vk_shader_decompiler: Implement declarations
This commit is contained in:
ReinUsesLisp
parent
ad53b233c5
commit
13aa664f3f
@ -2,38 +2,492 @@
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <functional>
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#include <map>
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#include <set>
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#include <fmt/format.h>
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#include <sirit/sirit.h>
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#include "common/alignment.h"
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#include "common/assert.h"
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "video_core/engines/maxwell_3d.h"
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#include "video_core/engines/shader_bytecode.h"
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#include "video_core/engines/shader_header.h"
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#include "video_core/renderer_vulkan/vk_shader_decompiler.h"
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#include "video_core/shader/shader_ir.h"
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namespace Vulkan::VKShader {
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using Sirit::Id;
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using Tegra::Shader::Attribute;
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using Tegra::Shader::AttributeUse;
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using Tegra::Shader::Register;
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using namespace VideoCommon::Shader;
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using Maxwell = Tegra::Engines::Maxwell3D::Regs;
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using ShaderStage = Tegra::Engines::Maxwell3D::Regs::ShaderStage;
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// TODO(Rodrigo): Use rasterizer's value
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constexpr u32 MAX_CONSTBUFFER_ELEMENTS = 0x1000;
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constexpr u32 STAGE_BINDING_STRIDE = 0x100;
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enum class Type { Bool, Bool2, Float, Int, Uint, HalfFloat };
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struct SamplerImage {
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Id image_type;
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Id sampled_image_type;
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Id sampler;
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};
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namespace {
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spv::Dim GetSamplerDim(const Sampler& sampler) {
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switch (sampler.GetType()) {
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case Tegra::Shader::TextureType::Texture1D:
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return spv::Dim::Dim1D;
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case Tegra::Shader::TextureType::Texture2D:
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return spv::Dim::Dim2D;
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case Tegra::Shader::TextureType::Texture3D:
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return spv::Dim::Dim3D;
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case Tegra::Shader::TextureType::TextureCube:
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return spv::Dim::Cube;
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default:
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UNIMPLEMENTED_MSG("Unimplemented sampler type={}", static_cast<u32>(sampler.GetType()));
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return spv::Dim::Dim2D;
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}
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}
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/// Returns true if an attribute index is one of the 32 generic attributes
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constexpr bool IsGenericAttribute(Attribute::Index attribute) {
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return attribute >= Attribute::Index::Attribute_0 &&
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attribute <= Attribute::Index::Attribute_31;
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}
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/// Returns the location of a generic attribute
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constexpr u32 GetGenericAttributeLocation(Attribute::Index attribute) {
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ASSERT(IsGenericAttribute(attribute));
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return static_cast<u32>(attribute) - static_cast<u32>(Attribute::Index::Attribute_0);
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}
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} // namespace
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class SPIRVDecompiler : public Sirit::Module {
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public:
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explicit SPIRVDecompiler(const ShaderIR& ir, ShaderStage stage)
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: Module(0x00010300), ir{ir}, stage{stage}, header{ir.GetHeader()} {}
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: Module(0x00010300), ir{ir}, stage{stage}, header{ir.GetHeader()} {
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AddCapability(spv::Capability::Shader);
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AddExtension("SPV_KHR_storage_buffer_storage_class");
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AddExtension("SPV_KHR_variable_pointers");
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}
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void Decompile() {
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AllocateBindings();
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DeclareVertex();
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DeclareGeometry();
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DeclareFragment();
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DeclareRegisters();
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DeclarePredicates();
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DeclareLocalMemory();
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DeclareInternalFlags();
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DeclareInputAttributes();
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DeclareOutputAttributes();
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DeclareConstantBuffers();
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DeclareGlobalBuffers();
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DeclareSamplers();
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UNIMPLEMENTED();
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}
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ShaderEntries GetShaderEntries() const {
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UNIMPLEMENTED();
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return {};
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ShaderEntries entries;
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entries.const_buffers_base_binding = const_buffers_base_binding;
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entries.global_buffers_base_binding = global_buffers_base_binding;
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entries.samplers_base_binding = samplers_base_binding;
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for (const auto& cbuf : ir.GetConstantBuffers()) {
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entries.const_buffers.emplace_back(cbuf.second, cbuf.first);
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}
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for (const auto& gmem : ir.GetGlobalMemoryBases()) {
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entries.global_buffers.emplace_back(gmem.cbuf_index, gmem.cbuf_offset);
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}
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for (const auto& sampler : ir.GetSamplers()) {
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entries.samplers.emplace_back(sampler);
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}
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for (const auto& attr : ir.GetInputAttributes()) {
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entries.attributes.insert(GetGenericAttributeLocation(attr.first));
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}
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entries.clip_distances = ir.GetClipDistances();
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entries.shader_length = ir.GetLength();
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entries.entry_function = execute_function;
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entries.interfaces = interfaces;
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return entries;
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}
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private:
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static constexpr auto INTERNAL_FLAGS_COUNT = static_cast<std::size_t>(InternalFlag::Amount);
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static constexpr u32 CBUF_STRIDE = 16;
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void AllocateBindings() {
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const u32 binding_base = static_cast<u32>(stage) * STAGE_BINDING_STRIDE;
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u32 binding_iterator = binding_base;
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const auto Allocate = [&binding_iterator](std::size_t count) {
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const u32 current_binding = binding_iterator;
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binding_iterator += static_cast<u32>(count);
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return current_binding;
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};
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const_buffers_base_binding = Allocate(ir.GetConstantBuffers().size());
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global_buffers_base_binding = Allocate(ir.GetGlobalMemoryBases().size());
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samplers_base_binding = Allocate(ir.GetSamplers().size());
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ASSERT_MSG(binding_iterator - binding_base < STAGE_BINDING_STRIDE,
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"Stage binding stride is too small");
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}
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void DeclareVertex() {
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if (stage != ShaderStage::Vertex)
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return;
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DeclareVertexRedeclarations();
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}
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void DeclareGeometry() {
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if (stage != ShaderStage::Geometry)
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return;
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UNIMPLEMENTED();
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}
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void DeclareFragment() {
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if (stage != ShaderStage::Fragment)
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return;
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for (u32 rt = 0; rt < static_cast<u32>(frag_colors.size()); ++rt) {
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if (!IsRenderTargetUsed(rt)) {
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continue;
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}
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const Id id = AddGlobalVariable(OpVariable(t_out_float4, spv::StorageClass::Output));
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Name(id, fmt::format("frag_color{}", rt));
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Decorate(id, spv::Decoration::Location, rt);
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frag_colors[rt] = id;
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interfaces.push_back(id);
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}
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if (header.ps.omap.depth) {
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frag_depth = AddGlobalVariable(OpVariable(t_out_float, spv::StorageClass::Output));
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Name(frag_depth, "frag_depth");
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Decorate(frag_depth, spv::Decoration::BuiltIn,
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static_cast<u32>(spv::BuiltIn::FragDepth));
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interfaces.push_back(frag_depth);
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}
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frag_coord = DeclareBuiltIn(spv::BuiltIn::FragCoord, spv::StorageClass::Input, t_in_float4,
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"frag_coord");
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front_facing = DeclareBuiltIn(spv::BuiltIn::FrontFacing, spv::StorageClass::Input,
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t_in_bool, "front_facing");
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}
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void DeclareRegisters() {
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for (const u32 gpr : ir.GetRegisters()) {
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const Id id = OpVariable(t_prv_float, spv::StorageClass::Private, v_float_zero);
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Name(id, fmt::format("gpr_{}", gpr));
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registers.emplace(gpr, AddGlobalVariable(id));
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}
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}
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void DeclarePredicates() {
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for (const auto pred : ir.GetPredicates()) {
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const Id id = OpVariable(t_prv_bool, spv::StorageClass::Private, v_false);
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Name(id, fmt::format("pred_{}", static_cast<u32>(pred)));
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predicates.emplace(pred, AddGlobalVariable(id));
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}
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}
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void DeclareLocalMemory() {
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if (const u64 local_memory_size = header.GetLocalMemorySize(); local_memory_size > 0) {
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const auto element_count = static_cast<u32>(Common::AlignUp(local_memory_size, 4) / 4);
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const Id type_array = TypeArray(t_float, Constant(t_uint, element_count));
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const Id type_pointer = TypePointer(spv::StorageClass::Private, type_array);
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Name(type_pointer, "LocalMemory");
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local_memory =
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OpVariable(type_pointer, spv::StorageClass::Private, ConstantNull(type_array));
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AddGlobalVariable(Name(local_memory, "local_memory"));
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}
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}
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void DeclareInternalFlags() {
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constexpr std::array<const char*, INTERNAL_FLAGS_COUNT> names = {"zero", "sign", "carry",
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"overflow"};
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for (std::size_t flag = 0; flag < INTERNAL_FLAGS_COUNT; ++flag) {
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const auto flag_code = static_cast<InternalFlag>(flag);
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const Id id = OpVariable(t_prv_bool, spv::StorageClass::Private, v_false);
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internal_flags[flag] = AddGlobalVariable(Name(id, names[flag]));
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}
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}
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void DeclareInputAttributes() {
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for (const auto element : ir.GetInputAttributes()) {
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const Attribute::Index index = element.first;
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if (!IsGenericAttribute(index)) {
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continue;
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}
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UNIMPLEMENTED_IF(stage == ShaderStage::Geometry);
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const u32 location = GetGenericAttributeLocation(index);
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const Id id = OpVariable(t_in_float4, spv::StorageClass::Input);
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Name(AddGlobalVariable(id), fmt::format("in_attr{}", location));
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input_attributes.emplace(index, id);
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interfaces.push_back(id);
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Decorate(id, spv::Decoration::Location, location);
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if (stage != ShaderStage::Fragment) {
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continue;
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}
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switch (header.ps.GetAttributeUse(location)) {
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case AttributeUse::Constant:
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Decorate(id, spv::Decoration::Flat);
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break;
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case AttributeUse::ScreenLinear:
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Decorate(id, spv::Decoration::NoPerspective);
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break;
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case AttributeUse::Perspective:
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// Default
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break;
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default:
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UNREACHABLE_MSG("Unused attribute being fetched");
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}
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}
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}
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void DeclareOutputAttributes() {
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for (const auto index : ir.GetOutputAttributes()) {
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if (!IsGenericAttribute(index)) {
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continue;
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}
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const auto location = GetGenericAttributeLocation(index);
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const Id id = OpVariable(t_out_float4, spv::StorageClass::Output);
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Name(AddGlobalVariable(id), fmt::format("out_attr{}", location));
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output_attributes.emplace(index, id);
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interfaces.push_back(id);
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Decorate(id, spv::Decoration::Location, location);
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}
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}
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void DeclareConstantBuffers() {
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u32 binding = const_buffers_base_binding;
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for (const auto& entry : ir.GetConstantBuffers()) {
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const auto [index, size] = entry;
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const Id id = OpVariable(t_cbuf_ubo, spv::StorageClass::Uniform);
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AddGlobalVariable(Name(id, fmt::format("cbuf_{}", index)));
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Decorate(id, spv::Decoration::Binding, binding++);
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Decorate(id, spv::Decoration::DescriptorSet, DESCRIPTOR_SET);
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constant_buffers.emplace(index, id);
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}
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}
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void DeclareGlobalBuffers() {
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u32 binding = global_buffers_base_binding;
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for (const auto& entry : ir.GetGlobalMemoryBases()) {
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const Id id = OpVariable(t_gmem_ssbo, spv::StorageClass::StorageBuffer);
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AddGlobalVariable(
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Name(id, fmt::format("gmem_{}_{}", entry.cbuf_index, entry.cbuf_offset)));
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Decorate(id, spv::Decoration::Binding, binding++);
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Decorate(id, spv::Decoration::DescriptorSet, DESCRIPTOR_SET);
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global_buffers.emplace(entry, id);
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}
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}
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void DeclareSamplers() {
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u32 binding = samplers_base_binding;
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for (const auto& sampler : ir.GetSamplers()) {
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const auto dim = GetSamplerDim(sampler);
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const int depth = sampler.IsShadow() ? 1 : 0;
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const int arrayed = sampler.IsArray() ? 1 : 0;
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// TODO(Rodrigo): Sampled 1 indicates that the image will be used with a sampler. When
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// SULD and SUST instructions are implemented, replace this value.
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const int sampled = 1;
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const Id image_type =
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TypeImage(t_float, dim, depth, arrayed, false, sampled, spv::ImageFormat::Unknown);
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const Id sampled_image_type = TypeSampledImage(image_type);
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const Id pointer_type =
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TypePointer(spv::StorageClass::UniformConstant, sampled_image_type);
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const Id id = OpVariable(pointer_type, spv::StorageClass::UniformConstant);
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AddGlobalVariable(Name(id, fmt::format("sampler_{}", sampler.GetIndex())));
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sampler_images.insert(
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{static_cast<u32>(sampler.GetIndex()), {image_type, sampled_image_type, id}});
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Decorate(id, spv::Decoration::Binding, binding++);
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Decorate(id, spv::Decoration::DescriptorSet, DESCRIPTOR_SET);
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}
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}
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void DeclareVertexRedeclarations() {
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vertex_index = DeclareBuiltIn(spv::BuiltIn::VertexIndex, spv::StorageClass::Input,
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t_in_uint, "vertex_index");
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instance_index = DeclareBuiltIn(spv::BuiltIn::InstanceIndex, spv::StorageClass::Input,
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t_in_uint, "instance_index");
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bool is_point_size_declared = false;
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bool is_clip_distances_declared = false;
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for (const auto index : ir.GetOutputAttributes()) {
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if (index == Attribute::Index::PointSize) {
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is_point_size_declared = true;
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} else if (index == Attribute::Index::ClipDistances0123 ||
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index == Attribute::Index::ClipDistances4567) {
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is_clip_distances_declared = true;
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}
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}
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std::vector<Id> members;
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members.push_back(t_float4);
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if (is_point_size_declared) {
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members.push_back(t_float);
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}
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if (is_clip_distances_declared) {
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members.push_back(TypeArray(t_float, Constant(t_uint, 8)));
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}
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const Id gl_per_vertex_struct = Name(TypeStruct(members), "PerVertex");
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Decorate(gl_per_vertex_struct, spv::Decoration::Block);
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u32 declaration_index = 0;
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const auto MemberDecorateBuiltIn = [&](spv::BuiltIn builtin, std::string name,
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bool condition) {
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if (!condition)
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return u32{};
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MemberName(gl_per_vertex_struct, declaration_index, name);
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MemberDecorate(gl_per_vertex_struct, declaration_index, spv::Decoration::BuiltIn,
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static_cast<u32>(builtin));
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return declaration_index++;
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};
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position_index = MemberDecorateBuiltIn(spv::BuiltIn::Position, "position", true);
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point_size_index =
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MemberDecorateBuiltIn(spv::BuiltIn::PointSize, "point_size", is_point_size_declared);
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clip_distances_index = MemberDecorateBuiltIn(spv::BuiltIn::ClipDistance, "clip_distances",
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is_clip_distances_declared);
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const Id type_pointer = TypePointer(spv::StorageClass::Output, gl_per_vertex_struct);
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per_vertex = OpVariable(type_pointer, spv::StorageClass::Output);
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AddGlobalVariable(Name(per_vertex, "per_vertex"));
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interfaces.push_back(per_vertex);
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}
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Id DeclareBuiltIn(spv::BuiltIn builtin, spv::StorageClass storage, Id type,
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const std::string& name) {
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const Id id = OpVariable(type, storage);
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Decorate(id, spv::Decoration::BuiltIn, static_cast<u32>(builtin));
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AddGlobalVariable(Name(id, name));
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interfaces.push_back(id);
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return id;
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}
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bool IsRenderTargetUsed(u32 rt) const {
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for (u32 component = 0; component < 4; ++component) {
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if (header.ps.IsColorComponentOutputEnabled(rt, component)) {
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return true;
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}
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}
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return false;
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}
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const ShaderIR& ir;
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const ShaderStage stage;
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const Tegra::Shader::Header header;
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const Id t_void = Name(TypeVoid(), "void");
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const Id t_bool = Name(TypeBool(), "bool");
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const Id t_bool2 = Name(TypeVector(t_bool, 2), "bool2");
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const Id t_int = Name(TypeInt(32, true), "int");
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const Id t_int2 = Name(TypeVector(t_int, 2), "int2");
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const Id t_int3 = Name(TypeVector(t_int, 3), "int3");
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const Id t_int4 = Name(TypeVector(t_int, 4), "int4");
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const Id t_uint = Name(TypeInt(32, false), "uint");
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const Id t_uint2 = Name(TypeVector(t_uint, 2), "uint2");
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const Id t_uint3 = Name(TypeVector(t_uint, 3), "uint3");
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const Id t_uint4 = Name(TypeVector(t_uint, 4), "uint4");
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const Id t_float = Name(TypeFloat(32), "float");
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const Id t_float2 = Name(TypeVector(t_float, 2), "float2");
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const Id t_float3 = Name(TypeVector(t_float, 3), "float3");
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const Id t_float4 = Name(TypeVector(t_float, 4), "float4");
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const Id t_prv_bool = Name(TypePointer(spv::StorageClass::Private, t_bool), "prv_bool");
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const Id t_prv_float = Name(TypePointer(spv::StorageClass::Private, t_float), "prv_float");
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const Id t_in_bool = Name(TypePointer(spv::StorageClass::Input, t_bool), "in_bool");
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const Id t_in_uint = Name(TypePointer(spv::StorageClass::Input, t_uint), "in_uint");
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const Id t_in_float = Name(TypePointer(spv::StorageClass::Input, t_float), "in_float");
|
||||
const Id t_in_float4 = Name(TypePointer(spv::StorageClass::Input, t_float4), "in_float4");
|
||||
|
||||
const Id t_out_float = Name(TypePointer(spv::StorageClass::Output, t_float), "out_float");
|
||||
const Id t_out_float4 = Name(TypePointer(spv::StorageClass::Output, t_float4), "out_float4");
|
||||
|
||||
const Id t_cbuf_float = TypePointer(spv::StorageClass::Uniform, t_float);
|
||||
const Id t_cbuf_array =
|
||||
Decorate(Name(TypeArray(t_float4, Constant(t_uint, MAX_CONSTBUFFER_ELEMENTS)), "CbufArray"),
|
||||
spv::Decoration::ArrayStride, CBUF_STRIDE);
|
||||
const Id t_cbuf_struct = MemberDecorate(
|
||||
Decorate(TypeStruct(t_cbuf_array), spv::Decoration::Block), 0, spv::Decoration::Offset, 0);
|
||||
const Id t_cbuf_ubo = TypePointer(spv::StorageClass::Uniform, t_cbuf_struct);
|
||||
|
||||
const Id t_gmem_float = TypePointer(spv::StorageClass::StorageBuffer, t_float);
|
||||
const Id t_gmem_array =
|
||||
Name(Decorate(TypeRuntimeArray(t_float), spv::Decoration::ArrayStride, 4u), "GmemArray");
|
||||
const Id t_gmem_struct = MemberDecorate(
|
||||
Decorate(TypeStruct(t_gmem_array), spv::Decoration::Block), 0, spv::Decoration::Offset, 0);
|
||||
const Id t_gmem_ssbo = TypePointer(spv::StorageClass::StorageBuffer, t_gmem_struct);
|
||||
|
||||
const Id v_float_zero = Constant(t_float, 0.0f);
|
||||
const Id v_true = ConstantTrue(t_bool);
|
||||
const Id v_false = ConstantFalse(t_bool);
|
||||
|
||||
Id per_vertex{};
|
||||
std::map<u32, Id> registers;
|
||||
std::map<Tegra::Shader::Pred, Id> predicates;
|
||||
Id local_memory{};
|
||||
std::array<Id, INTERNAL_FLAGS_COUNT> internal_flags{};
|
||||
std::map<Attribute::Index, Id> input_attributes;
|
||||
std::map<Attribute::Index, Id> output_attributes;
|
||||
std::map<u32, Id> constant_buffers;
|
||||
std::map<GlobalMemoryBase, Id> global_buffers;
|
||||
std::map<u32, SamplerImage> sampler_images;
|
||||
|
||||
Id instance_index{};
|
||||
Id vertex_index{};
|
||||
std::array<Id, Maxwell::NumRenderTargets> frag_colors{};
|
||||
Id frag_depth{};
|
||||
Id frag_coord{};
|
||||
Id front_facing{};
|
||||
|
||||
u32 position_index{};
|
||||
u32 point_size_index{};
|
||||
u32 clip_distances_index{};
|
||||
|
||||
std::vector<Id> interfaces;
|
||||
|
||||
u32 const_buffers_base_binding{};
|
||||
u32 global_buffers_base_binding{};
|
||||
u32 samplers_base_binding{};
|
||||
|
||||
Id execute_function{};
|
||||
};
|
||||
|
||||
DecompilerResult Decompile(const VideoCommon::Shader::ShaderIR& ir, Maxwell::ShaderStage stage) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user