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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 <climits>
#include <string_view>
#include <fmt/format.h>
#include "common/common_types.h"
#include "common/div_ceil.h"
#include "shader_recompiler/backend/spirv/emit_context.h"
namespace Shader::Backend::SPIRV {
namespace {
enum class Operation {
Increment,
Decrement,
FPAdd,
FPMin,
FPMax,
};
struct AttrInfo {
Id pointer;
Id id;
bool needs_cast;
};
Id ImageType(EmitContext& ctx, const TextureDescriptor& desc) {
const spv::ImageFormat format{spv::ImageFormat::Unknown};
const Id type{ctx.F32[1]};
const bool depth{desc.is_depth};
switch (desc.type) {
case TextureType::Color1D:
return ctx.TypeImage(type, spv::Dim::Dim1D, depth, false, false, 1, format);
case TextureType::ColorArray1D:
return ctx.TypeImage(type, spv::Dim::Dim1D, depth, true, false, 1, format);
case TextureType::Color2D:
return ctx.TypeImage(type, spv::Dim::Dim2D, depth, false, false, 1, format);
case TextureType::ColorArray2D:
return ctx.TypeImage(type, spv::Dim::Dim2D, depth, true, false, 1, format);
case TextureType::Color3D:
return ctx.TypeImage(type, spv::Dim::Dim3D, depth, false, false, 1, format);
case TextureType::ColorCube:
return ctx.TypeImage(type, spv::Dim::Cube, depth, false, false, 1, format);
case TextureType::ColorArrayCube:
return ctx.TypeImage(type, spv::Dim::Cube, depth, true, false, 1, format);
case TextureType::Buffer:
break;
}
throw InvalidArgument("Invalid texture type {}", desc.type);
}
spv::ImageFormat GetImageFormat(ImageFormat format) {
switch (format) {
case ImageFormat::Typeless:
return spv::ImageFormat::Unknown;
case ImageFormat::R8_UINT:
return spv::ImageFormat::R8ui;
case ImageFormat::R8_SINT:
return spv::ImageFormat::R8i;
case ImageFormat::R16_UINT:
return spv::ImageFormat::R16ui;
case ImageFormat::R16_SINT:
return spv::ImageFormat::R16i;
case ImageFormat::R32_UINT:
return spv::ImageFormat::R32ui;
case ImageFormat::R32G32_UINT:
return spv::ImageFormat::Rg32ui;
case ImageFormat::R32G32B32A32_UINT:
return spv::ImageFormat::Rgba32ui;
}
throw InvalidArgument("Invalid image format {}", format);
}
Id ImageType(EmitContext& ctx, const ImageDescriptor& desc) {
const spv::ImageFormat format{GetImageFormat(desc.format)};
const Id type{ctx.U32[1]};
switch (desc.type) {
case TextureType::Color1D:
return ctx.TypeImage(type, spv::Dim::Dim1D, false, false, false, 2, format);
case TextureType::ColorArray1D:
return ctx.TypeImage(type, spv::Dim::Dim1D, false, true, false, 2, format);
case TextureType::Color2D:
return ctx.TypeImage(type, spv::Dim::Dim2D, false, false, false, 2, format);
case TextureType::ColorArray2D:
return ctx.TypeImage(type, spv::Dim::Dim2D, false, true, false, 2, format);
case TextureType::Color3D:
return ctx.TypeImage(type, spv::Dim::Dim3D, false, false, false, 2, format);
case TextureType::Buffer:
throw NotImplementedException("Image buffer");
default:
break;
}
throw InvalidArgument("Invalid texture type {}", desc.type);
}
Id DefineVariable(EmitContext& ctx, Id type, std::optional<spv::BuiltIn> builtin,
spv::StorageClass storage_class) {
const Id pointer_type{ctx.TypePointer(storage_class, type)};
const Id id{ctx.AddGlobalVariable(pointer_type, storage_class)};
if (builtin) {
ctx.Decorate(id, spv::Decoration::BuiltIn, *builtin);
}
ctx.interfaces.push_back(id);
return id;
}
u32 NumVertices(InputTopology input_topology) {
switch (input_topology) {
case InputTopology::Points:
return 1;
case InputTopology::Lines:
return 2;
case InputTopology::LinesAdjacency:
return 4;
case InputTopology::Triangles:
return 3;
case InputTopology::TrianglesAdjacency:
return 6;
}
throw InvalidArgument("Invalid input topology {}", input_topology);
}
Id DefineInput(EmitContext& ctx, Id type, bool per_invocation,
std::optional<spv::BuiltIn> builtin = std::nullopt) {
switch (ctx.stage) {
case Stage::TessellationControl:
case Stage::TessellationEval:
if (per_invocation) {
type = ctx.TypeArray(type, ctx.Constant(ctx.U32[1], 32u));
}
break;
case Stage::Geometry:
if (per_invocation) {
const u32 num_vertices{NumVertices(ctx.profile.input_topology)};
type = ctx.TypeArray(type, ctx.Constant(ctx.U32[1], num_vertices));
}
break;
default:
break;
}
return DefineVariable(ctx, type, builtin, spv::StorageClass::Input);
}
Id DefineOutput(EmitContext& ctx, Id type, std::optional<u32> invocations,
std::optional<spv::BuiltIn> builtin = std::nullopt) {
if (invocations && ctx.stage == Stage::TessellationControl) {
type = ctx.TypeArray(type, ctx.Constant(ctx.U32[1], *invocations));
}
return DefineVariable(ctx, type, builtin, spv::StorageClass::Output);
}
void DefineGenericOutput(EmitContext& ctx, size_t index, std::optional<u32> invocations) {
static constexpr std::string_view swizzle{"xyzw"};
const size_t base_attr_index{static_cast<size_t>(IR::Attribute::Generic0X) + index * 4};
u32 element{0};
while (element < 4) {
const u32 remainder{4 - element};
const TransformFeedbackVarying* xfb_varying{};
if (!ctx.profile.xfb_varyings.empty()) {
xfb_varying = &ctx.profile.xfb_varyings[base_attr_index + element];
xfb_varying = xfb_varying && xfb_varying->components > 0 ? xfb_varying : nullptr;
}
const u32 num_components{xfb_varying ? xfb_varying->components : remainder};
const Id id{DefineOutput(ctx, ctx.F32[num_components], invocations)};
ctx.Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
if (element > 0) {
ctx.Decorate(id, spv::Decoration::Component, element);
}
if (xfb_varying) {
ctx.Decorate(id, spv::Decoration::XfbBuffer, xfb_varying->buffer);
ctx.Decorate(id, spv::Decoration::XfbStride, xfb_varying->stride);
ctx.Decorate(id, spv::Decoration::Offset, xfb_varying->offset);
}
if (num_components < 4 || element > 0) {
const std::string_view subswizzle{swizzle.substr(element, num_components)};
ctx.Name(id, fmt::format("out_attr{}_{}", index, subswizzle));
} else {
ctx.Name(id, fmt::format("out_attr{}", index));
}
const GenericElementInfo info{
.id = id,
.first_element = element,
.num_components = num_components,
};
std::fill_n(ctx.output_generics[index].begin(), num_components, info);
element += num_components;
}
}
Id GetAttributeType(EmitContext& ctx, AttributeType type) {
switch (type) {
case AttributeType::Float:
return ctx.F32[4];
case AttributeType::SignedInt:
return ctx.TypeVector(ctx.TypeInt(32, true), 4);
case AttributeType::UnsignedInt:
return ctx.U32[4];
case AttributeType::Disabled:
break;
}
throw InvalidArgument("Invalid attribute type {}", type);
}
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);
}
void DefineConstBuffers(EmitContext& ctx, const Info& info, Id UniformDefinitions::*member_type,
u32 binding, Id type, char type_char, u32 element_size) {
const Id array_type{ctx.TypeArray(type, ctx.Constant(ctx.U32[1], 65536U / element_size))};
ctx.Decorate(array_type, spv::Decoration::ArrayStride, element_size);
const Id struct_type{ctx.TypeStruct(array_type)};
ctx.Name(struct_type, fmt::format("cbuf_block_{}{}", type_char, element_size * CHAR_BIT));
ctx.Decorate(struct_type, spv::Decoration::Block);
ctx.MemberName(struct_type, 0, "data");
ctx.MemberDecorate(struct_type, 0, spv::Decoration::Offset, 0U);
const Id struct_pointer_type{ctx.TypePointer(spv::StorageClass::Uniform, struct_type)};
const Id uniform_type{ctx.TypePointer(spv::StorageClass::Uniform, type)};
ctx.uniform_types.*member_type = uniform_type;
for (const ConstantBufferDescriptor& desc : info.constant_buffer_descriptors) {
const Id id{ctx.AddGlobalVariable(struct_pointer_type, spv::StorageClass::Uniform)};
ctx.Decorate(id, spv::Decoration::Binding, binding);
ctx.Decorate(id, spv::Decoration::DescriptorSet, 0U);
ctx.Name(id, fmt::format("c{}", desc.index));
for (size_t i = 0; i < desc.count; ++i) {
ctx.cbufs[desc.index + i].*member_type = id;
}
if (ctx.profile.supported_spirv >= 0x00010400) {
ctx.interfaces.push_back(id);
}
binding += desc.count;
}
}
void DefineSsbos(EmitContext& ctx, StorageTypeDefinition& type_def,
Id StorageDefinitions::*member_type, const Info& info, u32 binding, Id type,
u32 stride) {
const Id array_type{ctx.TypeRuntimeArray(type)};
ctx.Decorate(array_type, spv::Decoration::ArrayStride, stride);
const Id struct_type{ctx.TypeStruct(array_type)};
ctx.Decorate(struct_type, spv::Decoration::Block);
ctx.MemberDecorate(struct_type, 0, spv::Decoration::Offset, 0U);
const Id struct_pointer{ctx.TypePointer(spv::StorageClass::StorageBuffer, struct_type)};
type_def.array = struct_pointer;
type_def.element = ctx.TypePointer(spv::StorageClass::StorageBuffer, type);
u32 index{};
for (const StorageBufferDescriptor& desc : info.storage_buffers_descriptors) {
const Id id{ctx.AddGlobalVariable(struct_pointer, spv::StorageClass::StorageBuffer)};
ctx.Decorate(id, spv::Decoration::Binding, binding);
ctx.Decorate(id, spv::Decoration::DescriptorSet, 0U);
ctx.Name(id, fmt::format("ssbo{}", index));
if (ctx.profile.supported_spirv >= 0x00010400) {
ctx.interfaces.push_back(id);
}
for (size_t i = 0; i < desc.count; ++i) {
ctx.ssbos[index + i].*member_type = id;
}
index += desc.count;
binding += desc.count;
}
}
Id CasFunction(EmitContext& ctx, Operation operation, Id value_type) {
const Id func_type{ctx.TypeFunction(value_type, value_type, value_type)};
const Id func{ctx.OpFunction(value_type, spv::FunctionControlMask::MaskNone, func_type)};
const Id op_a{ctx.OpFunctionParameter(value_type)};
const Id op_b{ctx.OpFunctionParameter(value_type)};
ctx.AddLabel();
Id result{};
switch (operation) {
case Operation::Increment: {
const Id pred{ctx.OpUGreaterThanEqual(ctx.U1, op_a, op_b)};
const Id incr{ctx.OpIAdd(value_type, op_a, ctx.Constant(value_type, 1))};
result = ctx.OpSelect(value_type, pred, ctx.u32_zero_value, incr);
break;
}
case Operation::Decrement: {
const Id lhs{ctx.OpIEqual(ctx.U1, op_a, ctx.Constant(value_type, 0u))};
const Id rhs{ctx.OpUGreaterThan(ctx.U1, op_a, op_b)};
const Id pred{ctx.OpLogicalOr(ctx.U1, lhs, rhs)};
const Id decr{ctx.OpISub(value_type, op_a, ctx.Constant(value_type, 1))};
result = ctx.OpSelect(value_type, pred, op_b, decr);
break;
}
case Operation::FPAdd:
result = ctx.OpFAdd(value_type, op_a, op_b);
break;
case Operation::FPMin:
result = ctx.OpFMin(value_type, op_a, op_b);
break;
case Operation::FPMax:
result = ctx.OpFMax(value_type, op_a, op_b);
break;
default:
break;
}
ctx.OpReturnValue(result);
ctx.OpFunctionEnd();
return func;
}
Id CasLoop(EmitContext& ctx, Operation operation, Id array_pointer, Id element_pointer,
Id value_type, Id memory_type, spv::Scope scope) {
const bool is_shared{scope == spv::Scope::Workgroup};
const bool is_struct{!is_shared || ctx.profile.support_explicit_workgroup_layout};
const Id cas_func{CasFunction(ctx, operation, value_type)};
const Id zero{ctx.u32_zero_value};
const Id scope_id{ctx.Constant(ctx.U32[1], static_cast<u32>(scope))};
const Id loop_header{ctx.OpLabel()};
const Id continue_block{ctx.OpLabel()};
const Id merge_block{ctx.OpLabel()};
const Id func_type{is_shared
? ctx.TypeFunction(value_type, ctx.U32[1], value_type)
: ctx.TypeFunction(value_type, ctx.U32[1], value_type, array_pointer)};
const Id func{ctx.OpFunction(value_type, spv::FunctionControlMask::MaskNone, func_type)};
const Id index{ctx.OpFunctionParameter(ctx.U32[1])};
const Id op_b{ctx.OpFunctionParameter(value_type)};
const Id base{is_shared ? ctx.shared_memory_u32 : ctx.OpFunctionParameter(array_pointer)};
ctx.AddLabel();
ctx.OpBranch(loop_header);
ctx.AddLabel(loop_header);
ctx.OpLoopMerge(merge_block, continue_block, spv::LoopControlMask::MaskNone);
ctx.OpBranch(continue_block);
ctx.AddLabel(continue_block);
const Id word_pointer{is_struct ? ctx.OpAccessChain(element_pointer, base, zero, index)
: ctx.OpAccessChain(element_pointer, base, index)};
if (value_type.value == ctx.F32[2].value) {
const Id u32_value{ctx.OpLoad(ctx.U32[1], word_pointer)};
const Id value{ctx.OpUnpackHalf2x16(ctx.F32[2], u32_value)};
const Id new_value{ctx.OpFunctionCall(value_type, cas_func, value, op_b)};
const Id u32_new_value{ctx.OpPackHalf2x16(ctx.U32[1], new_value)};
const Id atomic_res{ctx.OpAtomicCompareExchange(ctx.U32[1], word_pointer, scope_id, zero,
zero, u32_new_value, u32_value)};
const Id success{ctx.OpIEqual(ctx.U1, atomic_res, u32_value)};
ctx.OpBranchConditional(success, merge_block, loop_header);
ctx.AddLabel(merge_block);
ctx.OpReturnValue(ctx.OpUnpackHalf2x16(ctx.F32[2], atomic_res));
} else {
const Id value{ctx.OpLoad(memory_type, word_pointer)};
const bool matching_type{value_type.value == memory_type.value};
const Id bitcast_value{matching_type ? value : ctx.OpBitcast(value_type, value)};
const Id cal_res{ctx.OpFunctionCall(value_type, cas_func, bitcast_value, op_b)};
const Id new_value{matching_type ? cal_res : ctx.OpBitcast(memory_type, cal_res)};
const Id atomic_res{ctx.OpAtomicCompareExchange(ctx.U32[1], word_pointer, scope_id, zero,
zero, new_value, value)};
const Id success{ctx.OpIEqual(ctx.U1, atomic_res, value)};
ctx.OpBranchConditional(success, merge_block, loop_header);
ctx.AddLabel(merge_block);
ctx.OpReturnValue(ctx.OpBitcast(value_type, atomic_res));
}
ctx.OpFunctionEnd();
return func;
}
} // Anonymous namespace
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[static_cast<size_t>(i)] =
sirit_ctx.Name(sirit_ctx.TypeVector(base_type, i + 1), def_name_view);
}
}
EmitContext::EmitContext(const Profile& profile_, IR::Program& program, u32& binding)
: Sirit::Module(profile_.supported_spirv), profile{profile_}, stage{program.stage} {
AddCapability(spv::Capability::Shader);
DefineCommonTypes(program.info);
DefineCommonConstants();
DefineInterfaces(program);
DefineLocalMemory(program);
DefineSharedMemory(program);
DefineSharedMemoryFunctions(program);
DefineConstantBuffers(program.info, binding);
DefineStorageBuffers(program.info, binding);
DefineTextureBuffers(program.info, binding);
DefineImageBuffers(program.info, binding);
DefineTextures(program.info, binding);
DefineImages(program.info, binding);
DefineAttributeMemAccess(program.info);
DefineLabels(program);
}
EmitContext::~EmitContext() = default;
Id EmitContext::Def(const IR::Value& value) {
if (!value.IsImmediate()) {
return value.InstRecursive()->Definition<Id>();
}
switch (value.Type()) {
case IR::Type::Void:
// Void instructions are used for optional arguments (e.g. texture offsets)
// They are not meant to be used in the SPIR-V module
return Id{};
case IR::Type::U1:
return value.U1() ? true_value : false_value;
case IR::Type::U32:
return Constant(U32[1], value.U32());
case IR::Type::U64:
return Constant(U64, value.U64());
case IR::Type::F32:
return Constant(F32[1], value.F32());
case IR::Type::F64:
return Constant(F64[1], value.F64());
case IR::Type::Label:
return value.Label()->Definition<Id>();
default:
throw NotImplementedException("Immediate type {}", value.Type());
}
}
void EmitContext::DefineCommonTypes(const Info& info) {
void_id = TypeVoid();
U1 = Name(TypeBool(), "u1");
F32.Define(*this, TypeFloat(32), "f32");
U32.Define(*this, TypeInt(32, false), "u32");
private_u32 = Name(TypePointer(spv::StorageClass::Private, U32[1]), "private_u32");
input_f32 = Name(TypePointer(spv::StorageClass::Input, F32[1]), "input_f32");
input_u32 = Name(TypePointer(spv::StorageClass::Input, U32[1]), "input_u32");
input_s32 = Name(TypePointer(spv::StorageClass::Input, TypeInt(32, true)), "input_s32");
output_f32 = Name(TypePointer(spv::StorageClass::Output, F32[1]), "output_f32");
output_u32 = Name(TypePointer(spv::StorageClass::Output, U32[1]), "output_u32");
if (info.uses_int8) {
AddCapability(spv::Capability::Int8);
U8 = Name(TypeInt(8, false), "u8");
S8 = Name(TypeInt(8, true), "s8");
}
if (info.uses_int16) {
AddCapability(spv::Capability::Int16);
U16 = Name(TypeInt(16, false), "u16");
S16 = Name(TypeInt(16, true), "s16");
}
if (info.uses_int64) {
AddCapability(spv::Capability::Int64);
U64 = Name(TypeInt(64, false), "u64");
}
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);
f32_zero_value = Constant(F32[1], 0.0f);
}
void EmitContext::DefineInterfaces(const IR::Program& program) {
DefineInputs(program.info);
DefineOutputs(program);
}
void EmitContext::DefineLocalMemory(const IR::Program& program) {
if (program.local_memory_size == 0) {
return;
}
const u32 num_elements{Common::DivCeil(program.local_memory_size, 4U)};
const Id type{TypeArray(U32[1], Constant(U32[1], num_elements))};
const Id pointer{TypePointer(spv::StorageClass::Private, type)};
local_memory = AddGlobalVariable(pointer, spv::StorageClass::Private);
if (profile.supported_spirv >= 0x00010400) {
interfaces.push_back(local_memory);
}
}
void EmitContext::DefineSharedMemory(const IR::Program& program) {
if (program.shared_memory_size == 0) {
return;
}
const auto make{[&](Id element_type, u32 element_size) {
const u32 num_elements{Common::DivCeil(program.shared_memory_size, element_size)};
const Id array_type{TypeArray(element_type, Constant(U32[1], num_elements))};
Decorate(array_type, spv::Decoration::ArrayStride, element_size);
const Id struct_type{TypeStruct(array_type)};
MemberDecorate(struct_type, 0U, spv::Decoration::Offset, 0U);
Decorate(struct_type, spv::Decoration::Block);
const Id pointer{TypePointer(spv::StorageClass::Workgroup, struct_type)};
const Id element_pointer{TypePointer(spv::StorageClass::Workgroup, element_type)};
const Id variable{AddGlobalVariable(pointer, spv::StorageClass::Workgroup)};
Decorate(variable, spv::Decoration::Aliased);
interfaces.push_back(variable);
return std::make_tuple(variable, element_pointer, pointer);
}};
if (profile.support_explicit_workgroup_layout) {
AddExtension("SPV_KHR_workgroup_memory_explicit_layout");
AddCapability(spv::Capability::WorkgroupMemoryExplicitLayoutKHR);
if (program.info.uses_int8) {
AddCapability(spv::Capability::WorkgroupMemoryExplicitLayout8BitAccessKHR);
std::tie(shared_memory_u8, shared_u8, std::ignore) = make(U8, 1);
}
if (program.info.uses_int16) {
AddCapability(spv::Capability::WorkgroupMemoryExplicitLayout16BitAccessKHR);
std::tie(shared_memory_u16, shared_u16, std::ignore) = make(U16, 2);
}
if (program.info.uses_int64) {
std::tie(shared_memory_u64, shared_u64, std::ignore) = make(U64, 8);
}
std::tie(shared_memory_u32, shared_u32, shared_memory_u32_type) = make(U32[1], 4);
std::tie(shared_memory_u32x2, shared_u32x2, std::ignore) = make(U32[2], 8);
std::tie(shared_memory_u32x4, shared_u32x4, std::ignore) = make(U32[4], 16);
return;
}
const u32 num_elements{Common::DivCeil(program.shared_memory_size, 4U)};
const Id type{TypeArray(U32[1], Constant(U32[1], num_elements))};
shared_memory_u32_type = TypePointer(spv::StorageClass::Workgroup, type);
shared_u32 = TypePointer(spv::StorageClass::Workgroup, U32[1]);
shared_memory_u32 = AddGlobalVariable(shared_memory_u32_type, spv::StorageClass::Workgroup);
interfaces.push_back(shared_memory_u32);
const Id func_type{TypeFunction(void_id, U32[1], U32[1])};
const auto make_function{[&](u32 mask, u32 size) {
const Id loop_header{OpLabel()};
const Id continue_block{OpLabel()};
const Id merge_block{OpLabel()};
const Id func{OpFunction(void_id, spv::FunctionControlMask::MaskNone, func_type)};
const Id offset{OpFunctionParameter(U32[1])};
const Id insert_value{OpFunctionParameter(U32[1])};
AddLabel();
OpBranch(loop_header);
AddLabel(loop_header);
const Id word_offset{OpShiftRightArithmetic(U32[1], offset, Constant(U32[1], 2U))};
const Id shift_offset{OpShiftLeftLogical(U32[1], offset, Constant(U32[1], 3U))};
const Id bit_offset{OpBitwiseAnd(U32[1], shift_offset, Constant(U32[1], mask))};
const Id count{Constant(U32[1], size)};
OpLoopMerge(merge_block, continue_block, spv::LoopControlMask::MaskNone);
OpBranch(continue_block);
AddLabel(continue_block);
const Id word_pointer{OpAccessChain(shared_u32, shared_memory_u32, word_offset)};
const Id old_value{OpLoad(U32[1], word_pointer)};
const Id new_value{OpBitFieldInsert(U32[1], old_value, insert_value, bit_offset, count)};
const Id atomic_res{OpAtomicCompareExchange(U32[1], word_pointer, Constant(U32[1], 1U),
u32_zero_value, u32_zero_value, new_value,
old_value)};
const Id success{OpIEqual(U1, atomic_res, old_value)};
OpBranchConditional(success, merge_block, loop_header);
AddLabel(merge_block);
OpReturn();
OpFunctionEnd();
return func;
}};
if (program.info.uses_int8) {
shared_store_u8_func = make_function(24, 8);
}
if (program.info.uses_int16) {
shared_store_u16_func = make_function(16, 16);
}
}
void EmitContext::DefineSharedMemoryFunctions(const IR::Program& program) {
if (program.info.uses_shared_increment) {
increment_cas_shared = CasLoop(*this, Operation::Increment, shared_memory_u32_type,
shared_u32, U32[1], U32[1], spv::Scope::Workgroup);
}
if (program.info.uses_shared_decrement) {
decrement_cas_shared = CasLoop(*this, Operation::Decrement, shared_memory_u32_type,
shared_u32, U32[1], U32[1], spv::Scope::Workgroup);
}
}
void EmitContext::DefineAttributeMemAccess(const Info& info) {
const auto make_load{[&] {
const bool is_array{stage == Stage::Geometry};
const Id end_block{OpLabel()};
const Id default_label{OpLabel()};
const Id func_type_load{is_array ? TypeFunction(F32[1], U32[1], U32[1])
: TypeFunction(F32[1], U32[1])};
const Id func{OpFunction(F32[1], spv::FunctionControlMask::MaskNone, func_type_load)};
const Id offset{OpFunctionParameter(U32[1])};
const Id vertex{is_array ? OpFunctionParameter(U32[1]) : Id{}};
AddLabel();
const Id base_index{OpShiftRightArithmetic(U32[1], offset, Constant(U32[1], 2U))};
const Id masked_index{OpBitwiseAnd(U32[1], base_index, Constant(U32[1], 3U))};
const Id compare_index{OpShiftRightArithmetic(U32[1], base_index, Constant(U32[1], 2U))};
std::vector<Sirit::Literal> literals;
std::vector<Id> labels;
if (info.loads_position) {
literals.push_back(static_cast<u32>(IR::Attribute::PositionX) >> 2);
labels.push_back(OpLabel());
}
const u32 base_attribute_value = static_cast<u32>(IR::Attribute::Generic0X) >> 2;
for (u32 i = 0; i < info.input_generics.size(); ++i) {
if (!info.input_generics[i].used) {
continue;
}
literals.push_back(base_attribute_value + i);
labels.push_back(OpLabel());
}
OpSelectionMerge(end_block, spv::SelectionControlMask::MaskNone);
OpSwitch(compare_index, default_label, literals, labels);
AddLabel(default_label);
OpReturnValue(Constant(F32[1], 0.0f));
size_t label_index{0};
if (info.loads_position) {
AddLabel(labels[label_index]);
const Id pointer{is_array
? OpAccessChain(input_f32, input_position, vertex, masked_index)
: OpAccessChain(input_f32, input_position, masked_index)};
const Id result{OpLoad(F32[1], pointer)};
OpReturnValue(result);
++label_index;
}
for (size_t i = 0; i < info.input_generics.size(); i++) {
if (!info.input_generics[i].used) {
continue;
}
AddLabel(labels[label_index]);
const auto type{AttrTypes(*this, static_cast<u32>(i))};
if (!type) {
OpReturnValue(Constant(F32[1], 0.0f));
++label_index;
continue;
}
const Id generic_id{input_generics.at(i)};
const Id pointer{is_array
? OpAccessChain(type->pointer, generic_id, vertex, masked_index)
: OpAccessChain(type->pointer, generic_id, masked_index)};
const Id value{OpLoad(type->id, pointer)};
const Id result{type->needs_cast ? OpBitcast(F32[1], value) : value};
OpReturnValue(result);
++label_index;
}
AddLabel(end_block);
OpUnreachable();
OpFunctionEnd();
return func;
}};
const auto make_store{[&] {
const Id end_block{OpLabel()};
const Id default_label{OpLabel()};
const Id func_type_store{TypeFunction(void_id, U32[1], F32[1])};
const Id func{OpFunction(void_id, spv::FunctionControlMask::MaskNone, func_type_store)};
const Id offset{OpFunctionParameter(U32[1])};
const Id store_value{OpFunctionParameter(F32[1])};
AddLabel();
const Id base_index{OpShiftRightArithmetic(U32[1], offset, Constant(U32[1], 2U))};
const Id masked_index{OpBitwiseAnd(U32[1], base_index, Constant(U32[1], 3U))};
const Id compare_index{OpShiftRightArithmetic(U32[1], base_index, Constant(U32[1], 2U))};
std::vector<Sirit::Literal> literals;
std::vector<Id> labels;
if (info.stores_position) {
literals.push_back(static_cast<u32>(IR::Attribute::PositionX) >> 2);
labels.push_back(OpLabel());
}
const u32 base_attribute_value = static_cast<u32>(IR::Attribute::Generic0X) >> 2;
for (size_t i = 0; i < info.stores_generics.size(); i++) {
if (!info.stores_generics[i]) {
continue;
}
literals.push_back(base_attribute_value + static_cast<u32>(i));
labels.push_back(OpLabel());
}
if (info.stores_clip_distance) {
literals.push_back(static_cast<u32>(IR::Attribute::ClipDistance0) >> 2);
labels.push_back(OpLabel());
literals.push_back(static_cast<u32>(IR::Attribute::ClipDistance4) >> 2);
labels.push_back(OpLabel());
}
OpSelectionMerge(end_block, spv::SelectionControlMask::MaskNone);
OpSwitch(compare_index, default_label, literals, labels);
AddLabel(default_label);
OpReturn();
size_t label_index{0};
if (info.stores_position) {
AddLabel(labels[label_index]);
const Id pointer{OpAccessChain(output_f32, output_position, masked_index)};
OpStore(pointer, store_value);
OpReturn();
++label_index;
}
for (size_t i = 0; i < info.stores_generics.size(); ++i) {
if (!info.stores_generics[i]) {
continue;
}
if (output_generics[i][0].num_components != 4) {
throw NotImplementedException("Physical stores and transform feedbacks");
}
AddLabel(labels[label_index]);
const Id generic_id{output_generics[i][0].id};
const Id pointer{OpAccessChain(output_f32, generic_id, masked_index)};
OpStore(pointer, store_value);
OpReturn();
++label_index;
}
if (info.stores_clip_distance) {
AddLabel(labels[label_index]);
const Id pointer{OpAccessChain(output_f32, clip_distances, masked_index)};
OpStore(pointer, store_value);
OpReturn();
++label_index;
AddLabel(labels[label_index]);
const Id fixed_index{OpIAdd(U32[1], masked_index, Constant(U32[1], 4))};
const Id pointer2{OpAccessChain(output_f32, clip_distances, fixed_index)};
OpStore(pointer2, store_value);
OpReturn();
++label_index;
}
AddLabel(end_block);
OpUnreachable();
OpFunctionEnd();
return func;
}};
if (info.loads_indexed_attributes) {
indexed_load_func = make_load();
}
if (info.stores_indexed_attributes) {
indexed_store_func = make_store();
}
}
void EmitContext::DefineConstantBuffers(const Info& info, u32& binding) {
if (info.constant_buffer_descriptors.empty()) {
return;
}
if (True(info.used_constant_buffer_types & IR::Type::U8)) {
DefineConstBuffers(*this, info, &UniformDefinitions::U8, binding, U8, 'u', sizeof(u8));
DefineConstBuffers(*this, info, &UniformDefinitions::S8, binding, S8, 's', sizeof(s8));
}
if (True(info.used_constant_buffer_types & IR::Type::U16)) {
DefineConstBuffers(*this, info, &UniformDefinitions::U16, binding, U16, 'u', sizeof(u16));
DefineConstBuffers(*this, info, &UniformDefinitions::S16, binding, S16, 's', sizeof(s16));
}
if (True(info.used_constant_buffer_types & IR::Type::U32)) {
DefineConstBuffers(*this, info, &UniformDefinitions::U32, binding, U32[1], 'u',
sizeof(u32));
}
if (True(info.used_constant_buffer_types & IR::Type::F32)) {
DefineConstBuffers(*this, info, &UniformDefinitions::F32, binding, F32[1], 'f',
sizeof(f32));
}
if (True(info.used_constant_buffer_types & IR::Type::U32x2)) {
DefineConstBuffers(*this, info, &UniformDefinitions::U32x2, binding, U32[2], 'u',
sizeof(u32[2]));
}
for (const ConstantBufferDescriptor& desc : info.constant_buffer_descriptors) {
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");
if (True(info.used_storage_buffer_types & IR::Type::U8)) {
DefineSsbos(*this, storage_types.U8, &StorageDefinitions::U8, info, binding, U8,
sizeof(u8));
DefineSsbos(*this, storage_types.S8, &StorageDefinitions::S8, info, binding, S8,
sizeof(u8));
}
if (True(info.used_storage_buffer_types & IR::Type::U16)) {
DefineSsbos(*this, storage_types.U16, &StorageDefinitions::U16, info, binding, U16,
sizeof(u16));
DefineSsbos(*this, storage_types.S16, &StorageDefinitions::S16, info, binding, S16,
sizeof(u16));
}
if (True(info.used_storage_buffer_types & IR::Type::U32)) {
DefineSsbos(*this, storage_types.U32, &StorageDefinitions::U32, info, binding, U32[1],
sizeof(u32));
}
if (True(info.used_storage_buffer_types & IR::Type::F32)) {
DefineSsbos(*this, storage_types.F32, &StorageDefinitions::F32, info, binding, F32[1],
sizeof(f32));
}
if (True(info.used_storage_buffer_types & IR::Type::U64)) {
DefineSsbos(*this, storage_types.U64, &StorageDefinitions::U64, info, binding, U64,
sizeof(u64));
}
if (True(info.used_storage_buffer_types & IR::Type::U32x2)) {
DefineSsbos(*this, storage_types.U32x2, &StorageDefinitions::U32x2, info, binding, U32[2],
sizeof(u32[2]));
}
if (True(info.used_storage_buffer_types & IR::Type::U32x4)) {
DefineSsbos(*this, storage_types.U32x4, &StorageDefinitions::U32x4, info, binding, U32[4],
sizeof(u32[4]));
}
for (const StorageBufferDescriptor& desc : info.storage_buffers_descriptors) {
binding += desc.count;
}
const bool needs_function{
info.uses_global_increment || info.uses_global_decrement || info.uses_atomic_f32_add ||
info.uses_atomic_f16x2_add || info.uses_atomic_f16x2_min || info.uses_atomic_f16x2_max ||
info.uses_atomic_f32x2_add || info.uses_atomic_f32x2_min || info.uses_atomic_f32x2_max};
if (needs_function) {
AddCapability(spv::Capability::VariablePointersStorageBuffer);
}
if (info.uses_global_increment) {
increment_cas_ssbo = CasLoop(*this, Operation::Increment, storage_types.U32.array,
storage_types.U32.element, U32[1], U32[1], spv::Scope::Device);
}
if (info.uses_global_decrement) {
decrement_cas_ssbo = CasLoop(*this, Operation::Decrement, storage_types.U32.array,
storage_types.U32.element, U32[1], U32[1], spv::Scope::Device);
}
if (info.uses_atomic_f32_add) {
f32_add_cas = CasLoop(*this, Operation::FPAdd, storage_types.U32.array,
storage_types.U32.element, F32[1], U32[1], spv::Scope::Device);
}
if (info.uses_atomic_f16x2_add) {
f16x2_add_cas = CasLoop(*this, Operation::FPAdd, storage_types.U32.array,
storage_types.U32.element, F16[2], F16[2], spv::Scope::Device);
}
if (info.uses_atomic_f16x2_min) {
f16x2_min_cas = CasLoop(*this, Operation::FPMin, storage_types.U32.array,
storage_types.U32.element, F16[2], F16[2], spv::Scope::Device);
}
if (info.uses_atomic_f16x2_max) {
f16x2_max_cas = CasLoop(*this, Operation::FPMax, storage_types.U32.array,
storage_types.U32.element, F16[2], F16[2], spv::Scope::Device);
}
if (info.uses_atomic_f32x2_add) {
f32x2_add_cas = CasLoop(*this, Operation::FPAdd, storage_types.U32.array,
storage_types.U32.element, F32[2], F32[2], spv::Scope::Device);
}
if (info.uses_atomic_f32x2_min) {
f32x2_min_cas = CasLoop(*this, Operation::FPMin, storage_types.U32.array,
storage_types.U32.element, F32[2], F32[2], spv::Scope::Device);
}
if (info.uses_atomic_f32x2_max) {
f32x2_max_cas = CasLoop(*this, Operation::FPMax, storage_types.U32.array,
storage_types.U32.element, F32[2], F32[2], spv::Scope::Device);
}
}
void EmitContext::DefineTextureBuffers(const Info& info, u32& binding) {
if (info.texture_buffer_descriptors.empty()) {
return;
}
const spv::ImageFormat format{spv::ImageFormat::Unknown};
image_buffer_type = TypeImage(F32[1], spv::Dim::Buffer, 0U, false, false, 1, format);
sampled_texture_buffer_type = TypeSampledImage(image_buffer_type);
const Id type{TypePointer(spv::StorageClass::UniformConstant, sampled_texture_buffer_type)};
texture_buffers.reserve(info.texture_buffer_descriptors.size());
for (const TextureBufferDescriptor& desc : info.texture_buffer_descriptors) {
if (desc.count != 1) {
throw NotImplementedException("Array of texture buffers");
}
const Id id{AddGlobalVariable(type, spv::StorageClass::UniformConstant)};
Decorate(id, spv::Decoration::Binding, binding);
Decorate(id, spv::Decoration::DescriptorSet, 0U);
Name(id, fmt::format("texbuf{}_{:02x}", desc.cbuf_index, desc.cbuf_offset));
texture_buffers.insert(texture_buffers.end(), desc.count, id);
if (profile.supported_spirv >= 0x00010400) {
interfaces.push_back(id);
}
binding += desc.count;
}
}
void EmitContext::DefineImageBuffers(const Info& info, u32& binding) {
image_buffers.reserve(info.image_buffer_descriptors.size());
for (const ImageBufferDescriptor& desc : info.image_buffer_descriptors) {
if (desc.count != 1) {
throw NotImplementedException("Array of image buffers");
}
const spv::ImageFormat format{GetImageFormat(desc.format)};
const Id image_type{TypeImage(U32[4], spv::Dim::Buffer, false, false, false, 2, format)};
const Id pointer_type{TypePointer(spv::StorageClass::UniformConstant, image_type)};
const Id id{AddGlobalVariable(pointer_type, spv::StorageClass::UniformConstant)};
Decorate(id, spv::Decoration::Binding, binding);
Decorate(id, spv::Decoration::DescriptorSet, 0U);
Name(id, fmt::format("imgbuf{}_{:02x}", desc.cbuf_index, desc.cbuf_offset));
const ImageBufferDefinition def{
.id = id,
.image_type = image_type,
};
image_buffers.insert(image_buffers.end(), desc.count, def);
if (profile.supported_spirv >= 0x00010400) {
interfaces.push_back(id);
}
binding += desc.count;
}
}
void EmitContext::DefineTextures(const Info& info, u32& binding) {
textures.reserve(info.texture_descriptors.size());
for (const TextureDescriptor& desc : info.texture_descriptors) {
if (desc.count != 1) {
throw NotImplementedException("Array of textures");
}
const Id image_type{ImageType(*this, desc)};
const Id sampled_type{TypeSampledImage(image_type)};
const Id pointer_type{TypePointer(spv::StorageClass::UniformConstant, sampled_type)};
const Id id{AddGlobalVariable(pointer_type, spv::StorageClass::UniformConstant)};
Decorate(id, spv::Decoration::Binding, binding);
Decorate(id, spv::Decoration::DescriptorSet, 0U);
Name(id, fmt::format("tex{}_{:02x}", desc.cbuf_index, desc.cbuf_offset));
for (u32 index = 0; index < desc.count; ++index) {
// TODO: Pass count info
textures.push_back(TextureDefinition{
.id{id},
.sampled_type{sampled_type},
.image_type{image_type},
});
}
if (profile.supported_spirv >= 0x00010400) {
interfaces.push_back(id);
}
binding += desc.count;
}
}
void EmitContext::DefineImages(const Info& info, u32& binding) {
images.reserve(info.image_descriptors.size());
for (const ImageDescriptor& desc : info.image_descriptors) {
if (desc.count != 1) {
throw NotImplementedException("Array of textures");
}
const Id image_type{ImageType(*this, desc)};
const Id pointer_type{TypePointer(spv::StorageClass::UniformConstant, image_type)};
const Id id{AddGlobalVariable(pointer_type, spv::StorageClass::UniformConstant)};
Decorate(id, spv::Decoration::Binding, binding);
Decorate(id, spv::Decoration::DescriptorSet, 0U);
Name(id, fmt::format("img{}_{:02x}", desc.cbuf_index, desc.cbuf_offset));
for (u32 index = 0; index < desc.count; ++index) {
images.push_back(ImageDefinition{
.id{id},
.image_type{image_type},
});
}
if (profile.supported_spirv >= 0x00010400) {
interfaces.push_back(id);
}
binding += desc.count;
}
}
void EmitContext::DefineLabels(IR::Program& program) {
for (IR::Block* const block : program.blocks) {
block->SetDefinition(OpLabel());
}
}
void EmitContext::DefineInputs(const Info& info) {
if (info.uses_workgroup_id) {
workgroup_id = DefineInput(*this, U32[3], false, spv::BuiltIn::WorkgroupId);
}
if (info.uses_local_invocation_id) {
local_invocation_id = DefineInput(*this, U32[3], false, spv::BuiltIn::LocalInvocationId);
}
if (info.uses_invocation_id) {
invocation_id = DefineInput(*this, U32[1], false, spv::BuiltIn::InvocationId);
}
if (info.uses_sample_id) {
sample_id = DefineInput(*this, U32[1], false, spv::BuiltIn::SampleId);
}
if (info.uses_is_helper_invocation) {
is_helper_invocation = DefineInput(*this, U1, false, spv::BuiltIn::HelperInvocation);
}
if (info.uses_subgroup_mask) {
subgroup_mask_eq = DefineInput(*this, U32[4], false, spv::BuiltIn::SubgroupEqMaskKHR);
subgroup_mask_lt = DefineInput(*this, U32[4], false, spv::BuiltIn::SubgroupLtMaskKHR);
subgroup_mask_le = DefineInput(*this, U32[4], false, spv::BuiltIn::SubgroupLeMaskKHR);
subgroup_mask_gt = DefineInput(*this, U32[4], false, spv::BuiltIn::SubgroupGtMaskKHR);
subgroup_mask_ge = DefineInput(*this, U32[4], false, spv::BuiltIn::SubgroupGeMaskKHR);
}
if (info.uses_subgroup_invocation_id ||
(profile.warp_size_potentially_larger_than_guest &&
(info.uses_subgroup_vote || info.uses_subgroup_mask))) {
subgroup_local_invocation_id =
DefineInput(*this, U32[1], false, spv::BuiltIn::SubgroupLocalInvocationId);
}
if (info.uses_fswzadd) {
const Id f32_one{Constant(F32[1], 1.0f)};
const Id f32_minus_one{Constant(F32[1], -1.0f)};
const Id f32_zero{Constant(F32[1], 0.0f)};
fswzadd_lut_a = ConstantComposite(F32[4], f32_minus_one, f32_one, f32_minus_one, f32_zero);
fswzadd_lut_b =
ConstantComposite(F32[4], f32_minus_one, f32_minus_one, f32_one, f32_minus_one);
}
if (info.loads_primitive_id) {
primitive_id = DefineInput(*this, U32[1], false, spv::BuiltIn::PrimitiveId);
}
if (info.loads_position) {
const bool is_fragment{stage != Stage::Fragment};
const spv::BuiltIn built_in{is_fragment ? spv::BuiltIn::Position : spv::BuiltIn::FragCoord};
input_position = DefineInput(*this, F32[4], true, built_in);
}
if (info.loads_instance_id) {
if (profile.support_vertex_instance_id) {
instance_id = DefineInput(*this, U32[1], true, spv::BuiltIn::InstanceId);
} else {
instance_index = DefineInput(*this, U32[1], true, spv::BuiltIn::InstanceIndex);
base_instance = DefineInput(*this, U32[1], true, spv::BuiltIn::BaseInstance);
}
}
if (info.loads_vertex_id) {
if (profile.support_vertex_instance_id) {
vertex_id = DefineInput(*this, U32[1], true, spv::BuiltIn::VertexId);
} else {
vertex_index = DefineInput(*this, U32[1], true, spv::BuiltIn::VertexIndex);
base_vertex = DefineInput(*this, U32[1], true, spv::BuiltIn::BaseVertex);
}
}
if (info.loads_front_face) {
front_face = DefineInput(*this, U1, true, spv::BuiltIn::FrontFacing);
}
if (info.loads_point_coord) {
point_coord = DefineInput(*this, F32[2], true, spv::BuiltIn::PointCoord);
}
if (info.loads_tess_coord) {
tess_coord = DefineInput(*this, F32[3], false, spv::BuiltIn::TessCoord);
}
for (size_t index = 0; index < info.input_generics.size(); ++index) {
const InputVarying generic{info.input_generics[index]};
if (!generic.used) {
continue;
}
const AttributeType input_type{profile.generic_input_types[index]};
if (input_type == AttributeType::Disabled) {
continue;
}
const Id type{GetAttributeType(*this, input_type)};
const Id id{DefineInput(*this, type, true)};
Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
Name(id, fmt::format("in_attr{}", index));
input_generics[index] = id;
if (stage != Stage::Fragment) {
continue;
}
switch (generic.interpolation) {
case Interpolation::Smooth:
// Default
// Decorate(id, spv::Decoration::Smooth);
break;
case Interpolation::NoPerspective:
Decorate(id, spv::Decoration::NoPerspective);
break;
case Interpolation::Flat:
Decorate(id, spv::Decoration::Flat);
break;
}
}
if (stage == Stage::TessellationEval) {
for (size_t index = 0; index < info.uses_patches.size(); ++index) {
if (!info.uses_patches[index]) {
continue;
}
const Id id{DefineInput(*this, F32[4], false)};
Decorate(id, spv::Decoration::Patch);
Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
patches[index] = id;
}
}
}
void EmitContext::DefineOutputs(const IR::Program& program) {
const Info& info{program.info};
const std::optional<u32> invocations{program.invocations};
if (info.stores_position || stage == Stage::VertexB) {
output_position = DefineOutput(*this, F32[4], invocations, spv::BuiltIn::Position);
}
if (info.stores_point_size || profile.fixed_state_point_size) {
if (stage == Stage::Fragment) {
throw NotImplementedException("Storing PointSize in fragment stage");
}
output_point_size = DefineOutput(*this, F32[1], invocations, spv::BuiltIn::PointSize);
}
if (info.stores_clip_distance) {
if (stage == Stage::Fragment) {
throw NotImplementedException("Storing ClipDistance in fragment stage");
}
const Id type{TypeArray(F32[1], Constant(U32[1], 8U))};
clip_distances = DefineOutput(*this, type, invocations, spv::BuiltIn::ClipDistance);
}
if (info.stores_layer &&
(profile.support_viewport_index_layer_non_geometry || stage == Stage::Geometry)) {
if (stage == Stage::Fragment) {
throw NotImplementedException("Storing Layer in fragment stage");
}
layer = DefineOutput(*this, U32[1], invocations, spv::BuiltIn::Layer);
}
if (info.stores_viewport_index &&
(profile.support_viewport_index_layer_non_geometry || stage == Stage::Geometry)) {
if (stage == Stage::Fragment) {
throw NotImplementedException("Storing ViewportIndex in fragment stage");
}
viewport_index = DefineOutput(*this, U32[1], invocations, spv::BuiltIn::ViewportIndex);
}
if (info.stores_viewport_mask && profile.support_viewport_mask) {
viewport_mask = DefineOutput(*this, TypeArray(U32[1], Constant(U32[1], 1u)), std::nullopt);
}
for (size_t index = 0; index < info.stores_generics.size(); ++index) {
if (info.stores_generics[index]) {
DefineGenericOutput(*this, index, invocations);
}
}
switch (stage) {
case Stage::TessellationControl:
if (info.stores_tess_level_outer) {
const Id type{TypeArray(F32[1], Constant(U32[1], 4))};
output_tess_level_outer =
DefineOutput(*this, type, std::nullopt, spv::BuiltIn::TessLevelOuter);
Decorate(output_tess_level_outer, spv::Decoration::Patch);
}
if (info.stores_tess_level_inner) {
const Id type{TypeArray(F32[1], Constant(U32[1], 2))};
output_tess_level_inner =
DefineOutput(*this, type, std::nullopt, spv::BuiltIn::TessLevelInner);
Decorate(output_tess_level_inner, spv::Decoration::Patch);
}
for (size_t index = 0; index < info.uses_patches.size(); ++index) {
if (!info.uses_patches[index]) {
continue;
}
const Id id{DefineOutput(*this, F32[4], std::nullopt)};
Decorate(id, spv::Decoration::Patch);
Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
patches[index] = id;
}
break;
case Stage::Fragment:
for (u32 index = 0; index < 8; ++index) {
if (!info.stores_frag_color[index]) {
continue;
}
frag_color[index] = DefineOutput(*this, F32[4], std::nullopt);
Decorate(frag_color[index], spv::Decoration::Location, index);
Name(frag_color[index], fmt::format("frag_color{}", index));
}
if (info.stores_frag_depth) {
frag_depth = DefineOutput(*this, F32[1], std::nullopt);
Decorate(frag_depth, spv::Decoration::BuiltIn, spv::BuiltIn::FragDepth);
Name(frag_depth, "frag_depth");
}
break;
default:
break;
}
}
} // namespace Shader::Backend::SPIRV
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