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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <numeric>
#include <type_traits>
#include "shader_recompiler/backend/spirv/emit_spirv.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/function.h"
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/ir/program.h"
namespace Shader::Backend::SPIRV {
namespace {
template <class Func>
struct FuncTraits : FuncTraits<decltype(&Func::operator())> {};
template <class ClassType, class ReturnType_, class... Args>
struct FuncTraits<ReturnType_ (ClassType::*)(Args...)> {
using ReturnType = ReturnType_;
static constexpr size_t NUM_ARGS = sizeof...(Args);
template <size_t I>
using ArgType = std::tuple_element_t<I, std::tuple<Args...>>;
};
template <auto method, typename... Args>
void SetDefinition(EmitSPIRV& emit, EmitContext& ctx, IR::Inst* inst, Args... args) {
const Id forward_id{inst->Definition<Id>()};
const bool has_forward_id{Sirit::ValidId(forward_id)};
Id current_id{};
if (has_forward_id) {
current_id = ctx.ExchangeCurrentId(forward_id);
}
const Id new_id{(emit.*method)(ctx, std::forward<Args>(args)...)};
if (has_forward_id) {
ctx.ExchangeCurrentId(current_id);
} else {
inst->SetDefinition<Id>(new_id);
}
}
template <typename ArgType>
ArgType Arg(EmitContext& ctx, const IR::Value& arg) {
if constexpr (std::is_same_v<ArgType, Id>) {
return ctx.Def(arg);
} else if constexpr (std::is_same_v<ArgType, const IR::Value&>) {
return arg;
} else if constexpr (std::is_same_v<ArgType, u32>) {
return arg.U32();
} else if constexpr (std::is_same_v<ArgType, IR::Block*>) {
return arg.Label();
}
}
template <auto method, bool is_first_arg_inst, size_t... I>
void Invoke(EmitSPIRV& emit, EmitContext& ctx, IR::Inst* inst, std::index_sequence<I...>) {
using Traits = FuncTraits<decltype(method)>;
if constexpr (std::is_same_v<Traits::ReturnType, Id>) {
if constexpr (is_first_arg_inst) {
SetDefinition<method>(emit, ctx, inst, inst,
Arg<Traits::ArgType<I + 2>>(ctx, inst->Arg(I))...);
} else {
SetDefinition<method>(emit, ctx, inst,
Arg<Traits::ArgType<I + 1>>(ctx, inst->Arg(I))...);
}
} else {
if constexpr (is_first_arg_inst) {
(emit.*method)(ctx, inst, Arg<Traits::ArgType<I + 2>>(ctx, inst->Arg(I))...);
} else {
(emit.*method)(ctx, Arg<Traits::ArgType<I + 1>>(ctx, inst->Arg(I))...);
}
}
}
template <auto method>
void Invoke(EmitSPIRV& emit, EmitContext& ctx, IR::Inst* inst) {
using Traits = FuncTraits<decltype(method)>;
static_assert(Traits::NUM_ARGS >= 1, "Insufficient arguments");
if constexpr (Traits::NUM_ARGS == 1) {
Invoke<method, false>(emit, ctx, inst, std::make_index_sequence<0>{});
} else {
using FirstArgType = typename Traits::template ArgType<1>;
static constexpr bool is_first_arg_inst = std::is_same_v<FirstArgType, IR::Inst*>;
using Indices = std::make_index_sequence<Traits::NUM_ARGS - (is_first_arg_inst ? 2 : 1)>;
Invoke<method, is_first_arg_inst>(emit, ctx, inst, Indices{});
}
}
} // Anonymous namespace
EmitSPIRV::EmitSPIRV(IR::Program& program) {
EmitContext ctx{program};
const Id void_function{ctx.TypeFunction(ctx.void_id)};
// FIXME: Forward declare functions (needs sirit support)
Id func{};
for (IR::Function& function : program.functions) {
func = ctx.OpFunction(ctx.void_id, spv::FunctionControlMask::MaskNone, void_function);
for (IR::Block* const block : function.blocks) {
ctx.AddLabel(block->Definition<Id>());
for (IR::Inst& inst : block->Instructions()) {
EmitInst(ctx, &inst);
}
}
ctx.OpFunctionEnd();
}
boost::container::small_vector<Id, 32> interfaces;
if (program.info.uses_workgroup_id) {
interfaces.push_back(ctx.workgroup_id);
}
if (program.info.uses_local_invocation_id) {
interfaces.push_back(ctx.local_invocation_id);
}
const std::span interfaces_span(interfaces.data(), interfaces.size());
ctx.AddEntryPoint(spv::ExecutionModel::Fragment, func, "main", interfaces_span);
ctx.AddExecutionMode(func, spv::ExecutionMode::OriginUpperLeft);
std::vector<u32> result{ctx.Assemble()};
std::FILE* file{std::fopen("D:\\shader.spv", "wb")};
std::fwrite(result.data(), sizeof(u32), result.size(), file);
std::fclose(file);
std::system("spirv-dis D:\\shader.spv") == 0 &&
std::system("spirv-val --uniform-buffer-standard-layout D:\\shader.spv") == 0 &&
std::system("spirv-cross -V D:\\shader.spv") == 0;
}
void EmitSPIRV::EmitInst(EmitContext& ctx, IR::Inst* inst) {
switch (inst->Opcode()) {
#define OPCODE(name, result_type, ...) \
case IR::Opcode::name: \
return Invoke<&EmitSPIRV::Emit##name>(*this, ctx, inst);
#include "shader_recompiler/frontend/ir/opcodes.inc"
#undef OPCODE
}
throw LogicError("Invalid opcode {}", inst->Opcode());
}
static Id TypeId(const EmitContext& ctx, IR::Type type) {
switch (type) {
case IR::Type::U1:
return ctx.U1;
case IR::Type::U32:
return ctx.U32[1];
default:
throw NotImplementedException("Phi node type {}", type);
}
}
Id EmitSPIRV::EmitPhi(EmitContext& ctx, IR::Inst* inst) {
const size_t num_args{inst->NumArgs()};
boost::container::small_vector<Id, 32> operands;
operands.reserve(num_args * 2);
for (size_t index = 0; index < num_args; ++index) {
// Phi nodes can have forward declarations, if an argument is not defined provide a forward
// declaration of it. Invoke will take care of giving it the right definition when it's
// actually defined.
const IR::Value arg{inst->Arg(index)};
Id def{};
if (arg.IsImmediate()) {
// Let the context handle immediate definitions, as it already knows how
def = ctx.Def(arg);
} else {
IR::Inst* const arg_inst{arg.Inst()};
def = arg_inst->Definition<Id>();
if (!Sirit::ValidId(def)) {
// If it hasn't been defined, get a forward declaration
def = ctx.ForwardDeclarationId();
arg_inst->SetDefinition<Id>(def);
}
}
IR::Block* const phi_block{inst->PhiBlock(index)};
operands.push_back(def);
operands.push_back(phi_block->Definition<Id>());
}
const Id result_type{TypeId(ctx, inst->Arg(0).Type())};
return ctx.OpPhi(result_type, std::span(operands.data(), operands.size()));
}
void EmitSPIRV::EmitVoid(EmitContext&) {}
void EmitSPIRV::EmitIdentity(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSPIRV::EmitGetZeroFromOp(EmitContext&) {
throw LogicError("Unreachable instruction");
}
void EmitSPIRV::EmitGetSignFromOp(EmitContext&) {
throw LogicError("Unreachable instruction");
}
void EmitSPIRV::EmitGetCarryFromOp(EmitContext&) {
throw LogicError("Unreachable instruction");
}
void EmitSPIRV::EmitGetOverflowFromOp(EmitContext&) {
throw LogicError("Unreachable instruction");
}
} // namespace Shader::Backend::SPIRV
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