| // 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/msl/writer/printer/printer.h" |
| |
| #include <unordered_map> |
| #include <unordered_set> |
| #include <utility> |
| |
| #include "src/tint/lang/core/constant/composite.h" |
| #include "src/tint/lang/core/constant/splat.h" |
| #include "src/tint/lang/core/fluent_types.h" |
| #include "src/tint/lang/core/ir/access.h" |
| #include "src/tint/lang/core/ir/binary.h" |
| #include "src/tint/lang/core/ir/bitcast.h" |
| #include "src/tint/lang/core/ir/break_if.h" |
| #include "src/tint/lang/core/ir/constant.h" |
| #include "src/tint/lang/core/ir/construct.h" |
| #include "src/tint/lang/core/ir/continue.h" |
| #include "src/tint/lang/core/ir/convert.h" |
| #include "src/tint/lang/core/ir/core_builtin_call.h" |
| #include "src/tint/lang/core/ir/discard.h" |
| #include "src/tint/lang/core/ir/exit_if.h" |
| #include "src/tint/lang/core/ir/exit_loop.h" |
| #include "src/tint/lang/core/ir/exit_switch.h" |
| #include "src/tint/lang/core/ir/ice.h" |
| #include "src/tint/lang/core/ir/if.h" |
| #include "src/tint/lang/core/ir/let.h" |
| #include "src/tint/lang/core/ir/load.h" |
| #include "src/tint/lang/core/ir/load_vector_element.h" |
| #include "src/tint/lang/core/ir/module.h" |
| #include "src/tint/lang/core/ir/multi_in_block.h" |
| #include "src/tint/lang/core/ir/next_iteration.h" |
| #include "src/tint/lang/core/ir/return.h" |
| #include "src/tint/lang/core/ir/store.h" |
| #include "src/tint/lang/core/ir/store_vector_element.h" |
| #include "src/tint/lang/core/ir/switch.h" |
| #include "src/tint/lang/core/ir/swizzle.h" |
| #include "src/tint/lang/core/ir/terminate_invocation.h" |
| #include "src/tint/lang/core/ir/unreachable.h" |
| #include "src/tint/lang/core/ir/user_call.h" |
| #include "src/tint/lang/core/ir/validator.h" |
| #include "src/tint/lang/core/ir/var.h" |
| #include "src/tint/lang/core/type/array.h" |
| #include "src/tint/lang/core/type/atomic.h" |
| #include "src/tint/lang/core/type/bool.h" |
| #include "src/tint/lang/core/type/depth_multisampled_texture.h" |
| #include "src/tint/lang/core/type/depth_texture.h" |
| #include "src/tint/lang/core/type/external_texture.h" |
| #include "src/tint/lang/core/type/f16.h" |
| #include "src/tint/lang/core/type/f32.h" |
| #include "src/tint/lang/core/type/i32.h" |
| #include "src/tint/lang/core/type/matrix.h" |
| #include "src/tint/lang/core/type/multisampled_texture.h" |
| #include "src/tint/lang/core/type/pointer.h" |
| #include "src/tint/lang/core/type/sampled_texture.h" |
| #include "src/tint/lang/core/type/storage_texture.h" |
| #include "src/tint/lang/core/type/texture.h" |
| #include "src/tint/lang/core/type/u32.h" |
| #include "src/tint/lang/core/type/vector.h" |
| #include "src/tint/lang/core/type/void.h" |
| #include "src/tint/lang/msl/barrier_type.h" |
| #include "src/tint/lang/msl/ir/builtin_call.h" |
| #include "src/tint/lang/msl/writer/common/printer_support.h" |
| #include "src/tint/utils/containers/map.h" |
| #include "src/tint/utils/generator/text_generator.h" |
| #include "src/tint/utils/macros/scoped_assignment.h" |
| #include "src/tint/utils/rtti/switch.h" |
| #include "src/tint/utils/text/string.h" |
| |
| using namespace tint::core::fluent_types; // NOLINT |
| |
| namespace tint::msl::writer { |
| namespace { |
| |
| /// PIMPL class for the MSL generator |
| class Printer : public tint::TextGenerator { |
| public: |
| /// Constructor |
| /// @param module the Tint IR module to generate |
| explicit Printer(core::ir::Module& module) : ir_(module) {} |
| |
| /// @returns the generated MSL shader |
| tint::Result<std::string> Generate() { |
| auto valid = core::ir::ValidateAndDumpIfNeeded(ir_, "MSL writer"); |
| if (valid != Success) { |
| return std::move(valid.Failure()); |
| } |
| |
| { |
| TINT_SCOPED_ASSIGNMENT(current_buffer_, &preamble_buffer_); |
| Line() << "#include <metal_stdlib>"; |
| Line() << "using namespace metal;"; |
| } |
| |
| // Emit module-scope declarations. |
| EmitBlockInstructions(ir_.root_block); |
| |
| // Emit functions. |
| for (auto& func : ir_.functions) { |
| EmitFunction(func); |
| } |
| |
| StringStream ss; |
| ss << preamble_buffer_.String() << std::endl << main_buffer_.String(); |
| return ss.str(); |
| } |
| |
| private: |
| /// Map of builtin structure to unique generated name |
| std::unordered_map<const core::type::Struct*, std::string> builtin_struct_names_; |
| |
| core::ir::Module& ir_; |
| |
| /// A hashmap of value to name |
| Hashmap<const core::ir::Value*, std::string, 32> names_; |
| |
| /// The buffer holding preamble text |
| TextBuffer preamble_buffer_; |
| |
| /// Unique name of the 'TINT_INVARIANT' preprocessor define. |
| /// Non-empty only if an invariant attribute has been generated. |
| std::string invariant_define_name_; |
| |
| std::unordered_set<const core::type::Struct*> emitted_structs_; |
| |
| /// The current function being emitted |
| core::ir::Function* current_function_ = nullptr; |
| /// The current block being emitted |
| core::ir::Block* current_block_ = nullptr; |
| |
| /// Unique name of the tint_array<T, N> template. |
| /// Non-empty only if the template has been generated. |
| std::string array_template_name_; |
| |
| /// The representation for an IR pointer type |
| enum class PtrKind { |
| kPtr, // IR pointer is represented in a pointer |
| kRef, // IR pointer is represented in a reference |
| }; |
| |
| /// The structure for a value held by a 'let', 'var' or parameter. |
| struct VariableValue { |
| Symbol name; // Name of the variable |
| PtrKind ptr_kind = PtrKind::kRef; |
| }; |
| |
| /// The structure for an inlined value |
| struct InlinedValue { |
| std::string expr; |
| PtrKind ptr_kind = PtrKind::kRef; |
| }; |
| |
| /// Empty struct used as a sentinel value to indicate that an string expression has been |
| /// consumed by its single place of usage. Attempting to use this value a second time should |
| /// result in an ICE. |
| struct ConsumedValue {}; |
| |
| using ValueBinding = std::variant<VariableValue, InlinedValue, ConsumedValue>; |
| |
| /// IR values to their representation |
| Hashmap<core::ir::Value*, ValueBinding, 32> bindings_; |
| |
| /// Values that can be inlined. |
| Hashset<core::ir::Value*, 64> can_inline_; |
| |
| /// Block to emit for a continuing |
| std::function<void()> emit_continuing_; |
| |
| /// @returns the name of the templated `tint_array` helper type, generating it if needed |
| const std::string& ArrayTemplateName() { |
| if (!array_template_name_.empty()) { |
| return array_template_name_; |
| } |
| |
| array_template_name_ = UniqueIdentifier("tint_array"); |
| |
| TINT_SCOPED_ASSIGNMENT(current_buffer_, &preamble_buffer_); |
| Line() << "template<typename T, size_t N>"; |
| Line() << "struct " << array_template_name_ << " {"; |
| |
| { |
| ScopedIndent si(current_buffer_); |
| Line() |
| << "const constant T& operator[](size_t i) const constant { return elements[i]; }"; |
| for (auto* space : {"device", "thread", "threadgroup"}) { |
| Line() << space << " T& operator[](size_t i) " << space |
| << " { return elements[i]; }"; |
| Line() << "const " << space << " T& operator[](size_t i) const " << space |
| << " { return elements[i]; }"; |
| } |
| Line() << "T elements[N];"; |
| } |
| Line() << "};"; |
| Line(); |
| |
| return array_template_name_; |
| } |
| |
| /// Emit the function |
| /// @param func the function to emit |
| void EmitFunction(core::ir::Function* func) { |
| TINT_SCOPED_ASSIGNMENT(current_function_, func); |
| |
| { |
| auto out = Line(); |
| |
| switch (func->Stage()) { |
| case core::ir::Function::PipelineStage::kCompute: |
| out << "kernel "; |
| break; |
| case core::ir::Function::PipelineStage::kFragment: |
| out << "fragment "; |
| break; |
| case core::ir::Function::PipelineStage::kVertex: |
| out << "vertex "; |
| break; |
| case core::ir::Function::PipelineStage::kUndefined: |
| break; |
| } |
| |
| // TODO(dsinclair): Handle return type attributes |
| |
| EmitType(out, func->ReturnType()); |
| out << " " << NameOf(func) << "("; |
| |
| size_t i = 0; |
| for (auto* param : func->Params()) { |
| if (i > 0) { |
| out << ", "; |
| } |
| ++i; |
| |
| // TODO(dsinclair): Handle parameter attributes |
| EmitType(out, param->Type()); |
| out << " "; |
| |
| // Non-entrypoint pointers are set to `const` for the value |
| if (func->Stage() == core::ir::Function::PipelineStage::kUndefined && |
| param->Type()->Is<core::type::Pointer>()) { |
| out << "const "; |
| } |
| |
| out << NameOf(param); |
| |
| if (param->Builtin().has_value()) { |
| out << " [["; |
| switch (param->Builtin().value()) { |
| case core::BuiltinValue::kFrontFacing: |
| out << "front_facing"; |
| break; |
| case core::BuiltinValue::kGlobalInvocationId: |
| out << "thread_position_in_grid"; |
| break; |
| case core::BuiltinValue::kLocalInvocationId: |
| out << "thread_position_in_threadgroup"; |
| break; |
| case core::BuiltinValue::kLocalInvocationIndex: |
| out << "thread_index_in_threadgroup"; |
| break; |
| case core::BuiltinValue::kNumWorkgroups: |
| out << "threadgroups_per_grid"; |
| break; |
| case core::BuiltinValue::kPosition: |
| out << "position"; |
| break; |
| case core::BuiltinValue::kSampleIndex: |
| out << "sample_id"; |
| break; |
| case core::BuiltinValue::kSampleMask: |
| out << "sample_mask"; |
| break; |
| case core::BuiltinValue::kWorkgroupId: |
| out << "threadgroup_position_in_grid"; |
| break; |
| |
| default: |
| break; |
| } |
| out << "]]"; |
| } |
| } |
| |
| out << ") {"; |
| } |
| { |
| ScopedIndent si(current_buffer_); |
| EmitBlock(func->Block()); |
| } |
| |
| Line() << "}"; |
| } |
| |
| /// Emit a block |
| /// @param block the block to emit |
| void EmitBlock(core::ir::Block* block) { EmitBlockInstructions(block); } |
| |
| /// Emit the instructions in a block |
| /// @param block the block with the instructions to emit |
| void EmitBlockInstructions(core::ir::Block* block) { |
| TINT_SCOPED_ASSIGNMENT(current_block_, block); |
| |
| for (auto* inst : *block) { |
| Switch( |
| inst, // |
| [&](core::ir::BreakIf* i) { EmitBreakIf(i); }, // |
| [&](core::ir::Continue*) { EmitContinue(); }, // |
| [&](core::ir::Discard*) { EmitDiscard(); }, // |
| [&](core::ir::ExitIf* i) { EmitExitIf(i); }, // |
| [&](core::ir::ExitLoop*) { EmitExitLoop(); }, // |
| [&](core::ir::ExitSwitch*) { EmitExitSwitch(); }, // |
| [&](core::ir::If* i) { EmitIf(i); }, // |
| [&](core::ir::Let* i) { EmitLet(i); }, // |
| [&](core::ir::Loop* i) { EmitLoop(i); }, // |
| [&](core::ir::NextIteration*) { /* do nothing */ }, // |
| [&](core::ir::Return* i) { EmitReturn(i); }, // |
| [&](core::ir::Store* i) { EmitStore(i); }, // |
| [&](core::ir::Switch* i) { EmitSwitch(i); }, // |
| [&](core::ir::Unreachable*) { EmitUnreachable(); }, // |
| [&](core::ir::Call* i) { EmitCallStmt(i); }, // |
| [&](core::ir::Var* i) { EmitVar(i); }, // |
| [&](core::ir::StoreVectorElement* e) { EmitStoreVectorElement(e); }, |
| [&](core::ir::TerminateInvocation*) { EmitDiscard(); }, // |
| |
| [&](core::ir::LoadVectorElement*) { /* inlined */ }, // |
| [&](core::ir::Swizzle*) { /* inlined */ }, // |
| [&](core::ir::Bitcast*) { /* inlined */ }, // |
| [&](core::ir::Unary*) { /* inlined */ }, // |
| [&](core::ir::Binary*) { /* inlined */ }, // |
| [&](core::ir::Load*) { /* inlined */ }, // |
| [&](core::ir::Construct*) { /* inlined */ }, // |
| [&](core::ir::Access*) { /* inlined */ }, // |
| TINT_ICE_ON_NO_MATCH); |
| } |
| } |
| |
| void EmitValue(StringStream& out, const core::ir::Value* v) { |
| Switch( |
| v, // |
| [&](const core::ir::Constant* c) { EmitConstant(out, c); }, // |
| [&](const core::ir::InstructionResult* r) { |
| Switch( |
| r->Instruction(), // |
| [&](const core::ir::Unary* u) { EmitUnary(out, u); }, // |
| [&](const core::ir::Binary* b) { EmitBinary(out, b); }, // |
| [&](const core::ir::Convert* b) { EmitConvert(out, b); }, // |
| [&](const core::ir::Let* l) { out << NameOf(l->Result(0)); }, // |
| [&](const core::ir::Load* l) { EmitValue(out, l->From()); }, // |
| [&](const core::ir::Construct* c) { EmitConstruct(out, c); }, // |
| [&](const core::ir::Var* var) { out << NameOf(var->Result(0)); }, // |
| [&](const core::ir::Bitcast* b) { EmitBitcast(out, b); }, // |
| [&](const core::ir::Access* a) { EmitAccess(out, a); }, // |
| [&](const msl::ir::BuiltinCall* c) { EmitMslBuiltinCall(out, c); }, // |
| [&](const core::ir::CoreBuiltinCall* c) { EmitCoreBuiltinCall(out, c); }, // |
| [&](const core::ir::UserCall* c) { EmitUserCall(out, c); }, // |
| [&](const core::ir::LoadVectorElement* e) { |
| EmitLoadVectorElement(out, e); |
| }, // |
| [&](const core::ir::Swizzle* s) { EmitSwizzle(out, s); }, // |
| TINT_ICE_ON_NO_MATCH); |
| }, // |
| [&](const core::ir::FunctionParam* p) { out << NameOf(p); }, // |
| TINT_ICE_ON_NO_MATCH); |
| } |
| |
| void EmitUnary(StringStream& out, const core::ir::Unary* u) { |
| switch (u->Op()) { |
| case core::ir::UnaryOp::kNegation: |
| out << "-"; |
| break; |
| case core::ir::UnaryOp::kComplement: |
| out << "~"; |
| break; |
| } |
| out << "("; |
| EmitValue(out, u->Val()); |
| out << ")"; |
| } |
| |
| /// Emit a binary instruction |
| /// @param b the binary instruction |
| void EmitBinary(StringStream& out, const core::ir::Binary* b) { |
| if (b->Op() == core::ir::BinaryOp::kEqual) { |
| auto* rhs = b->RHS()->As<core::ir::Constant>(); |
| if (rhs && rhs->Type()->Is<core::type::Bool>() && |
| rhs->Value()->ValueAs<bool>() == false) { |
| // expr == false |
| out << "!("; |
| EmitValue(out, b->LHS()); |
| out << ")"; |
| return; |
| } |
| } |
| |
| auto kind = [&] { |
| switch (b->Op()) { |
| case core::ir::BinaryOp::kAdd: |
| return "+"; |
| case core::ir::BinaryOp::kSubtract: |
| return "-"; |
| case core::ir::BinaryOp::kMultiply: |
| return "*"; |
| case core::ir::BinaryOp::kDivide: |
| return "/"; |
| case core::ir::BinaryOp::kModulo: |
| return "%"; |
| case core::ir::BinaryOp::kAnd: |
| return "&"; |
| case core::ir::BinaryOp::kOr: |
| return "|"; |
| case core::ir::BinaryOp::kXor: |
| return "^"; |
| case core::ir::BinaryOp::kEqual: |
| return "=="; |
| case core::ir::BinaryOp::kNotEqual: |
| return "!="; |
| case core::ir::BinaryOp::kLessThan: |
| return "<"; |
| case core::ir::BinaryOp::kGreaterThan: |
| return ">"; |
| case core::ir::BinaryOp::kLessThanEqual: |
| return "<="; |
| case core::ir::BinaryOp::kGreaterThanEqual: |
| return ">="; |
| case core::ir::BinaryOp::kShiftLeft: |
| return "<<"; |
| case core::ir::BinaryOp::kShiftRight: |
| return ">>"; |
| } |
| return "<error>"; |
| }; |
| |
| out << "("; |
| EmitValue(out, b->LHS()); |
| out << " " << kind() << " "; |
| EmitValue(out, b->RHS()); |
| out << ")"; |
| } |
| |
| /// Emit a convert instruction |
| /// @param c the convert instruction |
| void EmitConvert(StringStream& out, const core::ir::Convert* c) { |
| EmitType(out, c->Result(0)->Type()); |
| out << "("; |
| EmitValue(out, c->Operand(0)); |
| out << ")"; |
| } |
| |
| /// Emit a var instruction |
| /// @param v the var instruction |
| void EmitVar(core::ir::Var* v) { |
| auto out = Line(); |
| |
| auto* ptr = v->Result(0)->Type()->As<core::type::Pointer>(); |
| TINT_ASSERT_OR_RETURN(ptr); |
| |
| auto space = ptr->AddressSpace(); |
| switch (space) { |
| case core::AddressSpace::kFunction: |
| case core::AddressSpace::kHandle: |
| break; |
| case core::AddressSpace::kPrivate: |
| out << "thread "; |
| break; |
| case core::AddressSpace::kWorkgroup: |
| out << "threadgroup "; |
| break; |
| default: |
| TINT_IR_ICE(ir_) << "unhandled variable address space"; |
| return; |
| } |
| |
| EmitType(out, ptr->UnwrapPtr()); |
| out << " " << NameOf(v->Result(0)); |
| |
| if (v->Initializer()) { |
| out << " = "; |
| EmitValue(out, v->Initializer()); |
| } else if (space == core::AddressSpace::kPrivate || |
| space == core::AddressSpace::kFunction || |
| space == core::AddressSpace::kUndefined) { |
| out << " = "; |
| EmitZeroValue(out, ptr->UnwrapPtr()); |
| } |
| out << ";"; |
| } |
| |
| /// Emit a let instruction |
| /// @param l the let instruction |
| void EmitLet(core::ir::Let* l) { |
| auto out = Line(); |
| EmitType(out, l->Result(0)->Type()); |
| out << " const " << NameOf(l->Result(0)) << " = "; |
| EmitValue(out, l->Value()); |
| out << ";"; |
| } |
| |
| void EmitExitLoop() { Line() << "break;"; } |
| |
| void EmitBreakIf(core::ir::BreakIf* b) { |
| auto out = Line(); |
| out << "if "; |
| EmitValue(out, b->Condition()); |
| out << " { break; }"; |
| } |
| |
| void EmitContinue() { |
| if (emit_continuing_) { |
| emit_continuing_(); |
| } |
| Line() << "continue;"; |
| } |
| |
| void EmitLoop(core::ir::Loop* l) { |
| // Note, we can't just emit the continuing inside a conditional at the top of the loop |
| // because any variable declared in the block must be visible to the continuing. |
| // |
| // loop { |
| // var a = 3; |
| // continue { |
| // let y = a; |
| // } |
| // } |
| |
| auto emit_continuing = [&] { EmitBlock(l->Continuing()); }; |
| TINT_SCOPED_ASSIGNMENT(emit_continuing_, emit_continuing); |
| |
| Line() << "{"; |
| { |
| ScopedIndent init(current_buffer_); |
| EmitBlock(l->Initializer()); |
| |
| Line() << "while(true) {"; |
| { |
| ScopedIndent si(current_buffer_); |
| EmitBlock(l->Body()); |
| } |
| Line() << "}"; |
| } |
| Line() << "}"; |
| } |
| |
| void EmitExitSwitch() { Line() << "break;"; } |
| |
| void EmitSwitch(core::ir::Switch* s) { |
| { |
| auto out = Line(); |
| out << "switch("; |
| EmitValue(out, s->Condition()); |
| out << ") {"; |
| } |
| { |
| ScopedIndent blk(current_buffer_); |
| for (auto& case_ : s->Cases()) { |
| for (auto& sel : case_.selectors) { |
| if (sel.IsDefault()) { |
| Line() << "default:"; |
| } else { |
| auto out = Line(); |
| out << "case "; |
| EmitValue(out, sel.val); |
| out << ":"; |
| } |
| } |
| Line() << "{"; |
| { |
| ScopedIndent ci(current_buffer_); |
| EmitBlock(case_.block); |
| } |
| Line() << "}"; |
| } |
| } |
| Line() << "}"; |
| } |
| |
| void EmitSwizzle(StringStream& out, const core::ir::Swizzle* swizzle) { |
| EmitValue(out, swizzle->Object()); |
| out << "."; |
| for (const auto i : swizzle->Indices()) { |
| switch (i) { |
| case 0: |
| out << "x"; |
| break; |
| case 1: |
| out << "y"; |
| break; |
| case 2: |
| out << "z"; |
| break; |
| case 3: |
| out << "w"; |
| break; |
| default: |
| TINT_UNREACHABLE(); |
| } |
| } |
| } |
| |
| void EmitStoreVectorElement(const core::ir::StoreVectorElement* l) { |
| auto out = Line(); |
| |
| EmitValue(out, l->To()); |
| out << "["; |
| EmitValue(out, l->Index()); |
| out << "] = "; |
| EmitValue(out, l->Value()); |
| out << ";"; |
| } |
| |
| void EmitLoadVectorElement(StringStream& out, const core::ir::LoadVectorElement* l) { |
| EmitValue(out, l->From()); |
| out << "["; |
| EmitValue(out, l->Index()); |
| out << "]"; |
| } |
| |
| /// Emit an if instruction |
| /// @param if_ the if instruction |
| void EmitIf(core::ir::If* if_) { |
| { |
| auto out = Line(); |
| out << "if ("; |
| EmitValue(out, if_->Condition()); |
| out << ") {"; |
| } |
| |
| { |
| ScopedIndent si(current_buffer_); |
| EmitBlockInstructions(if_->True()); |
| } |
| |
| if (if_->False() && !if_->False()->IsEmpty()) { |
| Line() << "} else {"; |
| |
| ScopedIndent si(current_buffer_); |
| EmitBlockInstructions(if_->False()); |
| } |
| |
| Line() << "}"; |
| } |
| |
| /// Emit an exit-if instruction |
| /// @param e the exit-if instruction |
| void EmitExitIf(core::ir::ExitIf* e) { |
| auto results = e->If()->Results(); |
| auto args = e->Args(); |
| for (size_t i = 0; i < e->Args().Length(); ++i) { |
| auto* phi = results[i]; |
| auto* val = args[i]; |
| |
| auto out = Line(); |
| out << NameOf(phi) << " = "; |
| EmitValue(out, val); |
| out << ";"; |
| } |
| } |
| |
| /// Emit a return instruction |
| /// @param r the return instruction |
| void EmitReturn(core::ir::Return* r) { |
| // If this return has no arguments and the current block is for the function which is |
| // being returned, skip the return. |
| if (current_block_ == current_function_->Block() && r->Args().IsEmpty()) { |
| return; |
| } |
| |
| auto out = Line(); |
| out << "return"; |
| if (!r->Args().IsEmpty()) { |
| out << " "; |
| EmitValue(out, r->Args().Front()); |
| } |
| out << ";"; |
| } |
| |
| /// Emit an unreachable instruction |
| void EmitUnreachable() { Line() << "/* unreachable */"; } |
| |
| /// Emit a discard instruction |
| void EmitDiscard() { Line() << "discard_fragment();"; } |
| |
| /// Emit a store |
| void EmitStore(core::ir::Store* s) { |
| auto out = Line(); |
| |
| EmitValue(out, s->To()); |
| out << " = "; |
| EmitValue(out, s->From()); |
| out << ";"; |
| } |
| |
| /// Emit a bitcast instruction |
| void EmitBitcast(StringStream& out, const core::ir::Bitcast* b) { |
| out << "as_type<"; |
| EmitType(out, b->Result(0)->Type()); |
| out << ">("; |
| EmitValue(out, b->Val()); |
| out << ")"; |
| } |
| |
| /// Emit an accessor |
| void EmitAccess(StringStream& out, const core::ir::Access* a) { |
| EmitValue(out, a->Object()); |
| |
| auto* current_type = a->Object()->Type(); |
| for (auto* index : a->Indices()) { |
| TINT_ASSERT(current_type); |
| |
| current_type = current_type->UnwrapPtr(); |
| Switch( |
| current_type, // |
| [&](const core::type::Struct* s) { |
| auto* c = index->As<core::ir::Constant>(); |
| auto* member = s->Members()[c->Value()->ValueAs<uint32_t>()]; |
| out << "." << member->Name().Name(); |
| current_type = member->Type(); |
| }, |
| [&](Default) { |
| out << "["; |
| EmitValue(out, index); |
| out << "]"; |
| current_type = current_type->Element(0); |
| }); |
| } |
| } |
| |
| void EmitCallStmt(const core::ir::Call* c) { |
| if (!c->Result(0)->IsUsed()) { |
| auto out = Line(); |
| EmitValue(out, c->Result(0)); |
| out << ";"; |
| } |
| } |
| |
| void EmitMslBuiltinCall(StringStream& out, const msl::ir::BuiltinCall* c) { |
| switch (c->Func()) { |
| case msl::BuiltinFn::kThreadgroupBarrier: { |
| auto flags = c->Args()[0]->As<core::ir::Constant>()->Value()->ValueAs<uint8_t>(); |
| out << "threadgroup_barrier("; |
| bool emitted_flag = false; |
| |
| auto emit = [&](BarrierType type, const std::string& name) { |
| if ((flags & type) != type) { |
| return; |
| } |
| |
| if (emitted_flag) { |
| out << " | "; |
| } |
| emitted_flag = true; |
| out << "mem_flags::mem_" << name; |
| }; |
| emit(BarrierType::kDevice, "device"); |
| emit(BarrierType::kThreadGroup, "threadgroup"); |
| emit(BarrierType::kTexture, "texture"); |
| |
| out << ")"; |
| return; |
| } |
| default: |
| TINT_ICE() << "undefined MSL ir function"; |
| return; |
| } |
| } |
| |
| void EmitCoreBuiltinCall(StringStream& out, const core::ir::CoreBuiltinCall* c) { |
| EmitCoreBuiltinName(out, c->Func()); |
| out << "("; |
| |
| size_t i = 0; |
| for (const auto* arg : c->Args()) { |
| if (i > 0) { |
| out << ", "; |
| } |
| ++i; |
| |
| EmitValue(out, arg); |
| } |
| out << ")"; |
| } |
| |
| void EmitCoreBuiltinName(StringStream& out, core::BuiltinFn func) { |
| switch (func) { |
| case core::BuiltinFn::kAcos: |
| case core::BuiltinFn::kAcosh: |
| case core::BuiltinFn::kAll: |
| case core::BuiltinFn::kAny: |
| case core::BuiltinFn::kAsin: |
| case core::BuiltinFn::kAsinh: |
| case core::BuiltinFn::kAtan2: |
| case core::BuiltinFn::kAtan: |
| case core::BuiltinFn::kAtanh: |
| case core::BuiltinFn::kCeil: |
| case core::BuiltinFn::kClamp: |
| case core::BuiltinFn::kCos: |
| case core::BuiltinFn::kCosh: |
| case core::BuiltinFn::kCross: |
| case core::BuiltinFn::kDeterminant: |
| case core::BuiltinFn::kExp2: |
| case core::BuiltinFn::kExp: |
| case core::BuiltinFn::kFloor: |
| case core::BuiltinFn::kFma: |
| case core::BuiltinFn::kFract: |
| case core::BuiltinFn::kLdexp: |
| case core::BuiltinFn::kLog2: |
| case core::BuiltinFn::kLog: |
| case core::BuiltinFn::kMix: |
| case core::BuiltinFn::kNormalize: |
| case core::BuiltinFn::kPow: |
| case core::BuiltinFn::kReflect: |
| case core::BuiltinFn::kRefract: |
| case core::BuiltinFn::kSaturate: |
| case core::BuiltinFn::kSelect: |
| case core::BuiltinFn::kSign: |
| case core::BuiltinFn::kSin: |
| case core::BuiltinFn::kSinh: |
| case core::BuiltinFn::kSqrt: |
| case core::BuiltinFn::kStep: |
| case core::BuiltinFn::kTan: |
| case core::BuiltinFn::kTanh: |
| case core::BuiltinFn::kTranspose: |
| case core::BuiltinFn::kTrunc: |
| out << func; |
| break; |
| case core::BuiltinFn::kCountLeadingZeros: |
| out << "clz"; |
| break; |
| case core::BuiltinFn::kCountOneBits: |
| out << "popcount"; |
| break; |
| case core::BuiltinFn::kCountTrailingZeros: |
| out << "ctz"; |
| break; |
| case core::BuiltinFn::kDpdx: |
| case core::BuiltinFn::kDpdxCoarse: |
| case core::BuiltinFn::kDpdxFine: |
| out << "dfdx"; |
| break; |
| case core::BuiltinFn::kDpdy: |
| case core::BuiltinFn::kDpdyCoarse: |
| case core::BuiltinFn::kDpdyFine: |
| out << "dfdy"; |
| break; |
| case core::BuiltinFn::kExtractBits: |
| out << "extract_bits"; |
| break; |
| case core::BuiltinFn::kInsertBits: |
| out << "insert_bits"; |
| break; |
| case core::BuiltinFn::kFwidth: |
| case core::BuiltinFn::kFwidthCoarse: |
| case core::BuiltinFn::kFwidthFine: |
| out << "fwidth"; |
| break; |
| case core::BuiltinFn::kFaceForward: |
| out << "faceforward"; |
| break; |
| case core::BuiltinFn::kPack4X8Snorm: |
| out << "pack_float_to_snorm4x8"; |
| break; |
| case core::BuiltinFn::kPack4X8Unorm: |
| out << "pack_float_to_unorm4x8"; |
| break; |
| case core::BuiltinFn::kPack2X16Snorm: |
| out << "pack_float_to_snorm2x16"; |
| break; |
| case core::BuiltinFn::kPack2X16Unorm: |
| out << "pack_float_to_unorm2x16"; |
| break; |
| case core::BuiltinFn::kReverseBits: |
| out << "reverse_bits"; |
| break; |
| case core::BuiltinFn::kRound: |
| out << "rint"; |
| break; |
| case core::BuiltinFn::kSmoothstep: |
| out << "smoothstep"; |
| break; |
| case core::BuiltinFn::kInverseSqrt: |
| out << "rsqrt"; |
| break; |
| case core::BuiltinFn::kUnpack4X8Snorm: |
| out << "unpack_snorm4x8_to_float"; |
| break; |
| case core::BuiltinFn::kUnpack4X8Unorm: |
| out << "unpack_unorm4x8_to_float"; |
| break; |
| case core::BuiltinFn::kUnpack2X16Snorm: |
| out << "unpack_snorm2x16_to_float"; |
| break; |
| case core::BuiltinFn::kUnpack2X16Unorm: |
| out << "unpack_unorm2x16_to_float"; |
| break; |
| default: |
| TINT_UNREACHABLE() << "unhandled: " << func; |
| } |
| } |
| |
| /// Emits a user call instruction |
| void EmitUserCall(StringStream& out, const core::ir::UserCall* c) { |
| out << NameOf(c->Target()) << "("; |
| size_t i = 0; |
| for (const auto* arg : c->Args()) { |
| if (i > 0) { |
| out << ", "; |
| } |
| ++i; |
| |
| EmitValue(out, arg); |
| } |
| out << ")"; |
| } |
| |
| /// Emit a constructor |
| void EmitConstruct(StringStream& out, const core::ir::Construct* c) { |
| Switch( |
| c->Result(0)->Type(), |
| [&](const core::type::Array*) { |
| EmitType(out, c->Result(0)->Type()); |
| out << "{"; |
| size_t i = 0; |
| for (auto* arg : c->Args()) { |
| if (i > 0) { |
| out << ", "; |
| } |
| EmitValue(out, arg); |
| i++; |
| } |
| out << "}"; |
| }, |
| [&](const core::type::Struct* struct_ty) { |
| out << "{"; |
| size_t i = 0; |
| for (auto* arg : c->Args()) { |
| if (i > 0) { |
| out << ", "; |
| } |
| // Emit field designators for structures to account for padding members. |
| auto name = struct_ty->Members()[i]->Name().Name(); |
| out << "." << name << "="; |
| EmitValue(out, arg); |
| i++; |
| } |
| out << "}"; |
| }, |
| [&](Default) { |
| EmitType(out, c->Result(0)->Type()); |
| out << "("; |
| size_t i = 0; |
| for (auto* arg : c->Args()) { |
| if (i > 0) { |
| out << ", "; |
| } |
| EmitValue(out, arg); |
| i++; |
| } |
| out << ")"; |
| }); |
| } |
| |
| /// Handles generating a address space |
| /// @param out the output of the type stream |
| /// @param sc the address space to generate |
| void EmitAddressSpace(StringStream& out, core::AddressSpace sc) { |
| switch (sc) { |
| case core::AddressSpace::kFunction: |
| case core::AddressSpace::kPrivate: |
| case core::AddressSpace::kHandle: |
| out << "thread"; |
| break; |
| case core::AddressSpace::kWorkgroup: |
| out << "threadgroup"; |
| break; |
| case core::AddressSpace::kStorage: |
| out << "device"; |
| break; |
| case core::AddressSpace::kUniform: |
| out << "constant"; |
| break; |
| default: |
| TINT_IR_ICE(ir_) << "unhandled address space: " << sc; |
| break; |
| } |
| } |
| |
| /// Emit a type |
| /// @param out the stream to emit too |
| /// @param ty the type to emit |
| void EmitType(StringStream& out, const core::type::Type* ty) { |
| tint::Switch( |
| ty, // |
| [&](const core::type::Bool*) { out << "bool"; }, // |
| [&](const core::type::Void*) { out << "void"; }, // |
| [&](const core::type::F32*) { out << "float"; }, // |
| [&](const core::type::F16*) { out << "half"; }, // |
| [&](const core::type::I32*) { out << "int"; }, // |
| [&](const core::type::U32*) { out << "uint"; }, // |
| [&](const core::type::Array* arr) { EmitArrayType(out, arr); }, |
| [&](const core::type::Vector* vec) { EmitVectorType(out, vec); }, |
| [&](const core::type::Matrix* mat) { EmitMatrixType(out, mat); }, |
| [&](const core::type::Atomic* atomic) { EmitAtomicType(out, atomic); }, |
| [&](const core::type::Pointer* ptr) { EmitPointerType(out, ptr); }, |
| [&](const core::type::Sampler*) { out << "sampler"; }, // |
| [&](const core::type::Texture* tex) { EmitTextureType(out, tex); }, |
| [&](const core::type::Struct* str) { |
| out << StructName(str); |
| |
| TINT_SCOPED_ASSIGNMENT(current_buffer_, &preamble_buffer_); |
| EmitStructType(str); |
| }, // |
| TINT_ICE_ON_NO_MATCH); |
| } |
| |
| /// Handles generating a pointer declaration |
| /// @param out the output stream |
| /// @param ptr the pointer to emit |
| void EmitPointerType(StringStream& out, const core::type::Pointer* ptr) { |
| if (ptr->Access() == core::Access::kRead) { |
| out << "const "; |
| } |
| EmitAddressSpace(out, ptr->AddressSpace()); |
| out << " "; |
| EmitType(out, ptr->StoreType()); |
| out << "*"; |
| } |
| |
| /// Handles generating an atomic declaration |
| /// @param out the output stream |
| /// @param atomic the atomic to emit |
| void EmitAtomicType(StringStream& out, const core::type::Atomic* atomic) { |
| if (atomic->Type()->Is<core::type::I32>()) { |
| out << "atomic_int"; |
| return; |
| } |
| if (TINT_LIKELY(atomic->Type()->Is<core::type::U32>())) { |
| out << "atomic_uint"; |
| return; |
| } |
| TINT_ICE() << "unhandled atomic type " << atomic->Type()->FriendlyName(); |
| } |
| |
| /// Handles generating an array declaration |
| /// @param out the output stream |
| /// @param arr the array to emit |
| void EmitArrayType(StringStream& out, const core::type::Array* arr) { |
| out << ArrayTemplateName() << "<"; |
| EmitType(out, arr->ElemType()); |
| out << ", "; |
| if (arr->Count()->Is<core::type::RuntimeArrayCount>()) { |
| out << "1"; |
| } else { |
| auto count = arr->ConstantCount(); |
| if (!count) { |
| TINT_IR_ICE(ir_) << core::type::Array::kErrExpectedConstantCount; |
| return; |
| } |
| out << count.value(); |
| } |
| out << ">"; |
| } |
| |
| /// Handles generating a vector declaration |
| /// @param out the output stream |
| /// @param vec the vector to emit |
| void EmitVectorType(StringStream& out, const core::type::Vector* vec) { |
| if (vec->Packed()) { |
| out << "packed_"; |
| } |
| EmitType(out, vec->type()); |
| out << vec->Width(); |
| } |
| |
| /// Handles generating a matrix declaration |
| /// @param out the output stream |
| /// @param mat the matrix to emit |
| void EmitMatrixType(StringStream& out, const core::type::Matrix* mat) { |
| EmitType(out, mat->type()); |
| out << mat->columns() << "x" << mat->rows(); |
| } |
| |
| /// Handles generating a texture declaration |
| /// @param out the output stream |
| /// @param tex the texture to emit |
| void EmitTextureType(StringStream& out, const core::type::Texture* tex) { |
| if (TINT_UNLIKELY(tex->Is<core::type::ExternalTexture>())) { |
| TINT_IR_ICE(ir_) << "Multiplanar external texture transform was not run."; |
| return; |
| } |
| |
| if (tex->IsAnyOf<core::type::DepthTexture, core::type::DepthMultisampledTexture>()) { |
| out << "depth"; |
| } else { |
| out << "texture"; |
| } |
| |
| switch (tex->dim()) { |
| case core::type::TextureDimension::k1d: |
| out << "1d"; |
| break; |
| case core::type::TextureDimension::k2d: |
| out << "2d"; |
| break; |
| case core::type::TextureDimension::k2dArray: |
| out << "2d_array"; |
| break; |
| case core::type::TextureDimension::k3d: |
| out << "3d"; |
| break; |
| case core::type::TextureDimension::kCube: |
| out << "cube"; |
| break; |
| case core::type::TextureDimension::kCubeArray: |
| out << "cube_array"; |
| break; |
| default: |
| TINT_IR_ICE(ir_) << "invalid texture dimensions"; |
| return; |
| } |
| if (tex->IsAnyOf<core::type::MultisampledTexture, core::type::DepthMultisampledTexture>()) { |
| out << "_ms"; |
| } |
| out << "<"; |
| TINT_DEFER(out << ">"); |
| |
| tint::Switch( |
| tex, // |
| [&](const core::type::DepthTexture*) { out << "float, access::sample"; }, |
| [&](const core::type::DepthMultisampledTexture*) { out << "float, access::read"; }, |
| [&](const core::type::StorageTexture* storage) { |
| EmitType(out, storage->type()); |
| out << ", "; |
| |
| std::string access_str; |
| if (storage->access() == core::Access::kRead) { |
| out << "access::read"; |
| } else if (storage->access() == core::Access::kWrite) { |
| out << "access::write"; |
| } else { |
| TINT_IR_ICE(ir_) << "invalid access control for storage texture"; |
| return; |
| } |
| }, |
| [&](const core::type::MultisampledTexture* ms) { |
| EmitType(out, ms->type()); |
| out << ", access::read"; |
| }, |
| [&](const core::type::SampledTexture* sampled) { |
| EmitType(out, sampled->type()); |
| out << ", access::sample"; |
| }, // |
| TINT_ICE_ON_NO_MATCH); |
| } |
| |
| /// Handles generating a struct declaration. If the structure has already been emitted, then |
| /// this function will simply return without emitting anything. |
| /// @param str the struct to generate |
| void EmitStructType(const core::type::Struct* str) { |
| auto it = emitted_structs_.emplace(str); |
| if (!it.second) { |
| return; |
| } |
| |
| // This does not append directly to the preamble because a struct may require other |
| // structs, or the array template, to get emitted before it. So, the struct emits into a |
| // temporary text buffer, then anything it depends on will emit to the preamble first, |
| // and then it copies the text buffer into the preamble. |
| TextBuffer str_buf; |
| Line(&str_buf) << "struct " << StructName(str) << " {"; |
| |
| bool is_host_shareable = str->IsHostShareable(); |
| |
| // Emits a `/* 0xnnnn */` byte offset comment for a struct member. |
| auto add_byte_offset_comment = [&](StringStream& out, uint32_t offset) { |
| std::ios_base::fmtflags saved_flag_state(out.flags()); |
| out << "/* 0x" << std::hex << std::setfill('0') << std::setw(4) << offset << " */ "; |
| out.flags(saved_flag_state); |
| }; |
| |
| auto add_padding = [&](uint32_t size, uint32_t msl_offset) { |
| std::string name; |
| do { |
| name = UniqueIdentifier("tint_pad"); |
| } while (str->FindMember(ir_.symbols.Get(name))); |
| |
| auto out = Line(&str_buf); |
| add_byte_offset_comment(out, msl_offset); |
| out << ArrayTemplateName() << "<int8_t, " << size << "> " << name << ";"; |
| }; |
| |
| str_buf.IncrementIndent(); |
| |
| uint32_t msl_offset = 0; |
| for (auto* mem : str->Members()) { |
| auto out = Line(&str_buf); |
| auto mem_name = mem->Name().Name(); |
| auto ir_offset = mem->Offset(); |
| |
| if (is_host_shareable) { |
| if (TINT_UNLIKELY(ir_offset < msl_offset)) { |
| // Unimplementable layout |
| TINT_IR_ICE(ir_) << "Structure member offset (" << ir_offset |
| << ") is behind MSL offset (" << msl_offset << ")"; |
| return; |
| } |
| |
| // Generate padding if required |
| if (auto padding = ir_offset - msl_offset) { |
| add_padding(padding, msl_offset); |
| msl_offset += padding; |
| } |
| |
| add_byte_offset_comment(out, msl_offset); |
| } |
| |
| auto* ty = mem->Type(); |
| |
| EmitType(out, ty); |
| out << " " << mem_name; |
| |
| // Emit attributes |
| auto& attributes = mem->Attributes(); |
| |
| if (auto builtin = attributes.builtin) { |
| auto name = BuiltinToAttribute(builtin.value()); |
| if (name.empty()) { |
| TINT_IR_ICE(ir_) << "unknown builtin"; |
| return; |
| } |
| out << " [[" << name << "]]"; |
| } |
| |
| if (auto location = attributes.location) { |
| auto& pipeline_stage_uses = str->PipelineStageUses(); |
| if (TINT_UNLIKELY(pipeline_stage_uses.size() != 1)) { |
| TINT_IR_ICE(ir_) << "invalid entry point IO struct uses"; |
| return; |
| } |
| |
| if (pipeline_stage_uses.count(core::type::PipelineStageUsage::kVertexInput)) { |
| out << " [[attribute(" + std::to_string(location.value()) + ")]]"; |
| } else if (pipeline_stage_uses.count( |
| core::type::PipelineStageUsage::kVertexOutput)) { |
| out << " [[user(locn" + std::to_string(location.value()) + ")]]"; |
| } else if (pipeline_stage_uses.count( |
| core::type::PipelineStageUsage::kFragmentInput)) { |
| out << " [[user(locn" + std::to_string(location.value()) + ")]]"; |
| } else if (TINT_LIKELY(pipeline_stage_uses.count( |
| core::type::PipelineStageUsage::kFragmentOutput))) { |
| out << " [[color(" + std::to_string(location.value()) + ")]]"; |
| } else { |
| TINT_IR_ICE(ir_) << "invalid use of location decoration"; |
| return; |
| } |
| } |
| |
| if (auto interpolation = attributes.interpolation) { |
| auto name = InterpolationToAttribute(interpolation->type, interpolation->sampling); |
| if (name.empty()) { |
| TINT_IR_ICE(ir_) << "unknown interpolation attribute"; |
| return; |
| } |
| out << " [[" << name << "]]"; |
| } |
| |
| if (attributes.invariant) { |
| invariant_define_name_ = UniqueIdentifier("TINT_INVARIANT"); |
| out << " " << invariant_define_name_; |
| } |
| |
| out << ";"; |
| |
| if (is_host_shareable) { |
| // Calculate new MSL offset |
| auto size_align = MslPackedTypeSizeAndAlign(ty); |
| if (TINT_UNLIKELY(msl_offset % size_align.align)) { |
| TINT_IR_ICE(ir_) << "Misaligned MSL structure member " << mem_name << " : " |
| << ty->FriendlyName() << " offset: " << msl_offset |
| << " align: " << size_align.align; |
| return; |
| } |
| msl_offset += size_align.size; |
| } |
| } |
| |
| if (is_host_shareable && str->Size() != msl_offset) { |
| add_padding(str->Size() - msl_offset, msl_offset); |
| } |
| |
| str_buf.DecrementIndent(); |
| Line(&str_buf) << "};"; |
| |
| preamble_buffer_.Append(str_buf); |
| } |
| |
| /// Handles core::ir::Constant values |
| /// @param out the stream to write the constant too |
| /// @param c the constant to emit |
| void EmitConstant(StringStream& out, const core::ir::Constant* c) { |
| EmitConstant(out, c->Value()); |
| } |
| |
| /// Handles core::constant::Value values |
| /// @param out the stream to write the constant too |
| /// @param c the constant to emit |
| void EmitConstant(StringStream& out, const core::constant::Value* c) { |
| auto emit_values = [&](uint32_t count) { |
| for (size_t i = 0; i < count; i++) { |
| if (i > 0) { |
| out << ", "; |
| } |
| EmitConstant(out, c->Index(i)); |
| } |
| }; |
| |
| tint::Switch( |
| c->Type(), // |
| [&](const core::type::Bool*) { out << (c->ValueAs<bool>() ? "true" : "false"); }, |
| [&](const core::type::I32*) { PrintI32(out, c->ValueAs<i32>()); }, |
| [&](const core::type::U32*) { out << c->ValueAs<u32>() << "u"; }, |
| [&](const core::type::F32*) { PrintF32(out, c->ValueAs<f32>()); }, |
| [&](const core::type::F16*) { PrintF16(out, c->ValueAs<f16>()); }, |
| [&](const core::type::Vector* v) { |
| EmitType(out, v); |
| |
| ScopedParen sp(out); |
| if (auto* splat = c->As<core::constant::Splat>()) { |
| EmitConstant(out, splat->el); |
| return; |
| } |
| emit_values(v->Width()); |
| }, |
| [&](const core::type::Matrix* m) { |
| EmitType(out, m); |
| ScopedParen sp(out); |
| emit_values(m->columns()); |
| }, |
| [&](const core::type::Array* a) { |
| EmitType(out, a); |
| out << "{"; |
| TINT_DEFER(out << "}"); |
| |
| if (c->AllZero()) { |
| return; |
| } |
| |
| auto count = a->ConstantCount(); |
| if (!count) { |
| TINT_IR_ICE(ir_) << core::type::Array::kErrExpectedConstantCount; |
| return; |
| } |
| emit_values(*count); |
| }, |
| [&](const core::type::Struct* s) { |
| EmitStructType(s); |
| out << StructName(s) << "{"; |
| TINT_DEFER(out << "}"); |
| |
| if (c->AllZero()) { |
| return; |
| } |
| |
| auto members = s->Members(); |
| for (size_t i = 0; i < members.Length(); i++) { |
| if (i > 0) { |
| out << ", "; |
| } |
| out << "." << members[i]->Name().Name() << "="; |
| EmitConstant(out, c->Index(i)); |
| } |
| }, // |
| TINT_ICE_ON_NO_MATCH); |
| } |
| |
| /// Emits the zero value for the given type |
| /// @param out the stream to emit too |
| /// @param ty the type |
| void EmitZeroValue(StringStream& out, const core::type::Type* ty) { |
| Switch( |
| ty, [&](const core::type::Bool*) { out << "false"; }, // |
| [&](const core::type::F16*) { out << "0.0h"; }, // |
| [&](const core::type::F32*) { out << "0.0f"; }, // |
| [&](const core::type::I32*) { out << "0"; }, // |
| [&](const core::type::U32*) { out << "0u"; }, // |
| [&](const core::type::Vector* vec) { EmitZeroValue(out, vec->type()); }, // |
| [&](const core::type::Matrix* mat) { |
| EmitType(out, mat); |
| |
| ScopedParen sp(out); |
| EmitZeroValue(out, mat->type()); |
| }, |
| [&](const core::type::Array*) { out << "{}"; }, // |
| [&](const core::type::Struct*) { out << "{}"; }, // |
| TINT_ICE_ON_NO_MATCH); |
| } |
| |
| /// @param s the structure |
| /// @returns the name of the structure, taking special care of builtin structures that start |
| /// with double underscores. If the structure is a builtin, then the returned name will be a |
| /// unique name without the leading underscores. |
| std::string StructName(const core::type::Struct* s) { |
| auto name = s->Name().Name(); |
| if (HasPrefix(name, "__")) { |
| name = tint::GetOrCreate(builtin_struct_names_, s, |
| [&] { return UniqueIdentifier(name.substr(2)); }); |
| } |
| return name; |
| } |
| |
| /// @param value the value to get the name of |
| /// @returns the name of the given value, creating a new unique name if the value is unnamed in |
| /// the module. |
| std::string NameOf(const core::ir::Value* value) { |
| return names_.GetOrCreate(value, [&] { |
| if (auto sym = ir_.NameOf(value); sym.IsValid()) { |
| return sym.Name(); |
| } |
| return UniqueIdentifier("v"); |
| }); |
| } |
| |
| /// @return a new, unique identifier with the given prefix. |
| /// @param prefix optional prefix to apply to the generated identifier. If empty |
| /// "tint_symbol" will be used. |
| std::string UniqueIdentifier(const std::string& prefix /* = "" */) { |
| return ir_.symbols.New(prefix).Name(); |
| } |
| }; |
| |
| } // namespace |
| |
| Result<std::string> Print(core::ir::Module& module) { |
| return Printer{module}.Generate(); |
| } |
| |
| } // namespace tint::msl::writer |
