enum ac_image_dim dim) |
| { |
| switch (dim) { |
| case ac_image_1d: |
| return 1; |
| case ac_image_2d: |
| case ac_image_1darray: |
| return 2; |
| case ac_image_3d: |
| case ac_image_cube: |
| case ac_image_2darray: |
| case ac_image_2dmsaa: |
| return 3; |
| case ac_image_2darraymsaa: |
| return 4; |
| default: |
| unreachable("ac_num_coords: bad dim"); |
| } |
| } |
| |
| static unsigned ac_num_derivs(enum ac_image_dim dim) |
| { |
| switch (dim) { |
| case ac_image_1d: |
| case ac_image_1darray: |
| return 2; |
| case ac_image_2d: |
| case ac_image_2darray: |
| case ac_image_cube: |
| return 4; |
| case ac_image_3d: |
| return 6; |
| case ac_image_2dmsaa: |
| case ac_image_2darraymsaa: |
| default: |
| unreachable("derivatives not supported"); |
| } |
| } |
| |
| static const char *get_atomic_name(enum ac_atomic_op op) |
| { |
| switch (op) { |
| case ac_atomic_swap: return "swap"; |
| case ac_atomic_add: return "add"; |
| case ac_atomic_sub: return "sub"; |
| case ac_atomic_smin: return "smin"; |
| case ac_atomic_umin: return "umin"; |
| case ac_atomic_smax: return "smax"; |
| case ac_atomic_umax: return "umax"; |
| case ac_atomic_and: return "and"; |
| case ac_atomic_or: return "or"; |
| case ac_atomic_xor: return "xor"; |
| case ac_atomic_inc_wrap: return "inc"; |
| case ac_atomic_dec_wrap: return "dec"; |
| } |
| unreachable("bad atomic op"); |
| } |
| |
| LLVMValueRef ac_build_image_opcode(struct ac_llvm_context *ctx, |
| struct ac_image_args *a) |
| { |
| const char *overload[3] = { "", "", "" }; |
| unsigned num_overloads = 0; |
| LLVMValueRef args[18]; |
| unsigned num_args = 0; |
| enum ac_image_dim dim = a->dim; |
| |
| assert(!a->lod || a->lod == ctx->i32_0 || a->lod == ctx->f32_0 || |
| !a->level_zero); |
| assert((a->opcode != ac_image_get_resinfo && a->opcode != ac_image_load_mip && |
| a->opcode != ac_image_store_mip) || |
| a->lod); |
| assert(a->opcode == ac_image_sample || a->opcode == ac_image_gather4 || |
| (!a->compare && !a->offset)); |
| assert((a->opcode == ac_image_sample || a->opcode == ac_image_gather4 || |
| a->opcode == ac_image_get_lod) || |
| !a->bias); |
| assert((a->bias ? 1 : 0) + |
| (a->lod ? 1 : 0) + |
| (a->level_zero ? 1 : 0) + |
| (a->derivs[0] ? 1 : 0) <= 1); |
| assert((a->min_lod ? 1 : 0) + |
| (a->lod ? 1 : 0) + |
| (a->level_zero ? 1 : 0) <= 1); |
| assert(!a->d16 || (ctx->chip_class >= GFX8 && |
| a->opcode != ac_image_atomic && |
| a->opcode != ac_image_atomic_cmpswap && |
| a->opcode != ac_image_get_lod && |
| a->opcode != ac_image_get_resinfo)); |
| |
| if (a->opcode == ac_image_get_lod) { |
| switch (dim) { |
| case ac_image_1darray: |
| dim = ac_image_1d; |
| break; |
| case ac_image_2darray: |
| case ac_image_cube: |
| dim = ac_image_2d; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| bool sample = a->opcode == ac_image_sample || |
| a->opcode == ac_image_gather4 || |
| a->opcode == ac_image_get_lod; |
| bool atomic = a->opcode == ac_image_atomic || |
| a->opcode == ac_image_atomic_cmpswap; |
| bool load = a->opcode == ac_image_sample || |
| a->opcode == ac_image_gather4 || |
| a->opcode == ac_image_load || |
| a->opcode == ac_image_load_mip; |
| LLVMTypeRef coord_type = sample ? ctx->f32 : ctx->i32; |
| |
| if (atomic || a->opcode == ac_image_store || a->opcode == ac_image_store_mip) { |
| args[num_args++] = a->data[0]; |
| if (a->opcode == ac_image_atomic_cmpswap) |
| args[num_args++] = a->data[1]; |
| } |
| |
| if (!atomic) |
| args[num_args++] = LLVMConstInt(ctx->i32, a->dmask, false); |
| |
| if (a->offset) |
| args[num_args++] = ac_to_integer(ctx, a->offset); |
| if (a->bias) { |
| args[num_args++] = ac_to_float(ctx, a->bias); |
| overload[num_overloads++] = ".f32"; |
| } |
| if (a->compare) |
| args[num_args++] = ac_to_float(ctx, a->compare); |
| if (a->derivs[0]) { |
| unsigned count = ac_num_derivs(dim); |
| for (unsigned i = 0; i < count; ++i) |
| args[num_args++] = ac_to_float(ctx, a->derivs[i]); |
| overload[num_overloads++] = ".f32"; |
| } |
| unsigned num_coords = |
| a->opcode != ac_image_get_resinfo ? ac_num_coords(dim) : 0; |
| for (unsigned i = 0; i < num_coords; ++i) |
| args[num_args++] = LLVMBuildBitCast(ctx->builder, a->coords[i], coord_type, ""); |
| if (a->lod) |
| args[num_args++] = LLVMBuildBitCast(ctx->builder, a->lod, coord_type, ""); |
| if (a->min_lod) |
| args[num_args++] = LLVMBuildBitCast(ctx->builder, a->min_lod, coord_type, ""); |
| |
| overload[num_overloads++] = sample ? ".f32" : ".i32"; |
| |
| args[num_args++] = a->resource; |
| if (sample) { |
| args[num_args++] = a->sampler; |
| args[num_args++] = LLVMConstInt(ctx->i1, a->unorm, false); |
| } |
| |
| args[num_args++] = ctx->i32_0; /* texfailctrl */ |
| args[num_args++] = LLVMConstInt(ctx->i32, |
| load ? get_load_cache_policy(ctx, a->cache_policy) : |
| a->cache_policy, false); |
| |
| const char *name; |
| const char *atomic_subop = ""; |
| switch (a->opcode) { |
| case ac_image_sample: name = "sample"; break; |
| case ac_image_gather4: name = "gather4"; break; |
| case ac_image_load: name = "load"; break; |
| case ac_image_load_mip: name = "load.mip"; break; |
| case ac_image_store: name = "store"; break; |
| case ac_image_store_mip: name = "store.mip"; break; |
| case ac_image_atomic: |
| name = "atomic."; |
| atomic_subop = get_atomic_name(a->atomic); |
| break; |
| case ac_image_atomic_cmpswap: |
| name = "atomic."; |
| atomic_subop = "cmpswap"; |
| break; |
| case ac_image_get_lod: name = "getlod"; break; |
| case ac_image_get_resinfo: name = "getresinfo"; break; |
| default: unreachable("invalid image opcode"); |
| } |
| |
| const char *dimname; |
| switch (dim) { |
| case ac_image_1d: dimname = "1d"; break; |
| case ac_image_2d: dimname = "2d"; break; |
| case ac_image_3d: dimname = "3d"; break; |
| case ac_image_cube: dimname = "cube"; break; |
| case ac_image_1darray: dimname = "1darray"; break; |
| case ac_image_2darray: dimname = "2darray"; break; |
| case ac_image_2dmsaa: dimname = "2dmsaa"; break; |
| case ac_image_2darraymsaa: dimname = "2darraymsaa"; break; |
| default: unreachable("invalid dim"); |
| } |
| |
| bool lod_suffix = |
| a->lod && (a->opcode == ac_image_sample || a->opcode == ac_image_gather4); |
| char intr_name[96]; |
| snprintf(intr_name, sizeof(intr_name), |
| "llvm.amdgcn.image.%s%s" /* base name */ |
| "%s%s%s%s" /* sample/gather modifiers */ |
| ".%s.%s%s%s%s", /* dimension and type overloads */ |
| name, atomic_subop, |
| a->compare ? ".c" : "", |
| a->bias ? ".b" : |
| lod_suffix ? ".l" : |
| a->derivs[0] ? ".d" : |
| a->level_zero ? ".lz" : "", |
| a->min_lod ? ".cl" : "", |
| a->offset ? ".o" : "", |
| dimname, |
| atomic ? "i32" : (a->d16 ? "v4f16" : "v4f32"), |
| overload[0], overload[1], overload[2]); |
| |
| LLVMTypeRef retty; |
| if (atomic) |
| retty = ctx->i32; |
| else if (a->opcode == ac_image_store || a->opcode == ac_image_store_mip) |
| retty = ctx->voidt; |
| else |
| retty = a->d16 ? ctx->v4f16 : ctx->v4f32; |
| |
| LLVMValueRef result = |
| ac_build_intrinsic(ctx, intr_name, retty, args, num_args, |
| a->attributes); |
| if (!sample && !atomic && retty != ctx->voidt) |
| result = ac_to_integer(ctx, result); |
| |
| return result; |
| } |
| |
| LLVMValueRef ac_build_image_get_sample_count(struct ac_llvm_context *ctx, |
| LLVMValueRef rsrc) |
| { |
| LLVMValueRef samples; |
| |
| /* Read the samples from the descriptor directly. |
| * Hardware doesn't have any instruction for this. |
| */ |
| samples = LLVMBuildExtractElement(ctx->builder, rsrc, |
| LLVMConstInt(ctx->i32, 3, 0), ""); |
| samples = LLVMBuildLShr(ctx->builder, samples, |
| LLVMConstInt(ctx->i32, 16, 0), ""); |
| samples = LLVMBuildAnd(ctx->builder, samples, |
| LLVMConstInt(ctx->i32, 0xf, 0), ""); |
| samples = LLVMBuildShl(ctx->builder, ctx->i32_1, |
| samples, ""); |
| return samples; |
| } |
| |
| LLVMValueRef ac_build_cvt_pkrtz_f16(struct ac_llvm_context *ctx, |
| LLVMValueRef args[2]) |
| { |
| return ac_build_intrinsic(ctx, "llvm.amdgcn.cvt.pkrtz", ctx->v2f16, |
| args, 2, AC_FUNC_ATTR_READNONE); |
| } |
| |
| LLVMValueRef ac_build_cvt_pknorm_i16(struct ac_llvm_context *ctx, |
| LLVMValueRef args[2]) |
| { |
| LLVMValueRef res = |
| ac_build_intrinsic(ctx, "llvm.amdgcn.cvt.pknorm.i16", |
| ctx->v2i16, args, 2, |
| AC_FUNC_ATTR_READNONE); |
| return LLVMBuildBitCast(ctx->builder, res, ctx->i32, ""); |
| } |
| |
| LLVMValueRef ac_build_cvt_pknorm_u16(struct ac_llvm_context *ctx, |
| LLVMValueRef args[2]) |
| { |
| LLVMValueRef res = |
| ac_build_intrinsic(ctx, "llvm.amdgcn.cvt.pknorm.u16", |
| ctx->v2i16, args, 2, |
| AC_FUNC_ATTR_READNONE); |
| return LLVMBuildBitCast(ctx->builder, res, ctx->i32, ""); |
| } |
| |
| /* The 8-bit and 10-bit clamping is for HW workarounds. */ |
| LLVMValueRef ac_build_cvt_pk_i16(struct ac_llvm_context *ctx, |
| LLVMValueRef args[2], unsigned bits, bool hi) |
| { |
| assert(bits == 8 || bits == 10 || bits == 16); |
| |
| LLVMValueRef max_rgb = LLVMConstInt(ctx->i32, |
| bits == 8 ? 127 : bits == 10 ? 511 : 32767, 0); |
| LLVMValueRef min_rgb = LLVMConstInt(ctx->i32, |
| bits == 8 ? -128 : bits == 10 ? -512 : -32768, 0); |
| LLVMValueRef max_alpha = |
| bits != 10 ? max_rgb : ctx->i32_1; |
| LLVMValueRef min_alpha = |
| bits != 10 ? min_rgb : LLVMConstInt(ctx->i32, -2, 0); |
| |
| /* Clamp. */ |
| if (bits != 16) { |
| for (int i = 0; i < 2; i++) { |
| bool alpha = hi && i == 1; |
| args[i] = ac_build_imin(ctx, args[i], |
| alpha ? max_alpha : max_rgb); |
| args[i] = ac_build_imax(ctx, args[i], |
| alpha ? min_alpha : min_rgb); |
| } |
| } |
| |
| LLVMValueRef res = |
| ac_build_intrinsic(ctx, "llvm.amdgcn.cvt.pk.i16", |
| ctx->v2i16, args, 2, |
| AC_FUNC_ATTR_READNONE); |
| return LLVMBuildBitCast(ctx->builder, res, ctx->i32, ""); |
| } |
| |
| /* The 8-bit and 10-bit clamping is for HW workarounds. */ |
| LLVMValueRef ac_build_cvt_pk_u16(struct ac_llvm_context *ctx, |
| LLVMValueRef args[2], unsigned bits, bool hi) |
| { |
| assert(bits == 8 || bits == 10 || bits == 16); |
| |
| LLVMValueRef max_rgb = LLVMConstInt(ctx->i32, |
| bits == 8 ? 255 : bits == 10 ? 1023 : 65535, 0); |
| LLVMValueRef max_alpha = |
| bits != 10 ? max_rgb : LLVMConstInt(ctx->i32, 3, 0); |
| |
| /* Clamp. */ |
| if (bits != 16) { |
| for (int i = 0; i < 2; i++) { |
| bool alpha = hi && i == 1; |
| args[i] = ac_build_umin(ctx, args[i], |
| alpha ? max_alpha : max_rgb); |
| } |
| } |
| |
| LLVMValueRef res = |
| ac_build_intrinsic(ctx, "llvm.amdgcn.cvt.pk.u16", |
| ctx->v2i16, args, 2, |
| AC_FUNC_ATTR_READNONE); |
| return LLVMBuildBitCast(ctx->builder, res, ctx->i32, ""); |
| } |
| |
| LLVMValueRef ac_build_wqm_vote(struct ac_llvm_context *ctx, LLVMValueRef i1) |
| { |
| 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) |
| { |
| ac_build_intrinsic(ctx, "llvm.amdgcn.kill", ctx->voidt, |
| &i1, 1, 0); |
| } |
| |
| LLVMValueRef ac_build_bfe(struct ac_llvm_context *ctx, LLVMValueRef input, |
| LLVMValueRef offset, LLVMValueRef width, |
| bool is_signed) |
| { |
| LLVMValueRef args[] = { |
| input, |
| offset, |
| width, |
| }; |
| |
| return ac_build_intrinsic(ctx, is_signed ? "llvm.amdgcn.sbfe.i32" : |
| "llvm.amdgcn.ubfe.i32", |
| ctx->i32, args, 3, AC_FUNC_ATTR_READNONE); |
| |
| } |
| |
| LLVMValueRef ac_build_imad(struct ac_llvm_context *ctx, LLVMValueRef s0, |
| LLVMValueRef s1, LLVMValueRef s2) |
| { |
| return LLVMBuildAdd(ctx->builder, |
| LLVMBuildMul(ctx->builder, s0, s1, ""), s2, ""); |
| } |
| |
| LLVMValueRef ac_build_fmad(struct ac_llvm_context *ctx, LLVMValueRef s0, |
| LLVMValueRef s1, LLVMValueRef s2) |
| { |
| /* FMA is better on GFX10, because it has FMA units instead of MUL-ADD units. */ |
| if (ctx->chip_class >= GFX10) { |
| return ac_build_intrinsic(ctx, "llvm.fma.f32", ctx->f32, |
| (LLVMValueRef []) {s0, s1, s2}, 3, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| return LLVMBuildFAdd(ctx->builder, |
| LLVMBuildFMul(ctx->builder, s0, s1, ""), s2, ""); |
| } |
| |
| void ac_build_waitcnt(struct ac_llvm_context *ctx, unsigned wait_flags) |
| { |
| if (!wait_flags) |
| return; |
| |
| unsigned lgkmcnt = 63; |
| unsigned vmcnt = ctx->chip_class >= GFX9 ? 63 : 15; |
| unsigned vscnt = 63; |
| |
| if (wait_flags & AC_WAIT_LGKM) |
| lgkmcnt = 0; |
| if (wait_flags & AC_WAIT_VLOAD) |
| vmcnt = 0; |
| |
| if (wait_flags & AC_WAIT_VSTORE) { |
| if (ctx->chip_class >= GFX10) |
| vscnt = 0; |
| else |
| vmcnt = 0; |
| } |
| |
| /* There is no intrinsic for vscnt(0), so use a fence. */ |
| if ((wait_flags & AC_WAIT_LGKM && |
| wait_flags & AC_WAIT_VLOAD && |
| wait_flags & AC_WAIT_VSTORE) || |
| vscnt == 0) { |
| LLVMBuildFence(ctx->builder, LLVMAtomicOrderingRelease, false, ""); |
| return; |
| } |
| |
| unsigned simm16 = (lgkmcnt << 8) | |
| (7 << 4) | /* expcnt */ |
| (vmcnt & 0xf) | |
| ((vmcnt >> 4) << 14); |
| |
| LLVMValueRef args[1] = { |
| LLVMConstInt(ctx->i32, simm16, false), |
| }; |
| ac_build_intrinsic(ctx, "llvm.amdgcn.s.waitcnt", |
| ctx->voidt, args, 1, 0); |
| } |
| |
| LLVMValueRef ac_build_fmed3(struct ac_llvm_context *ctx, LLVMValueRef src0, |
| LLVMValueRef src1, LLVMValueRef src2, |
| unsigned bitsize) |
| { |
| LLVMValueRef result; |
| |
| if (bitsize == 64 || (bitsize == 16 && ctx->chip_class <= GFX8)) { |
| /* Lower 64-bit fmed because LLVM doesn't expose an intrinsic, |
| * or lower 16-bit fmed because it's only supported on GFX9+. |
| */ |
| LLVMValueRef min1, min2, max1; |
| |
| min1 = ac_build_fmin(ctx, src0, src1); |
| max1 = ac_build_fmax(ctx, src0, src1); |
| min2 = ac_build_fmin(ctx, max1, src2); |
| |
| result = ac_build_fmax(ctx, min2, min1); |
| } else { |
| LLVMTypeRef type; |
| char *intr; |
| |
| if (bitsize == 16) { |
| intr = "llvm.amdgcn.fmed3.f16"; |
| type = ctx->f16; |
| } else { |
| assert(bitsize == 32); |
| intr = "llvm.amdgcn.fmed3.f32"; |
| type = ctx->f32; |
| } |
| |
| LLVMValueRef params[] = { |
| src0, |
| src1, |
| src2, |
| }; |
| |
| result = ac_build_intrinsic(ctx, intr, type, params, 3, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| if (ctx->chip_class < GFX9 && bitsize == 32) { |
| /* Only pre-GFX9 chips do not flush denorms. */ |
| result = ac_build_canonicalize(ctx, result, bitsize); |
| } |
| |
| return result; |
| } |
| |
| LLVMValueRef ac_build_fract(struct ac_llvm_context *ctx, LLVMValueRef src0, |
| unsigned bitsize) |
| { |
| LLVMTypeRef type; |
| char *intr; |
| |
| if (bitsize == 16) { |
| intr = "llvm.amdgcn.fract.f16"; |
| type = ctx->f16; |
| } else if (bitsize == 32) { |
| intr = "llvm.amdgcn.fract.f32"; |
| type = ctx->f32; |
| } else { |
| intr = "llvm.amdgcn.fract.f64"; |
| type = ctx->f64; |
| } |
| |
| LLVMValueRef params[] = { |
| src0, |
| }; |
| return ac_build_intrinsic(ctx, intr, type, params, 1, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| LLVMValueRef ac_build_isign(struct ac_llvm_context *ctx, LLVMValueRef src0, |
| unsigned bitsize) |
| { |
| LLVMTypeRef type = LLVMIntTypeInContext(ctx->context, bitsize); |
| LLVMValueRef zero = LLVMConstInt(type, 0, false); |
| LLVMValueRef one = LLVMConstInt(type, 1, false); |
| |
| LLVMValueRef cmp, val; |
| cmp = LLVMBuildICmp(ctx->builder, LLVMIntSGT, src0, zero, ""); |
| val = LLVMBuildSelect(ctx->builder, cmp, one, src0, ""); |
| cmp = LLVMBuildICmp(ctx->builder, LLVMIntSGE, val, zero, ""); |
| val = LLVMBuildSelect(ctx->builder, cmp, val, LLVMConstInt(type, -1, true), ""); |
| return val; |
| } |
| |
| LLVMValueRef ac_build_fsign(struct ac_llvm_context *ctx, LLVMValueRef src0, |
| unsigned bitsize) |
| { |
| LLVMValueRef cmp, val, zero, one; |
| LLVMTypeRef type; |
| |
| if (bitsize == 16) { |
| type = ctx->f16; |
| zero = ctx->f16_0; |
| one = ctx->f16_1; |
| } else if (bitsize == 32) { |
| type = ctx->f32; |
| zero = ctx->f32_0; |
| one = ctx->f32_1; |
| } else { |
| type = ctx->f64; |
| zero = ctx->f64_0; |
| one = ctx->f64_1; |
| } |
| |
| cmp = LLVMBuildFCmp(ctx->builder, LLVMRealOGT, src0, zero, ""); |
| val = LLVMBuildSelect(ctx->builder, cmp, one, src0, ""); |
| cmp = LLVMBuildFCmp(ctx->builder, LLVMRealOGE, val, zero, ""); |
| val = LLVMBuildSelect(ctx->builder, cmp, val, LLVMConstReal(type, -1.0), ""); |
| return val; |
| } |
| |
| LLVMValueRef ac_build_bit_count(struct ac_llvm_context *ctx, LLVMValueRef src0) |
| { |
| LLVMValueRef result; |
| unsigned bitsize; |
| |
| bitsize = ac_get_elem_bits(ctx, LLVMTypeOf(src0)); |
| |
| switch (bitsize) { |
| case 128: |
| result = ac_build_intrinsic(ctx, "llvm.ctpop.i128", ctx->i128, |
| (LLVMValueRef []) { src0 }, 1, |
| AC_FUNC_ATTR_READNONE); |
| result = LLVMBuildTrunc(ctx->builder, result, ctx->i32, ""); |
| break; |
| case 64: |
| result = ac_build_intrinsic(ctx, "llvm.ctpop.i64", ctx->i64, |
| (LLVMValueRef []) { src0 }, 1, |
| AC_FUNC_ATTR_READNONE); |
| |
| result = LLVMBuildTrunc(ctx->builder, result, ctx->i32, ""); |
| break; |
| case 32: |
| result = ac_build_intrinsic(ctx, "llvm.ctpop.i32", ctx->i32, |
| (LLVMValueRef []) { src0 }, 1, |
| AC_FUNC_ATTR_READNONE); |
| break; |
| case 16: |
| result = ac_build_intrinsic(ctx, "llvm.ctpop.i16", ctx->i16, |
| (LLVMValueRef []) { src0 }, 1, |
| AC_FUNC_ATTR_READNONE); |
| |
| result = LLVMBuildZExt(ctx->builder, result, ctx->i32, ""); |
| break; |
| case 8: |
| result = ac_build_intrinsic(ctx, "llvm.ctpop.i8", ctx->i8, |
| (LLVMValueRef []) { src0 }, 1, |
| AC_FUNC_ATTR_READNONE); |
| |
| result = LLVMBuildZExt(ctx->builder, result, ctx->i32, ""); |
| break; |
| default: |
| unreachable(!"invalid bitsize"); |
| break; |
| } |
| |
| return result; |
| } |
| |
| LLVMValueRef ac_build_bitfield_reverse(struct ac_llvm_context *ctx, |
| LLVMValueRef src0) |
| { |
| LLVMValueRef result; |
| unsigned bitsize; |
| |
| bitsize = ac_get_elem_bits(ctx, LLVMTypeOf(src0)); |
| |
| switch (bitsize) { |
| case 64: |
| result = ac_build_intrinsic(ctx, "llvm.bitreverse.i64", ctx->i64, |
| (LLVMValueRef []) { src0 }, 1, |
| AC_FUNC_ATTR_READNONE); |
| |
| result = LLVMBuildTrunc(ctx->builder, result, ctx->i32, ""); |
| break; |
| case 32: |
| result = ac_build_intrinsic(ctx, "llvm.bitreverse.i32", ctx->i32, |
| (LLVMValueRef []) { src0 }, 1, |
| AC_FUNC_ATTR_READNONE); |
| break; |
| case 16: |
| result = ac_build_intrinsic(ctx, "llvm.bitreverse.i16", ctx->i16, |
| (LLVMValueRef []) { src0 }, 1, |
| AC_FUNC_ATTR_READNONE); |
| |
| result = LLVMBuildZExt(ctx->builder, result, ctx->i32, ""); |
| break; |
| case 8: |
| result = ac_build_intrinsic(ctx, "llvm.bitreverse.i8", ctx->i8, |
| (LLVMValueRef []) { src0 }, 1, |
| AC_FUNC_ATTR_READNONE); |
| |
| result = LLVMBuildZExt(ctx->builder, result, ctx->i32, ""); |
| break; |
| default: |
| unreachable(!"invalid bitsize"); |
| break; |
| } |
| |
| return result; |
| } |
| |
| #define AC_EXP_TARGET 0 |
| #define AC_EXP_ENABLED_CHANNELS 1 |
| #define AC_EXP_OUT0 2 |
| |
| 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(struct ac_llvm_context *ctx, |
| 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]; |
| |
| /* Get current enabled channels mask. */ |
| LLVMValueRef arg = LLVMGetOperand(match->inst, AC_EXP_ENABLED_CHANNELS); |
| unsigned enabled_channels = LLVMConstIntGetZExtValue(arg); |
| |
| 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]; |
| |
| /* Update number of enabled channels because the original mask |
| * is not always 0xf. |
| */ |
| enabled_channels |= (1 << chan); |
| LLVMSetOperand(match->inst, AC_EXP_ENABLED_CHANNELS, |
| LLVMConstInt(ctx->i32, enabled_channels, 0)); |
| } |
| |
| /* 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, |
| uint32_t skip_output_mask, |
| 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 (!((1u << target) & skip_output_mask) && |
| (ac_eliminate_const_output(vs_output_param_offset, |
| num_outputs, &exp) || |
| ac_eliminate_duplicated_output(ctx, |
| 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 >= GFX7 ? 65536 : 32768; |
| ctx->lds = LLVMBuildIntToPtr(ctx->builder, ctx->i32_0, |
| LLVMPointerType(LLVMArrayType(ctx->i32, lds_size / 4), AC_ADDR_SPACE_LDS), |
| "lds"); |
| } |
| |
| LLVMValueRef ac_lds_load(struct ac_llvm_context *ctx, |
| LLVMValueRef dw_addr) |
| { |
| return LLVMBuildLoad(ctx->builder, ac_build_gep0(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) |
| { |
| unsigned src0_bitsize = ac_get_elem_bits(ctx, LLVMTypeOf(src0)); |
| const char *intrin_name; |
| LLVMTypeRef type; |
| LLVMValueRef zero; |
| |
| switch (src0_bitsize) { |
| case 64: |
| intrin_name = "llvm.cttz.i64"; |
| type = ctx->i64; |
| zero = ctx->i64_0; |
| break; |
| case 32: |
| intrin_name = "llvm.cttz.i32"; |
| type = ctx->i32; |
| zero = ctx->i32_0; |
| break; |
| case 16: |
| intrin_name = "llvm.cttz.i16"; |
| type = ctx->i16; |
| zero = ctx->i16_0; |
| break; |
| case 8: |
| intrin_name = "llvm.cttz.i8"; |
| type = ctx->i8; |
| zero = ctx->i8_0; |
| break; |
| default: |
| unreachable(!"invalid bitsize"); |
| } |
| |
| 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. |
| */ |
| ctx->i1true, |
| }; |
| |
| LLVMValueRef lsb = ac_build_intrinsic(ctx, intrin_name, type, |
| params, 2, |
| AC_FUNC_ATTR_READNONE); |
| |
| if (src0_bitsize == 64) { |
| lsb = LLVMBuildTrunc(ctx->builder, lsb, ctx->i32, ""); |
| } else if (src0_bitsize < 32) { |
| lsb = LLVMBuildSExt(ctx->builder, lsb, ctx->i32, ""); |
| } |
| |
| /* TODO: We need an intrinsic to skip this conditional. */ |
| /* Check for zero: */ |
| return LLVMBuildSelect(ctx->builder, LLVMBuildICmp(ctx->builder, |
| LLVMIntEQ, src0, |
| zero, ""), |
| LLVMConstInt(ctx->i32, -1, 0), lsb, ""); |
| } |
| |
| LLVMTypeRef ac_array_in_const_addr_space(LLVMTypeRef elem_type) |
| { |
| return LLVMPointerType(elem_type, AC_ADDR_SPACE_CONST); |
| } |
| |
| LLVMTypeRef ac_array_in_const32_addr_space(LLVMTypeRef elem_type) |
| { |
| return LLVMPointerType(elem_type, AC_ADDR_SPACE_CONST_32BIT); |
| } |
| |
| static struct ac_llvm_flow * |
| get_current_flow(struct ac_llvm_context *ctx) |
| { |
| if (ctx->flow->depth > 0) |
| return &ctx->flow->stack[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->stack[i - 1].loop_entry_block) |
| return &ctx->flow->stack[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->stack = realloc(ctx->flow->stack, new_max * sizeof(*ctx->flow->stack)); |
| ctx->flow->depth_max = new_max; |
| } |
| |
| flow = &ctx->flow->stack[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->stack[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--; |
| } |
| |
| void ac_build_ifcc(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, ""); |
| ac_build_ifcc(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, ""); |
| ac_build_ifcc(ctx, cond, label_id); |
| } |
| |
| LLVMValueRef ac_build_alloca_undef(struct ac_llvm_context *ac, LLVMTypeRef type, |
| const char *name) |
| { |
| LLVMBuilderRef builder = ac->builder; |
| LLVMBasicBlockRef current_block = LLVMGetInsertBlock(builder); |
| LLVMValueRef function = LLVMGetBasicBlockParent(current_block); |
| LLVMBasicBlockRef first_block = LLVMGetEntryBasicBlock(function); |
| LLVMValueRef first_instr = LLVMGetFirstInstruction(first_block); |
| LLVMBuilderRef first_builder = LLVMCreateBuilderInContext(ac->context); |
| LLVMValueRef res; |
| |
| if (first_instr) { |
| LLVMPositionBuilderBefore(first_builder, first_instr); |
| } else { |
| LLVMPositionBuilderAtEnd(first_builder, first_block); |
| } |
| |
| res = LLVMBuildAlloca(first_builder, type, name); |
| LLVMDisposeBuilder(first_builder); |
| return res; |
| } |
| |
| LLVMValueRef ac_build_alloca(struct ac_llvm_context *ac, |
| LLVMTypeRef type, const char *name) |
| { |
| LLVMValueRef ptr = ac_build_alloca_undef(ac, type, name); |
| LLVMBuildStore(ac->builder, LLVMConstNull(type), ptr); |
| return ptr; |
| } |
| |
| LLVMValueRef ac_cast_ptr(struct ac_llvm_context *ctx, LLVMValueRef ptr, |
| LLVMTypeRef type) |
| { |
| int addr_space = LLVMGetPointerAddressSpace(LLVMTypeOf(ptr)); |
| return LLVMBuildBitCast(ctx->builder, ptr, |
| LLVMPointerType(type, addr_space), ""); |
| } |
| |
| LLVMValueRef ac_trim_vector(struct ac_llvm_context *ctx, LLVMValueRef value, |
| unsigned count) |
| { |
| unsigned num_components = ac_get_llvm_num_components(value); |
| if (count == num_components) |
| return value; |
| |
| LLVMValueRef masks[MAX2(count, 2)]; |
| masks[0] = ctx->i32_0; |
| masks[1] = ctx->i32_1; |
| for (unsigned i = 2; i < count; i++) |
| masks[i] = LLVMConstInt(ctx->i32, i, false); |
| |
| if (count == 1) |
| return LLVMBuildExtractElement(ctx->builder, value, masks[0], |
| ""); |
| |
| LLVMValueRef swizzle = LLVMConstVector(masks, count); |
| return LLVMBuildShuffleVector(ctx->builder, value, value, swizzle, ""); |
| } |
| |
| LLVMValueRef ac_unpack_param(struct ac_llvm_context *ctx, LLVMValueRef param, |
| unsigned rshift, unsigned bitwidth) |
| { |
| LLVMValueRef value = param; |
| if (rshift) |
| value = LLVMBuildLShr(ctx->builder, value, |
| LLVMConstInt(ctx->i32, rshift, false), ""); |
| |
| if (rshift + bitwidth < 32) { |
| unsigned mask = (1 << bitwidth) - 1; |
| value = LLVMBuildAnd(ctx->builder, value, |
| LLVMConstInt(ctx->i32, mask, false), ""); |
| } |
| return value; |
| } |
| |
| /* Adjust the sample index according to FMASK. |
| * |
| * For uncompressed MSAA surfaces, FMASK should return 0x76543210, |
| * which is the identity mapping. Each nibble says which physical sample |
| * should be fetched to get that sample. |
| * |
| * For example, 0x11111100 means there are only 2 samples stored and |
| * the second sample covers 3/4 of the pixel. When reading samples 0 |
| * and 1, return physical sample 0 (determined by the first two 0s |
| * in FMASK), otherwise return physical sample 1. |
| * |
| * The sample index should be adjusted as follows: |
| * addr[sample_index] = (fmask >> (addr[sample_index] * 4)) & 0xF; |
| */ |
| void ac_apply_fmask_to_sample(struct ac_llvm_context *ac, LLVMValueRef fmask, |
| LLVMValueRef *addr, bool is_array_tex) |
| { |
| struct ac_image_args fmask_load = {}; |
| fmask_load.opcode = ac_image_load; |
| fmask_load.resource = fmask; |
| fmask_load.dmask = 0xf; |
| fmask_load.dim = is_array_tex ? ac_image_2darray : ac_image_2d; |
| fmask_load.attributes = AC_FUNC_ATTR_READNONE; |
| |
| fmask_load.coords[0] = addr[0]; |
| fmask_load.coords[1] = addr[1]; |
| if (is_array_tex) |
| fmask_load.coords[2] = addr[2]; |
| |
| LLVMValueRef fmask_value = ac_build_image_opcode(ac, &fmask_load); |
| fmask_value = LLVMBuildExtractElement(ac->builder, fmask_value, |
| ac->i32_0, ""); |
| |
| /* Apply the formula. */ |
| unsigned sample_chan = is_array_tex ? 3 : 2; |
| LLVMValueRef final_sample; |
| final_sample = LLVMBuildMul(ac->builder, addr[sample_chan], |
| LLVMConstInt(ac->i32, 4, 0), ""); |
| final_sample = LLVMBuildLShr(ac->builder, fmask_value, final_sample, ""); |
| /* Mask the sample index by 0x7, because 0x8 means an unknown value |
| * with EQAA, so those will map to 0. */ |
| final_sample = LLVMBuildAnd(ac->builder, final_sample, |
| LLVMConstInt(ac->i32, 0x7, 0), ""); |
| |
| /* Don't rewrite the sample index if WORD1.DATA_FORMAT of the FMASK |
| * resource descriptor is 0 (invalid). |
| */ |
| LLVMValueRef tmp; |
| tmp = LLVMBuildBitCast(ac->builder, fmask, ac->v8i32, ""); |
| tmp = LLVMBuildExtractElement(ac->builder, tmp, ac->i32_1, ""); |
| tmp = LLVMBuildICmp(ac->builder, LLVMIntNE, tmp, ac->i32_0, ""); |
| |
| /* Replace the MSAA sample index. */ |
| addr[sample_chan] = LLVMBuildSelect(ac->builder, tmp, final_sample, |
| addr[sample_chan], ""); |
| } |
| |
| static LLVMValueRef |
| _ac_build_readlane(struct ac_llvm_context *ctx, LLVMValueRef src, |
| LLVMValueRef lane, bool with_opt_barrier) |
| { |
| LLVMTypeRef type = LLVMTypeOf(src); |
| LLVMValueRef result; |
| |
| if (with_opt_barrier) |
| ac_build_optimization_barrier(ctx, &src); |
| |
| src = LLVMBuildZExt(ctx->builder, src, ctx->i32, ""); |
| if (lane) |
| lane = LLVMBuildZExt(ctx->builder, lane, ctx->i32, ""); |
| |
| result = ac_build_intrinsic(ctx, |
| lane == NULL ? "llvm.amdgcn.readfirstlane" : "llvm.amdgcn.readlane", |
| ctx->i32, (LLVMValueRef []) { src, lane }, |
| lane == NULL ? 1 : 2, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_CONVERGENT); |
| |
| return LLVMBuildTrunc(ctx->builder, result, type, ""); |
| } |
| |
| static LLVMValueRef |
| ac_build_readlane_common(struct ac_llvm_context *ctx, |
| LLVMValueRef src, LLVMValueRef lane, |
| bool with_opt_barrier) |
| { |
| LLVMTypeRef src_type = LLVMTypeOf(src); |
| src = ac_to_integer(ctx, src); |
| unsigned bits = LLVMGetIntTypeWidth(LLVMTypeOf(src)); |
| LLVMValueRef ret; |
| |
| if (bits > 32) { |
| assert(bits % 32 == 0); |
| LLVMTypeRef vec_type = LLVMVectorType(ctx->i32, bits / 32); |
| LLVMValueRef src_vector = |
| LLVMBuildBitCast(ctx->builder, src, vec_type, ""); |
| ret = LLVMGetUndef(vec_type); |
| for (unsigned i = 0; i < bits / 32; i++) { |
| LLVMValueRef ret_comp; |
| |
| src = LLVMBuildExtractElement(ctx->builder, src_vector, |
| LLVMConstInt(ctx->i32, i, 0), ""); |
| |
| ret_comp = _ac_build_readlane(ctx, src, lane, |
| with_opt_barrier); |
| |
| ret = LLVMBuildInsertElement(ctx->builder, ret, ret_comp, |
| LLVMConstInt(ctx->i32, i, 0), ""); |
| } |
| } else { |
| ret = _ac_build_readlane(ctx, src, lane, with_opt_barrier); |
| } |
| |
| if (LLVMGetTypeKind(src_type) == LLVMPointerTypeKind) |
| return LLVMBuildIntToPtr(ctx->builder, ret, src_type, ""); |
| return LLVMBuildBitCast(ctx->builder, ret, src_type, ""); |
| } |
| |
| /** |
| * Builds the "llvm.amdgcn.readlane" or "llvm.amdgcn.readfirstlane" intrinsic. |
| * |
| * The optimization barrier is not needed if the value is the same in all lanes |
| * or if this is called in the outermost block. |
| * |
| * @param ctx |
| * @param src |
| * @param lane - id of the lane or NULL for the first active lane |
| * @return value of the lane |
| */ |
| LLVMValueRef ac_build_readlane_no_opt_barrier(struct ac_llvm_context *ctx, |
| LLVMValueRef src, LLVMValueRef lane) |
| { |
| return ac_build_readlane_common(ctx, src, lane, false); |
| } |
| |
| |
| LLVMValueRef |
| ac_build_readlane(struct ac_llvm_context *ctx, LLVMValueRef src, LLVMValueRef lane) |
| { |
| return ac_build_readlane_common(ctx, src, lane, true); |
| } |
| |
| LLVMValueRef |
| ac_build_writelane(struct ac_llvm_context *ctx, LLVMValueRef src, LLVMValueRef value, LLVMValueRef lane) |
| { |
| return ac_build_intrinsic(ctx, "llvm.amdgcn.writelane", ctx->i32, |
| (LLVMValueRef []) {value, lane, src}, 3, |
| AC_FUNC_ATTR_READNONE | AC_FUNC_ATTR_CONVERGENT); |
| } |
| |
| LLVMValueRef |
| ac_build_mbcnt(struct ac_llvm_context *ctx, LLVMValueRef mask) |
| { |
| if (ctx->wave_size == 32) { |
| return ac_build_intrinsic(ctx, "llvm.amdgcn.mbcnt.lo", ctx->i32, |
| (LLVMValueRef []) { mask, ctx->i32_0 }, |
| 2, AC_FUNC_ATTR_READNONE); |
| } |
| LLVMValueRef mask_vec = LLVMBuildBitCast(ctx->builder, mask, ctx->v2i32, ""); |
| LLVMValueRef mask_lo = LLVMBuildExtractElement(ctx->builder, mask_vec, |
| ctx->i32_0, ""); |
| LLVMValueRef mask_hi = LLVMBuildExtractElement(ctx->builder, mask_vec, |
| ctx->i32_1, ""); |
| LLVMValueRef val = |
| ac_build_intrinsic(ctx, "llvm.amdgcn.mbcnt.lo", ctx->i32, |
| (LLVMValueRef []) { mask_lo, ctx->i32_0 }, |
| 2, AC_FUNC_ATTR_READNONE); |
| val = ac_build_intrinsic(ctx, "llvm.amdgcn.mbcnt.hi", ctx->i32, |
| (LLVMValueRef []) { mask_hi, val }, |
| 2, AC_FUNC_ATTR_READNONE); |
| return val; |
| } |
| |
| enum dpp_ctrl { |
| _dpp_quad_perm = 0x000, |
| _dpp_row_sl = 0x100, |
| _dpp_row_sr = 0x110, |
| _dpp_row_rr = 0x120, |
| dpp_wf_sl1 = 0x130, |
| dpp_wf_rl1 = 0x134, |
| dpp_wf_sr1 = 0x138, |
| dpp_wf_rr1 = 0x13C, |
| dpp_row_mirror = 0x140, |
| dpp_row_half_mirror = 0x141, |
| dpp_row_bcast15 = 0x142, |
| dpp_row_bcast31 = 0x143 |
| }; |
| |
| static inline enum dpp_ctrl |
| dpp_quad_perm(unsigned lane0, unsigned lane1, unsigned lane2, unsigned lane3) |
| { |
| assert(lane0 < 4 && lane1 < 4 && lane2 < 4 && lane3 < 4); |
| return _dpp_quad_perm | lane0 | (lane1 << 2) | (lane2 << 4) | (lane3 << 6); |
| } |
| |
| static inline enum dpp_ctrl |
| dpp_row_sl(unsigned amount) |
| { |
| assert(amount > 0 && amount < 16); |
| return _dpp_row_sl | amount; |
| } |
| |
| static inline enum dpp_ctrl |
| dpp_row_sr(unsigned amount) |
| { |
| assert(amount > 0 && amount < 16); |
| return _dpp_row_sr | amount; |
| } |
| |
| static LLVMValueRef |
| _ac_build_dpp(struct ac_llvm_context *ctx, LLVMValueRef old, LLVMValueRef src, |
| enum dpp_ctrl dpp_ctrl, unsigned row_mask, unsigned bank_mask, |
| bool bound_ctrl) |
| { |
| LLVMTypeRef type = LLVMTypeOf(src); |
| LLVMValueRef res; |
| |
| old = LLVMBuildZExt(ctx->builder, old, ctx->i32, ""); |
| src = LLVMBuildZExt(ctx->builder, src, ctx->i32, ""); |
| |
| res = ac_build_intrinsic(ctx, "llvm.amdgcn.update.dpp.i32", ctx->i32, |
| (LLVMValueRef[]) { |
| old, src, |
| LLVMConstInt(ctx->i32, dpp_ctrl, 0), |
| LLVMConstInt(ctx->i32, row_mask, 0), |
| LLVMConstInt(ctx->i32, bank_mask, 0), |
| LLVMConstInt(ctx->i1, bound_ctrl, 0) }, |
| 6, AC_FUNC_ATTR_READNONE | AC_FUNC_ATTR_CONVERGENT); |
| |
| return LLVMBuildTrunc(ctx->builder, res, type, ""); |
| } |
| |
| static LLVMValueRef |
| ac_build_dpp(struct ac_llvm_context *ctx, LLVMValueRef old, LLVMValueRef src, |
| enum dpp_ctrl dpp_ctrl, unsigned row_mask, unsigned bank_mask, |
| bool bound_ctrl) |
| { |
| LLVMTypeRef src_type = LLVMTypeOf(src); |
| src = ac_to_integer(ctx, src); |
| old = ac_to_integer(ctx, old); |
| unsigned bits = LLVMGetIntTypeWidth(LLVMTypeOf(src)); |
| LLVMValueRef ret; |
| if (bits > 32) { |
| assert(bits % 32 == 0); |
| LLVMTypeRef vec_type = LLVMVectorType(ctx->i32, bits / 32); |
| LLVMValueRef src_vector = |
| LLVMBuildBitCast(ctx->builder, src, vec_type, ""); |
| LLVMValueRef old_vector = |
| LLVMBuildBitCast(ctx->builder, old, vec_type, ""); |
| ret = LLVMGetUndef(vec_type); |
| for (unsigned i = 0; i < bits / 32; i++) { |
| src = LLVMBuildExtractElement(ctx->builder, src_vector, |
| LLVMConstInt(ctx->i32, i, |
| 0), ""); |
| old = LLVMBuildExtractElement(ctx->builder, old_vector, |
| LLVMConstInt(ctx->i32, i, |
| 0), ""); |
| LLVMValueRef ret_comp = _ac_build_dpp(ctx, old, src, |
| dpp_ctrl, |
| row_mask, |
| bank_mask, |
| bound_ctrl); |
| ret = LLVMBuildInsertElement(ctx->builder, ret, |
| ret_comp, |
| LLVMConstInt(ctx->i32, i, |
| 0), ""); |
| } |
| } else { |
| ret = _ac_build_dpp(ctx, old, src, dpp_ctrl, row_mask, |
| bank_mask, bound_ctrl); |
| } |
| return LLVMBuildBitCast(ctx->builder, ret, src_type, ""); |
| } |
| |
| static LLVMValueRef |
| _ac_build_permlane16(struct ac_llvm_context *ctx, LLVMValueRef src, uint64_t sel, |
| bool exchange_rows, bool bound_ctrl) |
| { |
| LLVMTypeRef type = LLVMTypeOf(src); |
| LLVMValueRef result; |
| |
| src = LLVMBuildZExt(ctx->builder, src, ctx->i32, ""); |
| |
| LLVMValueRef args[6] = { |
| src, |
| src, |
| LLVMConstInt(ctx->i32, sel, false), |
| LLVMConstInt(ctx->i32, sel >> 32, false), |
| ctx->i1true, /* fi */ |
| bound_ctrl ? ctx->i1true : ctx->i1false, |
| }; |
| |
| result = ac_build_intrinsic(ctx, exchange_rows ? "llvm.amdgcn.permlanex16" |
| : "llvm.amdgcn.permlane16", |
| ctx->i32, args, 6, |
| AC_FUNC_ATTR_READNONE | AC_FUNC_ATTR_CONVERGENT); |
| |
| return LLVMBuildTrunc(ctx->builder, result, type, ""); |
| } |
| |
| static LLVMValueRef |
| ac_build_permlane16(struct ac_llvm_context *ctx, LLVMValueRef src, uint64_t sel, |
| bool exchange_rows, bool bound_ctrl) |
| { |
| LLVMTypeRef src_type = LLVMTypeOf(src); |
| src = ac_to_integer(ctx, src); |
| unsigned bits = LLVMGetIntTypeWidth(LLVMTypeOf(src)); |
| LLVMValueRef ret; |
| if (bits > 32) { |
| assert(bits % 32 == 0); |
| LLVMTypeRef vec_type = LLVMVectorType(ctx->i32, bits / 32); |
| LLVMValueRef src_vector = |
| LLVMBuildBitCast(ctx->builder, src, vec_type, ""); |
| ret = LLVMGetUndef(vec_type); |
| for (unsigned i = 0; i < bits / 32; i++) { |
| src = LLVMBuildExtractElement(ctx->builder, src_vector, |
| LLVMConstInt(ctx->i32, i, |
| 0), ""); |
| LLVMValueRef ret_comp = |
| _ac_build_permlane16(ctx, src, sel, |
| exchange_rows, |
| bound_ctrl); |
| ret = LLVMBuildInsertElement(ctx->builder, ret, |
| ret_comp, |
| LLVMConstInt(ctx->i32, i, |
| 0), ""); |
| } |
| } else { |
| ret = _ac_build_permlane16(ctx, src, sel, exchange_rows, |
| bound_ctrl); |
| } |
| return LLVMBuildBitCast(ctx->builder, ret, src_type, ""); |
| } |
| |
| static inline unsigned |
| ds_pattern_bitmode(unsigned and_mask, unsigned or_mask, unsigned xor_mask) |
| { |
| assert(and_mask < 32 && or_mask < 32 && xor_mask < 32); |
| return and_mask | (or_mask << 5) | (xor_mask << 10); |
| } |
| |
| static LLVMValueRef |
| _ac_build_ds_swizzle(struct ac_llvm_context *ctx, LLVMValueRef src, unsigned mask) |
| { |
| LLVMTypeRef src_type = LLVMTypeOf(src); |
| LLVMValueRef ret; |
| |
| src = LLVMBuildZExt(ctx->builder, src, ctx->i32, ""); |
| |
| ret = ac_build_intrinsic(ctx, "llvm.amdgcn.ds.swizzle", ctx->i32, |
| (LLVMValueRef []) { |
| src, LLVMConstInt(ctx->i32, mask, 0) }, |
| 2, AC_FUNC_ATTR_READNONE | AC_FUNC_ATTR_CONVERGENT); |
| |
| return LLVMBuildTrunc(ctx->builder, ret, src_type, ""); |
| } |
| |
| LLVMValueRef |
| ac_build_ds_swizzle(struct ac_llvm_context *ctx, LLVMValueRef src, unsigned mask) |
| { |
| LLVMTypeRef src_type = LLVMTypeOf(src); |
| src = ac_to_integer(ctx, src); |
| unsigned bits = LLVMGetIntTypeWidth(LLVMTypeOf(src)); |
| LLVMValueRef ret; |
| if (bits > 32) { |
| assert(bits % 32 == 0); |
| LLVMTypeRef vec_type = LLVMVectorType(ctx->i32, bits / 32); |
| LLVMValueRef src_vector = |
| LLVMBuildBitCast(ctx->builder, src, vec_type, ""); |
| ret = LLVMGetUndef(vec_type); |
| for (unsigned i = 0; i < bits / 32; i++) { |
| src = LLVMBuildExtractElement(ctx->builder, src_vector, |
| LLVMConstInt(ctx->i32, i, |
| 0), ""); |
| LLVMValueRef ret_comp = _ac_build_ds_swizzle(ctx, src, |
| mask); |
| ret = LLVMBuildInsertElement(ctx->builder, ret, |
| ret_comp, |
| LLVMConstInt(ctx->i32, i, |
| 0), ""); |
| } |
| } else { |
| ret = _ac_build_ds_swizzle(ctx, src, mask); |
| } |
| return LLVMBuildBitCast(ctx->builder, ret, src_type, ""); |
| } |
| |
| static LLVMValueRef |
| ac_build_wwm(struct ac_llvm_context *ctx, LLVMValueRef src) |
| { |
| LLVMTypeRef src_type = LLVMTypeOf(src); |
| unsigned bitsize = ac_get_elem_bits(ctx, src_type); |
| char name[32], type[8]; |
| LLVMValueRef ret; |
| |
| src = ac_to_integer(ctx, src); |
| |
| if (bitsize < 32) |
| src = LLVMBuildZExt(ctx->builder, src, ctx->i32, ""); |
| |
| ac_build_type_name_for_intr(LLVMTypeOf(src), type, sizeof(type)); |
| snprintf(name, sizeof(name), "llvm.amdgcn.wwm.%s", type); |
| ret = ac_build_intrinsic(ctx, name, LLVMTypeOf(src), |
| (LLVMValueRef []) { src }, 1, |
| AC_FUNC_ATTR_READNONE); |
| |
| if (bitsize < 32) |
| ret = LLVMBuildTrunc(ctx->builder, ret, |
| ac_to_integer_type(ctx, src_type), ""); |
| |
| return LLVMBuildBitCast(ctx->builder, ret, src_type, ""); |
| } |
| |
| static LLVMValueRef |
| ac_build_set_inactive(struct ac_llvm_context *ctx, LLVMValueRef src, |
| LLVMValueRef inactive) |
| { |
| char name[33], type[8]; |
| LLVMTypeRef src_type = LLVMTypeOf(src); |
| unsigned bitsize = ac_get_elem_bits(ctx, src_type); |
| src = ac_to_integer(ctx, src); |
| inactive = ac_to_integer(ctx, inactive); |
| |
| if (bitsize < 32) { |
| src = LLVMBuildZExt(ctx->builder, src, ctx->i32, ""); |
| inactive = LLVMBuildZExt(ctx->builder, inactive, ctx->i32, ""); |
| } |
| |
| ac_build_type_name_for_intr(LLVMTypeOf(src), type, sizeof(type)); |
| snprintf(name, sizeof(name), "llvm.amdgcn.set.inactive.%s", type); |
| LLVMValueRef ret = |
| ac_build_intrinsic(ctx, name, |
| LLVMTypeOf(src), (LLVMValueRef []) { |
| src, inactive }, 2, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_CONVERGENT); |
| if (bitsize < 32) |
| ret = LLVMBuildTrunc(ctx->builder, ret, src_type, ""); |
| |
| return ret; |
| } |
| |
| static LLVMValueRef |
| get_reduction_identity(struct ac_llvm_context *ctx, nir_op op, unsigned type_size) |
| { |
| if (type_size == 1) { |
| switch (op) { |
| case nir_op_iadd: return ctx->i8_0; |
| case nir_op_imul: return ctx->i8_1; |
| case nir_op_imin: return LLVMConstInt(ctx->i8, INT8_MAX, 0); |
| case nir_op_umin: return LLVMConstInt(ctx->i8, UINT8_MAX, 0); |
| case nir_op_imax: return LLVMConstInt(ctx->i8, INT8_MIN, 0); |
| case nir_op_umax: return ctx->i8_0; |
| case nir_op_iand: return LLVMConstInt(ctx->i8, -1, 0); |
| case nir_op_ior: return ctx->i8_0; |
| case nir_op_ixor: return ctx->i8_0; |
| default: |
| unreachable("bad reduction intrinsic"); |
| } |
| } else if (type_size == 2) { |
| switch (op) { |
| case nir_op_iadd: return ctx->i16_0; |
| case nir_op_fadd: return ctx->f16_0; |
| case nir_op_imul: return ctx->i16_1; |
| case nir_op_fmul: return ctx->f16_1; |
| case nir_op_imin: return LLVMConstInt(ctx->i16, INT16_MAX, 0); |
| case nir_op_umin: return LLVMConstInt(ctx->i16, UINT16_MAX, 0); |
| case nir_op_fmin: return LLVMConstReal(ctx->f16, INFINITY); |
| case nir_op_imax: return LLVMConstInt(ctx->i16, INT16_MIN, 0); |
| case nir_op_umax: return ctx->i16_0; |
| case nir_op_fmax: return LLVMConstReal(ctx->f16, -INFINITY); |
| case nir_op_iand: return LLVMConstInt(ctx->i16, -1, 0); |
| case nir_op_ior: return ctx->i16_0; |
| case nir_op_ixor: return ctx->i16_0; |
| default: |
| unreachable("bad reduction intrinsic"); |
| } |
| } else if (type_size == 4) { |
| switch (op) { |
| case nir_op_iadd: return ctx->i32_0; |
| case nir_op_fadd: return ctx->f32_0; |
| case nir_op_imul: return ctx->i32_1; |
| case nir_op_fmul: return ctx->f32_1; |
| case nir_op_imin: return LLVMConstInt(ctx->i32, INT32_MAX, 0); |
| case nir_op_umin: return LLVMConstInt(ctx->i32, UINT32_MAX, 0); |
| case nir_op_fmin: return LLVMConstReal(ctx->f32, INFINITY); |
| case nir_op_imax: return LLVMConstInt(ctx->i32, INT32_MIN, 0); |
| case nir_op_umax: return ctx->i32_0; |
| case nir_op_fmax: return LLVMConstReal(ctx->f32, -INFINITY); |
| case nir_op_iand: return LLVMConstInt(ctx->i32, -1, 0); |
| case nir_op_ior: return ctx->i32_0; |
| case nir_op_ixor: return ctx->i32_0; |
| default: |
| unreachable("bad reduction intrinsic"); |
| } |
| } else { /* type_size == 64bit */ |
| switch (op) { |
| case nir_op_iadd: return ctx->i64_0; |
| case nir_op_fadd: return ctx->f64_0; |
| case nir_op_imul: return ctx->i64_1; |
| case nir_op_fmul: return ctx->f64_1; |
| case nir_op_imin: return LLVMConstInt(ctx->i64, INT64_MAX, 0); |
| case nir_op_umin: return LLVMConstInt(ctx->i64, UINT64_MAX, 0); |
| case nir_op_fmin: return LLVMConstReal(ctx->f64, INFINITY); |
| case nir_op_imax: return LLVMConstInt(ctx->i64, INT64_MIN, 0); |
| case nir_op_umax: return ctx->i64_0; |
| case nir_op_fmax: return LLVMConstReal(ctx->f64, -INFINITY); |
| case nir_op_iand: return LLVMConstInt(ctx->i64, -1, 0); |
| case nir_op_ior: return ctx->i64_0; |
| case nir_op_ixor: return ctx->i64_0; |
| default: |
| unreachable("bad reduction intrinsic"); |
| } |
| } |
| } |
| |
| static LLVMValueRef |
| ac_build_alu_op(struct ac_llvm_context *ctx, LLVMValueRef lhs, LLVMValueRef rhs, nir_op op) |
| { |
| bool _64bit = ac_get_type_size(LLVMTypeOf(lhs)) == 8; |
| bool _32bit = ac_get_type_size(LLVMTypeOf(lhs)) == 4; |
| switch (op) { |
| case nir_op_iadd: return LLVMBuildAdd(ctx->builder, lhs, rhs, ""); |
| case nir_op_fadd: return LLVMBuildFAdd(ctx->builder, lhs, rhs, ""); |
| case nir_op_imul: return LLVMBuildMul(ctx->builder, lhs, rhs, ""); |
| case nir_op_fmul: return LLVMBuildFMul(ctx->builder, lhs, rhs, ""); |
| case nir_op_imin: return LLVMBuildSelect(ctx->builder, |
| LLVMBuildICmp(ctx->builder, LLVMIntSLT, lhs, rhs, ""), |
| lhs, rhs, ""); |
| case nir_op_umin: return LLVMBuildSelect(ctx->builder, |
| LLVMBuildICmp(ctx->builder, LLVMIntULT, lhs, rhs, ""), |
| lhs, rhs, ""); |
| case nir_op_fmin: return ac_build_intrinsic(ctx, |
| _64bit ? "llvm.minnum.f64" : _32bit ? "llvm.minnum.f32" : "llvm.minnum.f16", |
| _64bit ? ctx->f64 : _32bit ? ctx->f32 : ctx->f16, |
| (LLVMValueRef[]){lhs, rhs}, 2, AC_FUNC_ATTR_READNONE); |
| case nir_op_imax: return LLVMBuildSelect(ctx->builder, |
| LLVMBuildICmp(ctx->builder, LLVMIntSGT, lhs, rhs, ""), |
| lhs, rhs, ""); |
| case nir_op_umax: return LLVMBuildSelect(ctx->builder, |
| LLVMBuildICmp(ctx->builder, LLVMIntUGT, lhs, rhs, ""), |
| lhs, rhs, ""); |
| case nir_op_fmax: return ac_build_intrinsic(ctx, |
| _64bit ? "llvm.maxnum.f64" : _32bit ? "llvm.maxnum.f32" : "llvm.maxnum.f16", |
| _64bit ? ctx->f64 : _32bit ? ctx->f32 : ctx->f16, |
| (LLVMValueRef[]){lhs, rhs}, 2, AC_FUNC_ATTR_READNONE); |
| case nir_op_iand: return LLVMBuildAnd(ctx->builder, lhs, rhs, ""); |
| case nir_op_ior: return LLVMBuildOr(ctx->builder, lhs, rhs, ""); |
| case nir_op_ixor: return LLVMBuildXor(ctx->builder, lhs, rhs, ""); |
| default: |
| unreachable("bad reduction intrinsic"); |
| } |
| } |
| |
| /** |
| * \param src The value to shift. |
| * \param identity The value to use the first lane. |
| * \param maxprefix specifies that the result only needs to be correct for a |
| * prefix of this many threads |
| * \return src, shifted 1 lane up, and identity shifted into lane 0. |
| */ |
| static LLVMValueRef |
| ac_wavefront_shift_right_1(struct ac_llvm_context *ctx, LLVMValueRef src, |
| LLVMValueRef identity, unsigned maxprefix) |
| { |
| if (ctx->chip_class >= GFX10) { |
| /* wavefront shift_right by 1 on GFX10 (emulate dpp_wf_sr1) */ |
| LLVMValueRef active, tmp1, tmp2; |
| LLVMValueRef tid = ac_get_thread_id(ctx); |
| |
| tmp1 = ac_build_dpp(ctx, identity, src, dpp_row_sr(1), 0xf, 0xf, false); |
| |
| tmp2 = ac_build_permlane16(ctx, src, (uint64_t)~0, true, false); |
| |
| if (maxprefix > 32) { |
| active = LLVMBuildICmp(ctx->builder, LLVMIntEQ, tid, |
| LLVMConstInt(ctx->i32, 32, false), ""); |
| |
| tmp2 = LLVMBuildSelect(ctx->builder, active, |
| ac_build_readlane(ctx, src, |
| LLVMConstInt(ctx->i32, 31, false)), |
| tmp2, ""); |
| |
| active = LLVMBuildOr(ctx->builder, active, |
| LLVMBuildICmp(ctx->builder, LLVMIntEQ, |
| LLVMBuildAnd(ctx->builder, tid, |
| LLVMConstInt(ctx->i32, 0x1f, false), ""), |
| LLVMConstInt(ctx->i32, 0x10, false), ""), ""); |
| return LLVMBuildSelect(ctx->builder, active, tmp2, tmp1, ""); |
| } else if (maxprefix > 16) { |
| active = LLVMBuildICmp(ctx->builder, LLVMIntEQ, tid, |
| LLVMConstInt(ctx->i32, 16, false), ""); |
| |
| return LLVMBuildSelect(ctx->builder, active, tmp2, tmp1, ""); |
| } |
| } else if (ctx->chip_class >= GFX8) { |
| return ac_build_dpp(ctx, identity, src, dpp_wf_sr1, 0xf, 0xf, false); |
| } |
| |
| /* wavefront shift_right by 1 on SI/CI */ |
| LLVMValueRef active, tmp1, tmp2; |
| LLVMValueRef tid = ac_get_thread_id(ctx); |
| tmp1 = ac_build_ds_swizzle(ctx, src, (1 << 15) | dpp_quad_perm(0, 0, 1, 2)); |
| tmp2 = ac_build_ds_swizzle(ctx, src, ds_pattern_bitmode(0x18, 0x03, 0x00)); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntEQ, |
| LLVMBuildAnd(ctx->builder, tid, LLVMConstInt(ctx->i32, 0x7, 0), ""), |
| LLVMConstInt(ctx->i32, 0x4, 0), ""); |
| tmp1 = LLVMBuildSelect(ctx->builder, active, tmp2, tmp1, ""); |
| tmp2 = ac_build_ds_swizzle(ctx, src, ds_pattern_bitmode(0x10, 0x07, 0x00)); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntEQ, |
| LLVMBuildAnd(ctx->builder, tid, LLVMConstInt(ctx->i32, 0xf, 0), ""), |
| LLVMConstInt(ctx->i32, 0x8, 0), ""); |
| tmp1 = LLVMBuildSelect(ctx->builder, active, tmp2, tmp1, ""); |
| tmp2 = ac_build_ds_swizzle(ctx, src, ds_pattern_bitmode(0x00, 0x0f, 0x00)); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntEQ, |
| LLVMBuildAnd(ctx->builder, tid, LLVMConstInt(ctx->i32, 0x1f, 0), ""), |
| LLVMConstInt(ctx->i32, 0x10, 0), ""); |
| tmp1 = LLVMBuildSelect(ctx->builder, active, tmp2, tmp1, ""); |
| tmp2 = ac_build_readlane(ctx, src, LLVMConstInt(ctx->i32, 31, 0)); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntEQ, tid, LLVMConstInt(ctx->i32, 32, 0), ""); |
| tmp1 = LLVMBuildSelect(ctx->builder, active, tmp2, tmp1, ""); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntEQ, tid, LLVMConstInt(ctx->i32, 0, 0), ""); |
| return LLVMBuildSelect(ctx->builder, active, identity, tmp1, ""); |
| } |
| |
| /** |
| * \param maxprefix specifies that the result only needs to be correct for a |
| * prefix of this many threads |
| */ |
| static LLVMValueRef |
| ac_build_scan(struct ac_llvm_context *ctx, nir_op op, LLVMValueRef src, LLVMValueRef identity, |
| unsigned maxprefix, bool inclusive) |
| { |
| LLVMValueRef result, tmp; |
| |
| if (!inclusive) |
| src = ac_wavefront_shift_right_1(ctx, src, identity, maxprefix); |
| |
| result = src; |
| |
| if (ctx->chip_class <= GFX7) { |
| assert(maxprefix == 64); |
| LLVMValueRef tid = ac_get_thread_id(ctx); |
| LLVMValueRef active; |
| tmp = ac_build_ds_swizzle(ctx, src, ds_pattern_bitmode(0x1e, 0x00, 0x00)); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntNE, |
| LLVMBuildAnd(ctx->builder, tid, ctx->i32_1, ""), |
| ctx->i32_0, ""); |
| tmp = LLVMBuildSelect(ctx->builder, active, tmp, identity, ""); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| tmp = ac_build_ds_swizzle(ctx, result, ds_pattern_bitmode(0x1c, 0x01, 0x00)); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntNE, |
| LLVMBuildAnd(ctx->builder, tid, LLVMConstInt(ctx->i32, 2, 0), ""), |
| ctx->i32_0, ""); |
| tmp = LLVMBuildSelect(ctx->builder, active, tmp, identity, ""); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| tmp = ac_build_ds_swizzle(ctx, result, ds_pattern_bitmode(0x18, 0x03, 0x00)); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntNE, |
| LLVMBuildAnd(ctx->builder, tid, LLVMConstInt(ctx->i32, 4, 0), ""), |
| ctx->i32_0, ""); |
| tmp = LLVMBuildSelect(ctx->builder, active, tmp, identity, ""); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| tmp = ac_build_ds_swizzle(ctx, result, ds_pattern_bitmode(0x10, 0x07, 0x00)); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntNE, |
| LLVMBuildAnd(ctx->builder, tid, LLVMConstInt(ctx->i32, 8, 0), ""), |
| ctx->i32_0, ""); |
| tmp = LLVMBuildSelect(ctx->builder, active, tmp, identity, ""); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| tmp = ac_build_ds_swizzle(ctx, result, ds_pattern_bitmode(0x00, 0x0f, 0x00)); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntNE, |
| LLVMBuildAnd(ctx->builder, tid, LLVMConstInt(ctx->i32, 16, 0), ""), |
| ctx->i32_0, ""); |
| tmp = LLVMBuildSelect(ctx->builder, active, tmp, identity, ""); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| tmp = ac_build_readlane(ctx, result, LLVMConstInt(ctx->i32, 31, 0)); |
| active = LLVMBuildICmp(ctx->builder, LLVMIntNE, |
| LLVMBuildAnd(ctx->builder, tid, LLVMConstInt(ctx->i32, 32, 0), ""), |
| ctx->i32_0, ""); |
| tmp = LLVMBuildSelect(ctx->builder, active, tmp, identity, ""); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| return result; |
| } |
| |
| if (maxprefix <= 1) |
| return result; |
| tmp = ac_build_dpp(ctx, identity, src, dpp_row_sr(1), 0xf, 0xf, false); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| if (maxprefix <= 2) |
| return result; |
| tmp = ac_build_dpp(ctx, identity, src, dpp_row_sr(2), 0xf, 0xf, false); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| if (maxprefix <= 3) |
| return result; |
| tmp = ac_build_dpp(ctx, identity, src, dpp_row_sr(3), 0xf, 0xf, false); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| if (maxprefix <= 4) |
| return result; |
| tmp = ac_build_dpp(ctx, identity, result, dpp_row_sr(4), 0xf, 0xe, false); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| if (maxprefix <= 8) |
| return result; |
| tmp = ac_build_dpp(ctx, identity, result, dpp_row_sr(8), 0xf, 0xc, false); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| if (maxprefix <= 16) |
| return result; |
| |
| if (ctx->chip_class >= GFX10) { |
| LLVMValueRef tid = ac_get_thread_id(ctx); |
| LLVMValueRef active; |
| |
| tmp = ac_build_permlane16(ctx, result, ~(uint64_t)0, true, false); |
| |
| active = LLVMBuildICmp(ctx->builder, LLVMIntNE, |
| LLVMBuildAnd(ctx->builder, tid, |
| LLVMConstInt(ctx->i32, 16, false), ""), |
| ctx->i32_0, ""); |
| |
| tmp = LLVMBuildSelect(ctx->builder, active, tmp, identity, ""); |
| |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| |
| if (maxprefix <= 32) |
| return result; |
| |
| tmp = ac_build_readlane(ctx, result, LLVMConstInt(ctx->i32, 31, false)); |
| |
| active = LLVMBuildICmp(ctx->builder, LLVMIntUGE, tid, |
| LLVMConstInt(ctx->i32, 32, false), ""); |
| |
| tmp = LLVMBuildSelect(ctx->builder, active, tmp, identity, ""); |
| |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| return result; |
| } |
| |
| tmp = ac_build_dpp(ctx, identity, result, dpp_row_bcast15, 0xa, 0xf, false); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| if (maxprefix <= 32) |
| return result; |
| tmp = ac_build_dpp(ctx, identity, result, dpp_row_bcast31, 0xc, 0xf, false); |
| result = ac_build_alu_op(ctx, result, tmp, op); |
| return result; |
| } |
| |
| LLVMValueRef |
| ac_build_inclusive_scan(struct ac_llvm_context *ctx, LLVMValueRef src, nir_op op) |
| { |
| LLVMValueRef result; |
| |
| if (LLVMTypeOf(src) == ctx->i1 && op == nir_op_iadd) { |
| LLVMBuilderRef builder = ctx->builder; |
| src = LLVMBuildZExt(builder, src, ctx->i32, ""); |
| result = ac_build_ballot(ctx, src); |
| result = ac_build_mbcnt(ctx, result); |
| result = LLVMBuildAdd(builder, result, src, ""); |
| return result; |
| } |
| |
| ac_build_optimization_barrier(ctx, &src); |
| |
| LLVMValueRef identity = |
| get_reduction_identity(ctx, op, ac_get_type_size(LLVMTypeOf(src))); |
| result = LLVMBuildBitCast(ctx->builder, ac_build_set_inactive(ctx, src, identity), |
| LLVMTypeOf(identity), ""); |
| result = ac_build_scan(ctx, op, result, identity, ctx->wave_size, true); |
| |
| return ac_build_wwm(ctx, result); |
| } |
| |
| LLVMValueRef |
| ac_build_exclusive_scan(struct ac_llvm_context *ctx, LLVMValueRef src, nir_op op) |
| { |
| LLVMValueRef result; |
| |
| if (LLVMTypeOf(src) == ctx->i1 && op == nir_op_iadd) { |
| LLVMBuilderRef builder = ctx->builder; |
| src = LLVMBuildZExt(builder, src, ctx->i32, ""); |
| result = ac_build_ballot(ctx, src); |
| result = ac_build_mbcnt(ctx, result); |
| return result; |
| } |
| |
| ac_build_optimization_barrier(ctx, &src); |
| |
| LLVMValueRef identity = |
| get_reduction_identity(ctx, op, ac_get_type_size(LLVMTypeOf(src))); |
| result = LLVMBuildBitCast(ctx->builder, ac_build_set_inactive(ctx, src, identity), |
| LLVMTypeOf(identity), ""); |
| result = ac_build_scan(ctx, op, result, identity, ctx->wave_size, false); |
| |
| return ac_build_wwm(ctx, result); |
| } |
| |
| LLVMValueRef |
| ac_build_reduce(struct ac_llvm_context *ctx, LLVMValueRef src, nir_op op, unsigned cluster_size) |
| { |
| if (cluster_size == 1) return src; |
| ac_build_optimization_barrier(ctx, &src); |
| LLVMValueRef result, swap; |
| LLVMValueRef identity = get_reduction_identity(ctx, op, |
| ac_get_type_size(LLVMTypeOf(src))); |
| result = LLVMBuildBitCast(ctx->builder, |
| ac_build_set_inactive(ctx, src, identity), |
| LLVMTypeOf(identity), ""); |
| swap = ac_build_quad_swizzle(ctx, result, 1, 0, 3, 2); |
| result = ac_build_alu_op(ctx, result, swap, op); |
| if (cluster_size == 2) return ac_build_wwm(ctx, result); |
| |
| swap = ac_build_quad_swizzle(ctx, result, 2, 3, 0, 1); |
| result = ac_build_alu_op(ctx, result, swap, op); |
| if (cluster_size == 4) return ac_build_wwm(ctx, result); |
| |
| if (ctx->chip_class >= GFX8) |
| swap = ac_build_dpp(ctx, identity, result, dpp_row_half_mirror, 0xf, 0xf, false); |
| else |
| swap = ac_build_ds_swizzle(ctx, result, ds_pattern_bitmode(0x1f, 0, 0x04)); |
| result = ac_build_alu_op(ctx, result, swap, op); |
| if (cluster_size == 8) return ac_build_wwm(ctx, result); |
| |
| if (ctx->chip_class >= GFX8) |
| swap = ac_build_dpp(ctx, identity, result, dpp_row_mirror, 0xf, 0xf, false); |
| else |
| swap = ac_build_ds_swizzle(ctx, result, ds_pattern_bitmode(0x1f, 0, 0x08)); |
| result = ac_build_alu_op(ctx, result, swap, op); |
| if (cluster_size == 16) return ac_build_wwm(ctx, result); |
| |
| if (ctx->chip_class >= GFX10) |
| swap = ac_build_permlane16(ctx, result, 0, true, false); |
| else if (ctx->chip_class >= GFX8 && cluster_size != 32) |
| swap = ac_build_dpp(ctx, identity, result, dpp_row_bcast15, 0xa, 0xf, false); |
| else |
| swap = ac_build_ds_swizzle(ctx, result, ds_pattern_bitmode(0x1f, 0, 0x10)); |
| result = ac_build_alu_op(ctx, result, swap, op); |
| if (cluster_size == 32) return ac_build_wwm(ctx, result); |
| |
| if (ctx->chip_class >= GFX8) { |
| if (ctx->wave_size == 64) { |
| if (ctx->chip_class >= GFX10) |
| swap = ac_build_readlane(ctx, result, LLVMConstInt(ctx->i32, 31, false)); |
| else |
| swap = ac_build_dpp(ctx, identity, result, dpp_row_bcast31, 0xc, 0xf, false); |
| result = ac_build_alu_op(ctx, result, swap, op); |
| result = ac_build_readlane(ctx, result, LLVMConstInt(ctx->i32, 63, 0)); |
| } |
| |
| return ac_build_wwm(ctx, result); |
| } else { |
| swap = ac_build_readlane(ctx, result, ctx->i32_0); |
| result = ac_build_readlane(ctx, result, LLVMConstInt(ctx->i32, 32, 0)); |
| result = ac_build_alu_op(ctx, result, swap, op); |
| return ac_build_wwm(ctx, result); |
| } |
| } |
| |
| /** |
| * "Top half" of a scan that reduces per-wave values across an entire |
| * workgroup. |
| * |
| * The source value must be present in the highest lane of the wave, and the |
| * highest lane must be live. |
| */ |
| void |
| ac_build_wg_wavescan_top(struct ac_llvm_context *ctx, struct ac_wg_scan *ws) |
| { |
| if (ws->maxwaves <= 1) |
| return; |
| |
| const LLVMValueRef last_lane = LLVMConstInt(ctx->i32, ctx->wave_size - 1, false); |
| LLVMBuilderRef builder = ctx->builder; |
| LLVMValueRef tid = ac_get_thread_id(ctx); |
| LLVMValueRef tmp; |
| |
| tmp = LLVMBuildICmp(builder, LLVMIntEQ, tid, last_lane, ""); |
| ac_build_ifcc(ctx, tmp, 1000); |
| LLVMBuildStore(builder, ws->src, LLVMBuildGEP(builder, ws->scratch, &ws->waveidx, 1, "")); |
| ac_build_endif(ctx, 1000); |
| } |
| |
| /** |
| * "Bottom half" of a scan that reduces per-wave values across an entire |
| * workgroup. |
| * |
| * The caller must place a barrier between the top and bottom halves. |
| */ |
| void |
| ac_build_wg_wavescan_bottom(struct ac_llvm_context *ctx, struct ac_wg_scan *ws) |
| { |
| const LLVMTypeRef type = LLVMTypeOf(ws->src); |
| const LLVMValueRef identity = |
| get_reduction_identity(ctx, ws->op, ac_get_type_size(type)); |
| |
| if (ws->maxwaves <= 1) { |
| ws->result_reduce = ws->src; |
| ws->result_inclusive = ws->src; |
| ws->result_exclusive = identity; |
| return; |
| } |
| assert(ws->maxwaves <= 32); |
| |
| LLVMBuilderRef builder = ctx->builder; |
| LLVMValueRef tid = ac_get_thread_id(ctx); |
| LLVMBasicBlockRef bbs[2]; |
| LLVMValueRef phivalues_scan[2]; |
| LLVMValueRef tmp, tmp2; |
| |
| bbs[0] = LLVMGetInsertBlock(builder); |
| phivalues_scan[0] = LLVMGetUndef(type); |
| |
| if (ws->enable_reduce) |
| tmp = LLVMBuildICmp(builder, LLVMIntULT, tid, ws->numwaves, ""); |
| else if (ws->enable_inclusive) |
| tmp = LLVMBuildICmp(builder, LLVMIntULE, tid, ws->waveidx, ""); |
| else |
| tmp = LLVMBuildICmp(builder, LLVMIntULT, tid, ws->waveidx, ""); |
| ac_build_ifcc(ctx, tmp, 1001); |
| { |
| tmp = LLVMBuildLoad(builder, LLVMBuildGEP(builder, ws->scratch, &tid, 1, ""), ""); |
| |
| ac_build_optimization_barrier(ctx, &tmp); |
| |
| bbs[1] = LLVMGetInsertBlock(builder); |
| phivalues_scan[1] = ac_build_scan(ctx, ws->op, tmp, identity, ws->maxwaves, true); |
| } |
| ac_build_endif(ctx, 1001); |
| |
| const LLVMValueRef scan = ac_build_phi(ctx, type, 2, phivalues_scan, bbs); |
| |
| if (ws->enable_reduce) { |
| tmp = LLVMBuildSub(builder, ws->numwaves, ctx->i32_1, ""); |
| ws->result_reduce = ac_build_readlane(ctx, scan, tmp); |
| } |
| if (ws->enable_inclusive) |
| ws->result_inclusive = ac_build_readlane(ctx, scan, ws->waveidx); |
| if (ws->enable_exclusive) { |
| tmp = LLVMBuildSub(builder, ws->waveidx, ctx->i32_1, ""); |
| tmp = ac_build_readlane(ctx, scan, tmp); |
| tmp2 = LLVMBuildICmp(builder, LLVMIntEQ, ws->waveidx, ctx->i32_0, ""); |
| ws->result_exclusive = LLVMBuildSelect(builder, tmp2, identity, tmp, ""); |
| } |
| } |
| |
| /** |
| * Inclusive scan of a per-wave value across an entire workgroup. |
| * |
| * This implies an s_barrier instruction. |
| * |
| * Unlike ac_build_inclusive_scan, the caller \em must ensure that all threads |
| * of the workgroup are live. (This requirement cannot easily be relaxed in a |
| * useful manner because of the barrier in the algorithm.) |
| */ |
| void |
| ac_build_wg_wavescan(struct ac_llvm_context *ctx, struct ac_wg_scan *ws) |
| { |
| ac_build_wg_wavescan_top(ctx, ws); |
| ac_build_s_barrier(ctx); |
| ac_build_wg_wavescan_bottom(ctx, ws); |
| } |
| |
| /** |
| * "Top half" of a scan that reduces per-thread values across an entire |
| * workgroup. |
| * |
| * All lanes must be active when this code runs. |
| */ |
| void |
| ac_build_wg_scan_top(struct ac_llvm_context *ctx, struct ac_wg_scan *ws) |
| { |
| if (ws->enable_exclusive) { |
| ws->extra = ac_build_exclusive_scan(ctx, ws->src, ws->op); |
| if (LLVMTypeOf(ws->src) == ctx->i1 && ws->op == nir_op_iadd) |
| ws->src = LLVMBuildZExt(ctx->builder, ws->src, ctx->i32, ""); |
| ws->src = ac_build_alu_op(ctx, ws->extra, ws->src, ws->op); |
| } else { |
| ws->src = ac_build_inclusive_scan(ctx, ws->src, ws->op); |
| } |
| |
| bool enable_inclusive = ws->enable_inclusive; |
| bool enable_exclusive = ws->enable_exclusive; |
| ws->enable_inclusive = false; |
| ws->enable_exclusive = ws->enable_exclusive || enable_inclusive; |
| ac_build_wg_wavescan_top(ctx, ws); |
| ws->enable_inclusive = enable_inclusive; |
| ws->enable_exclusive = enable_exclusive; |
| } |
| |
| /** |
| * "Bottom half" of a scan that reduces per-thread values across an entire |
| * workgroup. |
| * |
| * The caller must place a barrier between the top and bottom halves. |
| */ |
| void |
| ac_build_wg_scan_bottom(struct ac_llvm_context *ctx, struct ac_wg_scan *ws) |
| { |
| bool enable_inclusive = ws->enable_inclusive; |
| bool enable_exclusive = ws->enable_exclusive; |
| ws->enable_inclusive = false; |
| ws->enable_exclusive = ws->enable_exclusive || enable_inclusive; |
| ac_build_wg_wavescan_bottom(ctx, ws); |
| ws->enable_inclusive = enable_inclusive; |
| ws->enable_exclusive = enable_exclusive; |
| |
| /* ws->result_reduce is already the correct value */ |
| if (ws->enable_inclusive) |
| ws->result_inclusive = ac_build_alu_op(ctx, ws->result_inclusive, ws->src, ws->op); |
| if (ws->enable_exclusive) |
| ws->result_exclusive = ac_build_alu_op(ctx, ws->result_exclusive, ws->extra, ws->op); |
| } |
| |
| /** |
| * A scan that reduces per-thread values across an entire workgroup. |
| * |
| * The caller must ensure that all lanes are active when this code runs |
| * (WWM is insufficient!), because there is an implied barrier. |
| */ |
| void |
| ac_build_wg_scan(struct ac_llvm_context *ctx, struct ac_wg_scan *ws) |
| { |
| ac_build_wg_scan_top(ctx, ws); |
| ac_build_s_barrier(ctx); |
| ac_build_wg_scan_bottom(ctx, ws); |
| } |
| |
| LLVMValueRef |
| ac_build_quad_swizzle(struct ac_llvm_context *ctx, LLVMValueRef src, |
| unsigned lane0, unsigned lane1, unsigned lane2, unsigned lane3) |
| { |
| unsigned mask = dpp_quad_perm(lane0, lane1, lane2, lane3); |
| if (ctx->chip_class >= GFX8) { |
| return ac_build_dpp(ctx, src, src, mask, 0xf, 0xf, false); |
| } else { |
| return ac_build_ds_swizzle(ctx, src, (1 << 15) | mask); |
| } |
| } |
| |
| LLVMValueRef |
| ac_build_shuffle(struct ac_llvm_context *ctx, LLVMValueRef src, LLVMValueRef index) |
| { |
| LLVMTypeRef type = LLVMTypeOf(src); |
| LLVMValueRef result; |
| |
| index = LLVMBuildMul(ctx->builder, index, LLVMConstInt(ctx->i32, 4, 0), ""); |
| src = LLVMBuildZExt(ctx->builder, src, ctx->i32, ""); |
| |
| result = ac_build_intrinsic(ctx, "llvm.amdgcn.ds.bpermute", ctx->i32, |
| (LLVMValueRef []) {index, src}, 2, |
| AC_FUNC_ATTR_READNONE | |
| AC_FUNC_ATTR_CONVERGENT); |
| return LLVMBuildTrunc(ctx->builder, result, type, ""); |
| } |
| |
| LLVMValueRef |
| ac_build_frexp_exp(struct ac_llvm_context *ctx, LLVMValueRef src0, |
| unsigned bitsize) |
| { |
| LLVMTypeRef type; |
| char *intr; |
| |
| if (bitsize == 16) { |
| intr = "llvm.amdgcn.frexp.exp.i16.f16"; |
| type = ctx->i16; |
| } else if (bitsize == 32) { |
| intr = "llvm.amdgcn.frexp.exp.i32.f32"; |
| type = ctx->i32; |
| } else { |
| intr = "llvm.amdgcn.frexp.exp.i32.f64"; |
| type = ctx->i32; |
| } |
| |
| LLVMValueRef params[] = { |
| src0, |
| }; |
| return ac_build_intrinsic(ctx, intr, type, params, 1, |
| AC_FUNC_ATTR_READNONE); |
| } |
| LLVMValueRef |
| ac_build_frexp_mant(struct ac_llvm_context *ctx, LLVMValueRef src0, |
| unsigned bitsize) |
| { |
| LLVMTypeRef type; |
| char *intr; |
| |
| if (bitsize == 16) { |
| intr = "llvm.amdgcn.frexp.mant.f16"; |
| type = ctx->f16; |
| } else if (bitsize == 32) { |
| intr = "llvm.amdgcn.frexp.mant.f32"; |
| type = ctx->f32; |
| } else { |
| intr = "llvm.amdgcn.frexp.mant.f64"; |
| type = ctx->f64; |
| } |
| |
| LLVMValueRef params[] = { |
| src0, |
| }; |
| return ac_build_intrinsic(ctx, intr, type, params, 1, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| LLVMValueRef |
| ac_build_canonicalize(struct ac_llvm_context *ctx, LLVMValueRef src0, |
| unsigned bitsize) |
| { |
| LLVMTypeRef type; |
| char *intr; |
| |
| if (bitsize == 16) { |
| intr = "llvm.canonicalize.f16"; |
| type = ctx->f16; |
| } else if (bitsize == 32) { |
| intr = "llvm.canonicalize.f32"; |
| type = ctx->f32; |
| } else { |
| intr = "llvm.canonicalize.f64"; |
| type = ctx->f64; |
| } |
| |
| LLVMValueRef params[] = { |
| src0, |
| }; |
| return ac_build_intrinsic(ctx, intr, type, params, 1, |
| AC_FUNC_ATTR_READNONE); |
| } |
| |
| /* |
| * 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). |
| */ |
| LLVMValueRef |
| ac_build_ddxy_interp(struct ac_llvm_context *ctx, LLVMValueRef interp_ij) |
| { |
| LLVMValueRef result[4], a; |
| unsigned i; |
| |
| for (i = 0; i < 2; i++) { |
| a = LLVMBuildExtractElement(ctx->builder, interp_ij, |
| LLVMConstInt(ctx->i32, i, false), ""); |
| result[i] = ac_build_ddxy(ctx, AC_TID_MASK_TOP_LEFT, 1, a); |
| result[2+i] = ac_build_ddxy(ctx, AC_TID_MASK_TOP_LEFT, 2, a); |
| } |
| return ac_build_gather_values(ctx, result, 4); |
| } |
| |
| LLVMValueRef |
| ac_build_load_helper_invocation(struct ac_llvm_context *ctx) |
| { |
| LLVMValueRef result = ac_build_intrinsic(ctx, "llvm.amdgcn.ps.live", |
| ctx->i1, NULL, 0, |
| AC_FUNC_ATTR_READNONE); |
| result = LLVMBuildNot(ctx->builder, result, ""); |
| return LLVMBuildSExt(ctx->builder, result, ctx->i32, ""); |
| } |
| |
| LLVMValueRef |
| ac_build_is_helper_invocation(struct ac_llvm_context *ctx) |
| { |
| if (!ctx->postponed_kill) |
| return ac_build_load_helper_invocation(ctx); |
| |
| /* !(exact && postponed) */ |
| LLVMValueRef exact = ac_build_intrinsic(ctx, "llvm.amdgcn.ps.live", |
| ctx->i1, NULL, 0, |
| AC_FUNC_ATTR_READNONE); |
| |
| LLVMValueRef postponed = LLVMBuildLoad(ctx->builder, ctx->postponed_kill, ""); |
| LLVMValueRef result = LLVMBuildAnd(ctx->builder, exact, postponed, ""); |
| |
| return LLVMBuildSelect(ctx->builder, result, ctx->i32_0, |
| LLVMConstInt(ctx->i32, 0xFFFFFFFF, false), ""); |
| } |
| |
| LLVMValueRef ac_build_call(struct ac_llvm_context *ctx, LLVMValueRef func, |
| LLVMValueRef *args, unsigned num_args) |
| { |
| LLVMValueRef ret = LLVMBuildCall(ctx->builder, func, args, num_args, ""); |
| LLVMSetInstructionCallConv(ret, LLVMGetFunctionCallConv(func)); |
| return ret; |
| } |
| |
| void |
| ac_export_mrt_z(struct ac_llvm_context *ctx, LLVMValueRef depth, |
| LLVMValueRef stencil, LLVMValueRef samplemask, |
| struct ac_export_args *args) |
| { |
| unsigned mask = 0; |
| unsigned format = ac_get_spi_shader_z_format(depth != NULL, |
| stencil != NULL, |
| samplemask != NULL); |
| |
| assert(depth || stencil || samplemask); |
| |
| memset(args, 0, sizeof(*args)); |
| |
| args->valid_mask = 1; /* whether the EXEC mask is valid */ |
| args->done = 1; /* DONE bit */ |
| |
| /* Specify the target we are exporting */ |
| args->target = V_008DFC_SQ_EXP_MRTZ; |
| |
| args->compr = 0; /* COMP flag */ |
| args->out[0] = LLVMGetUndef(ctx->f32); /* R, depth */ |
| args->out[1] = LLVMGetUndef(ctx->f32); /* G, stencil test val[0:7], stencil op val[8:15] */ |
| args->out[2] = LLVMGetUndef(ctx->f32); /* B, sample mask */ |
| args->out[3] = LLVMGetUndef(ctx->f32); /* A, alpha to mask */ |
| |
| if (format == V_028710_SPI_SHADER_UINT16_ABGR) { |
| assert(!depth); |
| args->compr = 1; /* COMPR flag */ |
| |
| if (stencil) { |
| /* Stencil should be in X[23:16]. */ |
| stencil = ac_to_integer(ctx, stencil); |
| stencil = LLVMBuildShl(ctx->builder, stencil, |
| LLVMConstInt(ctx->i32, 16, 0), ""); |
| args->out[0] = ac_to_float(ctx, stencil); |
| mask |= 0x3; |
| } |
| if (samplemask) { |
| /* SampleMask should be in Y[15:0]. */ |
| args->out[1] = samplemask; |
| mask |= 0xc; |
| } |
| } else { |
| if (depth) { |
| args->out[0] = depth; |
| mask |= 0x1; |
| } |
| if (stencil) { |
| args->out[1] = stencil; |
| mask |= 0x2; |
| } |
| if (samplemask) { |
| args->out[2] = samplemask; |
| mask |= 0x4; |
| } |
| } |
| |
| /* GFX6 (except OLAND and HAINAN) has a bug that it only looks |
| * at the X writemask component. */ |
| if (ctx->chip_class == GFX6 && |
| ctx->family != CHIP_OLAND && |
| ctx->family != CHIP_HAINAN) |
| mask |= 0x1; |
| |
| /* Specify which components to enable */ |
| args->enabled_channels = mask; |
| } |
| |
| /* Send GS Alloc Req message from the first wave of the group to SPI. |
| * Message payload is: |
| * - bits 0..10: vertices in group |
| * - bits 12..22: primitives in group |
| */ |
| void ac_build_sendmsg_gs_alloc_req(struct ac_llvm_context *ctx, LLVMValueRef wave_id, |
| LLVMValueRef vtx_cnt, LLVMValueRef prim_cnt) |
| { |
| LLVMBuilderRef builder = ctx->builder; |
| LLVMValueRef tmp; |
| bool export_dummy_prim = false; |
| |
| /* HW workaround for a GPU hang with 100% culling. |
| * We always have to export at least 1 primitive. |
| * Export a degenerate triangle using vertex 0 for all 3 vertices. |
| */ |
| if (prim_cnt == ctx->i32_0 && ctx->chip_class == GFX10) { |
| assert(vtx_cnt == ctx->i32_0); |
| prim_cnt = ctx->i32_1; |
| vtx_cnt = ctx->i32_1; |
| export_dummy_prim = true; |
| } |
| |
| ac_build_ifcc(ctx, LLVMBuildICmp(builder, LLVMIntEQ, wave_id, ctx->i32_0, ""), 5020); |
| |
| tmp = LLVMBuildShl(builder, prim_cnt, LLVMConstInt(ctx->i32, 12, false),""); |
| tmp = LLVMBuildOr(builder, tmp, vtx_cnt, ""); |
| ac_build_sendmsg(ctx, AC_SENDMSG_GS_ALLOC_REQ, tmp); |
| |
| if (export_dummy_prim) { |
| struct ac_ngg_prim prim = {}; |
| /* The vertex indices are 0,0,0. */ |
| prim.passthrough = ctx->i32_0; |
| |
| struct ac_export_args pos = {}; |
| pos.out[0] = pos.out[1] = pos.out[2] = pos.out[3] = ctx->f32_0; |
| pos.target = V_008DFC_SQ_EXP_POS; |
| pos.enabled_channels = 0xf; |
| pos.done = true; |
| |
| ac_build_ifcc(ctx, LLVMBuildICmp(builder, LLVMIntEQ, ac_get_thread_id(ctx), |
| ctx->i32_0, ""), 5021); |
| ac_build_export_prim(ctx, &prim); |
| ac_build_export(ctx, &pos); |
| ac_build_endif(ctx, 5021); |
| } |
| |
| ac_build_endif(ctx, 5020); |
| } |
| |
| LLVMValueRef ac_pack_prim_export(struct ac_llvm_context *ctx, |
| const struct ac_ngg_prim *prim) |
| { |
| /* The prim export format is: |
| * - bits 0..8: index 0 |
| * - bit 9: edge flag 0 |
| * - bits 10..18: index 1 |
| * - bit 19: edge flag 1 |
| * - bits 20..28: index 2 |
| * - bit 29: edge flag 2 |
| * - bit 31: null primitive (skip) |
| */ |
| LLVMBuilderRef builder = ctx->builder; |
| LLVMValueRef tmp = LLVMBuildZExt(builder, prim->isnull, ctx->i32, ""); |
| LLVMValueRef result = LLVMBuildShl(builder, tmp, LLVMConstInt(ctx->i32, 31, false), ""); |
| |
| for (unsigned i = 0; i < prim->num_vertices; ++i) { |
| tmp = LLVMBuildShl(builder, prim->index[i], |
| LLVMConstInt(ctx->i32, 10 * i, false), ""); |
| result = LLVMBuildOr(builder, result, tmp, ""); |
| tmp = LLVMBuildZExt(builder, prim->edgeflag[i], ctx->i32, ""); |
| tmp = LLVMBuildShl(builder, tmp, |
| LLVMConstInt(ctx->i32, 10 * i + 9, false), ""); |
| result = LLVMBuildOr(builder, result, tmp, ""); |
| } |
| return result; |
| } |
| |
| void ac_build_export_prim(struct ac_llvm_context *ctx, |
| const struct ac_ngg_prim *prim) |
| { |
| struct ac_export_args args; |
| |
| if (prim->passthrough) { |
| args.out[0] = prim->passthrough; |
| } else { |
| args.out[0] = ac_pack_prim_export(ctx, prim); |
| } |
| |
| args.out[0] = LLVMBuildBitCast(ctx->builder, args.out[0], ctx->f32, ""); |
| args.out[1] = LLVMGetUndef(ctx->f32); |
| args.out[2] = LLVMGetUndef(ctx->f32); |
| args.out[3] = LLVMGetUndef(ctx->f32); |
| |
| args.target = V_008DFC_SQ_EXP_PRIM; |
| args.enabled_channels = 1; |
| args.done = true; |
| args.valid_mask = false; |
| args.compr = false; |
| |
| ac_build_export(ctx, &args); |
| } |
| |
| static LLVMTypeRef |
| arg_llvm_type(enum ac_arg_type type, unsigned size, struct ac_llvm_context *ctx) |
| { |
| if (type == AC_ARG_FLOAT) { |
| return size == 1 ? ctx->f32 : LLVMVectorType(ctx->f32, size); |
| } else if (type == AC_ARG_INT) { |
| return size == 1 ? ctx->i32 : LLVMVectorType(ctx->i32, size); |
| } else { |
| LLVMTypeRef ptr_type; |
| switch (type) { |
| case AC_ARG_CONST_PTR: |
| ptr_type = ctx->i8; |
| break; |
| case AC_ARG_CONST_FLOAT_PTR: |
| ptr_type = ctx->f32; |
| break; |
| case AC_ARG_CONST_PTR_PTR: |
| ptr_type = ac_array_in_const32_addr_space(ctx->i8); |
| break; |
| case AC_ARG_CONST_DESC_PTR: |
| ptr_type = ctx->v4i32; |
| break; |
| case AC_ARG_CONST_IMAGE_PTR: |
| ptr_type = ctx->v8i32; |
| break; |
| default: |
| unreachable("unknown arg type"); |
| } |
| if (size == 1) { |
| return ac_array_in_const32_addr_space(ptr_type); |
| } else { |
| assert(size == 2); |
| return ac_array_in_const_addr_space(ptr_type); |
| } |
| } |
| } |
| |
| LLVMValueRef |
| ac_build_main(const struct ac_shader_args *args, |
| struct ac_llvm_context *ctx, |
| enum ac_llvm_calling_convention convention, |
| const char *name, LLVMTypeRef ret_type, |
| LLVMModuleRef module) |
| { |
| LLVMTypeRef arg_types[AC_MAX_ARGS]; |
| |
| for (unsigned i = 0; i < args->arg_count; i++) { |
| arg_types[i] = arg_llvm_type(args->args[i].type, |
| args->args[i].size, ctx); |
| } |
| |
| LLVMTypeRef main_function_type = |
| LLVMFunctionType(ret_type, arg_types, args->arg_count, 0); |
| |
| LLVMValueRef main_function = |
| LLVMAddFunction(module, name, main_function_type); |
| LLVMBasicBlockRef main_function_body = |
| LLVMAppendBasicBlockInContext(ctx->context, main_function, "main_body"); |
| LLVMPositionBuilderAtEnd(ctx->builder, main_function_body); |
| |
| LLVMSetFunctionCallConv(main_function, convention); |
| for (unsigned i = 0; i < args->arg_count; ++i) { |
| LLVMValueRef P = LLVMGetParam(main_function, i); |
| |
| if (args->args[i].file != AC_ARG_SGPR) |
| continue; |
| |
| ac_add_function_attr(ctx->context, main_function, i + 1, AC_FUNC_ATTR_INREG); |
| |
| if (LLVMGetTypeKind(LLVMTypeOf(P)) == LLVMPointerTypeKind) { |
| ac_add_function_attr(ctx->context, main_function, i + 1, AC_FUNC_ATTR_NOALIAS); |
| ac_add_attr_dereferenceable(P, UINT64_MAX); |
| ac_add_attr_alignment(P, 32); |
| } |
| } |
| |
| ctx->main_function = main_function; |
| |
| if (LLVM_VERSION_MAJOR >= 11) { |
| /* Enable denormals for FP16 and FP64: */ |
| LLVMAddTargetDependentFunctionAttr(main_function, "denormal-fp-math", |
| "ieee,ieee"); |
| /* Disable denormals for FP32: */ |
| LLVMAddTargetDependentFunctionAttr(main_function, "denormal-fp-math-f32", |
| "preserve-sign,preserve-sign"); |
| } |
| return main_function; |
| } |
| |
| void ac_build_s_endpgm(struct ac_llvm_context *ctx) |
| { |
| LLVMTypeRef calltype = LLVMFunctionType(ctx->voidt, NULL, 0, false); |
| LLVMValueRef code = LLVMConstInlineAsm(calltype, "s_endpgm", "", true, false); |
| LLVMBuildCall(ctx->builder, code, NULL, 0, ""); |
| } |
| |
| LLVMValueRef ac_prefix_bitcount(struct ac_llvm_context *ctx, |
| LLVMValueRef mask, LLVMValueRef index) |
| { |
| LLVMBuilderRef builder = ctx->builder; |
| LLVMTypeRef type = LLVMTypeOf(mask); |
| |
| LLVMValueRef bit = LLVMBuildShl(builder, LLVMConstInt(type, 1, 0), |
| LLVMBuildZExt(builder, index, type, ""), ""); |
| LLVMValueRef prefix_bits = LLVMBuildSub(builder, bit, LLVMConstInt(type, 1, 0), ""); |
| LLVMValueRef prefix_mask = LLVMBuildAnd(builder, mask, prefix_bits, ""); |
| return ac_build_bit_count(ctx, prefix_mask); |
| } |
| |
| /* Compute the prefix sum of the "mask" bit array with 128 elements (bits). */ |
| LLVMValueRef ac_prefix_bitcount_2x64(struct ac_llvm_context *ctx, |
| LLVMValueRef mask[2], LLVMValueRef index) |
| { |
| LLVMBuilderRef builder = ctx->builder; |
| #if 0 |
| /* Reference version using i128. */ |
| LLVMValueRef input_mask = |
| LLVMBuildBitCast(builder, ac_build_gather_values(ctx, mask, 2), ctx->i128, ""); |
| |
| return ac_prefix_bitcount(ctx, input_mask, index); |
| #else |
| /* Optimized version using 2 64-bit masks. */ |
| LLVMValueRef is_hi, is_0, c64, c128, all_bits; |
| LLVMValueRef prefix_mask[2], shift[2], mask_bcnt0, prefix_bcnt[2]; |
| |
| /* Compute the 128-bit prefix mask. */ |
| c64 = LLVMConstInt(ctx->i32, 64, 0); |
| c128 = LLVMConstInt(ctx->i32, 128, 0); |
| all_bits = LLVMConstInt(ctx->i64, UINT64_MAX, 0); |
| /* The first index that can have non-zero high bits in the prefix mask is 65. */ |
| is_hi = LLVMBuildICmp(builder, LLVMIntUGT, index, c64, ""); |
| is_0 = LLVMBuildICmp(builder, LLVMIntEQ, index, ctx->i32_0, ""); |
| mask_bcnt0 = ac_build_bit_count(ctx, mask[0]); |
| |
| for (unsigned i = 0; i < 2; i++) { |
| shift[i] = LLVMBuildSub(builder, i ? c128 : c64, index, ""); |
| /* For i==0, index==0, the right shift by 64 doesn't give the desired result, |
| * so we handle it by the is_0 select. |
| * For i==1, index==64, same story, so we handle it by the last is_hi select. |
| * For i==0, index==64, we shift by 0, which is what we want. |
| */ |
| prefix_mask[i] = LLVMBuildLShr(builder, all_bits, |
| LLVMBuildZExt(builder, shift[i], ctx->i64, ""), ""); |
| prefix_mask[i] = LLVMBuildAnd(builder, mask[i], prefix_mask[i], ""); |
| prefix_bcnt[i] = ac_build_bit_count(ctx, prefix_mask[i]); |
| } |
| |
| prefix_bcnt[0] = LLVMBuildSelect(builder, is_0, ctx->i32_0, prefix_bcnt[0], ""); |
| prefix_bcnt[0] = LLVMBuildSelect(builder, is_hi, mask_bcnt0, prefix_bcnt[0], ""); |
| prefix_bcnt[1] = LLVMBuildSelect(builder, is_hi, prefix_bcnt[1], ctx->i32_0, ""); |
| |
| return LLVMBuildAdd(builder, prefix_bcnt[0], prefix_bcnt[1], ""); |
| #endif |
| } |
| |
| /** |
| * Convert triangle strip indices to triangle indices. This is used to decompose |
| * triangle strips into triangles. |
| */ |
| void ac_build_triangle_strip_indices_to_triangle(struct ac_llvm_context *ctx, |
| LLVMValueRef is_odd, |
| LLVMValueRef flatshade_first, |
| LLVMValueRef index[3]) |
| { |
| LLVMBuilderRef builder = ctx->builder; |
| LLVMValueRef out[3]; |
| |
| /* We need to change the vertex order for odd triangles to get correct |
| * front/back facing by swapping 2 vertex indices, but we also have to |
| * keep the provoking vertex in the same place. |
| * |
| * If the first vertex is provoking, swap index 1 and 2. |
| * If the last vertex is provoking, swap index 0 and 1. |
| */ |
| out[0] = LLVMBuildSelect(builder, flatshade_first, |
| index[0], |
| LLVMBuildSelect(builder, is_odd, |
| index[1], index[0], ""), ""); |
| out[1] = LLVMBuildSelect(builder, flatshade_first, |
| LLVMBuildSelect(builder, is_odd, |
| index[2], index[1], ""), |
| LLVMBuildSelect(builder, is_odd, |
| index[0], index[1], ""), ""); |
| out[2] = LLVMBuildSelect(builder, flatshade_first, |
| LLVMBuildSelect(builder, is_odd, |
| index[1], index[2], ""), |
| index[2], ""); |
| memcpy(index, out, sizeof(out)); |
| } |