| /// Copyright 2020 The Tint Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "src/tint/writer/hlsl/generator_impl.h" |
| |
| #include <algorithm> |
| #include <cmath> |
| #include <functional> |
| #include <iomanip> |
| #include <set> |
| #include <utility> |
| #include <vector> |
| |
| #include "src/tint/ast/call_statement.h" |
| #include "src/tint/ast/id_attribute.h" |
| #include "src/tint/ast/internal_attribute.h" |
| #include "src/tint/ast/interpolate_attribute.h" |
| #include "src/tint/ast/transform/add_empty_entry_point.h" |
| #include "src/tint/ast/transform/array_length_from_uniform.h" |
| #include "src/tint/ast/transform/binding_remapper.h" |
| #include "src/tint/ast/transform/builtin_polyfill.h" |
| #include "src/tint/ast/transform/calculate_array_length.h" |
| #include "src/tint/ast/transform/canonicalize_entry_point_io.h" |
| #include "src/tint/ast/transform/decompose_memory_access.h" |
| #include "src/tint/ast/transform/demote_to_helper.h" |
| #include "src/tint/ast/transform/direct_variable_access.h" |
| #include "src/tint/ast/transform/disable_uniformity_analysis.h" |
| #include "src/tint/ast/transform/expand_compound_assignment.h" |
| #include "src/tint/ast/transform/localize_struct_array_assignment.h" |
| #include "src/tint/ast/transform/multiplanar_external_texture.h" |
| #include "src/tint/ast/transform/num_workgroups_from_uniform.h" |
| #include "src/tint/ast/transform/promote_initializers_to_let.h" |
| #include "src/tint/ast/transform/promote_side_effects_to_decl.h" |
| #include "src/tint/ast/transform/remove_continue_in_switch.h" |
| #include "src/tint/ast/transform/remove_phonies.h" |
| #include "src/tint/ast/transform/robustness.h" |
| #include "src/tint/ast/transform/simplify_pointers.h" |
| #include "src/tint/ast/transform/truncate_interstage_variables.h" |
| #include "src/tint/ast/transform/unshadow.h" |
| #include "src/tint/ast/transform/vectorize_scalar_matrix_initializers.h" |
| #include "src/tint/ast/transform/zero_init_workgroup_memory.h" |
| #include "src/tint/ast/variable_decl_statement.h" |
| #include "src/tint/constant/splat.h" |
| #include "src/tint/constant/value.h" |
| #include "src/tint/debug.h" |
| #include "src/tint/sem/block_statement.h" |
| #include "src/tint/sem/call.h" |
| #include "src/tint/sem/function.h" |
| #include "src/tint/sem/member_accessor_expression.h" |
| #include "src/tint/sem/module.h" |
| #include "src/tint/sem/statement.h" |
| #include "src/tint/sem/struct.h" |
| #include "src/tint/sem/switch_statement.h" |
| #include "src/tint/sem/value_constructor.h" |
| #include "src/tint/sem/value_conversion.h" |
| #include "src/tint/sem/variable.h" |
| #include "src/tint/switch.h" |
| #include "src/tint/transform/manager.h" |
| #include "src/tint/type/array.h" |
| #include "src/tint/type/atomic.h" |
| #include "src/tint/type/depth_multisampled_texture.h" |
| #include "src/tint/type/depth_texture.h" |
| #include "src/tint/type/multisampled_texture.h" |
| #include "src/tint/type/sampled_texture.h" |
| #include "src/tint/type/storage_texture.h" |
| #include "src/tint/type/texture_dimension.h" |
| #include "src/tint/utils/compiler_macros.h" |
| #include "src/tint/utils/defer.h" |
| #include "src/tint/utils/map.h" |
| #include "src/tint/utils/scoped_assignment.h" |
| #include "src/tint/utils/string.h" |
| #include "src/tint/utils/string_stream.h" |
| #include "src/tint/writer/append_vector.h" |
| #include "src/tint/writer/check_supported_extensions.h" |
| #include "src/tint/writer/float_to_string.h" |
| |
| using namespace tint::number_suffixes; // NOLINT |
| |
| namespace tint::writer::hlsl { |
| namespace { |
| |
| const char kTempNamePrefix[] = "tint_tmp"; |
| |
| const char* image_format_to_rwtexture_type(builtin::TexelFormat image_format) { |
| switch (image_format) { |
| case builtin::TexelFormat::kBgra8Unorm: |
| case builtin::TexelFormat::kRgba8Unorm: |
| case builtin::TexelFormat::kRgba8Snorm: |
| case builtin::TexelFormat::kRgba16Float: |
| case builtin::TexelFormat::kR32Float: |
| case builtin::TexelFormat::kRg32Float: |
| case builtin::TexelFormat::kRgba32Float: |
| return "float4"; |
| case builtin::TexelFormat::kRgba8Uint: |
| case builtin::TexelFormat::kRgba16Uint: |
| case builtin::TexelFormat::kR32Uint: |
| case builtin::TexelFormat::kRg32Uint: |
| case builtin::TexelFormat::kRgba32Uint: |
| return "uint4"; |
| case builtin::TexelFormat::kRgba8Sint: |
| case builtin::TexelFormat::kRgba16Sint: |
| case builtin::TexelFormat::kR32Sint: |
| case builtin::TexelFormat::kRg32Sint: |
| case builtin::TexelFormat::kRgba32Sint: |
| return "int4"; |
| default: |
| return nullptr; |
| } |
| } |
| |
| void PrintF32(utils::StringStream& out, float value) { |
| if (std::isinf(value)) { |
| out << "0.0f " << (value >= 0 ? "/* inf */" : "/* -inf */"); |
| } else if (std::isnan(value)) { |
| out << "0.0f /* nan */"; |
| } else { |
| out << FloatToString(value) << "f"; |
| } |
| } |
| |
| void PrintF16(utils::StringStream& out, float value) { |
| if (std::isinf(value)) { |
| out << "0.0h " << (value >= 0 ? "/* inf */" : "/* -inf */"); |
| } else if (std::isnan(value)) { |
| out << "0.0h /* nan */"; |
| } else { |
| out << FloatToString(value) << "h"; |
| } |
| } |
| |
| // Helper for writing " : register(RX, spaceY)", where R is the register, X is |
| // the binding point binding value, and Y is the binding point group value. |
| struct RegisterAndSpace { |
| RegisterAndSpace(char r, sem::BindingPoint bp) : reg(r), binding_point(bp) {} |
| |
| const char reg; |
| sem::BindingPoint const binding_point; |
| }; |
| |
| utils::StringStream& operator<<(utils::StringStream& s, const RegisterAndSpace& rs) { |
| s << " : register(" << rs.reg << rs.binding_point.binding; |
| // Omit the space if it's 0, as it's the default. |
| // SM 5.0 doesn't support spaces, so we don't emit them if group is 0 for better compatibility. |
| if (rs.binding_point.group == 0) { |
| s << ")"; |
| } else { |
| s << ", space" << rs.binding_point.group << ")"; |
| } |
| return s; |
| } |
| |
| } // namespace |
| |
| SanitizedResult::SanitizedResult() = default; |
| SanitizedResult::~SanitizedResult() = default; |
| SanitizedResult::SanitizedResult(SanitizedResult&&) = default; |
| |
| SanitizedResult Sanitize(const Program* in, const Options& options) { |
| transform::Manager manager; |
| transform::DataMap data; |
| |
| manager.Add<ast::transform::DisableUniformityAnalysis>(); |
| |
| // ExpandCompoundAssignment must come before BuiltinPolyfill |
| manager.Add<ast::transform::ExpandCompoundAssignment>(); |
| |
| manager.Add<ast::transform::Unshadow>(); // Must come before DirectVariableAccess |
| |
| // LocalizeStructArrayAssignment must come after: |
| // * SimplifyPointers, because it assumes assignment to arrays in structs are |
| // done directly, not indirectly. |
| // TODO(crbug.com/tint/1340): See if we can get rid of the duplicate |
| // SimplifyPointers transform. Can't do it right now because |
| // LocalizeStructArrayAssignment introduces pointers. |
| manager.Add<ast::transform::SimplifyPointers>(); |
| manager.Add<ast::transform::LocalizeStructArrayAssignment>(); |
| |
| manager.Add<ast::transform::PromoteSideEffectsToDecl>(); |
| |
| if (!options.disable_robustness) { |
| // Robustness must come after PromoteSideEffectsToDecl |
| // Robustness must come before BuiltinPolyfill and CanonicalizeEntryPointIO |
| manager.Add<ast::transform::Robustness>(); |
| |
| ast::transform::Robustness::Config config = {}; |
| config.bindings_ignored = std::unordered_set<sem::BindingPoint>( |
| options.binding_points_ignored_in_robustness_transform.cbegin(), |
| options.binding_points_ignored_in_robustness_transform.cend()); |
| data.Add<ast::transform::Robustness::Config>(config); |
| } |
| |
| // Note: it is more efficient for MultiplanarExternalTexture to come after Robustness |
| data.Add<ast::transform::MultiplanarExternalTexture::NewBindingPoints>( |
| options.external_texture_options.bindings_map); |
| manager.Add<ast::transform::MultiplanarExternalTexture>(); |
| |
| // BindingRemapper must come after MultiplanarExternalTexture |
| manager.Add<ast::transform::BindingRemapper>(); |
| data.Add<ast::transform::BindingRemapper::Remappings>( |
| options.binding_remapper_options.binding_points, |
| options.binding_remapper_options.access_controls, |
| options.binding_remapper_options.allow_collisions); |
| |
| { // Builtin polyfills |
| ast::transform::BuiltinPolyfill::Builtins polyfills; |
| polyfills.acosh = ast::transform::BuiltinPolyfill::Level::kFull; |
| polyfills.asinh = true; |
| polyfills.atanh = ast::transform::BuiltinPolyfill::Level::kFull; |
| polyfills.bitshift_modulo = true; |
| polyfills.clamp_int = true; |
| // TODO(crbug.com/tint/1449): Some of these can map to HLSL's `firstbitlow` |
| // and `firstbithigh`. |
| polyfills.conv_f32_to_iu32 = true; |
| polyfills.count_leading_zeros = true; |
| polyfills.count_trailing_zeros = true; |
| polyfills.extract_bits = ast::transform::BuiltinPolyfill::Level::kFull; |
| polyfills.first_leading_bit = true; |
| polyfills.first_trailing_bit = true; |
| polyfills.insert_bits = ast::transform::BuiltinPolyfill::Level::kFull; |
| polyfills.int_div_mod = true; |
| polyfills.precise_float_mod = true; |
| polyfills.reflect_vec2_f32 = options.polyfill_reflect_vec2_f32; |
| polyfills.texture_sample_base_clamp_to_edge_2d_f32 = true; |
| polyfills.workgroup_uniform_load = true; |
| data.Add<ast::transform::BuiltinPolyfill::Config>(polyfills); |
| manager.Add<ast::transform::BuiltinPolyfill>(); // Must come before DirectVariableAccess |
| } |
| |
| manager.Add<ast::transform::DirectVariableAccess>(); |
| |
| if (!options.disable_workgroup_init) { |
| // ZeroInitWorkgroupMemory must come before CanonicalizeEntryPointIO as |
| // ZeroInitWorkgroupMemory may inject new builtin parameters. |
| manager.Add<ast::transform::ZeroInitWorkgroupMemory>(); |
| } |
| |
| // CanonicalizeEntryPointIO must come after Robustness |
| manager.Add<ast::transform::CanonicalizeEntryPointIO>(); |
| |
| if (options.truncate_interstage_variables) { |
| // When interstage_locations is empty, it means there's no user-defined interstage variables |
| // being used in the next stage. Still, HLSL compiler register mismatch could happen, if |
| // there's builtin inputs used in the next stage. So we still run |
| // TruncateInterstageVariables transform. |
| |
| // TruncateInterstageVariables itself will skip when interstage_locations matches exactly |
| // with the current stage output. |
| |
| // Build the config for internal TruncateInterstageVariables transform. |
| ast::transform::TruncateInterstageVariables::Config truncate_interstage_variables_cfg; |
| truncate_interstage_variables_cfg.interstage_locations = |
| std::move(options.interstage_locations); |
| manager.Add<ast::transform::TruncateInterstageVariables>(); |
| data.Add<ast::transform::TruncateInterstageVariables::Config>( |
| std::move(truncate_interstage_variables_cfg)); |
| } |
| |
| // NumWorkgroupsFromUniform must come after CanonicalizeEntryPointIO, as it |
| // assumes that num_workgroups builtins only appear as struct members and are |
| // only accessed directly via member accessors. |
| manager.Add<ast::transform::NumWorkgroupsFromUniform>(); |
| manager.Add<ast::transform::VectorizeScalarMatrixInitializers>(); |
| manager.Add<ast::transform::SimplifyPointers>(); |
| manager.Add<ast::transform::RemovePhonies>(); |
| |
| // Build the config for the internal ArrayLengthFromUniform transform. |
| auto& array_length_from_uniform = options.array_length_from_uniform; |
| ast::transform::ArrayLengthFromUniform::Config array_length_from_uniform_cfg( |
| array_length_from_uniform.ubo_binding); |
| array_length_from_uniform_cfg.bindpoint_to_size_index = |
| array_length_from_uniform.bindpoint_to_size_index; |
| |
| // DemoteToHelper must come after CanonicalizeEntryPointIO, PromoteSideEffectsToDecl, and |
| // ExpandCompoundAssignment. |
| // TODO(crbug.com/tint/1752): This is only necessary when FXC is being used. |
| manager.Add<ast::transform::DemoteToHelper>(); |
| |
| // ArrayLengthFromUniform must come after SimplifyPointers as it assumes that the form of the |
| // array length argument is &var.array. |
| manager.Add<ast::transform::ArrayLengthFromUniform>(); |
| data.Add<ast::transform::ArrayLengthFromUniform::Config>( |
| std::move(array_length_from_uniform_cfg)); |
| // DecomposeMemoryAccess must come after: |
| // * SimplifyPointers, as we cannot take the address of calls to |
| // DecomposeMemoryAccess::Intrinsic and we need to fold away the address-of and dereferences |
| // of `*(&(intrinsic_load()))` expressions. |
| // * RemovePhonies, as phonies can be assigned a pointer to a |
| // non-constructible buffer, or dynamic array, which DMA cannot cope with. |
| manager.Add<ast::transform::DecomposeMemoryAccess>(); |
| // CalculateArrayLength must come after DecomposeMemoryAccess, as |
| // DecomposeMemoryAccess special-cases the arrayLength() intrinsic, which |
| // will be transformed by CalculateArrayLength |
| manager.Add<ast::transform::CalculateArrayLength>(); |
| manager.Add<ast::transform::PromoteInitializersToLet>(); |
| |
| manager.Add<ast::transform::RemoveContinueInSwitch>(); |
| |
| manager.Add<ast::transform::AddEmptyEntryPoint>(); |
| |
| data.Add<ast::transform::CanonicalizeEntryPointIO::Config>( |
| ast::transform::CanonicalizeEntryPointIO::ShaderStyle::kHlsl); |
| data.Add<ast::transform::NumWorkgroupsFromUniform::Config>(options.root_constant_binding_point); |
| |
| SanitizedResult result; |
| transform::DataMap outputs; |
| result.program = manager.Run(in, data, outputs); |
| if (auto* res = outputs.Get<ast::transform::ArrayLengthFromUniform::Result>()) { |
| result.used_array_length_from_uniform_indices = std::move(res->used_size_indices); |
| } |
| return result; |
| } |
| |
| GeneratorImpl::GeneratorImpl(const Program* program) : TextGenerator(program) {} |
| |
| GeneratorImpl::~GeneratorImpl() = default; |
| |
| bool GeneratorImpl::Generate() { |
| if (!CheckSupportedExtensions("HLSL", program_->AST(), diagnostics_, |
| utils::Vector{ |
| builtin::Extension::kChromiumDisableUniformityAnalysis, |
| builtin::Extension::kChromiumExperimentalDp4A, |
| builtin::Extension::kChromiumExperimentalFullPtrParameters, |
| builtin::Extension::kChromiumExperimentalPushConstant, |
| builtin::Extension::kF16, |
| })) { |
| return false; |
| } |
| |
| const utils::TypeInfo* last_kind = nullptr; |
| size_t last_padding_line = 0; |
| |
| auto* mod = builder_.Sem().Module(); |
| for (auto* decl : mod->DependencyOrderedDeclarations()) { |
| if (decl->IsAnyOf<ast::Alias, ast::DiagnosticDirective, ast::Enable, ast::ConstAssert>()) { |
| continue; // These are not emitted. |
| } |
| |
| // Emit a new line between declarations if the type of declaration has |
| // changed, or we're about to emit a function |
| auto* kind = &decl->TypeInfo(); |
| if (current_buffer_->lines.size() != last_padding_line) { |
| if (last_kind && (last_kind != kind || decl->Is<ast::Function>())) { |
| line(); |
| last_padding_line = current_buffer_->lines.size(); |
| } |
| } |
| last_kind = kind; |
| |
| bool ok = Switch( |
| decl, |
| [&](const ast::Variable* global) { // |
| return EmitGlobalVariable(global); |
| }, |
| [&](const ast::Struct* str) { |
| auto* ty = builder_.Sem().Get(str); |
| auto address_space_uses = ty->AddressSpaceUsage(); |
| if (address_space_uses.size() != |
| (address_space_uses.count(builtin::AddressSpace::kStorage) + |
| address_space_uses.count(builtin::AddressSpace::kUniform))) { |
| // The structure is used as something other than a storage buffer or |
| // uniform buffer, so it needs to be emitted. |
| // Storage buffer are read and written to via a ByteAddressBuffer |
| // instead of true structure. |
| // Structures used as uniform buffer are read from an array of |
| // vectors instead of true structure. |
| return EmitStructType(current_buffer_, ty); |
| } |
| return true; |
| }, |
| [&](const ast::Function* func) { |
| if (func->IsEntryPoint()) { |
| return EmitEntryPointFunction(func); |
| } |
| return EmitFunction(func); |
| }, |
| [&](Default) { |
| TINT_ICE(Writer, diagnostics_) |
| << "unhandled module-scope declaration: " << decl->TypeInfo().name; |
| return false; |
| }); |
| |
| if (!ok) { |
| return false; |
| } |
| } |
| |
| if (!helpers_.lines.empty()) { |
| current_buffer_->Insert(helpers_, 0, 0); |
| } |
| |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitDynamicVectorAssignment(const ast::AssignmentStatement* stmt, |
| const type::Vector* vec) { |
| auto name = utils::GetOrCreate(dynamic_vector_write_, vec, [&]() -> std::string { |
| std::string fn; |
| { |
| utils::StringStream ss; |
| if (!EmitType(ss, vec, tint::builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "")) { |
| return ""; |
| } |
| fn = UniqueIdentifier("set_" + ss.str()); |
| } |
| { |
| auto out = line(&helpers_); |
| out << "void " << fn << "(inout "; |
| if (!EmitTypeAndName(out, vec, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "vec")) { |
| return ""; |
| } |
| out << ", int idx, "; |
| if (!EmitTypeAndName(out, vec->type(), builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "val")) { |
| return ""; |
| } |
| out << ") {"; |
| } |
| { |
| ScopedIndent si(&helpers_); |
| auto out = line(&helpers_); |
| switch (vec->Width()) { |
| case 2: |
| out << "vec = (idx.xx == int2(0, 1)) ? val.xx : vec;"; |
| break; |
| case 3: |
| out << "vec = (idx.xxx == int3(0, 1, 2)) ? val.xxx : vec;"; |
| break; |
| case 4: |
| out << "vec = (idx.xxxx == int4(0, 1, 2, 3)) ? val.xxxx : vec;"; |
| break; |
| default: |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "invalid vector size " << vec->Width(); |
| break; |
| } |
| } |
| line(&helpers_) << "}"; |
| line(&helpers_); |
| return fn; |
| }); |
| |
| if (name.empty()) { |
| return false; |
| } |
| |
| auto* ast_access_expr = stmt->lhs->As<ast::IndexAccessorExpression>(); |
| |
| auto out = line(); |
| out << name << "("; |
| if (!EmitExpression(out, ast_access_expr->object)) { |
| return false; |
| } |
| out << ", "; |
| if (!EmitExpression(out, ast_access_expr->index)) { |
| return false; |
| } |
| out << ", "; |
| if (!EmitExpression(out, stmt->rhs)) { |
| return false; |
| } |
| out << ");"; |
| |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitDynamicMatrixVectorAssignment(const ast::AssignmentStatement* stmt, |
| const type::Matrix* mat) { |
| auto name = utils::GetOrCreate(dynamic_matrix_vector_write_, mat, [&]() -> std::string { |
| std::string fn; |
| { |
| utils::StringStream ss; |
| if (!EmitType(ss, mat, tint::builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "")) { |
| return ""; |
| } |
| fn = UniqueIdentifier("set_vector_" + ss.str()); |
| } |
| { |
| auto out = line(&helpers_); |
| out << "void " << fn << "(inout "; |
| if (!EmitTypeAndName(out, mat, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "mat")) { |
| return ""; |
| } |
| out << ", int col, "; |
| if (!EmitTypeAndName(out, mat->ColumnType(), builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "val")) { |
| return ""; |
| } |
| out << ") {"; |
| } |
| { |
| ScopedIndent si(&helpers_); |
| line(&helpers_) << "switch (col) {"; |
| { |
| ScopedIndent si2(&helpers_); |
| for (uint32_t i = 0; i < mat->columns(); ++i) { |
| line(&helpers_) << "case " << i << ": mat[" << i << "] = val; break;"; |
| } |
| } |
| line(&helpers_) << "}"; |
| } |
| line(&helpers_) << "}"; |
| line(&helpers_); |
| return fn; |
| }); |
| |
| if (name.empty()) { |
| return false; |
| } |
| |
| auto* ast_access_expr = stmt->lhs->As<ast::IndexAccessorExpression>(); |
| |
| auto out = line(); |
| out << name << "("; |
| if (!EmitExpression(out, ast_access_expr->object)) { |
| return false; |
| } |
| out << ", "; |
| if (!EmitExpression(out, ast_access_expr->index)) { |
| return false; |
| } |
| out << ", "; |
| if (!EmitExpression(out, stmt->rhs)) { |
| return false; |
| } |
| out << ");"; |
| |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitDynamicMatrixScalarAssignment(const ast::AssignmentStatement* stmt, |
| const type::Matrix* mat) { |
| auto* lhs_row_access = stmt->lhs->As<ast::IndexAccessorExpression>(); |
| auto* lhs_col_access = lhs_row_access->object->As<ast::IndexAccessorExpression>(); |
| |
| auto name = utils::GetOrCreate(dynamic_matrix_scalar_write_, mat, [&]() -> std::string { |
| std::string fn; |
| { |
| utils::StringStream ss; |
| if (!EmitType(ss, mat, tint::builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "")) { |
| return ""; |
| } |
| fn = UniqueIdentifier("set_scalar_" + ss.str()); |
| } |
| { |
| auto out = line(&helpers_); |
| out << "void " << fn << "(inout "; |
| if (!EmitTypeAndName(out, mat, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "mat")) { |
| return ""; |
| } |
| out << ", int col, int row, "; |
| if (!EmitTypeAndName(out, mat->type(), builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "val")) { |
| return ""; |
| } |
| out << ") {"; |
| } |
| { |
| ScopedIndent si(&helpers_); |
| line(&helpers_) << "switch (col) {"; |
| { |
| ScopedIndent si2(&helpers_); |
| for (uint32_t i = 0; i < mat->columns(); ++i) { |
| line(&helpers_) << "case " << i << ":"; |
| { |
| auto vec_name = "mat[" + std::to_string(i) + "]"; |
| ScopedIndent si3(&helpers_); |
| { |
| auto out = line(&helpers_); |
| switch (mat->rows()) { |
| case 2: |
| out << vec_name |
| << " = (row.xx == int2(0, 1)) ? val.xx : " << vec_name |
| << ";"; |
| break; |
| case 3: |
| out << vec_name |
| << " = (row.xxx == int3(0, 1, 2)) ? val.xxx : " << vec_name |
| << ";"; |
| break; |
| case 4: |
| out << vec_name |
| << " = (row.xxxx == int4(0, 1, 2, 3)) ? val.xxxx : " |
| << vec_name << ";"; |
| break; |
| default: { |
| auto* vec = TypeOf(lhs_row_access->object) |
| ->UnwrapRef() |
| ->As<type::Vector>(); |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "invalid vector size " << vec->Width(); |
| break; |
| } |
| } |
| } |
| line(&helpers_) << "break;"; |
| } |
| } |
| } |
| line(&helpers_) << "}"; |
| } |
| line(&helpers_) << "}"; |
| line(&helpers_); |
| return fn; |
| }); |
| |
| if (name.empty()) { |
| return false; |
| } |
| |
| auto out = line(); |
| out << name << "("; |
| if (!EmitExpression(out, lhs_col_access->object)) { |
| return false; |
| } |
| out << ", "; |
| if (!EmitExpression(out, lhs_col_access->index)) { |
| return false; |
| } |
| out << ", "; |
| if (!EmitExpression(out, lhs_row_access->index)) { |
| return false; |
| } |
| out << ", "; |
| if (!EmitExpression(out, stmt->rhs)) { |
| return false; |
| } |
| out << ");"; |
| |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitIndexAccessor(utils::StringStream& out, |
| const ast::IndexAccessorExpression* expr) { |
| if (!EmitExpression(out, expr->object)) { |
| return false; |
| } |
| out << "["; |
| |
| if (!EmitExpression(out, expr->index)) { |
| return false; |
| } |
| out << "]"; |
| |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitBitcast(utils::StringStream& out, const ast::BitcastExpression* expr) { |
| auto* type = TypeOf(expr); |
| if (auto* vec = type->UnwrapRef()->As<type::Vector>()) { |
| type = vec->type(); |
| } |
| |
| if (!type->is_integer_scalar() && !type->is_float_scalar()) { |
| diagnostics_.add_error(diag::System::Writer, |
| "Unable to do bitcast to type " + type->FriendlyName()); |
| return false; |
| } |
| |
| out << "as"; |
| if (!EmitType(out, type, builtin::AddressSpace::kUndefined, builtin::Access::kReadWrite, "")) { |
| return false; |
| } |
| out << "("; |
| if (!EmitExpression(out, expr->expr)) { |
| return false; |
| } |
| out << ")"; |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitAssign(const ast::AssignmentStatement* stmt) { |
| if (auto* lhs_access = stmt->lhs->As<ast::IndexAccessorExpression>()) { |
| // BUG(crbug.com/tint/1333): work around assignment of scalar to matrices |
| // with at least one dynamic index |
| if (auto* lhs_sub_access = lhs_access->object->As<ast::IndexAccessorExpression>()) { |
| if (auto* mat = TypeOf(lhs_sub_access->object)->UnwrapRef()->As<type::Matrix>()) { |
| auto* rhs_row_idx_sem = builder_.Sem().GetVal(lhs_access->index); |
| auto* rhs_col_idx_sem = builder_.Sem().GetVal(lhs_sub_access->index); |
| if (!rhs_row_idx_sem->ConstantValue() || !rhs_col_idx_sem->ConstantValue()) { |
| return EmitDynamicMatrixScalarAssignment(stmt, mat); |
| } |
| } |
| } |
| // BUG(crbug.com/tint/1333): work around assignment of vector to matrices |
| // with dynamic indices |
| const auto* lhs_access_type = TypeOf(lhs_access->object)->UnwrapRef(); |
| if (auto* mat = lhs_access_type->As<type::Matrix>()) { |
| auto* lhs_index_sem = builder_.Sem().GetVal(lhs_access->index); |
| if (!lhs_index_sem->ConstantValue()) { |
| return EmitDynamicMatrixVectorAssignment(stmt, mat); |
| } |
| } |
| // BUG(crbug.com/tint/534): work around assignment to vectors with dynamic |
| // indices |
| if (auto* vec = lhs_access_type->As<type::Vector>()) { |
| auto* rhs_sem = builder_.Sem().GetVal(lhs_access->index); |
| if (!rhs_sem->ConstantValue()) { |
| return EmitDynamicVectorAssignment(stmt, vec); |
| } |
| } |
| } |
| |
| auto out = line(); |
| if (!EmitExpression(out, stmt->lhs)) { |
| return false; |
| } |
| out << " = "; |
| if (!EmitExpression(out, stmt->rhs)) { |
| return false; |
| } |
| out << ";"; |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitBinary(utils::StringStream& out, const ast::BinaryExpression* expr) { |
| if (expr->op == ast::BinaryOp::kLogicalAnd || expr->op == ast::BinaryOp::kLogicalOr) { |
| auto name = UniqueIdentifier(kTempNamePrefix); |
| |
| { |
| auto pre = line(); |
| pre << "bool " << name << " = "; |
| if (!EmitExpression(pre, expr->lhs)) { |
| return false; |
| } |
| pre << ";"; |
| } |
| |
| if (expr->op == ast::BinaryOp::kLogicalOr) { |
| line() << "if (!" << name << ") {"; |
| } else { |
| line() << "if (" << name << ") {"; |
| } |
| |
| { |
| ScopedIndent si(this); |
| auto pre = line(); |
| pre << name << " = "; |
| if (!EmitExpression(pre, expr->rhs)) { |
| return false; |
| } |
| pre << ";"; |
| } |
| |
| line() << "}"; |
| |
| out << "(" << name << ")"; |
| return true; |
| } |
| |
| auto* lhs_type = TypeOf(expr->lhs)->UnwrapRef(); |
| auto* rhs_type = TypeOf(expr->rhs)->UnwrapRef(); |
| // Multiplying by a matrix requires the use of `mul` in order to get the |
| // type of multiply we desire. |
| if (expr->op == ast::BinaryOp::kMultiply && |
| ((lhs_type->Is<type::Vector>() && rhs_type->Is<type::Matrix>()) || |
| (lhs_type->Is<type::Matrix>() && rhs_type->Is<type::Vector>()) || |
| (lhs_type->Is<type::Matrix>() && rhs_type->Is<type::Matrix>()))) { |
| // Matrices are transposed, so swap LHS and RHS. |
| out << "mul("; |
| if (!EmitExpression(out, expr->rhs)) { |
| return false; |
| } |
| out << ", "; |
| if (!EmitExpression(out, expr->lhs)) { |
| return false; |
| } |
| out << ")"; |
| |
| return true; |
| } |
| |
| ScopedParen sp(out); |
| |
| if (!EmitExpression(out, expr->lhs)) { |
| return false; |
| } |
| out << " "; |
| |
| switch (expr->op) { |
| case ast::BinaryOp::kAnd: |
| out << "&"; |
| break; |
| case ast::BinaryOp::kOr: |
| out << "|"; |
| break; |
| case ast::BinaryOp::kXor: |
| out << "^"; |
| break; |
| case ast::BinaryOp::kLogicalAnd: |
| case ast::BinaryOp::kLogicalOr: { |
| // These are both handled above. |
| TINT_UNREACHABLE(Writer, diagnostics_); |
| return false; |
| } |
| case ast::BinaryOp::kEqual: |
| out << "=="; |
| break; |
| case ast::BinaryOp::kNotEqual: |
| out << "!="; |
| break; |
| case ast::BinaryOp::kLessThan: |
| out << "<"; |
| break; |
| case ast::BinaryOp::kGreaterThan: |
| out << ">"; |
| break; |
| case ast::BinaryOp::kLessThanEqual: |
| out << "<="; |
| break; |
| case ast::BinaryOp::kGreaterThanEqual: |
| out << ">="; |
| break; |
| case ast::BinaryOp::kShiftLeft: |
| out << "<<"; |
| break; |
| case ast::BinaryOp::kShiftRight: |
| // TODO(dsinclair): MSL is based on C++14, and >> in C++14 has |
| // implementation-defined behaviour for negative LHS. We may have to |
| // generate extra code to implement WGSL-specified behaviour for negative |
| // LHS. |
| out << R"(>>)"; |
| break; |
| |
| case ast::BinaryOp::kAdd: |
| out << "+"; |
| break; |
| case ast::BinaryOp::kSubtract: |
| out << "-"; |
| break; |
| case ast::BinaryOp::kMultiply: |
| out << "*"; |
| break; |
| case ast::BinaryOp::kDivide: |
| out << "/"; |
| break; |
| case ast::BinaryOp::kModulo: |
| out << "%"; |
| break; |
| case ast::BinaryOp::kNone: |
| diagnostics_.add_error(diag::System::Writer, "missing binary operation type"); |
| return false; |
| } |
| out << " "; |
| |
| if (!EmitExpression(out, expr->rhs)) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitStatements(utils::VectorRef<const ast::Statement*> stmts) { |
| for (auto* s : stmts) { |
| if (!EmitStatement(s)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitStatementsWithIndent(utils::VectorRef<const ast::Statement*> stmts) { |
| ScopedIndent si(this); |
| return EmitStatements(stmts); |
| } |
| |
| bool GeneratorImpl::EmitBlock(const ast::BlockStatement* stmt) { |
| line() << "{"; |
| if (!EmitStatementsWithIndent(stmt->statements)) { |
| return false; |
| } |
| line() << "}"; |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitBreak(const ast::BreakStatement*) { |
| line() << "break;"; |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitBreakIf(const ast::BreakIfStatement* b) { |
| auto out = line(); |
| out << "if ("; |
| if (!EmitExpression(out, b->condition)) { |
| return false; |
| } |
| out << ") { break; }"; |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitCall(utils::StringStream& out, const ast::CallExpression* expr) { |
| auto* call = builder_.Sem().Get<sem::Call>(expr); |
| auto* target = call->Target(); |
| return Switch( |
| target, // |
| [&](const sem::Function* func) { return EmitFunctionCall(out, call, func); }, |
| [&](const sem::Builtin* builtin) { return EmitBuiltinCall(out, call, builtin); }, |
| [&](const sem::ValueConversion* conv) { return EmitValueConversion(out, call, conv); }, |
| [&](const sem::ValueConstructor* ctor) { return EmitValueConstructor(out, call, ctor); }, |
| [&](Default) { |
| TINT_ICE(Writer, diagnostics_) << "unhandled call target: " << target->TypeInfo().name; |
| return false; |
| }); |
| } |
| |
| bool GeneratorImpl::EmitFunctionCall(utils::StringStream& out, |
| const sem::Call* call, |
| const sem::Function* func) { |
| auto* expr = call->Declaration(); |
| |
| if (ast::HasAttribute<ast::transform::CalculateArrayLength::BufferSizeIntrinsic>( |
| func->Declaration()->attributes)) { |
| // Special function generated by the CalculateArrayLength transform for |
| // calling X.GetDimensions(Y) |
| if (!EmitExpression(out, call->Arguments()[0]->Declaration())) { |
| return false; |
| } |
| out << ".GetDimensions("; |
| if (!EmitExpression(out, call->Arguments()[1]->Declaration())) { |
| return false; |
| } |
| out << ")"; |
| return true; |
| } |
| |
| if (auto* intrinsic = ast::GetAttribute<ast::transform::DecomposeMemoryAccess::Intrinsic>( |
| func->Declaration()->attributes)) { |
| switch (intrinsic->address_space) { |
| case builtin::AddressSpace::kUniform: |
| return EmitUniformBufferAccess(out, expr, intrinsic); |
| case builtin::AddressSpace::kStorage: |
| if (!intrinsic->IsAtomic()) { |
| return EmitStorageBufferAccess(out, expr, intrinsic); |
| } |
| break; |
| default: |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "unsupported DecomposeMemoryAccess::Intrinsic address space:" |
| << intrinsic->address_space; |
| return false; |
| } |
| } |
| |
| out << func->Declaration()->name->symbol.Name() << "("; |
| |
| bool first = true; |
| for (auto* arg : call->Arguments()) { |
| if (!first) { |
| out << ", "; |
| } |
| first = false; |
| |
| if (!EmitExpression(out, arg->Declaration())) { |
| return false; |
| } |
| } |
| |
| out << ")"; |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitBuiltinCall(utils::StringStream& out, |
| const sem::Call* call, |
| const sem::Builtin* builtin) { |
| const auto type = builtin->Type(); |
| |
| auto* expr = call->Declaration(); |
| if (builtin->IsTexture()) { |
| return EmitTextureCall(out, call, builtin); |
| } |
| if (type == builtin::Function::kSelect) { |
| return EmitSelectCall(out, expr); |
| } |
| if (type == builtin::Function::kModf) { |
| return EmitModfCall(out, expr, builtin); |
| } |
| if (type == builtin::Function::kFrexp) { |
| return EmitFrexpCall(out, expr, builtin); |
| } |
| if (type == builtin::Function::kDegrees) { |
| return EmitDegreesCall(out, expr, builtin); |
| } |
| if (type == builtin::Function::kRadians) { |
| return EmitRadiansCall(out, expr, builtin); |
| } |
| if (type == builtin::Function::kSign) { |
| return EmitSignCall(out, call, builtin); |
| } |
| if (type == builtin::Function::kQuantizeToF16) { |
| return EmitQuantizeToF16Call(out, expr, builtin); |
| } |
| if (type == builtin::Function::kTrunc) { |
| return EmitTruncCall(out, expr, builtin); |
| } |
| if (builtin->IsDataPacking()) { |
| return EmitDataPackingCall(out, expr, builtin); |
| } |
| if (builtin->IsDataUnpacking()) { |
| return EmitDataUnpackingCall(out, expr, builtin); |
| } |
| if (builtin->IsBarrier()) { |
| return EmitBarrierCall(out, builtin); |
| } |
| if (builtin->IsAtomic()) { |
| return EmitWorkgroupAtomicCall(out, expr, builtin); |
| } |
| if (builtin->IsDP4a()) { |
| return EmitDP4aCall(out, expr, builtin); |
| } |
| |
| auto name = generate_builtin_name(builtin); |
| if (name.empty()) { |
| return false; |
| } |
| |
| // Handle single argument builtins that only accept and return uint (not int overload). We need |
| // to explicitly cast the return value (we also cast the arg for good measure). See |
| // crbug.com/tint/1550 |
| if (type == builtin::Function::kCountOneBits || type == builtin::Function::kReverseBits) { |
| auto* arg = call->Arguments()[0]; |
| if (arg->Type()->UnwrapRef()->is_signed_integer_scalar_or_vector()) { |
| out << "asint(" << name << "(asuint("; |
| if (!EmitExpression(out, arg->Declaration())) { |
| return false; |
| } |
| out << ")))"; |
| return true; |
| } |
| } |
| |
| out << name << "("; |
| |
| bool first = true; |
| for (auto* arg : call->Arguments()) { |
| if (!first) { |
| out << ", "; |
| } |
| first = false; |
| |
| if (!EmitExpression(out, arg->Declaration())) { |
| return false; |
| } |
| } |
| |
| out << ")"; |
| |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitValueConversion(utils::StringStream& out, |
| const sem::Call* call, |
| const sem::ValueConversion* conv) { |
| if (!EmitType(out, conv->Target(), builtin::AddressSpace::kUndefined, |
| builtin::Access::kReadWrite, "")) { |
| return false; |
| } |
| out << "("; |
| |
| if (!EmitExpression(out, call->Arguments()[0]->Declaration())) { |
| return false; |
| } |
| |
| out << ")"; |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitValueConstructor(utils::StringStream& out, |
| const sem::Call* call, |
| const sem::ValueConstructor* ctor) { |
| auto* type = call->Type(); |
| |
| // If the value constructor arguments are empty then we need to construct with the zero value |
| // for all components. |
| if (call->Arguments().IsEmpty()) { |
| return EmitZeroValue(out, type); |
| } |
| |
| // Single parameter matrix initializers must be identity initializer. |
| // It could also be conversions between f16 and f32 matrix when f16 is properly supported. |
| if (type->Is<type::Matrix>() && call->Arguments().Length() == 1) { |
| if (!ctor->Parameters()[0]->Type()->UnwrapRef()->is_float_matrix()) { |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "found a single-parameter matrix initializer that is not identity initializer"; |
| return false; |
| } |
| } |
| |
| bool brackets = type->IsAnyOf<type::Array, type::Struct>(); |
| |
| // For single-value vector initializers, swizzle the scalar to the right |
| // vector dimension using .x |
| const bool is_single_value_vector_init = type->is_scalar_vector() && |
| call->Arguments().Length() == 1 && |
| ctor->Parameters()[0]->Type()->Is<type::Scalar>(); |
| |
| if (brackets) { |
| out << "{"; |
| } else { |
| if (!EmitType(out, type, builtin::AddressSpace::kUndefined, builtin::Access::kReadWrite, |
| "")) { |
| return false; |
| } |
| out << "("; |
| } |
| |
| if (is_single_value_vector_init) { |
| out << "("; |
| } |
| |
| bool first = true; |
| for (auto* e : call->Arguments()) { |
| if (!first) { |
| out << ", "; |
| } |
| first = false; |
| |
| if (!EmitExpression(out, e->Declaration())) { |
| return false; |
| } |
| } |
| |
| if (is_single_value_vector_init) { |
| out << ")." << std::string(type->As<type::Vector>()->Width(), 'x'); |
| } |
| |
| out << (brackets ? "}" : ")"); |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitUniformBufferAccess( |
| utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const ast::transform::DecomposeMemoryAccess::Intrinsic* intrinsic) { |
| auto const buffer = intrinsic->Buffer()->identifier->symbol.Name(); |
| auto* const offset = expr->args[0]; |
| |
| // offset in bytes |
| uint32_t scalar_offset_bytes = 0; |
| // offset in uint (4 bytes) |
| uint32_t scalar_offset_index = 0; |
| // expression to calculate offset in bytes |
| std::string scalar_offset_bytes_expr; |
| // expression to calculate offset in uint, by dividing scalar_offset_bytes_expr by 4 |
| std::string scalar_offset_index_expr; |
| // expression to calculate offset in uint, independently |
| std::string scalar_offset_index_unified_expr; |
| |
| // If true, use scalar_offset_index, otherwise use scalar_offset_index_expr |
| bool scalar_offset_constant = false; |
| |
| if (auto* val = builder_.Sem().GetVal(offset)->ConstantValue()) { |
| TINT_ASSERT(Writer, val->Type()->Is<type::U32>()); |
| scalar_offset_bytes = static_cast<uint32_t>(val->ValueAs<AInt>()); |
| scalar_offset_index = scalar_offset_bytes / 4; // bytes -> scalar index |
| scalar_offset_constant = true; |
| } |
| |
| // If true, scalar_offset_bytes or scalar_offset_bytes_expr should be used, otherwise only use |
| // scalar_offset_index or scalar_offset_index_unified_expr. Currently only loading f16 scalar |
| // require using offset in bytes. |
| const bool need_offset_in_bytes = |
| intrinsic->type == ast::transform::DecomposeMemoryAccess::Intrinsic::DataType::kF16; |
| |
| if (!scalar_offset_constant) { |
| // UBO offset not compile-time known. |
| // Calculate the scalar offset into a temporary. |
| if (need_offset_in_bytes) { |
| scalar_offset_bytes_expr = UniqueIdentifier("scalar_offset_bytes"); |
| scalar_offset_index_expr = UniqueIdentifier("scalar_offset_index"); |
| { |
| auto pre = line(); |
| pre << "const uint " << scalar_offset_bytes_expr << " = ("; |
| if (!EmitExpression(pre, offset)) { |
| return false; |
| } |
| pre << ");"; |
| } |
| line() << "const uint " << scalar_offset_index_expr << " = " << scalar_offset_bytes_expr |
| << " / 4;"; |
| } else { |
| scalar_offset_index_unified_expr = UniqueIdentifier("scalar_offset"); |
| auto pre = line(); |
| pre << "const uint " << scalar_offset_index_unified_expr << " = ("; |
| if (!EmitExpression(pre, offset)) { |
| return false; |
| } |
| pre << ") / 4;"; |
| } |
| } |
| |
| const char swizzle[] = {'x', 'y', 'z', 'w'}; |
| |
| using Op = ast::transform::DecomposeMemoryAccess::Intrinsic::Op; |
| using DataType = ast::transform::DecomposeMemoryAccess::Intrinsic::DataType; |
| switch (intrinsic->op) { |
| case Op::kLoad: { |
| auto cast = [&](const char* to, auto&& load) { |
| out << to << "("; |
| auto result = load(); |
| out << ")"; |
| return result; |
| }; |
| auto load_u32_to = [&](utils::StringStream& target) { |
| target << buffer; |
| if (scalar_offset_constant) { |
| target << "[" << (scalar_offset_index / 4) << "]." |
| << swizzle[scalar_offset_index & 3]; |
| } else { |
| target << "[" << scalar_offset_index_unified_expr << " / 4][" |
| << scalar_offset_index_unified_expr << " % 4]"; |
| } |
| return true; |
| }; |
| auto load_u32 = [&] { return load_u32_to(out); }; |
| // Has a minimum alignment of 8 bytes, so is either .xy or .zw |
| auto load_vec2_u32_to = [&](utils::StringStream& target) { |
| if (scalar_offset_constant) { |
| target << buffer << "[" << (scalar_offset_index / 4) << "]" |
| << ((scalar_offset_index & 2) == 0 ? ".xy" : ".zw"); |
| } else { |
| std::string ubo_load = UniqueIdentifier("ubo_load"); |
| { |
| auto pre = line(); |
| pre << "uint4 " << ubo_load << " = " << buffer << "[" |
| << scalar_offset_index_unified_expr << " / 4];"; |
| } |
| target << "((" << scalar_offset_index_unified_expr << " & 2) ? " << ubo_load |
| << ".zw : " << ubo_load << ".xy)"; |
| } |
| return true; |
| }; |
| auto load_vec2_u32 = [&] { return load_vec2_u32_to(out); }; |
| // vec4 has a minimum alignment of 16 bytes, easiest case |
| auto load_vec4_u32 = [&] { |
| out << buffer; |
| if (scalar_offset_constant) { |
| out << "[" << (scalar_offset_index / 4) << "]"; |
| } else { |
| out << "[" << scalar_offset_index_unified_expr << " / 4]"; |
| } |
| return true; |
| }; |
| // vec3 has a minimum alignment of 16 bytes, so is just a .xyz swizzle |
| auto load_vec3_u32 = [&] { |
| if (!load_vec4_u32()) { |
| return false; |
| } |
| out << ".xyz"; |
| return true; |
| }; |
| auto load_scalar_f16 = [&] { |
| // offset bytes = 4k, ((buffer[index].x) & 0xFFFF) |
| // offset bytes = 4k+2, ((buffer[index].x >> 16) & 0xFFFF) |
| out << "float16_t(f16tof32(((" << buffer; |
| if (scalar_offset_constant) { |
| out << "[" << (scalar_offset_index / 4) << "]." |
| << swizzle[scalar_offset_index & 3]; |
| // WGSL spec ensure little endian memory layout. |
| if (scalar_offset_bytes % 4 == 0) { |
| out << ") & 0xFFFF)"; |
| } else { |
| out << " >> 16) & 0xFFFF)"; |
| } |
| } else { |
| out << "[" << scalar_offset_index_expr << " / 4][" << scalar_offset_index_expr |
| << " % 4] >> (" << scalar_offset_bytes_expr |
| << " % 4 == 0 ? 0 : 16)) & 0xFFFF)"; |
| } |
| out << "))"; |
| return true; |
| }; |
| auto load_vec2_f16 = [&] { |
| // vec2<f16> is aligned to 4 bytes |
| // Preclude code load the vec2<f16> data as a uint: |
| // uint ubo_load = buffer[id0][id1]; |
| // Loading code convert it to vec2<f16>: |
| // vector<float16_t, 2>(float16_t(f16tof32(ubo_load & 0xFFFF)), |
| // float16_t(f16tof32(ubo_load >> 16))) |
| std::string ubo_load = UniqueIdentifier("ubo_load"); |
| { |
| auto pre = line(); |
| // Load the 4 bytes f16 vector as an uint |
| pre << "uint " << ubo_load << " = "; |
| if (!load_u32_to(pre)) { |
| return false; |
| } |
| pre << ";"; |
| } |
| out << "vector<float16_t, 2>(float16_t(f16tof32(" << ubo_load |
| << " & 0xFFFF)), float16_t(f16tof32(" << ubo_load << " >> 16)))"; |
| return true; |
| }; |
| auto load_vec3_f16 = [&] { |
| // vec3<f16> is aligned to 8 bytes |
| // Preclude code load the vec3<f16> data as uint2 and convert its elements to |
| // float16_t: |
| // uint2 ubo_load = buffer[id0].xy; |
| // /* The low 8 bits of two uint are the x and z elements of vec3<f16> */ |
| // vector<float16_t> ubo_load_xz = vector<float16_t, 2>(f16tof32(ubo_load & |
| // 0xFFFF)); |
| // /* The high 8 bits of first uint is the y element of vec3<f16> */ |
| // float16_t ubo_load_y = f16tof32(ubo_load[0] >> 16); |
| // Loading code convert it to vec3<f16>: |
| // vector<float16_t, 3>(ubo_load_xz[0], ubo_load_y, ubo_load_xz[1]) |
| std::string ubo_load = UniqueIdentifier("ubo_load"); |
| std::string ubo_load_xz = UniqueIdentifier(ubo_load + "_xz"); |
| std::string ubo_load_y = UniqueIdentifier(ubo_load + "_y"); |
| { |
| auto pre = line(); |
| // Load the 8 bytes uint2 with the f16 vector at lower 6 bytes |
| pre << "uint2 " << ubo_load << " = "; |
| if (!load_vec2_u32_to(pre)) { |
| return false; |
| } |
| pre << ";"; |
| } |
| { |
| auto pre = line(); |
| pre << "vector<float16_t, 2> " << ubo_load_xz |
| << " = vector<float16_t, 2>(f16tof32(" << ubo_load << " & 0xFFFF));"; |
| } |
| { |
| auto pre = line(); |
| pre << "float16_t " << ubo_load_y << " = f16tof32(" << ubo_load |
| << "[0] >> 16);"; |
| } |
| out << "vector<float16_t, 3>(" << ubo_load_xz << "[0], " << ubo_load_y << ", " |
| << ubo_load_xz << "[1])"; |
| return true; |
| }; |
| auto load_vec4_f16 = [&] { |
| // vec4<f16> is aligned to 8 bytes |
| // Preclude code load the vec4<f16> data as uint2 and convert its elements to |
| // float16_t: |
| // uint2 ubo_load = buffer[id0].xy; |
| // /* The low 8 bits of two uint are the x and z elements of vec4<f16> */ |
| // vector<float16_t> ubo_load_xz = vector<float16_t, 2>(f16tof32(ubo_load & |
| // 0xFFFF)); |
| // /* The high 8 bits of two uint are the y and w elements of vec4<f16> */ |
| // vector<float16_t, 2> ubo_load_yw = vector<float16_t, 2>(f16tof32(ubo_load >> |
| // 16)); |
| // Loading code convert it to vec4<f16>: |
| // vector<float16_t, 4>(ubo_load_xz[0], ubo_load_yw[0], ubo_load_xz[1], |
| // ubo_load_yw[1]) |
| std::string ubo_load = UniqueIdentifier("ubo_load"); |
| std::string ubo_load_xz = UniqueIdentifier(ubo_load + "_xz"); |
| std::string ubo_load_yw = UniqueIdentifier(ubo_load + "_yw"); |
| { |
| auto pre = line(); |
| // Load the 8 bytes f16 vector as an uint2 |
| pre << "uint2 " << ubo_load << " = "; |
| if (!load_vec2_u32_to(pre)) { |
| return false; |
| } |
| pre << ";"; |
| } |
| { |
| auto pre = line(); |
| pre << "vector<float16_t, 2> " << ubo_load_xz |
| << " = vector<float16_t, 2>(f16tof32(" << ubo_load << " & 0xFFFF));"; |
| } |
| { |
| auto pre = line(); |
| pre << "vector<float16_t, 2> " << ubo_load_yw |
| << " = vector<float16_t, 2>(f16tof32(" << ubo_load << " >> 16));"; |
| } |
| out << "vector<float16_t, 4>(" << ubo_load_xz << "[0], " << ubo_load_yw << "[0], " |
| << ubo_load_xz << "[1], " << ubo_load_yw << "[1])"; |
| return true; |
| }; |
| switch (intrinsic->type) { |
| case DataType::kU32: |
| return load_u32(); |
| case DataType::kF32: |
| return cast("asfloat", load_u32); |
| case DataType::kI32: |
| return cast("asint", load_u32); |
| case DataType::kF16: |
| return load_scalar_f16(); |
| case DataType::kVec2U32: |
| return load_vec2_u32(); |
| case DataType::kVec2F32: |
| return cast("asfloat", load_vec2_u32); |
| case DataType::kVec2I32: |
| return cast("asint", load_vec2_u32); |
| case DataType::kVec2F16: |
| return load_vec2_f16(); |
| case DataType::kVec3U32: |
| return load_vec3_u32(); |
| case DataType::kVec3F32: |
| return cast("asfloat", load_vec3_u32); |
| case DataType::kVec3I32: |
| return cast("asint", load_vec3_u32); |
| case DataType::kVec3F16: |
| return load_vec3_f16(); |
| case DataType::kVec4U32: |
| return load_vec4_u32(); |
| case DataType::kVec4F32: |
| return cast("asfloat", load_vec4_u32); |
| case DataType::kVec4I32: |
| return cast("asint", load_vec4_u32); |
| case DataType::kVec4F16: |
| return load_vec4_f16(); |
| } |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "unsupported DecomposeMemoryAccess::Intrinsic::DataType: " |
| << static_cast<int>(intrinsic->type); |
| return false; |
| } |
| default: |
| break; |
| } |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "unsupported DecomposeMemoryAccess::Intrinsic::Op: " << static_cast<int>(intrinsic->op); |
| return false; |
| } |
| |
| bool GeneratorImpl::EmitStorageBufferAccess( |
| utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const ast::transform::DecomposeMemoryAccess::Intrinsic* intrinsic) { |
| auto const buffer = intrinsic->Buffer()->identifier->symbol.Name(); |
| auto* const offset = expr->args[0]; |
| auto* const value = expr->args[1]; |
| |
| using Op = ast::transform::DecomposeMemoryAccess::Intrinsic::Op; |
| using DataType = ast::transform::DecomposeMemoryAccess::Intrinsic::DataType; |
| switch (intrinsic->op) { |
| case Op::kLoad: { |
| auto load = [&](const char* cast, int n) { |
| if (cast) { |
| out << cast << "("; |
| } |
| out << buffer << ".Load"; |
| if (n > 1) { |
| out << n; |
| } |
| ScopedParen sp(out); |
| if (!EmitExpression(out, offset)) { |
| return false; |
| } |
| if (cast) { |
| out << ")"; |
| } |
| return true; |
| }; |
| // Templated load used for f16 types, requires SM6.2 or higher and DXC |
| // Used by loading f16 types, e.g. for f16 type, set type parameter to "float16_t" |
| // to emit `buffer.Load<float16_t>(offset)`. |
| auto templated_load = [&](const char* type) { |
| out << buffer << ".Load<" << type << ">"; // templated load |
| ScopedParen sp(out); |
| if (!EmitExpression(out, offset)) { |
| return false; |
| } |
| return true; |
| }; |
| switch (intrinsic->type) { |
| case DataType::kU32: |
| return load(nullptr, 1); |
| case DataType::kF32: |
| return load("asfloat", 1); |
| case DataType::kI32: |
| return load("asint", 1); |
| case DataType::kF16: |
| return templated_load("float16_t"); |
| case DataType::kVec2U32: |
| return load(nullptr, 2); |
| case DataType::kVec2F32: |
| return load("asfloat", 2); |
| case DataType::kVec2I32: |
| return load("asint", 2); |
| case DataType::kVec2F16: |
| return templated_load("vector<float16_t, 2> "); |
| case DataType::kVec3U32: |
| return load(nullptr, 3); |
| case DataType::kVec3F32: |
| return load("asfloat", 3); |
| case DataType::kVec3I32: |
| return load("asint", 3); |
| case DataType::kVec3F16: |
| return templated_load("vector<float16_t, 3> "); |
| case DataType::kVec4U32: |
| return load(nullptr, 4); |
| case DataType::kVec4F32: |
| return load("asfloat", 4); |
| case DataType::kVec4I32: |
| return load("asint", 4); |
| case DataType::kVec4F16: |
| return templated_load("vector<float16_t, 4> "); |
| } |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "unsupported DecomposeMemoryAccess::Intrinsic::DataType: " |
| << static_cast<int>(intrinsic->type); |
| return false; |
| } |
| |
| case Op::kStore: { |
| auto store = [&](int n) { |
| out << buffer << ".Store"; |
| if (n > 1) { |
| out << n; |
| } |
| ScopedParen sp1(out); |
| if (!EmitExpression(out, offset)) { |
| return false; |
| } |
| out << ", asuint"; |
| ScopedParen sp2(out); |
| if (!EmitExpression(out, value)) { |
| return false; |
| } |
| return true; |
| }; |
| // Templated stored used for f16 types, requires SM6.2 or higher and DXC |
| // Used by storing f16 types, e.g. for f16 type, set type parameter to "float16_t" |
| // to emit `buffer.Store<float16_t>(offset)`. |
| auto templated_store = [&](const char* type) { |
| out << buffer << ".Store<" << type << ">"; // templated store |
| ScopedParen sp1(out); |
| if (!EmitExpression(out, offset)) { |
| return false; |
| } |
| out << ", "; |
| if (!EmitExpression(out, value)) { |
| return false; |
| } |
| return true; |
| }; |
| switch (intrinsic->type) { |
| case DataType::kU32: |
| return store(1); |
| case DataType::kF32: |
| return store(1); |
| case DataType::kI32: |
| return store(1); |
| case DataType::kF16: |
| return templated_store("float16_t"); |
| case DataType::kVec2U32: |
| return store(2); |
| case DataType::kVec2F32: |
| return store(2); |
| case DataType::kVec2I32: |
| return store(2); |
| case DataType::kVec2F16: |
| return templated_store("vector<float16_t, 2> "); |
| case DataType::kVec3U32: |
| return store(3); |
| case DataType::kVec3F32: |
| return store(3); |
| case DataType::kVec3I32: |
| return store(3); |
| case DataType::kVec3F16: |
| return templated_store("vector<float16_t, 3> "); |
| case DataType::kVec4U32: |
| return store(4); |
| case DataType::kVec4F32: |
| return store(4); |
| case DataType::kVec4I32: |
| return store(4); |
| case DataType::kVec4F16: |
| return templated_store("vector<float16_t, 4> "); |
| } |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "unsupported DecomposeMemoryAccess::Intrinsic::DataType: " |
| << static_cast<int>(intrinsic->type); |
| return false; |
| } |
| default: |
| // Break out to error case below |
| // Note that atomic intrinsics are generated as functions. |
| break; |
| } |
| |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "unsupported DecomposeMemoryAccess::Intrinsic::Op: " << static_cast<int>(intrinsic->op); |
| return false; |
| } |
| |
| bool GeneratorImpl::EmitStorageAtomicIntrinsic( |
| const ast::Function* func, |
| const ast::transform::DecomposeMemoryAccess::Intrinsic* intrinsic) { |
| using Op = ast::transform::DecomposeMemoryAccess::Intrinsic::Op; |
| |
| const sem::Function* sem_func = builder_.Sem().Get(func); |
| auto* result_ty = sem_func->ReturnType(); |
| const auto name = func->name->symbol.Name(); |
| auto& buf = *current_buffer_; |
| |
| auto const buffer = intrinsic->Buffer()->identifier->symbol.Name(); |
| |
| auto rmw = [&](const char* hlsl) -> bool { |
| { |
| auto fn = line(&buf); |
| if (!EmitTypeAndName(fn, result_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, name)) { |
| return false; |
| } |
| fn << "(uint offset, "; |
| if (!EmitTypeAndName(fn, result_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "value")) { |
| return false; |
| } |
| fn << ") {"; |
| } |
| |
| buf.IncrementIndent(); |
| TINT_DEFER({ |
| buf.DecrementIndent(); |
| line(&buf) << "}"; |
| line(&buf); |
| }); |
| |
| { |
| auto l = line(&buf); |
| if (!EmitTypeAndName(l, result_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "original_value")) { |
| return false; |
| } |
| l << " = 0;"; |
| } |
| { |
| auto l = line(&buf); |
| l << buffer << "." << hlsl << "(offset, "; |
| if (intrinsic->op == Op::kAtomicSub) { |
| l << "-"; |
| } |
| l << "value, original_value);"; |
| } |
| line(&buf) << "return original_value;"; |
| return true; |
| }; |
| |
| switch (intrinsic->op) { |
| case Op::kAtomicAdd: |
| return rmw("InterlockedAdd"); |
| |
| case Op::kAtomicSub: |
| // Use add with the operand negated. |
| return rmw("InterlockedAdd"); |
| |
| case Op::kAtomicMax: |
| return rmw("InterlockedMax"); |
| |
| case Op::kAtomicMin: |
| return rmw("InterlockedMin"); |
| |
| case Op::kAtomicAnd: |
| return rmw("InterlockedAnd"); |
| |
| case Op::kAtomicOr: |
| return rmw("InterlockedOr"); |
| |
| case Op::kAtomicXor: |
| return rmw("InterlockedXor"); |
| |
| case Op::kAtomicExchange: |
| return rmw("InterlockedExchange"); |
| |
| case Op::kAtomicLoad: { |
| // HLSL does not have an InterlockedLoad, so we emulate it with |
| // InterlockedOr using 0 as the OR value |
| { |
| auto fn = line(&buf); |
| if (!EmitTypeAndName(fn, result_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, name)) { |
| return false; |
| } |
| fn << "(uint offset) {"; |
| } |
| |
| buf.IncrementIndent(); |
| TINT_DEFER({ |
| buf.DecrementIndent(); |
| line(&buf) << "}"; |
| line(&buf); |
| }); |
| |
| { |
| auto l = line(&buf); |
| if (!EmitTypeAndName(l, result_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "value")) { |
| return false; |
| } |
| l << " = 0;"; |
| } |
| |
| line(&buf) << buffer << ".InterlockedOr(offset, 0, value);"; |
| line(&buf) << "return value;"; |
| return true; |
| } |
| case Op::kAtomicStore: { |
| auto* const value_ty = sem_func->Parameters()[1]->Type()->UnwrapRef(); |
| // HLSL does not have an InterlockedStore, so we emulate it with |
| // InterlockedExchange and discard the returned value |
| { |
| auto fn = line(&buf); |
| fn << "void " << name << "(uint offset, "; |
| if (!EmitTypeAndName(fn, value_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "value")) { |
| return false; |
| } |
| fn << ") {"; |
| } |
| |
| buf.IncrementIndent(); |
| TINT_DEFER({ |
| buf.DecrementIndent(); |
| line(&buf) << "}"; |
| line(&buf); |
| }); |
| |
| { |
| auto l = line(&buf); |
| if (!EmitTypeAndName(l, value_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "ignored")) { |
| return false; |
| } |
| l << ";"; |
| } |
| line(&buf) << buffer << ".InterlockedExchange(offset, value, ignored);"; |
| return true; |
| } |
| case Op::kAtomicCompareExchangeWeak: { |
| auto* const value_ty = sem_func->Parameters()[1]->Type()->UnwrapRef(); |
| // NOTE: We don't need to emit the return type struct here as DecomposeMemoryAccess |
| // already added it to the AST, and it should have already been emitted by now. |
| { |
| auto fn = line(&buf); |
| if (!EmitTypeAndName(fn, result_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, name)) { |
| return false; |
| } |
| fn << "(uint offset, "; |
| if (!EmitTypeAndName(fn, value_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "compare")) { |
| return false; |
| } |
| fn << ", "; |
| if (!EmitTypeAndName(fn, value_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "value")) { |
| return false; |
| } |
| fn << ") {"; |
| } |
| |
| buf.IncrementIndent(); |
| TINT_DEFER({ |
| buf.DecrementIndent(); |
| line(&buf) << "}"; |
| line(&buf); |
| }); |
| |
| { // T result = {0}; |
| auto l = line(&buf); |
| if (!EmitTypeAndName(l, result_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "result")) { |
| return false; |
| } |
| l << "="; |
| if (!EmitZeroValue(l, result_ty)) { |
| return false; |
| } |
| l << ";"; |
| } |
| |
| line(&buf) << buffer |
| << ".InterlockedCompareExchange(offset, compare, value, result.old_value);"; |
| line(&buf) << "result.exchanged = result.old_value == compare;"; |
| line(&buf) << "return result;"; |
| |
| return true; |
| } |
| default: |
| break; |
| } |
| |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "unsupported atomic DecomposeMemoryAccess::Intrinsic::Op: " |
| << static_cast<int>(intrinsic->op); |
| return false; |
| } |
| |
| bool GeneratorImpl::EmitWorkgroupAtomicCall(utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const sem::Builtin* builtin) { |
| std::string result = UniqueIdentifier("atomic_result"); |
| |
| if (!builtin->ReturnType()->Is<type::Void>()) { |
| auto pre = line(); |
| if (!EmitTypeAndName(pre, builtin->ReturnType(), builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, result)) { |
| return false; |
| } |
| pre << " = "; |
| if (!EmitZeroValue(pre, builtin->ReturnType())) { |
| return false; |
| } |
| pre << ";"; |
| } |
| |
| auto call = [&](const char* name) { |
| auto pre = line(); |
| pre << name; |
| |
| { |
| ScopedParen sp(pre); |
| for (size_t i = 0; i < expr->args.Length(); i++) { |
| auto* arg = expr->args[i]; |
| if (i > 0) { |
| pre << ", "; |
| } |
| if (i == 1 && builtin->Type() == builtin::Function::kAtomicSub) { |
| // Sub uses InterlockedAdd with the operand negated. |
| pre << "-"; |
| } |
| if (!EmitExpression(pre, arg)) { |
| return false; |
| } |
| } |
| |
| pre << ", " << result; |
| } |
| |
| pre << ";"; |
| |
| out << result; |
| return true; |
| }; |
| |
| switch (builtin->Type()) { |
| case builtin::Function::kAtomicLoad: { |
| // HLSL does not have an InterlockedLoad, so we emulate it with |
| // InterlockedOr using 0 as the OR value |
| auto pre = line(); |
| pre << "InterlockedOr"; |
| { |
| ScopedParen sp(pre); |
| if (!EmitExpression(pre, expr->args[0])) { |
| return false; |
| } |
| pre << ", 0, " << result; |
| } |
| pre << ";"; |
| |
| out << result; |
| return true; |
| } |
| case builtin::Function::kAtomicStore: { |
| // HLSL does not have an InterlockedStore, so we emulate it with |
| // InterlockedExchange and discard the returned value |
| { // T result = 0; |
| auto pre = line(); |
| auto* value_ty = builtin->Parameters()[1]->Type()->UnwrapRef(); |
| if (!EmitTypeAndName(pre, value_ty, builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, result)) { |
| return false; |
| } |
| pre << " = "; |
| if (!EmitZeroValue(pre, value_ty)) { |
| return false; |
| } |
| pre << ";"; |
| } |
| |
| out << "InterlockedExchange"; |
| { |
| ScopedParen sp(out); |
| if (!EmitExpression(out, expr->args[0])) { |
| return false; |
| } |
| out << ", "; |
| if (!EmitExpression(out, expr->args[1])) { |
| return false; |
| } |
| out << ", " << result; |
| } |
| return true; |
| } |
| case builtin::Function::kAtomicCompareExchangeWeak: { |
| if (!EmitStructType(&helpers_, builtin->ReturnType()->As<type::Struct>())) { |
| return false; |
| } |
| |
| auto* dest = expr->args[0]; |
| auto* compare_value = expr->args[1]; |
| auto* value = expr->args[2]; |
| |
| std::string compare = UniqueIdentifier("atomic_compare_value"); |
| |
| { // T compare_value = <compare_value>; |
| auto pre = line(); |
| if (!EmitTypeAndName(pre, TypeOf(compare_value)->UnwrapRef(), |
| builtin::AddressSpace::kUndefined, builtin::Access::kUndefined, |
| compare)) { |
| return false; |
| } |
| pre << " = "; |
| if (!EmitExpression(pre, compare_value)) { |
| return false; |
| } |
| pre << ";"; |
| } |
| |
| { // InterlockedCompareExchange(dst, compare, value, result.old_value); |
| auto pre = line(); |
| pre << "InterlockedCompareExchange"; |
| { |
| ScopedParen sp(pre); |
| if (!EmitExpression(pre, dest)) { |
| return false; |
| } |
| pre << ", " << compare << ", "; |
| if (!EmitExpression(pre, value)) { |
| return false; |
| } |
| pre << ", " << result << ".old_value"; |
| } |
| pre << ";"; |
| } |
| |
| // result.exchanged = result.old_value == compare; |
| line() << result << ".exchanged = " << result << ".old_value == " << compare << ";"; |
| |
| out << result; |
| return true; |
| } |
| |
| case builtin::Function::kAtomicAdd: |
| case builtin::Function::kAtomicSub: |
| return call("InterlockedAdd"); |
| |
| case builtin::Function::kAtomicMax: |
| return call("InterlockedMax"); |
| |
| case builtin::Function::kAtomicMin: |
| return call("InterlockedMin"); |
| |
| case builtin::Function::kAtomicAnd: |
| return call("InterlockedAnd"); |
| |
| case builtin::Function::kAtomicOr: |
| return call("InterlockedOr"); |
| |
| case builtin::Function::kAtomicXor: |
| return call("InterlockedXor"); |
| |
| case builtin::Function::kAtomicExchange: |
| return call("InterlockedExchange"); |
| |
| default: |
| break; |
| } |
| |
| TINT_UNREACHABLE(Writer, diagnostics_) << "unsupported atomic builtin: " << builtin->Type(); |
| return false; |
| } |
| |
| bool GeneratorImpl::EmitSelectCall(utils::StringStream& out, const ast::CallExpression* expr) { |
| auto* expr_false = expr->args[0]; |
| auto* expr_true = expr->args[1]; |
| auto* expr_cond = expr->args[2]; |
| ScopedParen paren(out); |
| if (!EmitExpression(out, expr_cond)) { |
| return false; |
| } |
| |
| out << " ? "; |
| |
| if (!EmitExpression(out, expr_true)) { |
| return false; |
| } |
| |
| out << " : "; |
| |
| if (!EmitExpression(out, expr_false)) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitModfCall(utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const sem::Builtin* builtin) { |
| return CallBuiltinHelper( |
| out, expr, builtin, [&](TextBuffer* b, const std::vector<std::string>& params) { |
| auto* ty = builtin->Parameters()[0]->Type(); |
| auto in = params[0]; |
| |
| std::string width; |
| if (auto* vec = ty->As<type::Vector>()) { |
| width = std::to_string(vec->Width()); |
| } |
| |
| // Emit the builtin return type unique to this overload. This does not |
| // exist in the AST, so it will not be generated in Generate(). |
| if (!EmitStructType(&helpers_, builtin->ReturnType()->As<type::Struct>())) { |
| return false; |
| } |
| |
| { |
| auto l = line(b); |
| if (!EmitType(l, builtin->ReturnType(), builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "")) { |
| return false; |
| } |
| l << " result;"; |
| } |
| line(b) << "result.fract = modf(" << params[0] << ", result.whole);"; |
| line(b) << "return result;"; |
| return true; |
| }); |
| } |
| |
| bool GeneratorImpl::EmitFrexpCall(utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const sem::Builtin* builtin) { |
| return CallBuiltinHelper( |
| out, expr, builtin, [&](TextBuffer* b, const std::vector<std::string>& params) { |
| auto* ty = builtin->Parameters()[0]->Type(); |
| auto in = params[0]; |
| |
| std::string width; |
| if (auto* vec = ty->As<type::Vector>()) { |
| width = std::to_string(vec->Width()); |
| } |
| |
| // Emit the builtin return type unique to this overload. This does not |
| // exist in the AST, so it will not be generated in Generate(). |
| if (!EmitStructType(&helpers_, builtin->ReturnType()->As<type::Struct>())) { |
| return false; |
| } |
| |
| std::string member_type; |
| if (Is<type::F16>(ty->DeepestElement())) { |
| member_type = width.empty() ? "float16_t" : ("vector<float16_t, " + width + ">"); |
| } else { |
| member_type = "float" + width; |
| } |
| |
| line(b) << member_type << " exp;"; |
| line(b) << member_type << " fract = sign(" << in << ") * frexp(" << in << ", exp);"; |
| { |
| auto l = line(b); |
| if (!EmitType(l, builtin->ReturnType(), builtin::AddressSpace::kUndefined, |
| builtin::Access::kUndefined, "")) { |
| return false; |
| } |
| l << " result = {fract, int" << width << "(exp)};"; |
| } |
| line(b) << "return result;"; |
| return true; |
| }); |
| } |
| |
| bool GeneratorImpl::EmitDegreesCall(utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const sem::Builtin* builtin) { |
| return CallBuiltinHelper(out, expr, builtin, |
| [&](TextBuffer* b, const std::vector<std::string>& params) { |
| line(b) << "return " << params[0] << " * " << std::setprecision(20) |
| << sem::kRadToDeg << ";"; |
| return true; |
| }); |
| } |
| |
| bool GeneratorImpl::EmitRadiansCall(utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const sem::Builtin* builtin) { |
| return CallBuiltinHelper(out, expr, builtin, |
| [&](TextBuffer* b, const std::vector<std::string>& params) { |
| line(b) << "return " << params[0] << " * " << std::setprecision(20) |
| << sem::kDegToRad << ";"; |
| return true; |
| }); |
| } |
| |
| // The HLSL `sign` method always returns an `int` result (scalar or vector). In WGSL the result is |
| // expected to be the same type as the argument. This injects a cast to the expected WGSL result |
| // type after the call to `sign`. |
| bool GeneratorImpl::EmitSignCall(utils::StringStream& out, |
| const sem::Call* call, |
| const sem::Builtin*) { |
| auto* arg = call->Arguments()[0]; |
| if (!EmitType(out, arg->Type(), builtin::AddressSpace::kUndefined, builtin::Access::kReadWrite, |
| "")) { |
| return false; |
| } |
| out << "(sign("; |
| if (!EmitExpression(out, arg->Declaration())) { |
| return false; |
| } |
| out << "))"; |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitQuantizeToF16Call(utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const sem::Builtin* builtin) { |
| // Cast to f16 and back |
| std::string width; |
| if (auto* vec = builtin->ReturnType()->As<type::Vector>()) { |
| width = std::to_string(vec->Width()); |
| } |
| out << "f16tof32(f32tof16" |
| << "("; |
| if (!EmitExpression(out, expr->args[0])) { |
| return false; |
| } |
| out << "))"; |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitTruncCall(utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const sem::Builtin* builtin) { |
| // HLSL's trunc is broken for very large/small float values. |
| // See crbug.com/tint/1883 |
| return CallBuiltinHelper( // |
| out, expr, builtin, [&](TextBuffer* b, const std::vector<std::string>& params) { |
| // value < 0 ? ceil(value) : floor(value) |
| line(b) << "return " << params[0] << " < 0 ? ceil(" << params[0] << ") : floor(" |
| << params[0] << ");"; |
| return true; |
| }); |
| } |
| |
| bool GeneratorImpl::EmitDataPackingCall(utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const sem::Builtin* builtin) { |
| return CallBuiltinHelper( |
| out, expr, builtin, [&](TextBuffer* b, const std::vector<std::string>& params) { |
| uint32_t dims = 2; |
| bool is_signed = false; |
| uint32_t scale = 65535; |
| if (builtin->Type() == builtin::Function::kPack4X8Snorm || |
| builtin->Type() == builtin::Function::kPack4X8Unorm) { |
| dims = 4; |
| scale = 255; |
| } |
| if (builtin->Type() == builtin::Function::kPack4X8Snorm || |
| builtin->Type() == builtin::Function::kPack2X16Snorm) { |
| is_signed = true; |
| scale = (scale - 1) / 2; |
| } |
| switch (builtin->Type()) { |
| case builtin::Function::kPack4X8Snorm: |
| case builtin::Function::kPack4X8Unorm: |
| case builtin::Function::kPack2X16Snorm: |
| case builtin::Function::kPack2X16Unorm: { |
| { |
| auto l = line(b); |
| l << (is_signed ? "" : "u") << "int" << dims |
| << " i = " << (is_signed ? "" : "u") << "int" << dims << "(round(clamp(" |
| << params[0] << ", " << (is_signed ? "-1.0" : "0.0") << ", 1.0) * " |
| << scale << ".0))"; |
| if (is_signed) { |
| l << " & " << (dims == 4 ? "0xff" : "0xffff"); |
| } |
| l << ";"; |
| } |
| { |
| auto l = line(b); |
| l << "return "; |
| if (is_signed) { |
| l << "asuint"; |
| } |
| l << "(i.x | i.y << " << (32 / dims); |
| if (dims == 4) { |
| l << " | i.z << 16 | i.w << 24"; |
| } |
| l << ");"; |
| } |
| break; |
| } |
| case builtin::Function::kPack2X16Float: { |
| line(b) << "uint2 i = f32tof16(" << params[0] << ");"; |
| line(b) << "return i.x | (i.y << 16);"; |
| break; |
| } |
| default: |
| diagnostics_.add_error(diag::System::Writer, |
| "Internal error: unhandled data packing builtin"); |
| return false; |
| } |
| |
| return true; |
| }); |
| } |
| |
| bool GeneratorImpl::EmitDataUnpackingCall(utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const sem::Builtin* builtin) { |
| return CallBuiltinHelper( |
| out, expr, builtin, [&](TextBuffer* b, const std::vector<std::string>& params) { |
| uint32_t dims = 2; |
| bool is_signed = false; |
| uint32_t scale = 65535; |
| if (builtin->Type() == builtin::Function::kUnpack4X8Snorm || |
| builtin->Type() == builtin::Function::kUnpack4X8Unorm) { |
| dims = 4; |
| scale = 255; |
| } |
| if (builtin->Type() == builtin::Function::kUnpack4X8Snorm || |
| builtin->Type() == builtin::Function::kUnpack2X16Snorm) { |
| is_signed = true; |
| scale = (scale - 1) / 2; |
| } |
| switch (builtin->Type()) { |
| case builtin::Function::kUnpack4X8Snorm: |
| case builtin::Function::kUnpack2X16Snorm: { |
| line(b) << "int j = int(" << params[0] << ");"; |
| { // Perform sign extension on the converted values. |
| auto l = line(b); |
| l << "int" << dims << " i = int" << dims << "("; |
| if (dims == 2) { |
| l << "j << 16, j) >> 16"; |
| } else { |
| l << "j << 24, j << 16, j << 8, j) >> 24"; |
| } |
| l << ";"; |
| } |
| line(b) << "return clamp(float" << dims << "(i) / " << scale << ".0, " |
| << (is_signed ? "-1.0" : "0.0") << ", 1.0);"; |
| break; |
| } |
| case builtin::Function::kUnpack4X8Unorm: |
| case builtin::Function::kUnpack2X16Unorm: { |
| line(b) << "uint j = " << params[0] << ";"; |
| { |
| auto l = line(b); |
| l << "uint" << dims << " i = uint" << dims << "("; |
| l << "j & " << (dims == 2 ? "0xffff" : "0xff") << ", "; |
| if (dims == 4) { |
| l << "(j >> " << (32 / dims) << ") & 0xff, (j >> 16) & 0xff, j >> 24"; |
| } else { |
| l << "j >> " << (32 / dims); |
| } |
| l << ");"; |
| } |
| line(b) << "return float" << dims << "(i) / " << scale << ".0;"; |
| break; |
| } |
| case builtin::Function::kUnpack2X16Float: |
| line(b) << "uint i = " << params[0] << ";"; |
| line(b) << "return f16tof32(uint2(i & 0xffff, i >> 16));"; |
| break; |
| default: |
| diagnostics_.add_error(diag::System::Writer, |
| "Internal error: unhandled data packing builtin"); |
| return false; |
| } |
| |
| return true; |
| }); |
| } |
| |
| bool GeneratorImpl::EmitDP4aCall(utils::StringStream& out, |
| const ast::CallExpression* expr, |
| const sem::Builtin* builtin) { |
| // TODO(crbug.com/tint/1497): support the polyfill version of DP4a functions. |
| return CallBuiltinHelper( |
| out, expr, builtin, [&](TextBuffer* b, const std::vector<std::string>& params) { |
| std::string functionName; |
| switch (builtin->Type()) { |
| case builtin::Function::kDot4I8Packed: |
| line(b) << "int accumulator = 0;"; |
| functionName = "dot4add_i8packed"; |
| break; |
| case builtin::Function::kDot4U8Packed: |
| line(b) << "uint accumulator = 0u;"; |
| functionName = "dot4add_u8packed"; |
| break; |
| default: |
| diagnostics_.add_error(diag::System::Writer, |
| "Internal error: unhandled DP4a builtin"); |
| return false; |
| } |
| line(b) << "return " << functionName << "(" << params[0] << ", " << params[1] |
| << ", accumulator);"; |
| |
| return true; |
| }); |
| } |
| |
| bool GeneratorImpl::EmitBarrierCall(utils::StringStream& out, const sem::Builtin* builtin) { |
| // TODO(crbug.com/tint/661): Combine sequential barriers to a single |
| // instruction. |
| if (builtin->Type() == builtin::Function::kWorkgroupBarrier) { |
| out << "GroupMemoryBarrierWithGroupSync()"; |
| } else if (builtin->Type() == builtin::Function::kStorageBarrier) { |
| out << "DeviceMemoryBarrierWithGroupSync()"; |
| } else { |
| TINT_UNREACHABLE(Writer, diagnostics_) |
| << "unexpected barrier builtin type " << builtin::str(builtin->Type()); |
| return false; |
| } |
| return true; |
| } |
| |
| bool GeneratorImpl::EmitTextureCall(utils::StringStream& out, |
| const sem::Call* call, |
| const sem::Builtin* builtin) { |
| using Usage = sem::ParameterUsage; |
| |
| auto& signature = builtin->Signature(); |
| auto* expr = call->Declaration(); |
| auto arguments = expr->args; |
| |
| // Returns the argument with the given usage |
| auto arg = [&](Usage usage) { |
| int idx = signature.IndexOf(usage); |
| return (idx >= 0) ? arguments[static_cast<size_t>(idx)] : nullptr; |
| }; |
| |
| auto* texture = arg(Usage::kTexture); |
| if (TINT_UNLIKELY(!texture)) { |
| TINT_ICE(Writer, diagnostics_) << "missing texture argument"; |
| return false; |
| } |
| |
| auto* texture_type = TypeOf(texture)->UnwrapRef()->As<type::Texture>(); |
| |
| switch (builtin->Type()) { |
| case builtin::Function::kTextureDimensions: |
| case builtin::Function::kTextureNumLayers: |
| case builtin::Function::kTextureNumLevels: |
| case builtin::Function::kTextureNumSamples: { |
| // All of these builtins use the GetDimensions() method on the texture |
| bool is_ms = |
| texture_type->IsAnyOf<type::MultisampledTexture, type::DepthMultisampledTexture>(); |
| int num_dimensions = 0; |
| std::string swizzle; |
| |
| switch (builtin->Type()) { |
| case builtin::Function::kTextureDimensions: |
| switch (texture_type->dim()) { |
| case type::TextureDimension::kNone: |
| TINT_ICE(Writer, diagnostics_) << "texture dimension is kNone"; |
| return false; |
| case type::TextureDimension::k1d: |
| num_dimensions = 1; |
| break; |
| case type::TextureDimension::k2d: |
| num_dimensions = is_ms ? 3 : 2; |
| swizzle = is_ms ? ".xy" : ""; |
| break; |
| case type::TextureDimension::k2dArray: |
| num_dimensions = is_ms ? 4 : 3; |
| swizzle = ".xy"; |
| break; |
| case type::TextureDimension::k3d: |
| num_dimensions = 3; |
| break; |
| case type::TextureDimension::kCube: |
| num_dimensions = 2; |
| break; |
| case type::TextureDimension::kCubeArray: |
| num_dimensions = 3; |
| swizzle = ".xy"; |
| break; |
| } |
| break; |
| case builtin::Function::kTextureNumLayers: |
| switch (texture_type->dim()) { |
| default: |
| TINT_ICE(Writer, diagnostics_) << "texture dimension is not arrayed"; |
| return false; |
| case type::TextureDimension::k2dArray: |
| num_dimensions = is_ms ? 4 : 3; |
| swizzle = ".z"; |
| break; |
| case type::TextureDimension::kCubeArray: |
| num_dimensions = 3; |
| swizzle = ".z"; |
| break; |
| } |
| break; |
| case builtin::Function::kTextureNumLevels: |
| switch (texture_type->dim()) { |
| default: |
| TINT_ICE(Writer, diagnostics_) |
| << "texture dimension does not support mips"; |
| return false; |
| case type::TextureDimension::k1d: |
| num_dimensions = 2; |
| swizzle = ".y"; |
| break; |
| case type::TextureDimension::k2d: |
| case type::TextureDimension::kCube: |
| num_dimensions = 3; |
| swizzle = ".z"; |
| break; |
| case type::TextureDimension::k2dArray: |
| case type::TextureDimension::k3d: |
| case type::TextureDimension::kCubeArray: |
| num_dimensions = 4; |
| swizzle = ".w"; |
| break; |
| } |
| break; |
| case builtin::Function::kTextureNumSamples: |
| switch (texture_type->dim()) { |
| default: |
| TINT_ICE(Writer, diagnostics_) |
| << "texture dimension does not support multisampling"; |
| return false; |
| case type::TextureDimension::k2d: |
| num_dimensions = 3; |
| swizzle = ".z"; |
| break; |
| case type::TextureDimension::k2dArray: |
| num_dimensions = 4; |
| swizzle = ".w"; |
| break; |
| } |
| break; |
| default: |
| TINT_ICE(Writer, diagnostics_) << "unexpected builtin"; |
| return false; |
| } |
| |
| auto* level_arg = arg(Usage::kLevel); |
| |
| if (level_arg) { |
| // `NumberOfLevels` is a non-optional argument if `MipLevel` was passed. |
| // Increment the number of dimensions for the temporary vector to |
| // accommodate this. |
| num_dimensions++; |
| |
| // If the swizzle was empty, the expression will evaluate to the whole |
| // vector. As we've grown the vector by one element, we now need to |
| // swizzle to keep the result expression equivalent. |
| if (swizzle.empty()) { |
| static constexpr const char* swizzles[] = {"", ".x", ".xy", ".xyz"}; |
| swizzle = swizzles[num_dimensions - 1]; |
| } |
| } |
| |
| if (TINT_UNLIKELY(num_dimensions > 4)) { |
| TINT_ICE(Writer, diagnostics_) << "Texture query builtin temporary vector has " |
| << num_dimensions << " dimensions"; |
| return false; |
| } |
| |
| // Declare a variable to hold the queried texture info |
| auto dims = UniqueIdentifier(kTempNamePrefix); |
| if (num_dimensions == 1) { |
| line() << "uint " << dims << ";"; |
| } else { |
| line() << "uint" << num_dimensions << " " << dims << ";"; |
| } |
| |
| { // texture.GetDimensions(...) |
| auto pre = line(); |
| if (!EmitExpression(pre, texture)) { |
| return false; |
| } |
| pre << ".GetDimensions("; |
| |
| if (level_arg) { |
| if (!EmitExpression(pre, level_arg)) { |
| return false; |
| } |
| pre << ", "; |
| } else if (builtin->Type() == builtin::Function::kTextureNumLevels) { |
| pre << "0, "; |
| } |
| |
| if (num_dimensions == 1) { |
| pre << dims; |
| } else { |
| static constexpr char xyzw[] = {'x', 'y', 'z', 'w'}; |
| if (TINT_UNLIKELY(num_dimensions < 0 || num_dimensions > 4)) { |
| TINT_ICE(Writer, diagnostics_) |
| << "vector dimensions are " << num_dimensions; |
| return false; |
| } |
| for (int i = 0; i < num_dimensions; i++) { |
| if (i > 0) { |
| pre << ", "; |
| } |
| pre << dims << "." << xyzw[i]; |
| } |
| } |
| |
| pre << ");"; |
| } |
| |
| // The out parameters of the GetDimensions() call is now in temporary |
| // `dims` variable. This may be packed with other data, so the final |
| // expression may require a swizzle. |
| out << dims << swizzle; |
| return true; |
| } |
| default: |
| break; |
| } |
| |
| if (!EmitExpression(out, texture)) { |
| return false; |
| } |
| |
| // If pack_level_in_coords is true, then the mip level will be appended as the |
| // last value of the coordinates argument. If the WGSL builtin overload does |
| // not have a level parameter and pack_level_in_coords is true, then a zero |
| // mip level will be inserted. |
| bool pack_level_in_coords = false; |
| |
| uint32_t hlsl_ret_width = 4u; |
| |
| switch (builtin->Type()) { |
| case builtin::Function::kTextureSample: |
| out << ".Sample("; |
| break; |
| case builtin::Function::kTextureSampleBias: |
| out << ".SampleBias("; |
| break; |
| case builtin::Function::kTextureSampleLevel: |
| out << ".SampleLevel("; |
| break; |
| case builtin::Function::kTextureSampleGrad: |
| out << ".SampleGrad("; |
| break; |
| case builtin::Function::kTextureSampleCompare: |
| out << ".SampleCmp("; |
| hlsl_ret_width = 1; |
| break; |
| case builtin::Function::kTextureSampleCompareLevel: |
| out << ".SampleCmpLevelZero("; |
| hlsl_ret_width = 1; |
| break; |
| case builtin::Function::kTextureLoad: |
| out << ".Load("; |
| // Multisampled textures do not support mip-levels. |
| if (!texture_type->Is<type::MultisampledTexture>()) { |
| pack_level_in_coords = true; |
| } |
| break; |
| case builtin::Function::kTextureGather: |
| out << ".Gather"; |
| if (builtin->Parameters()[0]->Usage() == sem::ParameterUsage::kComponent) { |
| switch (call->Arguments()[0]->ConstantValue()->ValueAs<AInt>()) { |
| case 0: |
| out << "Red"; |
| break; |
| case 1: |
| out << "Green"; |
| break; |
| case 2: |
| out << "Blue"; |
| break; |
| case 3: |
| out << "Alpha"; |
| break; |
| } |
| } |
| out << "("; |
| break; |
| case builtin::Function::kTextureGatherCompare: |
| out << ".GatherCmp("; |
| break; |
| case builtin::Function::kTextureStore: |
| out << "["; |
| break; |
| default: |
| diagnostics_.add_error(diag::System::Writer, |
| "Internal compiler error: Unhandled texture builtin '" + |
| std::string(builtin->str()) + "'"); |
| return false; |
| } |
| |
| if (auto* sampler = arg(Usage::kSampler)) { |
| if (!EmitExpression(out, sampler)) { |
| return false; |
| } |
| out << ", "; |
| } |
| |
| auto* param_coords = arg(Usage::kCoords); |
| if (TINT_UNLIKELY(!param_coords)) { |
| TINT_ICE(Writer, diagnostics_) << "missing coords argument"; |
| return false; |
| } |
| |
| auto emit_vector_appended_with_i32_zero = [&](const ast::Expression* vector) { |
| auto* i32 = builder_.create<type::I32>(); |
| auto* zero = builder_.Expr(0_i); |
| auto* stmt = builder_.Sem().Get(vector)->Stmt(); |
| builder_.Sem().Add(zero, builder_.create<sem::ValueExpression>( |
| zero, i32, sem::EvaluationStage::kRuntime, stmt, |
| /* constant_value */ nullptr, |
| /* has_side_effects */ false)); |
| auto* packed = AppendVector(&builder_, vector, zero); |
| return EmitExpression(out, packed->Declaration()); |
| }; |
| |
| auto emit_vector_appended_with_level = [&](const ast::Expression* vector) { |
| if (auto* level = arg(Usage::kLevel)) { |
| auto* packed = AppendVector(&builder_, vector, level); |
| return EmitExpression(out, packed->Declaration()); |
| } |
| return emit_vector_appended_with_i32_zero(vector); |
| }; |
| |
| if (auto* array_index = arg(Usage::kArrayIndex)) { |
| // Array index needs to be appended to the coordinates. |
| auto* packed = AppendVector(&builder_, param_coords, array_index); |
| if (pack_level_in_coords) { |
| // Then mip level needs to be appended to the coordinates. |
| if (!emit_vector_appended_with_level(packed->Declaration())) { |
| return false; |
| } |
| } else { |
| if (!EmitExpression(out, packed->Declaration())) { |
| return false; |
| } |
| } |
| } else if (pack_level_in_coords) { |
| // Mip level needs to be appended to the coordinates. |
| if (!emit_vector_appended_with_level(param_coords)) { |
| return false; |
| } |
| } else { |
| if (!EmitExpression(out, param_coords)) { |
| return false; |
| } |
| } |
| |
| for (auto usage : {Usage::kDepthRef, Usage::kBias, Usage::kLevel, Usage::kDdx, Usage::kDdy, |
| Usage::kSampleIndex, Usage::kOffset}) { |
| if (usage == Usage::kLevel && pack_level_in_coords) { |
| continue; // mip level already packed in coordinates. |
| } |
| if (auto* e = arg(usage)) { |
| out << ", "; |
| if (!EmitExpression(out, e)) { |
| return false; |
| } |
| } |
| } |
| |
| if (builtin->Type() == builtin::Function::kTextureStore) { |
| out << "] = "; |
| if (!EmitExpression(out, arg(Usage::kValue))) { |
| return false; |
| } |
| } else { |
| out << ")"; |
| |
| // If the builtin return type does not match the number of elements of the |
| // HLSL builtin, we need to swizzle the expression to generate the correct |
| // number of components. |
| uint32_t wgsl_ret_width = 1; |
| if (auto* vec = builtin->ReturnType()->As<type::Vector>()) { |
| wgsl_ret_width = vec->Width(); |
| } |
| if (wgsl_ret_width < hlsl_ret_width) { |
| out << "."; |
| for (uint32_t i = 0; i < wgsl_ret_width; i++) { |
| out << "xyz"[i]; |
| } |
| } |
| if (TINT_UNLIKELY(wgsl_ret_width > hlsl_ret_width)) { |
| TINT_ICE(Writer, diagnostics_) |
| << "WGSL return width (" << wgsl_ret_width << ") is wider than HLSL return width (" |
| << hlsl_ret_width << ") for " << builtin->Type(); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| std::string GeneratorImpl::generate_builtin_name(const sem::Builtin* builtin) { |
| switch (builtin->Type()) { |
| case builtin::Function::kAbs: |
| case builtin::Function::kAcos: |
| case builtin::Function::kAll: |
| case builtin::Function::kAny: |
| case builtin::Function::kAsin: |
| case builtin::Function::kAtan: |
| case builtin::Function::kAtan2: |
| case builtin::Function::kCeil: |
| case builtin::Function::kClamp: |
| case builtin::Function::kCos: |
| |