// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <tuple>
#include "shader_recompiler/backend/spirv/emit_spirv.h"
#pragma optimize("", off)
namespace Shader::Backend::SPIRV {
namespace {
struct AttrInfo {
Id pointer;
Id id;
bool needs_cast;
};
std::optional<AttrInfo> AttrTypes(EmitContext& ctx, u32 index) {
const AttributeType type{ctx.profile.generic_input_types.at(index)};
switch (type) {
case AttributeType::Float:
return AttrInfo{ctx.input_f32, ctx.F32[1], false};
case AttributeType::UnsignedInt:
return AttrInfo{ctx.input_u32, ctx.U32[1], true};
case AttributeType::SignedInt:
return AttrInfo{ctx.input_s32, ctx.TypeInt(32, true), true};
case AttributeType::Disabled:
return std::nullopt;
}
throw InvalidArgument("Invalid attribute type {}", type);
}
Id OutputAttrPointer(EmitContext& ctx, IR::Attribute attr) {
const u32 element{static_cast<u32>(attr) % 4};
const auto element_id{[&] { return ctx.Constant(ctx.U32[1], element); }};
if (IR::IsGeneric(attr)) {
const u32 index{IR::GenericAttributeIndex(attr)};
return ctx.OpAccessChain(ctx.output_f32, ctx.output_generics.at(index), element_id());
}
switch (attr) {
case IR::Attribute::PositionX:
case IR::Attribute::PositionY:
case IR::Attribute::PositionZ:
case IR::Attribute::PositionW:
return ctx.OpAccessChain(ctx.output_f32, ctx.output_position, element_id());
default:
throw NotImplementedException("Read attribute {}", attr);
}
}
} // Anonymous namespace
void EmitGetRegister(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSetRegister(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitGetPred(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSetPred(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSetGotoVariable(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitGetGotoVariable(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
static Id GetCbuf(EmitContext& ctx, Id result_type, Id UniformDefinitions::*member_ptr,
u32 element_size, const IR::Value& binding, const IR::Value& offset) {
if (!binding.IsImmediate()) {
throw NotImplementedException("Constant buffer indexing");
}
const Id cbuf{ctx.cbufs[binding.U32()].*member_ptr};
const Id uniform_type{ctx.uniform_types.*member_ptr};
if (!offset.IsImmediate()) {
Id index{ctx.Def(offset)};
if (element_size > 1) {
const u32 log2_element_size{static_cast<u32>(std::countr_zero(element_size))};
const Id shift{ctx.Constant(ctx.U32[1], log2_element_size)};
index = ctx.OpShiftRightArithmetic(ctx.U32[1], ctx.Def(offset), shift);
}
const Id access_chain{ctx.OpAccessChain(uniform_type, cbuf, ctx.u32_zero_value, index)};
return ctx.OpLoad(result_type, access_chain);
}
if (offset.U32() % element_size != 0) {
throw NotImplementedException("Unaligned immediate constant buffer load");
}
const Id imm_offset{ctx.Constant(ctx.U32[1], offset.U32() / element_size)};
const Id access_chain{ctx.OpAccessChain(uniform_type, cbuf, ctx.u32_zero_value, imm_offset)};
return ctx.OpLoad(result_type, access_chain);
}
Id EmitGetCbufU8(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset) {
const Id load{GetCbuf(ctx, ctx.U8, &UniformDefinitions::U8, sizeof(u8), binding, offset)};
return ctx.OpUConvert(ctx.U32[1], load);
}
Id EmitGetCbufS8(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset) {
const Id load{GetCbuf(ctx, ctx.S8, &UniformDefinitions::S8, sizeof(s8), binding, offset)};
return ctx.OpSConvert(ctx.U32[1], load);
}
Id EmitGetCbufU16(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset) {
const Id load{GetCbuf(ctx, ctx.U16, &UniformDefinitions::U16, sizeof(u16), binding, offset)};
return ctx.OpUConvert(ctx.U32[1], load);
}
Id EmitGetCbufS16(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset) {
const Id load{GetCbuf(ctx, ctx.S16, &UniformDefinitions::S16, sizeof(s16), binding, offset)};
return ctx.OpSConvert(ctx.U32[1], load);
}
Id EmitGetCbufU32(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset) {
return GetCbuf(ctx, ctx.U32[1], &UniformDefinitions::U32, sizeof(u32), binding, offset);
}
Id EmitGetCbufF32(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset) {
return GetCbuf(ctx, ctx.F32[1], &UniformDefinitions::F32, sizeof(f32), binding, offset);
}
Id EmitGetCbufU64(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset) {
return GetCbuf(ctx, ctx.U64, &UniformDefinitions::U64, sizeof(u64), binding, offset);
}
Id EmitGetAttribute(EmitContext& ctx, IR::Attribute attr) {
const u32 element{static_cast<u32>(attr) % 4};
const auto element_id{[&] { return ctx.Constant(ctx.U32[1], element); }};
if (IR::IsGeneric(attr)) {
const u32 index{IR::GenericAttributeIndex(attr)};
const std::optional<AttrInfo> type{AttrTypes(ctx, index)};
if (!type) {
// Attribute is disabled
return ctx.Constant(ctx.F32[1], 0.0f);
}
const Id generic_id{ctx.input_generics.at(index)};
const Id pointer{ctx.OpAccessChain(type->pointer, generic_id, element_id())};
const Id value{ctx.OpLoad(type->id, pointer)};
return type->needs_cast ? ctx.OpBitcast(ctx.F32[1], value) : value;
}
switch (attr) {
case IR::Attribute::PositionX:
case IR::Attribute::PositionY:
case IR::Attribute::PositionZ:
case IR::Attribute::PositionW:
return ctx.OpLoad(ctx.F32[1],
ctx.OpAccessChain(ctx.input_f32, ctx.input_position, element_id()));
case IR::Attribute::InstanceId:
if (ctx.profile.support_vertex_instance_id) {
return ctx.OpLoad(ctx.U32[1], ctx.instance_id);
} else {
return ctx.OpISub(ctx.U32[1], ctx.OpLoad(ctx.U32[1], ctx.instance_index),
ctx.OpLoad(ctx.U32[1], ctx.base_instance));
}
case IR::Attribute::VertexId:
if (ctx.profile.support_vertex_instance_id) {
return ctx.OpLoad(ctx.U32[1], ctx.vertex_id);
} else {
return ctx.OpISub(ctx.U32[1], ctx.OpLoad(ctx.U32[1], ctx.vertex_index),
ctx.OpLoad(ctx.U32[1], ctx.base_vertex));
}
case IR::Attribute::FrontFace:
return ctx.OpSelect(ctx.U32[1], ctx.OpLoad(ctx.U1, ctx.front_face),
ctx.Constant(ctx.U32[1], std::numeric_limits<u32>::max()),
ctx.u32_zero_value);
default:
throw NotImplementedException("Read attribute {}", attr);
}
}
void EmitSetAttribute(EmitContext& ctx, IR::Attribute attr, Id value) {
ctx.OpStore(OutputAttrPointer(ctx, attr), value);
}
void EmitGetAttributeIndexed(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSetAttributeIndexed(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSetFragColor(EmitContext& ctx, u32 index, u32 component, Id value) {
const Id component_id{ctx.Constant(ctx.U32[1], component)};
const Id pointer{ctx.OpAccessChain(ctx.output_f32, ctx.frag_color.at(index), component_id)};
ctx.OpStore(pointer, value);
}
void EmitSetFragDepth(EmitContext& ctx, Id value) {
ctx.OpStore(ctx.frag_depth, value);
}
void EmitGetZFlag(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitGetSFlag(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitGetCFlag(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitGetOFlag(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSetZFlag(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSetSFlag(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSetCFlag(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSetOFlag(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
Id EmitWorkgroupId(EmitContext& ctx) {
return ctx.OpLoad(ctx.U32[3], ctx.workgroup_id);
}
Id EmitLocalInvocationId(EmitContext& ctx) {
return ctx.OpLoad(ctx.U32[3], ctx.local_invocation_id);
}
Id EmitLoadLocal(EmitContext& ctx, Id word_offset) {
const Id pointer{ctx.OpAccessChain(ctx.private_u32, ctx.local_memory, word_offset)};
return ctx.OpLoad(ctx.U32[1], pointer);
}
void EmitWriteLocal(EmitContext& ctx, Id word_offset, Id value) {
const Id pointer{ctx.OpAccessChain(ctx.private_u32, ctx.local_memory, word_offset)};
ctx.OpStore(pointer, value);
}
} // namespace Shader::Backend::SPIRV