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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <array>
#include <string_view>
#include <fmt/format.h>
#include "common/common_types.h"
#include "shader_recompiler/backend/spirv/emit_context.h"
namespace Shader::Backend::SPIRV {
void VectorTypes::Define(Sirit::Module& sirit_ctx, Id base_type, std::string_view name) {
defs[0] = sirit_ctx.Name(base_type, name);
std::array<char, 6> def_name;
for (int i = 1; i < 4; ++i) {
const std::string_view def_name_view(
def_name.data(),
fmt::format_to_n(def_name.data(), def_name.size(), "{}x{}", name, i + 1).size);
defs[i] = sirit_ctx.Name(sirit_ctx.TypeVector(base_type, i + 1), def_name_view);
}
}
EmitContext::EmitContext(IR::Program& program) : Sirit::Module(0x00010000) {
AddCapability(spv::Capability::Shader);
DefineCommonTypes(program.info);
DefineCommonConstants();
DefineSpecialVariables(program.info);
u32 binding{};
DefineConstantBuffers(program.info, binding);
DefineStorageBuffers(program.info, binding);
DefineLabels(program);
}
EmitContext::~EmitContext() = default;
Id EmitContext::Def(const IR::Value& value) {
if (!value.IsImmediate()) {
return value.Inst()->Definition<Id>();
}
switch (value.Type()) {
case IR::Type::U1:
return value.U1() ? true_value : false_value;
case IR::Type::U32:
return Constant(U32[1], value.U32());
case IR::Type::F32:
return Constant(F32[1], value.F32());
default:
throw NotImplementedException("Immediate type {}", value.Type());
}
}
void EmitContext::DefineCommonTypes(const Info& info) {
void_id = TypeVoid();
U1 = Name(TypeBool(), "u1");
// TODO: Conditionally define these
AddCapability(spv::Capability::Int16);
AddCapability(spv::Capability::Int64);
U16 = Name(TypeInt(16, false), "u16");
U64 = Name(TypeInt(64, false), "u64");
F32.Define(*this, TypeFloat(32), "f32");
U32.Define(*this, TypeInt(32, false), "u32");
if (info.uses_fp16) {
AddCapability(spv::Capability::Float16);
F16.Define(*this, TypeFloat(16), "f16");
}
if (info.uses_fp64) {
AddCapability(spv::Capability::Float64);
F64.Define(*this, TypeFloat(64), "f64");
}
}
void EmitContext::DefineCommonConstants() {
true_value = ConstantTrue(U1);
false_value = ConstantFalse(U1);
u32_zero_value = Constant(U32[1], 0U);
}
void EmitContext::DefineSpecialVariables(const Info& info) {
const auto define{[this](Id type, spv::BuiltIn builtin, spv::StorageClass storage_class) {
const Id pointer_type{TypePointer(storage_class, type)};
const Id id{AddGlobalVariable(pointer_type, spv::StorageClass::Input)};
Decorate(id, spv::Decoration::BuiltIn, builtin);
return id;
}};
using namespace std::placeholders;
const auto define_input{std::bind(define, _1, _2, spv::StorageClass::Input)};
if (info.uses_workgroup_id) {
workgroup_id = define_input(U32[3], spv::BuiltIn::WorkgroupId);
}
if (info.uses_local_invocation_id) {
local_invocation_id = define_input(U32[3], spv::BuiltIn::LocalInvocationId);
}
}
void EmitContext::DefineConstantBuffers(const Info& info, u32& binding) {
if (info.constant_buffer_descriptors.empty()) {
return;
}
const Id array_type{TypeArray(U32[1], Constant(U32[1], 4096))};
Decorate(array_type, spv::Decoration::ArrayStride, 4U);
const Id struct_type{TypeStruct(array_type)};
Name(struct_type, "cbuf_block");
Decorate(struct_type, spv::Decoration::Block);
MemberName(struct_type, 0, "data");
MemberDecorate(struct_type, 0, spv::Decoration::Offset, 0U);
const Id uniform_type{TypePointer(spv::StorageClass::Uniform, struct_type)};
uniform_u32 = TypePointer(spv::StorageClass::Uniform, U32[1]);
u32 index{};
for (const Info::ConstantBufferDescriptor& desc : info.constant_buffer_descriptors) {
const Id id{AddGlobalVariable(uniform_type, spv::StorageClass::Uniform)};
Decorate(id, spv::Decoration::Binding, binding);
Decorate(id, spv::Decoration::DescriptorSet, 0U);
Name(id, fmt::format("c{}", desc.index));
std::fill_n(cbufs.data() + desc.index, desc.count, id);
index += desc.count;
binding += desc.count;
}
}
void EmitContext::DefineStorageBuffers(const Info& info, u32& binding) {
if (info.storage_buffers_descriptors.empty()) {
return;
}
AddExtension("SPV_KHR_storage_buffer_storage_class");
const Id array_type{TypeRuntimeArray(U32[1])};
Decorate(array_type, spv::Decoration::ArrayStride, 4U);
const Id struct_type{TypeStruct(array_type)};
Name(struct_type, "ssbo_block");
Decorate(struct_type, spv::Decoration::Block);
MemberName(struct_type, 0, "data");
MemberDecorate(struct_type, 0, spv::Decoration::Offset, 0U);
const Id storage_type{TypePointer(spv::StorageClass::StorageBuffer, struct_type)};
storage_u32 = TypePointer(spv::StorageClass::StorageBuffer, U32[1]);
u32 index{};
for (const Info::StorageBufferDescriptor& desc : info.storage_buffers_descriptors) {
const Id id{AddGlobalVariable(storage_type, spv::StorageClass::StorageBuffer)};
Decorate(id, spv::Decoration::Binding, binding);
Decorate(id, spv::Decoration::DescriptorSet, 0U);
Name(id, fmt::format("ssbo{}", index));
std::fill_n(ssbos.data() + index, desc.count, id);
index += desc.count;
binding += desc.count;
}
}
void EmitContext::DefineLabels(IR::Program& program) {
for (const IR::Function& function : program.functions) {
for (IR::Block* const block : function.blocks) {
block->SetDefinition(OpLabel());
}
}
}
} // namespace Shader::Backend::SPIRV
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