| // Copyright 2023 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "src/tint/lang/spirv/reader/parser/parser.h" |
| |
| #include <algorithm> |
| #include <memory> |
| #include <utility> |
| #include <vector> |
| |
| TINT_BEGIN_DISABLE_WARNING(NEWLINE_EOF); |
| TINT_BEGIN_DISABLE_WARNING(OLD_STYLE_CAST); |
| TINT_BEGIN_DISABLE_WARNING(SIGN_CONVERSION); |
| TINT_BEGIN_DISABLE_WARNING(WEAK_VTABLES); |
| #include "source/opt/build_module.h" |
| TINT_END_DISABLE_WARNING(WEAK_VTABLES); |
| TINT_END_DISABLE_WARNING(SIGN_CONVERSION); |
| TINT_END_DISABLE_WARNING(OLD_STYLE_CAST); |
| TINT_END_DISABLE_WARNING(NEWLINE_EOF); |
| |
| #include "src/tint/lang/core/ir/builder.h" |
| #include "src/tint/lang/core/ir/module.h" |
| #include "src/tint/lang/spirv/validate/validate.h" |
| |
| using namespace tint::core::fluent_types; // NOLINT |
| |
| namespace tint::spirv::reader { |
| |
| namespace { |
| |
| /// The SPIR-V environment that we validate against. |
| constexpr auto kTargetEnv = SPV_ENV_VULKAN_1_1; |
| |
| /// PIMPL class for SPIR-V parser. |
| /// Validates the SPIR-V module and then parses it to produce a Tint IR module. |
| class Parser { |
| public: |
| /// @param spirv the SPIR-V binary data |
| /// @returns the generated SPIR-V IR module on success, or failure |
| Result<core::ir::Module> Run(Slice<const uint32_t> spirv) { |
| // Validate the incoming SPIR-V binary. |
| auto result = validate::Validate(spirv, kTargetEnv); |
| if (result != Success) { |
| return result.Failure(); |
| } |
| |
| // Build the SPIR-V tools internal representation of the SPIR-V module. |
| spvtools::Context context(kTargetEnv); |
| spirv_context_ = |
| spvtools::BuildModule(kTargetEnv, context.CContext()->consumer, spirv.data, spirv.len); |
| if (!spirv_context_) { |
| return Failure("failed to build the internal representation of the module"); |
| } |
| |
| // Check for unsupported extensions. |
| for (const auto& ext : spirv_context_->extensions()) { |
| auto name = ext.GetOperand(0).AsString(); |
| if (name != "SPV_KHR_storage_buffer_storage_class") { |
| return Failure("SPIR-V extension '" + name + "' is not supported"); |
| } |
| } |
| |
| { |
| TINT_SCOPED_ASSIGNMENT(current_block_, ir_.root_block); |
| EmitModuleScopeVariables(); |
| } |
| |
| EmitFunctions(); |
| |
| EmitEntryPoints(); |
| |
| // TODO(crbug.com/tint/1907): Handle annotation instructions. |
| // TODO(crbug.com/tint/1907): Handle names. |
| |
| return std::move(ir_); |
| } |
| |
| /// @param sc a SPIR-V storage class |
| /// @returns the Tint address space for a SPIR-V storage class |
| core::AddressSpace AddressSpace(spv::StorageClass sc) { |
| switch (sc) { |
| case spv::StorageClass::Input: |
| return core::AddressSpace::kIn; |
| case spv::StorageClass::Output: |
| return core::AddressSpace::kOut; |
| case spv::StorageClass::Function: |
| return core::AddressSpace::kFunction; |
| case spv::StorageClass::Private: |
| return core::AddressSpace::kPrivate; |
| case spv::StorageClass::StorageBuffer: |
| return core::AddressSpace::kStorage; |
| case spv::StorageClass::Uniform: |
| return core::AddressSpace::kUniform; |
| default: |
| TINT_UNIMPLEMENTED() |
| << "unhandled SPIR-V storage class: " << static_cast<uint32_t>(sc); |
| return core::AddressSpace::kUndefined; |
| } |
| } |
| |
| /// @param b a SPIR-V BuiltIn |
| /// @returns the Tint builtin value for a SPIR-V BuiltIn decoration |
| core::BuiltinValue Builtin(spv::BuiltIn b) { |
| switch (b) { |
| case spv::BuiltIn::FragCoord: |
| return core::BuiltinValue::kPosition; |
| case spv::BuiltIn::FragDepth: |
| return core::BuiltinValue::kFragDepth; |
| case spv::BuiltIn::FrontFacing: |
| return core::BuiltinValue::kFrontFacing; |
| case spv::BuiltIn::GlobalInvocationId: |
| return core::BuiltinValue::kGlobalInvocationId; |
| case spv::BuiltIn::InstanceIndex: |
| return core::BuiltinValue::kInstanceIndex; |
| case spv::BuiltIn::LocalInvocationId: |
| return core::BuiltinValue::kLocalInvocationId; |
| case spv::BuiltIn::LocalInvocationIndex: |
| return core::BuiltinValue::kLocalInvocationIndex; |
| case spv::BuiltIn::NumWorkgroups: |
| return core::BuiltinValue::kNumWorkgroups; |
| case spv::BuiltIn::PointSize: |
| return core::BuiltinValue::kPointSize; |
| case spv::BuiltIn::Position: |
| return core::BuiltinValue::kPosition; |
| case spv::BuiltIn::SampleId: |
| return core::BuiltinValue::kSampleIndex; |
| case spv::BuiltIn::SampleMask: |
| return core::BuiltinValue::kSampleMask; |
| case spv::BuiltIn::VertexIndex: |
| return core::BuiltinValue::kVertexIndex; |
| case spv::BuiltIn::WorkgroupId: |
| return core::BuiltinValue::kWorkgroupId; |
| default: |
| TINT_UNIMPLEMENTED() << "unhandled SPIR-V BuiltIn: " << static_cast<uint32_t>(b); |
| return core::BuiltinValue::kUndefined; |
| } |
| } |
| |
| /// @param type a SPIR-V type object |
| /// @param access_mode an optional access mode (for pointers) |
| /// @returns a Tint type object |
| const core::type::Type* Type(const spvtools::opt::analysis::Type* type, |
| core::Access access_mode = core::Access::kUndefined) { |
| return types_.GetOrAdd(TypeKey{type, access_mode}, [&]() -> const core::type::Type* { |
| switch (type->kind()) { |
| case spvtools::opt::analysis::Type::kVoid: |
| return ty_.void_(); |
| case spvtools::opt::analysis::Type::kBool: |
| return ty_.bool_(); |
| case spvtools::opt::analysis::Type::kInteger: { |
| auto* int_ty = type->AsInteger(); |
| TINT_ASSERT_OR_RETURN_VALUE(int_ty->width() == 32, ty_.void_()); |
| if (int_ty->IsSigned()) { |
| return ty_.i32(); |
| } else { |
| return ty_.u32(); |
| } |
| } |
| case spvtools::opt::analysis::Type::kFloat: { |
| auto* float_ty = type->AsFloat(); |
| if (float_ty->width() == 16) { |
| return ty_.f16(); |
| } else if (float_ty->width() == 32) { |
| return ty_.f32(); |
| } else { |
| TINT_UNREACHABLE() |
| << "unsupported floating point type width: " << float_ty->width(); |
| return ty_.void_(); |
| } |
| } |
| case spvtools::opt::analysis::Type::kVector: { |
| auto* vec_ty = type->AsVector(); |
| TINT_ASSERT_OR_RETURN_VALUE(vec_ty->element_count() <= 4, ty_.void_()); |
| return ty_.vec(Type(vec_ty->element_type()), vec_ty->element_count()); |
| } |
| case spvtools::opt::analysis::Type::kMatrix: { |
| auto* mat_ty = type->AsMatrix(); |
| TINT_ASSERT_OR_RETURN_VALUE(mat_ty->element_count() <= 4, ty_.void_()); |
| return ty_.mat(As<core::type::Vector>(Type(mat_ty->element_type())), |
| mat_ty->element_count()); |
| } |
| case spvtools::opt::analysis::Type::kArray: |
| return EmitArray(type->AsArray()); |
| case spvtools::opt::analysis::Type::kStruct: |
| return EmitStruct(type->AsStruct()); |
| case spvtools::opt::analysis::Type::kPointer: { |
| auto* ptr_ty = type->AsPointer(); |
| return ty_.ptr(AddressSpace(ptr_ty->storage_class()), |
| Type(ptr_ty->pointee_type()), access_mode); |
| } |
| default: |
| TINT_UNIMPLEMENTED() << "unhandled SPIR-V type: " << type->str(); |
| return ty_.void_(); |
| } |
| }); |
| } |
| |
| /// @param id a SPIR-V result ID for a type declaration instruction |
| /// @param access_mode an optional access mode (for pointers) |
| /// @returns a Tint type object |
| const core::type::Type* Type(uint32_t id, core::Access access_mode = core::Access::kUndefined) { |
| return Type(spirv_context_->get_type_mgr()->GetType(id), access_mode); |
| } |
| |
| /// @param arr_ty a SPIR-V array object |
| /// @returns a Tint array object |
| const core::type::Type* EmitArray(const spvtools::opt::analysis::Array* arr_ty) { |
| const auto& length = arr_ty->length_info(); |
| TINT_ASSERT_OR_RETURN_VALUE(!length.words.empty(), ty_.void_()); |
| if (length.words[0] != spvtools::opt::analysis::Array::LengthInfo::kConstant) { |
| TINT_UNIMPLEMENTED() << "specialized array lengths"; |
| return ty_.void_(); |
| } |
| |
| // Get the value from the constant used for the element count. |
| const auto* count_const = |
| spirv_context_->get_constant_mgr()->FindDeclaredConstant(length.id); |
| TINT_ASSERT_OR_RETURN_VALUE(count_const, ty_.void_()); |
| const uint64_t count_val = count_const->GetZeroExtendedValue(); |
| TINT_ASSERT_OR_RETURN_VALUE(count_val <= UINT32_MAX, ty_.void_()); |
| |
| // TODO(crbug.com/1907): Handle decorations that affect the array layout. |
| |
| return ty_.array(Type(arr_ty->element_type()), static_cast<uint32_t>(count_val)); |
| } |
| |
| /// @param struct_ty a SPIR-V struct object |
| /// @returns a Tint struct object |
| const core::type::Type* EmitStruct(const spvtools::opt::analysis::Struct* struct_ty) { |
| if (struct_ty->NumberOfComponents() == 0) { |
| TINT_ICE() << "empty structures are not supported"; |
| return ty_.void_(); |
| } |
| |
| // Build a list of struct members. |
| uint32_t current_size = 0u; |
| Vector<core::type::StructMember*, 4> members; |
| for (uint32_t i = 0; i < struct_ty->NumberOfComponents(); i++) { |
| auto* member_ty = Type(struct_ty->element_types()[i]); |
| uint32_t align = std::max<uint32_t>(member_ty->Align(), 1u); |
| uint32_t offset = tint::RoundUp(align, current_size); |
| core::type::StructMemberAttributes attributes; |
| auto interpolation = [&]() -> core::Interpolation& { |
| // Create the interpolation field with the default values on first call. |
| if (!attributes.interpolation.has_value()) { |
| attributes.interpolation = |
| core::Interpolation{core::InterpolationType::kPerspective, |
| core::InterpolationSampling::kCenter}; |
| } |
| return attributes.interpolation.value(); |
| }; |
| |
| // Handle member decorations that affect layout or attributes. |
| if (struct_ty->element_decorations().count(i)) { |
| for (auto& deco : struct_ty->element_decorations().at(i)) { |
| switch (spv::Decoration(deco[0])) { |
| case spv::Decoration::Offset: |
| offset = deco[1]; |
| break; |
| case spv::Decoration::BuiltIn: |
| attributes.builtin = Builtin(spv::BuiltIn(deco[1])); |
| break; |
| case spv::Decoration::Invariant: |
| attributes.invariant = true; |
| break; |
| case spv::Decoration::Location: |
| attributes.location = deco[1]; |
| break; |
| case spv::Decoration::NoPerspective: |
| interpolation().type = core::InterpolationType::kLinear; |
| break; |
| case spv::Decoration::Flat: |
| interpolation().type = core::InterpolationType::kFlat; |
| break; |
| case spv::Decoration::Centroid: |
| interpolation().sampling = core::InterpolationSampling::kCentroid; |
| break; |
| case spv::Decoration::Sample: |
| interpolation().sampling = core::InterpolationSampling::kSample; |
| break; |
| |
| default: |
| TINT_UNIMPLEMENTED() << "unhandled member decoration: " << deco[0]; |
| break; |
| } |
| } |
| } |
| |
| // TODO(crbug.com/tint/1907): Use OpMemberName to name it. |
| members.Push(ty_.Get<core::type::StructMember>(ir_.symbols.New(), member_ty, i, offset, |
| align, member_ty->Size(), |
| std::move(attributes))); |
| |
| current_size = offset + member_ty->Size(); |
| } |
| // TODO(crbug.com/tint/1907): Use OpName to name it. |
| return ty_.Struct(ir_.symbols.New(), std::move(members)); |
| } |
| |
| /// @param id a SPIR-V result ID for a function declaration instruction |
| /// @returns a Tint function object |
| core::ir::Function* Function(uint32_t id) { |
| return functions_.GetOrAdd(id, [&] { |
| return b_.Function(ty_.void_(), core::ir::Function::PipelineStage::kUndefined, |
| std::nullopt); |
| }); |
| } |
| |
| /// @param id a SPIR-V result ID |
| /// @returns a Tint value object |
| core::ir::Value* Value(uint32_t id) { |
| return values_.GetOrAdd(id, [&]() -> core::ir::Value* { |
| if (auto* c = spirv_context_->get_constant_mgr()->FindDeclaredConstant(id)) { |
| return b_.Constant(Constant(c)); |
| } |
| TINT_UNREACHABLE() << "missing value for result ID " << id; |
| return nullptr; |
| }); |
| } |
| |
| /// @param constant a SPIR-V constant object |
| /// @returns a Tint constant value |
| const core::constant::Value* Constant(const spvtools::opt::analysis::Constant* constant) { |
| // Handle OpConstantNull for all types. |
| if (constant->AsNullConstant()) { |
| return ir_.constant_values.Zero(Type(constant->type())); |
| } |
| |
| if (auto* bool_ = constant->AsBoolConstant()) { |
| return b_.ConstantValue(bool_->value()); |
| } |
| if (auto* i = constant->AsIntConstant()) { |
| auto* int_ty = i->type()->AsInteger(); |
| TINT_ASSERT_OR_RETURN_VALUE(int_ty->width() == 32, nullptr); |
| if (int_ty->IsSigned()) { |
| return b_.ConstantValue(i32(i->GetS32BitValue())); |
| } else { |
| return b_.ConstantValue(u32(i->GetU32BitValue())); |
| } |
| } |
| if (auto* f = constant->AsFloatConstant()) { |
| auto* float_ty = f->type()->AsFloat(); |
| if (float_ty->width() == 16) { |
| return b_.ConstantValue(f16::FromBits(static_cast<uint16_t>(f->words()[0]))); |
| } else if (float_ty->width() == 32) { |
| return b_.ConstantValue(f32(f->GetFloat())); |
| } else { |
| TINT_UNREACHABLE() << "unsupported floating point type width"; |
| return nullptr; |
| } |
| } |
| if (auto* v = constant->AsVectorConstant()) { |
| Vector<const core::constant::Value*, 4> elements; |
| for (auto& el : v->GetComponents()) { |
| elements.Push(Constant(el)); |
| } |
| return ir_.constant_values.Composite(Type(v->type()), std::move(elements)); |
| } |
| if (auto* m = constant->AsMatrixConstant()) { |
| Vector<const core::constant::Value*, 4> columns; |
| for (auto& el : m->GetComponents()) { |
| columns.Push(Constant(el)); |
| } |
| return ir_.constant_values.Composite(Type(m->type()), std::move(columns)); |
| } |
| if (auto* a = constant->AsArrayConstant()) { |
| Vector<const core::constant::Value*, 16> elements; |
| for (auto& el : a->GetComponents()) { |
| elements.Push(Constant(el)); |
| } |
| return ir_.constant_values.Composite(Type(a->type()), std::move(elements)); |
| } |
| if (auto* s = constant->AsStructConstant()) { |
| Vector<const core::constant::Value*, 16> elements; |
| for (auto& el : s->GetComponents()) { |
| elements.Push(Constant(el)); |
| } |
| return ir_.constant_values.Composite(Type(s->type()), std::move(elements)); |
| } |
| TINT_UNIMPLEMENTED() << "unhandled constant type"; |
| return nullptr; |
| } |
| |
| /// Register an IR value for a SPIR-V result ID. |
| /// @param result_id the SPIR-V result ID |
| /// @param value the IR value |
| void AddValue(uint32_t result_id, core::ir::Value* value) { values_.Add(result_id, value); } |
| |
| /// Emit an instruction to the current block. |
| /// @param inst the instruction to emit |
| /// @param result_id an optional SPIR-V result ID to register the instruction result for |
| void Emit(core::ir::Instruction* inst, uint32_t result_id = 0) { |
| current_block_->Append(inst); |
| if (result_id != 0) { |
| TINT_ASSERT_OR_RETURN(inst->Results().Length() == 1u); |
| AddValue(result_id, inst->Result(0)); |
| } |
| } |
| |
| /// Emit the module-scope variables. |
| void EmitModuleScopeVariables() { |
| for (auto& inst : spirv_context_->module()->types_values()) { |
| if (inst.opcode() == spv::Op::OpVariable) { |
| EmitVar(inst); |
| } |
| } |
| } |
| |
| /// Emit the functions. |
| void EmitFunctions() { |
| for (auto& func : *spirv_context_->module()) { |
| Vector<core::ir::FunctionParam*, 4> params; |
| func.ForEachParam([&](spvtools::opt::Instruction* spirv_param) { |
| auto* param = b_.FunctionParam(Type(spirv_param->type_id())); |
| values_.Add(spirv_param->result_id(), param); |
| params.Push(param); |
| }); |
| |
| current_function_ = Function(func.result_id()); |
| current_function_->SetParams(std::move(params)); |
| current_function_->SetReturnType(Type(func.type_id())); |
| |
| functions_.Add(func.result_id(), current_function_); |
| EmitBlock(current_function_->Block(), *func.entry()); |
| } |
| } |
| |
| /// Emit entry point attributes. |
| void EmitEntryPoints() { |
| // Handle OpEntryPoint declarations. |
| for (auto& entry_point : spirv_context_->module()->entry_points()) { |
| auto model = entry_point.GetSingleWordInOperand(0); |
| auto* func = Function(entry_point.GetSingleWordInOperand(1)); |
| |
| // Set the pipeline stage. |
| switch (spv::ExecutionModel(model)) { |
| case spv::ExecutionModel::GLCompute: |
| func->SetStage(core::ir::Function::PipelineStage::kCompute); |
| break; |
| case spv::ExecutionModel::Fragment: |
| func->SetStage(core::ir::Function::PipelineStage::kFragment); |
| break; |
| case spv::ExecutionModel::Vertex: |
| func->SetStage(core::ir::Function::PipelineStage::kVertex); |
| break; |
| default: |
| TINT_UNIMPLEMENTED() << "unhandled execution model: " << model; |
| } |
| |
| // Set the entry point name. |
| ir_.SetName(func, entry_point.GetOperand(2).AsString()); |
| } |
| |
| // Handle OpExecutionMode declarations. |
| for (auto& execution_mode : spirv_context_->module()->execution_modes()) { |
| auto* func = functions_.GetOr(execution_mode.GetSingleWordInOperand(0), nullptr); |
| auto mode = execution_mode.GetSingleWordInOperand(1); |
| TINT_ASSERT_OR_RETURN(func); |
| |
| switch (spv::ExecutionMode(mode)) { |
| case spv::ExecutionMode::LocalSize: |
| func->SetWorkgroupSize(execution_mode.GetSingleWordInOperand(2), |
| execution_mode.GetSingleWordInOperand(3), |
| execution_mode.GetSingleWordInOperand(4)); |
| break; |
| case spv::ExecutionMode::OriginUpperLeft: |
| break; |
| default: |
| TINT_UNIMPLEMENTED() << "unhandled execution mode: " << mode; |
| } |
| } |
| } |
| |
| /// Emit the contents of SPIR-V block @p src into Tint IR block @p dst. |
| /// @param dst the Tint IR block to append to |
| /// @param src the SPIR-V block to emit |
| void EmitBlock(core::ir::Block* dst, const spvtools::opt::BasicBlock& src) { |
| TINT_SCOPED_ASSIGNMENT(current_block_, dst); |
| for (auto& inst : src) { |
| switch (inst.opcode()) { |
| case spv::Op::OpAccessChain: |
| case spv::Op::OpInBoundsAccessChain: |
| EmitAccess(inst); |
| break; |
| case spv::Op::OpCompositeConstruct: |
| EmitConstruct(inst); |
| break; |
| case spv::Op::OpCompositeExtract: |
| EmitCompositeExtract(inst); |
| break; |
| case spv::Op::OpFAdd: |
| EmitBinary(inst, core::BinaryOp::kAdd); |
| break; |
| case spv::Op::OpFunctionCall: |
| EmitFunctionCall(inst); |
| break; |
| case spv::Op::OpLoad: |
| Emit(b_.Load(Value(inst.GetSingleWordOperand(2))), inst.result_id()); |
| break; |
| case spv::Op::OpReturn: |
| Emit(b_.Return(current_function_)); |
| break; |
| case spv::Op::OpReturnValue: |
| Emit(b_.Return(current_function_, Value(inst.GetSingleWordOperand(0)))); |
| break; |
| case spv::Op::OpStore: |
| Emit(b_.Store(Value(inst.GetSingleWordOperand(0)), |
| Value(inst.GetSingleWordOperand(1)))); |
| break; |
| case spv::Op::OpVariable: |
| EmitVar(inst); |
| break; |
| default: |
| TINT_UNIMPLEMENTED() |
| << "unhandled SPIR-V instruction: " << static_cast<uint32_t>(inst.opcode()); |
| } |
| } |
| } |
| |
| /// @param inst the SPIR-V instruction for OpAccessChain |
| void EmitAccess(const spvtools::opt::Instruction& inst) { |
| Vector<core::ir::Value*, 4> indices; |
| for (uint32_t i = 3; i < inst.NumOperandWords(); i++) { |
| indices.Push(Value(inst.GetSingleWordOperand(i))); |
| } |
| auto* base = Value(inst.GetSingleWordOperand(2)); |
| |
| // Propagate the access mode of the base object. |
| auto access_mode = core::Access::kUndefined; |
| if (auto* ptr = base->Type()->As<core::type::Pointer>()) { |
| access_mode = ptr->Access(); |
| } |
| |
| auto* access = b_.Access(Type(inst.type_id(), access_mode), base, std::move(indices)); |
| Emit(access, inst.result_id()); |
| } |
| |
| /// @param inst the SPIR-V instruction |
| /// @param op the binary operator to use |
| void EmitBinary(const spvtools::opt::Instruction& inst, core::BinaryOp op) { |
| auto* lhs = Value(inst.GetSingleWordOperand(2)); |
| auto* rhs = Value(inst.GetSingleWordOperand(3)); |
| auto* binary = b_.Binary(op, Type(inst.type_id()), lhs, rhs); |
| Emit(binary, inst.result_id()); |
| } |
| |
| /// @param inst the SPIR-V instruction for OpCompositeExtract |
| void EmitCompositeExtract(const spvtools::opt::Instruction& inst) { |
| Vector<core::ir::Value*, 4> indices; |
| for (uint32_t i = 3; i < inst.NumOperandWords(); i++) { |
| indices.Push(b_.Constant(u32(inst.GetSingleWordOperand(i)))); |
| } |
| auto* object = Value(inst.GetSingleWordOperand(2)); |
| auto* access = b_.Access(Type(inst.type_id()), object, std::move(indices)); |
| Emit(access, inst.result_id()); |
| } |
| |
| /// @param inst the SPIR-V instruction for OpCompositeConstruct |
| void EmitConstruct(const spvtools::opt::Instruction& inst) { |
| Vector<core::ir::Value*, 4> values; |
| for (uint32_t i = 2; i < inst.NumOperandWords(); i++) { |
| values.Push(Value(inst.GetSingleWordOperand(i))); |
| } |
| auto* construct = b_.Construct(Type(inst.type_id()), std::move(values)); |
| Emit(construct, inst.result_id()); |
| } |
| |
| /// @param inst the SPIR-V instruction for OpFunctionCall |
| void EmitFunctionCall(const spvtools::opt::Instruction& inst) { |
| // TODO(crbug.com/tint/1907): Capture result. |
| Vector<core::ir::Value*, 4> args; |
| for (uint32_t i = 3; i < inst.NumOperandWords(); i++) { |
| args.Push(Value(inst.GetSingleWordOperand(i))); |
| } |
| Emit(b_.Call(Function(inst.GetSingleWordInOperand(0)), std::move(args)), inst.result_id()); |
| } |
| |
| /// @param inst the SPIR-V instruction for OpVariable |
| void EmitVar(const spvtools::opt::Instruction& inst) { |
| // Handle decorations. |
| std::optional<uint32_t> group; |
| std::optional<uint32_t> binding; |
| core::Access access_mode = core::Access::kUndefined; |
| core::ir::IOAttributes io_attributes; |
| auto interpolation = [&]() -> core::Interpolation& { |
| // Create the interpolation field with the default values on first call. |
| if (!io_attributes.interpolation.has_value()) { |
| io_attributes.interpolation = core::Interpolation{ |
| core::InterpolationType::kPerspective, core::InterpolationSampling::kCenter}; |
| } |
| return io_attributes.interpolation.value(); |
| }; |
| for (auto* deco : |
| spirv_context_->get_decoration_mgr()->GetDecorationsFor(inst.result_id(), false)) { |
| auto d = deco->GetSingleWordOperand(1); |
| switch (spv::Decoration(d)) { |
| case spv::Decoration::NonWritable: |
| access_mode = core::Access::kRead; |
| break; |
| case spv::Decoration::DescriptorSet: |
| group = deco->GetSingleWordOperand(2); |
| break; |
| case spv::Decoration::Binding: |
| binding = deco->GetSingleWordOperand(2); |
| break; |
| case spv::Decoration::BuiltIn: |
| io_attributes.builtin = Builtin(spv::BuiltIn(deco->GetSingleWordOperand(2))); |
| break; |
| case spv::Decoration::Invariant: |
| io_attributes.invariant = true; |
| break; |
| case spv::Decoration::Location: |
| io_attributes.location = deco->GetSingleWordOperand(2); |
| break; |
| case spv::Decoration::NoPerspective: |
| interpolation().type = core::InterpolationType::kLinear; |
| break; |
| case spv::Decoration::Flat: |
| interpolation().type = core::InterpolationType::kFlat; |
| break; |
| case spv::Decoration::Centroid: |
| interpolation().sampling = core::InterpolationSampling::kCentroid; |
| break; |
| case spv::Decoration::Sample: |
| interpolation().sampling = core::InterpolationSampling::kSample; |
| break; |
| default: |
| TINT_UNIMPLEMENTED() << "unhandled decoration " << d; |
| break; |
| } |
| } |
| |
| auto* var = b_.Var(Type(inst.type_id(), access_mode)->As<core::type::Pointer>()); |
| if (inst.NumOperands() > 3) { |
| var->SetInitializer(Value(inst.GetSingleWordOperand(3))); |
| } |
| |
| if (group || binding) { |
| TINT_ASSERT(group && binding); |
| var->SetBindingPoint(group.value(), binding.value()); |
| } |
| var->SetAttributes(std::move(io_attributes)); |
| |
| Emit(var, inst.result_id()); |
| } |
| |
| private: |
| /// TypeKey describes a SPIR-V type with an access mode. |
| struct TypeKey { |
| /// The SPIR-V type object. |
| const spvtools::opt::analysis::Type* type; |
| /// The access mode. |
| core::Access access_mode; |
| |
| // Equality operator for TypeKey. |
| bool operator==(const TypeKey& other) const { |
| return type == other.type && access_mode == other.access_mode; |
| } |
| |
| /// @returns the hash code of the TypeKey |
| tint::HashCode HashCode() const { return Hash(type, access_mode); } |
| }; |
| |
| /// The generated IR module. |
| core::ir::Module ir_; |
| /// The Tint IR builder. |
| core::ir::Builder b_{ir_}; |
| /// The Tint type manager. |
| core::type::Manager& ty_{ir_.Types()}; |
| |
| /// The Tint IR function that is currently being emitted. |
| core::ir::Function* current_function_ = nullptr; |
| /// The Tint IR block that is currently being emitted. |
| core::ir::Block* current_block_ = nullptr; |
| /// A map from a SPIR-V type declaration to the corresponding Tint type object. |
| Hashmap<TypeKey, const core::type::Type*, 16> types_; |
| /// A map from a SPIR-V function definition result ID to the corresponding Tint function object. |
| Hashmap<uint32_t, core::ir::Function*, 8> functions_; |
| /// A map from a SPIR-V result ID to the corresponding Tint value object. |
| Hashmap<uint32_t, core::ir::Value*, 8> values_; |
| |
| /// The SPIR-V context containing the SPIR-V tools intermediate representation. |
| std::unique_ptr<spvtools::opt::IRContext> spirv_context_; |
| }; |
| |
| } // namespace |
| |
| Result<core::ir::Module> Parse(Slice<const uint32_t> spirv) { |
| return Parser{}.Run(spirv); |
| } |
| |
| } // namespace tint::spirv::reader |
