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Merge pull request #1927 from ReinUsesLisp/shader-ir

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video_core: Replace gl_shader_decompiler with an IR based decompiler
This commit is contained in:
bunnei 2019-01-25 23:42:14 -05:00 committed by GitHub
commit 1f4ca1e841
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GPG Key ID: 4AEE18F83AFDEB23
39 changed files with 5675 additions and 3986 deletions
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28
src/video_core/CMakeLists.txt
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@ -59,6 +59,34 @@ add_library(video_core STATIC
renderer_opengl/renderer_opengl.h
renderer_opengl/utils.cpp
renderer_opengl/utils.h
shader/decode/arithmetic.cpp
shader/decode/arithmetic_immediate.cpp
shader/decode/bfe.cpp
shader/decode/bfi.cpp
shader/decode/shift.cpp
shader/decode/arithmetic_integer.cpp
shader/decode/arithmetic_integer_immediate.cpp
shader/decode/arithmetic_half.cpp
shader/decode/arithmetic_half_immediate.cpp
shader/decode/ffma.cpp
shader/decode/hfma2.cpp
shader/decode/conversion.cpp
shader/decode/memory.cpp
shader/decode/float_set_predicate.cpp
shader/decode/integer_set_predicate.cpp
shader/decode/half_set_predicate.cpp
shader/decode/predicate_set_register.cpp
shader/decode/predicate_set_predicate.cpp
shader/decode/register_set_predicate.cpp
shader/decode/float_set.cpp
shader/decode/integer_set.cpp
shader/decode/half_set.cpp
shader/decode/video.cpp
shader/decode/xmad.cpp
shader/decode/other.cpp
shader/decode.cpp
shader/shader_ir.cpp
shader/shader_ir.h
surface.cpp
surface.h
textures/astc.cpp

10
src/video_core/engines/shader_bytecode.h
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@ -397,6 +397,10 @@ struct IpaMode {
bool operator!=(const IpaMode& a) const {
return !operator==(a);
}
bool operator<(const IpaMode& a) const {
return std::tie(interpolation_mode, sampling_mode) <
std::tie(a.interpolation_mode, a.sampling_mode);
}
};
enum class SystemVariable : u64 {
@ -644,6 +648,7 @@ union Instruction {
BitField<37, 2, HalfPrecision> precision;
BitField<32, 1, u64> saturate;
BitField<31, 1, u64> negate_b;
BitField<30, 1, u64> negate_c;
BitField<35, 2, HalfType> type_c;
} rr;
@ -1431,6 +1436,7 @@ public:
PredicateSetRegister,
RegisterSetPredicate,
Conversion,
Video,
Xmad,
Unknown,
};
@ -1562,8 +1568,8 @@ private:
INST("11100000--------", Id::IPA, Type::Trivial, "IPA"),
INST("1111101111100---", Id::OUT_R, Type::Trivial, "OUT_R"),
INST("1110111111010---", Id::ISBERD, Type::Trivial, "ISBERD"),
INST("01011111--------", Id::VMAD, Type::Trivial, "VMAD"),
INST("0101000011110---", Id::VSETP, Type::Trivial, "VSETP"),
INST("01011111--------", Id::VMAD, Type::Video, "VMAD"),
INST("0101000011110---", Id::VSETP, Type::Video, "VSETP"),
INST("0011001-1-------", Id::FFMA_IMM, Type::Ffma, "FFMA_IMM"),
INST("010010011-------", Id::FFMA_CR, Type::Ffma, "FFMA_CR"),
INST("010100011-------", Id::FFMA_RC, Type::Ffma, "FFMA_RC"),

2
src/video_core/engines/shader_header.h
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@ -106,7 +106,7 @@ struct Header {
} ps;
};
u64 GetLocalMemorySize() {
u64 GetLocalMemorySize() const {
return (common1.shader_local_memory_low_size |
(common2.shader_local_memory_high_size << 24));
}

4
src/video_core/renderer_opengl/gl_rasterizer.cpp
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@ -930,7 +930,7 @@ u32 RasterizerOpenGL::SetupConstBuffers(Maxwell::ShaderStage stage, Shader& shad
const auto& gpu = Core::System::GetInstance().GPU();
const auto& maxwell3d = gpu.Maxwell3D();
const auto& shader_stage = maxwell3d.state.shader_stages[static_cast<std::size_t>(stage)];
const auto& entries = shader->GetShaderEntries().const_buffer_entries;
const auto& entries = shader->GetShaderEntries().const_buffers;
constexpr u64 max_binds = Tegra::Engines::Maxwell3D::Regs::MaxConstBuffers;
std::array<GLuint, max_binds> bind_buffers;
@ -998,7 +998,7 @@ u32 RasterizerOpenGL::SetupTextures(Maxwell::ShaderStage stage, Shader& shader,
MICROPROFILE_SCOPE(OpenGL_Texture);
const auto& gpu = Core::System::GetInstance().GPU();
const auto& maxwell3d = gpu.Maxwell3D();
const auto& entries = shader->GetShaderEntries().texture_samplers;
const auto& entries = shader->GetShaderEntries().samplers;
ASSERT_MSG(current_unit + entries.size() <= std::size(state.texture_units),
"Exceeded the number of active textures.");

8
src/video_core/renderer_opengl/gl_shader_cache.cpp
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@ -10,11 +10,15 @@
#include "video_core/engines/maxwell_3d.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/gl_shader_cache.h"
#include "video_core/renderer_opengl/gl_shader_decompiler.h"
#include "video_core/renderer_opengl/gl_shader_manager.h"
#include "video_core/renderer_opengl/utils.h"
#include "video_core/shader/shader_ir.h"
namespace OpenGL {
using VideoCommon::Shader::ProgramCode;
/// Gets the address for the specified shader stage program
static VAddr GetShaderAddress(Maxwell::ShaderProgram program) {
const auto& gpu = Core::System::GetInstance().GPU().Maxwell3D();
@ -24,8 +28,8 @@ static VAddr GetShaderAddress(Maxwell::ShaderProgram program) {
}
/// Gets the shader program code from memory for the specified address
static GLShader::ProgramCode GetShaderCode(VAddr addr) {
GLShader::ProgramCode program_code(GLShader::MAX_PROGRAM_CODE_LENGTH);
static ProgramCode GetShaderCode(VAddr addr) {
ProgramCode program_code(VideoCommon::Shader::MAX_PROGRAM_LENGTH);
Memory::ReadBlock(addr, program_code.data(), program_code.size() * sizeof(u64));
return program_code;
}

1
src/video_core/renderer_opengl/gl_shader_cache.h
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@ -12,6 +12,7 @@
#include "common/common_types.h"
#include "video_core/rasterizer_cache.h"
#include "video_core/renderer_opengl/gl_resource_manager.h"
#include "video_core/renderer_opengl/gl_shader_decompiler.h"
#include "video_core/renderer_opengl/gl_shader_gen.h"
namespace OpenGL {

5098
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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File diff suppressed because it is too large Load Diff

81
src/video_core/renderer_opengl/gl_shader_decompiler.h
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@ -5,21 +5,84 @@
#pragma once
#include <array>
#include <functional>
#include <optional>
#include <string>
#include <utility>
#include <vector>
#include "common/common_types.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/renderer_opengl/gl_shader_gen.h"
#include "video_core/shader/shader_ir.h"
namespace OpenGL::GLShader::Decompiler {
namespace VideoCommon::Shader {
class ShaderIR;
}
using Tegra::Engines::Maxwell3D;
namespace OpenGL::GLShader {
using Maxwell = Tegra::Engines::Maxwell3D::Regs;
class ConstBufferEntry : public VideoCommon::Shader::ConstBuffer {
public:
explicit ConstBufferEntry(const VideoCommon::Shader::ConstBuffer& entry,
Maxwell::ShaderStage stage, const std::string& name, u32 index)
: VideoCommon::Shader::ConstBuffer{entry}, stage{stage}, name{name}, index{index} {}
const std::string& GetName() const {
return name;
}
Maxwell::ShaderStage GetStage() const {
return stage;
}
u32 GetIndex() const {
return index;
}
u32 GetHash() const {
return (static_cast<u32>(stage) << 16) | index;
}
private:
std::string name;
Maxwell::ShaderStage stage{};
u32 index{};
};
class SamplerEntry : public VideoCommon::Shader::Sampler {
public:
explicit SamplerEntry(const VideoCommon::Shader::Sampler& entry, Maxwell::ShaderStage stage,
const std::string& name)
: VideoCommon::Shader::Sampler{entry}, stage{stage}, name{name} {}
const std::string& GetName() const {
return name;
}
Maxwell::ShaderStage GetStage() const {
return stage;
}
u32 GetHash() const {
return (static_cast<u32>(stage) << 16) | static_cast<u32>(GetIndex());
}
private:
std::string name;
Maxwell::ShaderStage stage{};
};
struct ShaderEntries {
std::vector<ConstBufferEntry> const_buffers;
std::vector<SamplerEntry> samplers;
std::array<bool, Maxwell::NumClipDistances> clip_distances{};
std::size_t shader_length{};
};
using ProgramResult = std::pair<std::string, ShaderEntries>;
std::string GetCommonDeclarations();
std::optional<ProgramResult> DecompileProgram(const ProgramCode& program_code, u32 main_offset,
Maxwell3D::Regs::ShaderStage stage,
const std::string& suffix);
ProgramResult Decompile(const VideoCommon::Shader::ShaderIR& ir, Maxwell::ShaderStage stage,
const std::string& suffix);
} // namespace OpenGL::GLShader::Decompiler
} // namespace OpenGL::GLShader

104
src/video_core/renderer_opengl/gl_shader_gen.cpp
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@ -7,22 +7,25 @@
#include "video_core/engines/maxwell_3d.h"
#include "video_core/renderer_opengl/gl_shader_decompiler.h"
#include "video_core/renderer_opengl/gl_shader_gen.h"
#include "video_core/shader/shader_ir.h"
namespace OpenGL::GLShader {
using Tegra::Engines::Maxwell3D;
using VideoCommon::Shader::ProgramCode;
using VideoCommon::Shader::ShaderIR;
static constexpr u32 PROGRAM_OFFSET{10};
ProgramResult GenerateVertexShader(const ShaderSetup& setup) {
const std::string id = fmt::format("{:016x}", setup.program.unique_identifier);
std::string out = "#version 430 core\n";
out += "#extension GL_ARB_separate_shader_objects : enable\n\n";
const std::string id = fmt::format("{:016x}", setup.program.unique_identifier);
out += "// Shader Unique Id: VS" + id + "\n\n";
out += Decompiler::GetCommonDeclarations();
out += GetCommonDeclarations();
out += R"(
layout (location = 0) out vec4 position;
layout(std140) uniform vs_config {
@ -30,40 +33,32 @@ layout(std140) uniform vs_config {
uvec4 config_pack; // instance_id, flip_stage, y_direction, padding
uvec4 alpha_test;
};
)";
if (setup.IsDualProgram()) {
out += "bool exec_vertex_b();\n";
}
ProgramResult program =
Decompiler::DecompileProgram(setup.program.code, PROGRAM_OFFSET,
Maxwell3D::Regs::ShaderStage::Vertex, "vertex")
.value_or(ProgramResult());
ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET);
ProgramResult program = Decompile(program_ir, Maxwell3D::Regs::ShaderStage::Vertex, "vertex");
out += program.first;
if (setup.IsDualProgram()) {
ShaderIR program_ir_b(setup.program.code_b, PROGRAM_OFFSET);
ProgramResult program_b =
Decompiler::DecompileProgram(setup.program.code_b, PROGRAM_OFFSET,
Maxwell3D::Regs::ShaderStage::Vertex, "vertex_b")
.value_or(ProgramResult());
Decompile(program_ir_b, Maxwell3D::Regs::ShaderStage::Vertex, "vertex_b");
out += program_b.first;
}
out += R"(
void main() {
position = vec4(0.0, 0.0, 0.0, 0.0);
exec_vertex();
execute_vertex();
)";
if (setup.IsDualProgram()) {
out += " exec_vertex_b();";
out += " execute_vertex_b();";
}
out += R"(
// Check if the flip stage is VertexB
// Config pack's second value is flip_stage
if (config_pack[1] == 1) {
@ -77,30 +72,20 @@ void main() {
if (config_pack[1] == 1) {
position.w = 1.0;
}
}
)";
})";
return {out, program.second};
}
ProgramResult GenerateGeometryShader(const ShaderSetup& setup) {
// Version is intentionally skipped in shader generation, it's added by the lazy compilation.
std::string out = "#extension GL_ARB_separate_shader_objects : enable\n\n";
const std::string id = fmt::format("{:016x}", setup.program.unique_identifier);
std::string out = "#extension GL_ARB_separate_shader_objects : enable\n\n";
out += "// Shader Unique Id: GS" + id + "\n\n";
out += Decompiler::GetCommonDeclarations();
out += "bool exec_geometry();\n";
out += GetCommonDeclarations();
ProgramResult program =
Decompiler::DecompileProgram(setup.program.code, PROGRAM_OFFSET,
Maxwell3D::Regs::ShaderStage::Geometry, "geometry")
.value_or(ProgramResult());
out += R"(
out gl_PerVertex {
vec4 gl_Position;
};
layout (location = 0) in vec4 gs_position[];
layout (location = 0) out vec4 position;
@ -110,36 +95,37 @@ layout (std140) uniform gs_config {
uvec4 alpha_test;
};
void main() {
exec_geometry();
}
)";
ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET);
ProgramResult program =
Decompile(program_ir, Maxwell3D::Regs::ShaderStage::Geometry, "geometry");
out += program.first;
out += R"(
void main() {
execute_geometry();
};)";
return {out, program.second};
}
ProgramResult GenerateFragmentShader(const ShaderSetup& setup) {
const std::string id = fmt::format("{:016x}", setup.program.unique_identifier);
std::string out = "#version 430 core\n";
out += "#extension GL_ARB_separate_shader_objects : enable\n\n";
const std::string id = fmt::format("{:016x}", setup.program.unique_identifier);
out += "// Shader Unique Id: FS" + id + "\n\n";
out += Decompiler::GetCommonDeclarations();
out += "bool exec_fragment();\n";
out += GetCommonDeclarations();
ProgramResult program =
Decompiler::DecompileProgram(setup.program.code, PROGRAM_OFFSET,
Maxwell3D::Regs::ShaderStage::Fragment, "fragment")
.value_or(ProgramResult());
out += R"(
layout(location = 0) out vec4 FragColor0;
layout(location = 1) out vec4 FragColor1;
layout(location = 2) out vec4 FragColor2;
layout(location = 3) out vec4 FragColor3;
layout(location = 4) out vec4 FragColor4;
layout(location = 5) out vec4 FragColor5;
layout(location = 6) out vec4 FragColor6;
layout(location = 7) out vec4 FragColor7;
layout (location = 0) out vec4 FragColor0;
layout (location = 1) out vec4 FragColor1;
layout (location = 2) out vec4 FragColor2;
layout (location = 3) out vec4 FragColor3;
layout (location = 4) out vec4 FragColor4;
layout (location = 5) out vec4 FragColor5;
layout (location = 6) out vec4 FragColor6;
layout (location = 7) out vec4 FragColor7;
layout (location = 0) in vec4 position;
@ -173,12 +159,20 @@ bool AlphaFunc(in float value) {
}
}
)";
ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET);
ProgramResult program =
Decompile(program_ir, Maxwell3D::Regs::ShaderStage::Fragment, "fragment");
out += program.first;
out += R"(
void main() {
exec_fragment();
execute_fragment();
}
)";
out += program.first;
return {out, program.second};
}
} // namespace OpenGL::GLShader
} // namespace OpenGL::GLShader

158
src/video_core/renderer_opengl/gl_shader_gen.h
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@ -10,164 +10,12 @@
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/renderer_opengl/gl_shader_decompiler.h"
#include "video_core/shader/shader_ir.h"
namespace OpenGL::GLShader {
constexpr std::size_t MAX_PROGRAM_CODE_LENGTH{0x1000};
using ProgramCode = std::vector<u64>;
enum : u32 { POSITION_VARYING_LOCATION = 0, GENERIC_VARYING_START_LOCATION = 1 };
class ConstBufferEntry {
using Maxwell = Tegra::Engines::Maxwell3D::Regs;
public:
void MarkAsUsed(u64 index, u64 offset, Maxwell::ShaderStage stage) {
is_used = true;
this->index = static_cast<unsigned>(index);
this->stage = stage;
max_offset = std::max(max_offset, static_cast<unsigned>(offset));
}
void MarkAsUsedIndirect(u64 index, Maxwell::ShaderStage stage) {
is_used = true;
is_indirect = true;
this->index = static_cast<unsigned>(index);
this->stage = stage;
}
bool IsUsed() const {
return is_used;
}
bool IsIndirect() const {
return is_indirect;
}
unsigned GetIndex() const {
return index;
}
unsigned GetSize() const {
return max_offset + 1;
}
std::string GetName() const {
return BufferBaseNames[static_cast<std::size_t>(stage)] + std::to_string(index);
}
u32 GetHash() const {
return (static_cast<u32>(stage) << 16) | index;
}
private:
static constexpr std::array<const char*, Maxwell::MaxShaderStage> BufferBaseNames = {
"buffer_vs_c", "buffer_tessc_c", "buffer_tesse_c", "buffer_gs_c", "buffer_fs_c",
};
bool is_used{};
bool is_indirect{};
unsigned index{};
unsigned max_offset{};
Maxwell::ShaderStage stage;
};
class SamplerEntry {
using Maxwell = Tegra::Engines::Maxwell3D::Regs;
public:
SamplerEntry(Maxwell::ShaderStage stage, std::size_t offset, std::size_t index,
Tegra::Shader::TextureType type, bool is_array, bool is_shadow)
: offset(offset), stage(stage), sampler_index(index), type(type), is_array(is_array),
is_shadow(is_shadow) {}
std::size_t GetOffset() const {
return offset;
}
std::size_t GetIndex() const {
return sampler_index;
}
Maxwell::ShaderStage GetStage() const {
return stage;
}
std::string GetName() const {
return std::string(TextureSamplerNames[static_cast<std::size_t>(stage)]) + '_' +
std::to_string(sampler_index);
}
std::string GetTypeString() const {
using Tegra::Shader::TextureType;
std::string glsl_type;
switch (type) {
case TextureType::Texture1D:
glsl_type = "sampler1D";
break;
case TextureType::Texture2D:
glsl_type = "sampler2D";
break;
case TextureType::Texture3D:
glsl_type = "sampler3D";
break;
case TextureType::TextureCube:
glsl_type = "samplerCube";
break;
default:
UNIMPLEMENTED();
}
if (is_array)
glsl_type += "Array";
if (is_shadow)
glsl_type += "Shadow";
return glsl_type;
}
Tegra::Shader::TextureType GetType() const {
return type;
}
bool IsArray() const {
return is_array;
}
bool IsShadow() const {
return is_shadow;
}
u32 GetHash() const {
return (static_cast<u32>(stage) << 16) | static_cast<u32>(sampler_index);
}
static std::string GetArrayName(Maxwell::ShaderStage stage) {
return TextureSamplerNames[static_cast<std::size_t>(stage)];
}
private:
static constexpr std::array<const char*, Maxwell::MaxShaderStage> TextureSamplerNames = {
"tex_vs", "tex_tessc", "tex_tesse", "tex_gs", "tex_fs",
};
/// Offset in TSC memory from which to read the sampler object, as specified by the sampling
/// instruction.
std::size_t offset;
Maxwell::ShaderStage stage; ///< Shader stage where this sampler was used.
std::size_t sampler_index; ///< Value used to index into the generated GLSL sampler array.
Tegra::Shader::TextureType type; ///< The type used to sample this texture (Texture2D, etc)
bool is_array; ///< Whether the texture is being sampled as an array texture or not.
bool is_shadow; ///< Whether the texture is being sampled as a depth texture or not.
};
struct ShaderEntries {
std::vector<ConstBufferEntry> const_buffer_entries;
std::vector<SamplerEntry> texture_samplers;
std::array<bool, Tegra::Engines::Maxwell3D::Regs::NumClipDistances> clip_distances;
std::size_t shader_length;
};
using ProgramResult = std::pair<std::string, ShaderEntries>;
using VideoCommon::Shader::ProgramCode;
struct ShaderSetup {
explicit ShaderSetup(ProgramCode program_code) {

206
src/video_core/shader/decode.cpp Normal file
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@ -0,0 +1,206 @@
// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include <set>
#include <fmt/format.h>
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/engines/shader_header.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
namespace {
/// Merges exit method of two parallel branches.
constexpr ExitMethod ParallelExit(ExitMethod a, ExitMethod b) {
if (a == ExitMethod::Undetermined) {
return b;
}
if (b == ExitMethod::Undetermined) {
return a;
}
if (a == b) {
return a;
}
return ExitMethod::Conditional;
}
/**
* Returns whether the instruction at the specified offset is a 'sched' instruction.
* Sched instructions always appear before a sequence of 3 instructions.
*/
constexpr bool IsSchedInstruction(u32 offset, u32 main_offset) {
constexpr u32 SchedPeriod = 4;
u32 absolute_offset = offset - main_offset;
return (absolute_offset % SchedPeriod) == 0;
}
} // namespace
void ShaderIR::Decode() {
std::memcpy(&header, program_code.data(), sizeof(Tegra::Shader::Header));
std::set<u32> labels;
const ExitMethod exit_method = Scan(main_offset, MAX_PROGRAM_LENGTH, labels);
if (exit_method != ExitMethod::AlwaysEnd) {
UNREACHABLE_MSG("Program does not always end");
}
if (labels.empty()) {
basic_blocks.insert({main_offset, DecodeRange(main_offset, MAX_PROGRAM_LENGTH)});
return;
}
labels.insert(main_offset);
for (const u32 label : labels) {
const auto next_it = labels.lower_bound(label + 1);
const u32 next_label = next_it == labels.end() ? MAX_PROGRAM_LENGTH : *next_it;
basic_blocks.insert({label, DecodeRange(label, next_label)});
}
}
ExitMethod ShaderIR::Scan(u32 begin, u32 end, std::set<u32>& labels) {
const auto [iter, inserted] =
exit_method_map.emplace(std::make_pair(begin, end), ExitMethod::Undetermined);
ExitMethod& exit_method = iter->second;
if (!inserted)
return exit_method;
for (u32 offset = begin; offset != end && offset != MAX_PROGRAM_LENGTH; ++offset) {
coverage_begin = std::min(coverage_begin, offset);
coverage_end = std::max(coverage_end, offset + 1);
const Instruction instr = {program_code[offset]};
const auto opcode = OpCode::Decode(instr);
if (!opcode)
continue;
switch (opcode->get().GetId()) {
case OpCode::Id::EXIT: {
// The EXIT instruction can be predicated, which means that the shader can conditionally
// end on this instruction. We have to consider the case where the condition is not met
// and check the exit method of that other basic block.
using Tegra::Shader::Pred;
if (instr.pred.pred_index == static_cast<u64>(Pred::UnusedIndex)) {
return exit_method = ExitMethod::AlwaysEnd;
} else {
const ExitMethod not_met = Scan(offset + 1, end, labels);
return exit_method = ParallelExit(ExitMethod::AlwaysEnd, not_met);
}
}
case OpCode::Id::BRA: {
const u32 target = offset + instr.bra.GetBranchTarget();
labels.insert(target);
const ExitMethod no_jmp = Scan(offset + 1, end, labels);
const ExitMethod jmp = Scan(target, end, labels);
return exit_method = ParallelExit(no_jmp, jmp);
}
case OpCode::Id::SSY:
case OpCode::Id::PBK: {
// The SSY and PBK use a similar encoding as the BRA instruction.
UNIMPLEMENTED_IF_MSG(instr.bra.constant_buffer != 0,
"Constant buffer branching is not supported");
const u32 target = offset + instr.bra.GetBranchTarget();
labels.insert(target);
// Continue scanning for an exit method.
break;
}
}
}
return exit_method = ExitMethod::AlwaysReturn;
}
BasicBlock ShaderIR::DecodeRange(u32 begin, u32 end) {
BasicBlock basic_block;
for (u32 pc = begin; pc < (begin > end ? MAX_PROGRAM_LENGTH : end);) {
pc = DecodeInstr(basic_block, pc);
}
return std::move(basic_block);
}
u32 ShaderIR::DecodeInstr(BasicBlock& bb, u32 pc) {
// Ignore sched instructions when generating code.
if (IsSchedInstruction(pc, main_offset)) {
return pc + 1;
}
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
// Decoding failure
if (!opcode) {
UNIMPLEMENTED_MSG("Unhandled instruction: {0:x}", instr.value);
return pc + 1;
}
bb.push_back(
Comment(fmt::format("{}: {} (0x{:016x})", pc, opcode->get().GetName(), instr.value)));
using Tegra::Shader::Pred;
UNIMPLEMENTED_IF_MSG(instr.pred.full_pred == Pred::NeverExecute,
"NeverExecute predicate not implemented");
static const std::map<OpCode::Type, u32 (ShaderIR::*)(BasicBlock&, const BasicBlock&, u32)>
decoders = {
{OpCode::Type::Arithmetic, &ShaderIR::DecodeArithmetic},
{OpCode::Type::ArithmeticImmediate, &ShaderIR::DecodeArithmeticImmediate},
{OpCode::Type::Bfe, &ShaderIR::DecodeBfe},
{OpCode::Type::Bfi, &ShaderIR::DecodeBfi},
{OpCode::Type::Shift, &ShaderIR::DecodeShift},
{OpCode::Type::ArithmeticInteger, &ShaderIR::DecodeArithmeticInteger},
{OpCode::Type::ArithmeticIntegerImmediate, &ShaderIR::DecodeArithmeticIntegerImmediate},
{OpCode::Type::ArithmeticHalf, &ShaderIR::DecodeArithmeticHalf},
{OpCode::Type::ArithmeticHalfImmediate, &ShaderIR::DecodeArithmeticHalfImmediate},
{OpCode::Type::Ffma, &ShaderIR::DecodeFfma},
{OpCode::Type::Hfma2, &ShaderIR::DecodeHfma2},
{OpCode::Type::Conversion, &ShaderIR::DecodeConversion},
{OpCode::Type::Memory, &ShaderIR::DecodeMemory},
{OpCode::Type::FloatSetPredicate, &ShaderIR::DecodeFloatSetPredicate},
{OpCode::Type::IntegerSetPredicate, &ShaderIR::DecodeIntegerSetPredicate},
{OpCode::Type::HalfSetPredicate, &ShaderIR::DecodeHalfSetPredicate},
{OpCode::Type::PredicateSetRegister, &ShaderIR::DecodePredicateSetRegister},
{OpCode::Type::PredicateSetPredicate, &ShaderIR::DecodePredicateSetPredicate},
{OpCode::Type::RegisterSetPredicate, &ShaderIR::DecodeRegisterSetPredicate},
{OpCode::Type::FloatSet, &ShaderIR::DecodeFloatSet},
{OpCode::Type::IntegerSet, &ShaderIR::DecodeIntegerSet},
{OpCode::Type::HalfSet, &ShaderIR::DecodeHalfSet},
{OpCode::Type::Video, &ShaderIR::DecodeVideo},
{OpCode::Type::Xmad, &ShaderIR::DecodeXmad},
};
std::vector<Node> tmp_block;
if (const auto decoder = decoders.find(opcode->get().GetType()); decoder != decoders.end()) {
pc = (this->*decoder->second)(tmp_block, bb, pc);
} else {
pc = DecodeOther(tmp_block, bb, pc);
}
// Some instructions (like SSY) don't have a predicate field, they are always unconditionally
// executed.
const bool can_be_predicated = OpCode::IsPredicatedInstruction(opcode->get().GetId());
const auto pred_index = static_cast<u32>(instr.pred.pred_index);
if (can_be_predicated && pred_index != static_cast<u32>(Pred::UnusedIndex)) {
bb.push_back(
Conditional(GetPredicate(pred_index, instr.negate_pred != 0), std::move(tmp_block)));
} else {
for (auto& node : tmp_block) {
bb.push_back(std::move(node));
}
}
return pc + 1;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::SubOp;
u32 ShaderIR::DecodeArithmetic(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
Node op_a = GetRegister(instr.gpr8);
Node op_b = [&]() -> Node {
if (instr.is_b_imm) {
return GetImmediate19(instr);
} else if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
switch (opcode->get().GetId()) {
case OpCode::Id::MOV_C:
case OpCode::Id::MOV_R: {
// MOV does not have neither 'abs' nor 'neg' bits.
SetRegister(bb, instr.gpr0, op_b);
break;
}
case OpCode::Id::FMUL_C:
case OpCode::Id::FMUL_R:
case OpCode::Id::FMUL_IMM: {
// FMUL does not have 'abs' bits and only the second operand has a 'neg' bit.
UNIMPLEMENTED_IF_MSG(instr.fmul.tab5cb8_2 != 0, "FMUL tab5cb8_2({}) is not implemented",
instr.fmul.tab5cb8_2.Value());
UNIMPLEMENTED_IF_MSG(
instr.fmul.tab5c68_0 != 1, "FMUL tab5cb8_0({}) is not implemented",
instr.fmul.tab5c68_0.Value()); // SMO typical sends 1 here which seems to be the default
op_b = GetOperandAbsNegFloat(op_b, false, instr.fmul.negate_b);
// TODO(Rodrigo): Should precise be used when there's a postfactor?
Node value = Operation(OperationCode::FMul, PRECISE, op_a, op_b);
if (instr.fmul.postfactor != 0) {
auto postfactor = static_cast<s32>(instr.fmul.postfactor);
// Postfactor encoded as 3-bit 1's complement in instruction, interpreted with below
// logic.
if (postfactor >= 4) {
postfactor = 7 - postfactor;
} else {
postfactor = 0 - postfactor;
}
if (postfactor > 0) {
value = Operation(OperationCode::FMul, NO_PRECISE, value,
Immediate(static_cast<f32>(1 << postfactor)));
} else {
value = Operation(OperationCode::FDiv, NO_PRECISE, value,
Immediate(static_cast<f32>(1 << -postfactor)));
}
}
value = GetSaturatedFloat(value, instr.alu.saturate_d);
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::FADD_C:
case OpCode::Id::FADD_R:
case OpCode::Id::FADD_IMM: {
op_a = GetOperandAbsNegFloat(op_a, instr.alu.abs_a, instr.alu.negate_a);
op_b = GetOperandAbsNegFloat(op_b, instr.alu.abs_b, instr.alu.negate_b);
Node value = Operation(OperationCode::FAdd, PRECISE, op_a, op_b);
value = GetSaturatedFloat(value, instr.alu.saturate_d);
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::MUFU: {
op_a = GetOperandAbsNegFloat(op_a, instr.alu.abs_a, instr.alu.negate_a);
Node value = [&]() {
switch (instr.sub_op) {
case SubOp::Cos:
return Operation(OperationCode::FCos, PRECISE, op_a);
case SubOp::Sin:
return Operation(OperationCode::FSin, PRECISE, op_a);
case SubOp::Ex2:
return Operation(OperationCode::FExp2, PRECISE, op_a);
case SubOp::Lg2:
return Operation(OperationCode::FLog2, PRECISE, op_a);
case SubOp::Rcp:
return Operation(OperationCode::FDiv, PRECISE, Immediate(1.0f), op_a);
case SubOp::Rsq:
return Operation(OperationCode::FInverseSqrt, PRECISE, op_a);
case SubOp::Sqrt:
return Operation(OperationCode::FSqrt, PRECISE, op_a);
default:
UNIMPLEMENTED_MSG("Unhandled MUFU sub op={0:x}",
static_cast<unsigned>(instr.sub_op.Value()));
return Immediate(0);
}
}();
value = GetSaturatedFloat(value, instr.alu.saturate_d);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::FMNMX_C:
case OpCode::Id::FMNMX_R:
case OpCode::Id::FMNMX_IMM: {
op_a = GetOperandAbsNegFloat(op_a, instr.alu.abs_a, instr.alu.negate_a);
op_b = GetOperandAbsNegFloat(op_b, instr.alu.abs_b, instr.alu.negate_b);
const Node condition = GetPredicate(instr.alu.fmnmx.pred, instr.alu.fmnmx.negate_pred != 0);
const Node min = Operation(OperationCode::FMin, NO_PRECISE, op_a, op_b);
const Node max = Operation(OperationCode::FMax, NO_PRECISE, op_a, op_b);
const Node value = Operation(OperationCode::Select, NO_PRECISE, condition, min, max);
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::RRO_C:
case OpCode::Id::RRO_R:
case OpCode::Id::RRO_IMM: {
// Currently RRO is only implemented as a register move.
op_b = GetOperandAbsNegFloat(op_b, instr.alu.abs_b, instr.alu.negate_b);
SetRegister(bb, instr.gpr0, op_b);
LOG_WARNING(HW_GPU, "RRO instruction is incomplete");
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled arithmetic instruction: {}", opcode->get().GetName());
}
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeArithmeticHalf(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
if (opcode->get().GetId() == OpCode::Id::HADD2_C ||
opcode->get().GetId() == OpCode::Id::HADD2_R) {
UNIMPLEMENTED_IF(instr.alu_half.ftz != 0);
}
UNIMPLEMENTED_IF_MSG(instr.alu_half.saturate != 0, "Half float saturation not implemented");
const bool negate_a =
opcode->get().GetId() != OpCode::Id::HMUL2_R && instr.alu_half.negate_a != 0;
const bool negate_b =
opcode->get().GetId() != OpCode::Id::HMUL2_C && instr.alu_half.negate_b != 0;
const Node op_a = GetOperandAbsNegHalf(GetRegister(instr.gpr8), instr.alu_half.abs_a, negate_a);
// instr.alu_half.type_a
Node op_b = [&]() {
switch (opcode->get().GetId()) {
case OpCode::Id::HADD2_C:
case OpCode::Id::HMUL2_C:
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
case OpCode::Id::HADD2_R:
case OpCode::Id::HMUL2_R:
return GetRegister(instr.gpr20);
default:
UNREACHABLE();
return Immediate(0);
}
}();
op_b = GetOperandAbsNegHalf(op_b, instr.alu_half.abs_b, negate_b);
Node value = [&]() {
MetaHalfArithmetic meta{true, {instr.alu_half_imm.type_a, instr.alu_half.type_b}};
switch (opcode->get().GetId()) {
case OpCode::Id::HADD2_C:
case OpCode::Id::HADD2_R:
return Operation(OperationCode::HAdd, meta, op_a, op_b);
case OpCode::Id::HMUL2_C:
case OpCode::Id::HMUL2_R:
return Operation(OperationCode::HMul, meta, op_a, op_b);
default:
UNIMPLEMENTED_MSG("Unhandled half float instruction: {}", opcode->get().GetName());
return Immediate(0);
}
}();
value = HalfMerge(GetRegister(instr.gpr0), value, instr.alu_half.merge);
SetRegister(bb, instr.gpr0, value);
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeArithmeticHalfImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
if (opcode->get().GetId() == OpCode::Id::HADD2_IMM) {
UNIMPLEMENTED_IF(instr.alu_half_imm.ftz != 0);
} else {
UNIMPLEMENTED_IF(instr.alu_half_imm.precision != Tegra::Shader::HalfPrecision::None);
}
UNIMPLEMENTED_IF_MSG(instr.alu_half_imm.saturate != 0,
"Half float immediate saturation not implemented");
Node op_a = GetRegister(instr.gpr8);
op_a = GetOperandAbsNegHalf(op_a, instr.alu_half_imm.abs_a, instr.alu_half_imm.negate_a);
const Node op_b = UnpackHalfImmediate(instr, true);
Node value = [&]() {
MetaHalfArithmetic meta{true, {instr.alu_half_imm.type_a}};
switch (opcode->get().GetId()) {
case OpCode::Id::HADD2_IMM:
return Operation(OperationCode::HAdd, meta, op_a, op_b);
case OpCode::Id::HMUL2_IMM:
return Operation(OperationCode::HMul, meta, op_a, op_b);
default:
UNREACHABLE();
return Immediate(0);
}
}();
value = HalfMerge(GetRegister(instr.gpr0), value, instr.alu_half_imm.merge);
SetRegister(bb, instr.gpr0, value);
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeArithmeticImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
switch (opcode->get().GetId()) {
case OpCode::Id::MOV32_IMM: {
SetRegister(bb, instr.gpr0, GetImmediate32(instr));
break;
}
case OpCode::Id::FMUL32_IMM: {
Node value =
Operation(OperationCode::FMul, PRECISE, GetRegister(instr.gpr8), GetImmediate32(instr));
value = GetSaturatedFloat(value, instr.fmul32.saturate);
SetInternalFlagsFromFloat(bb, value, instr.op_32.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::FADD32I: {
const Node op_a = GetOperandAbsNegFloat(GetRegister(instr.gpr8), instr.fadd32i.abs_a,
instr.fadd32i.negate_a);
const Node op_b = GetOperandAbsNegFloat(GetImmediate32(instr), instr.fadd32i.abs_b,
instr.fadd32i.negate_b);
const Node value = Operation(OperationCode::FAdd, PRECISE, op_a, op_b);
SetInternalFlagsFromFloat(bb, value, instr.op_32.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled arithmetic immediate instruction: {}",
opcode->get().GetName());
}
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::IAdd3Height;
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Pred;
using Tegra::Shader::Register;
u32 ShaderIR::DecodeArithmeticInteger(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
Node op_a = GetRegister(instr.gpr8);
Node op_b = [&]() {
if (instr.is_b_imm) {
return Immediate(instr.alu.GetSignedImm20_20());
} else if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
switch (opcode->get().GetId()) {
case OpCode::Id::IADD_C:
case OpCode::Id::IADD_R:
case OpCode::Id::IADD_IMM: {
UNIMPLEMENTED_IF_MSG(instr.alu.saturate_d, "IADD saturation not implemented");
op_a = GetOperandAbsNegInteger(op_a, false, instr.alu_integer.negate_a, true);
op_b = GetOperandAbsNegInteger(op_b, false, instr.alu_integer.negate_b, true);
const Node value = Operation(OperationCode::IAdd, PRECISE, op_a, op_b);
SetInternalFlagsFromInteger(bb, value, instr.op_32.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::IADD3_C:
case OpCode::Id::IADD3_R:
case OpCode::Id::IADD3_IMM: {
Node op_c = GetRegister(instr.gpr39);
const auto ApplyHeight = [&](IAdd3Height height, Node value) {
switch (height) {
case IAdd3Height::None:
return value;
case IAdd3Height::LowerHalfWord:
return BitfieldExtract(value, 0, 16);
case IAdd3Height::UpperHalfWord:
return BitfieldExtract(value, 16, 16);
default:
UNIMPLEMENTED_MSG("Unhandled IADD3 height: {}", static_cast<u32>(height));
return Immediate(0);
}
};
if (opcode->get().GetId() == OpCode::Id::IADD3_R) {
op_a = ApplyHeight(instr.iadd3.height_a, op_a);
op_b = ApplyHeight(instr.iadd3.height_b, op_b);
op_c = ApplyHeight(instr.iadd3.height_c, op_c);
}
op_a = GetOperandAbsNegInteger(op_a, false, instr.iadd3.neg_a, true);
op_b = GetOperandAbsNegInteger(op_b, false, instr.iadd3.neg_b, true);
op_c = GetOperandAbsNegInteger(op_c, false, instr.iadd3.neg_c, true);
const Node value = [&]() {
const Node add_ab = Operation(OperationCode::IAdd, NO_PRECISE, op_a, op_b);
if (opcode->get().GetId() != OpCode::Id::IADD3_R) {
return Operation(OperationCode::IAdd, NO_PRECISE, add_ab, op_c);
}
const Node shifted = [&]() {
switch (instr.iadd3.mode) {
case Tegra::Shader::IAdd3Mode::RightShift:
// TODO(tech4me): According to
// https://envytools.readthedocs.io/en/latest/hw/graph/maxwell/cuda/int.html?highlight=iadd3
// The addition between op_a and op_b should be done in uint33, more
// investigation required
return Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, add_ab,
Immediate(16));
case Tegra::Shader::IAdd3Mode::LeftShift:
return Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, add_ab,
Immediate(16));
default:
return add_ab;
}
}();
return Operation(OperationCode::IAdd, NO_PRECISE, shifted, op_c);
}();
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::ISCADD_C:
case OpCode::Id::ISCADD_R:
case OpCode::Id::ISCADD_IMM: {
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in ISCADD is not implemented");
op_a = GetOperandAbsNegInteger(op_a, false, instr.alu_integer.negate_a, true);
op_b = GetOperandAbsNegInteger(op_b, false, instr.alu_integer.negate_b, true);
const Node shift = Immediate(static_cast<u32>(instr.alu_integer.shift_amount));
const Node shifted_a = Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, op_a, shift);
const Node value = Operation(OperationCode::IAdd, NO_PRECISE, shifted_a, op_b);
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::POPC_C:
case OpCode::Id::POPC_R:
case OpCode::Id::POPC_IMM: {
if (instr.popc.invert) {
op_b = Operation(OperationCode::IBitwiseNot, NO_PRECISE, op_b);
}
const Node value = Operation(OperationCode::IBitCount, PRECISE, op_b);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::SEL_C:
case OpCode::Id::SEL_R:
case OpCode::Id::SEL_IMM: {
const Node condition = GetPredicate(instr.sel.pred, instr.sel.neg_pred != 0);
const Node value = Operation(OperationCode::Select, PRECISE, condition, op_a, op_b);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::LOP_C:
case OpCode::Id::LOP_R:
case OpCode::Id::LOP_IMM: {
if (instr.alu.lop.invert_a)
op_a = Operation(OperationCode::IBitwiseNot, NO_PRECISE, op_a);
if (instr.alu.lop.invert_b)
op_b = Operation(OperationCode::IBitwiseNot, NO_PRECISE, op_b);
WriteLogicOperation(bb, instr.gpr0, instr.alu.lop.operation, op_a, op_b,
instr.alu.lop.pred_result_mode, instr.alu.lop.pred48,
instr.generates_cc);
break;
}
case OpCode::Id::LOP3_C:
case OpCode::Id::LOP3_R:
case OpCode::Id::LOP3_IMM: {
const Node op_c = GetRegister(instr.gpr39);
const Node lut = [&]() {
if (opcode->get().GetId() == OpCode::Id::LOP3_R) {
return Immediate(instr.alu.lop3.GetImmLut28());
} else {
return Immediate(instr.alu.lop3.GetImmLut48());
}
}();
WriteLop3Instruction(bb, instr.gpr0, op_a, op_b, op_c, lut, instr.generates_cc);
break;
}
case OpCode::Id::IMNMX_C:
case OpCode::Id::IMNMX_R:
case OpCode::Id::IMNMX_IMM: {
UNIMPLEMENTED_IF(instr.imnmx.exchange != Tegra::Shader::IMinMaxExchange::None);
const bool is_signed = instr.imnmx.is_signed;
const Node condition = GetPredicate(instr.imnmx.pred, instr.imnmx.negate_pred != 0);
const Node min = SignedOperation(OperationCode::IMin, is_signed, NO_PRECISE, op_a, op_b);
const Node max = SignedOperation(OperationCode::IMax, is_signed, NO_PRECISE, op_a, op_b);
const Node value = Operation(OperationCode::Select, NO_PRECISE, condition, min, max);
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::LEA_R2:
case OpCode::Id::LEA_R1:
case OpCode::Id::LEA_IMM:
case OpCode::Id::LEA_RZ:
case OpCode::Id::LEA_HI: {
const auto [op_a, op_b, op_c] = [&]() -> std::tuple<Node, Node, Node> {
switch (opcode->get().GetId()) {
case OpCode::Id::LEA_R2: {
return {GetRegister(instr.gpr20), GetRegister(instr.gpr39),
Immediate(static_cast<u32>(instr.lea.r2.entry_a))};
}
case OpCode::Id::LEA_R1: {
const bool neg = instr.lea.r1.neg != 0;
return {GetOperandAbsNegInteger(GetRegister(instr.gpr8), false, neg, true),
GetRegister(instr.gpr20),
Immediate(static_cast<u32>(instr.lea.r1.entry_a))};
}
case OpCode::Id::LEA_IMM: {
const bool neg = instr.lea.imm.neg != 0;
return {Immediate(static_cast<u32>(instr.lea.imm.entry_a)),
GetOperandAbsNegInteger(GetRegister(instr.gpr8), false, neg, true),
Immediate(static_cast<u32>(instr.lea.imm.entry_b))};
}
case OpCode::Id::LEA_RZ: {
const bool neg = instr.lea.rz.neg != 0;
return {GetConstBuffer(instr.lea.rz.cb_index, instr.lea.rz.cb_offset),
GetOperandAbsNegInteger(GetRegister(instr.gpr8), false, neg, true),
Immediate(static_cast<u32>(instr.lea.rz.entry_a))};
}
case OpCode::Id::LEA_HI:
default:
UNIMPLEMENTED_MSG("Unhandled LEA subinstruction: {}", opcode->get().GetName());
return {Immediate(static_cast<u32>(instr.lea.imm.entry_a)), GetRegister(instr.gpr8),
Immediate(static_cast<u32>(instr.lea.imm.entry_b))};
}
}();
UNIMPLEMENTED_IF_MSG(instr.lea.pred48 != static_cast<u64>(Pred::UnusedIndex),
"Unhandled LEA Predicate");
const Node shifted_c =
Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, Immediate(1), op_c);
const Node mul_bc = Operation(OperationCode::IMul, NO_PRECISE, op_b, shifted_c);
const Node value = Operation(OperationCode::IAdd, NO_PRECISE, op_a, mul_bc);
SetRegister(bb, instr.gpr0, value);
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled ArithmeticInteger instruction: {}", opcode->get().GetName());
}
return pc;
}
void ShaderIR::WriteLop3Instruction(BasicBlock& bb, Register dest, Node op_a, Node op_b, Node op_c,
Node imm_lut, bool sets_cc) {
constexpr u32 lop_iterations = 32;
const Node one = Immediate(1);
const Node two = Immediate(2);
Node value{};
for (u32 i = 0; i < lop_iterations; ++i) {
const Node shift_amount = Immediate(i);
const Node a = Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, op_c, shift_amount);
const Node pack_0 = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, a, one);
const Node b = Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, op_b, shift_amount);
const Node c = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, b, one);
const Node pack_1 = Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, c, one);
const Node d = Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, op_a, shift_amount);
const Node e = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, d, one);
const Node pack_2 = Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, e, two);
const Node pack_01 = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, pack_0, pack_1);
const Node pack_012 = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, pack_01, pack_2);
const Node shifted_bit =
Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, imm_lut, pack_012);
const Node bit = Operation(OperationCode::IBitwiseAnd, NO_PRECISE, shifted_bit, one);
const Node right =
Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, bit, shift_amount);
if (i > 0) {
value = Operation(OperationCode::IBitwiseOr, NO_PRECISE, value, right);
} else {
value = right;
}
}
SetInternalFlagsFromInteger(bb, value, sets_cc);
SetRegister(bb, dest, value);
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::LogicOperation;
using Tegra::Shader::OpCode;
using Tegra::Shader::Pred;
using Tegra::Shader::PredicateResultMode;
using Tegra::Shader::Register;
u32 ShaderIR::DecodeArithmeticIntegerImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
Node op_a = GetRegister(instr.gpr8);
Node op_b = Immediate(static_cast<s32>(instr.alu.imm20_32));
switch (opcode->get().GetId()) {
case OpCode::Id::IADD32I: {
UNIMPLEMENTED_IF_MSG(instr.iadd32i.saturate, "IADD32I saturation is not implemented");
op_a = GetOperandAbsNegInteger(op_a, false, instr.iadd32i.negate_a, true);
const Node value = Operation(OperationCode::IAdd, PRECISE, op_a, op_b);
SetInternalFlagsFromInteger(bb, value, instr.op_32.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::LOP32I: {
if (instr.alu.lop32i.invert_a)
op_a = Operation(OperationCode::IBitwiseNot, NO_PRECISE, op_a);
if (instr.alu.lop32i.invert_b)
op_b = Operation(OperationCode::IBitwiseNot, NO_PRECISE, op_b);
WriteLogicOperation(bb, instr.gpr0, instr.alu.lop32i.operation, op_a, op_b,
PredicateResultMode::None, Pred::UnusedIndex, instr.op_32.generates_cc);
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled ArithmeticIntegerImmediate instruction: {}",
opcode->get().GetName());
}
return pc;
}
void ShaderIR::WriteLogicOperation(BasicBlock& bb, Register dest, LogicOperation logic_op,
Node op_a, Node op_b, PredicateResultMode predicate_mode,
Pred predicate, bool sets_cc) {
const Node result = [&]() {
switch (logic_op) {
case LogicOperation::And:
return Operation(OperationCode::IBitwiseAnd, PRECISE, op_a, op_b);
case LogicOperation::Or:
return Operation(OperationCode::IBitwiseOr, PRECISE, op_a, op_b);
case LogicOperation::Xor:
return Operation(OperationCode::IBitwiseXor, PRECISE, op_a, op_b);
case LogicOperation::PassB:
return op_b;
default:
UNIMPLEMENTED_MSG("Unimplemented logic operation={}", static_cast<u32>(logic_op));
return Immediate(0);
}
}();
SetInternalFlagsFromInteger(bb, result, sets_cc);
SetRegister(bb, dest, result);
// Write the predicate value depending on the predicate mode.
switch (predicate_mode) {
case PredicateResultMode::None:
// Do nothing.
return;
case PredicateResultMode::NotZero: {
// Set the predicate to true if the result is not zero.
const Node compare = Operation(OperationCode::LogicalINotEqual, result, Immediate(0));
SetPredicate(bb, static_cast<u64>(predicate), compare);
break;
}
default:
UNIMPLEMENTED_MSG("Unimplemented predicate result mode: {}",
static_cast<u32>(predicate_mode));
}
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeBfe(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED_IF(instr.bfe.negate_b);
Node op_a = GetRegister(instr.gpr8);
op_a = GetOperandAbsNegInteger(op_a, false, instr.bfe.negate_a, false);
switch (opcode->get().GetId()) {
case OpCode::Id::BFE_IMM: {
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in BFE is not implemented");
const Node inner_shift_imm = Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue()));
const Node outer_shift_imm =
Immediate(static_cast<u32>(instr.bfe.GetLeftShiftValue() + instr.bfe.shift_position));
const Node inner_shift =
Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, op_a, inner_shift_imm);
const Node outer_shift =
Operation(OperationCode::ILogicalShiftRight, NO_PRECISE, inner_shift, outer_shift_imm);
SetInternalFlagsFromInteger(bb, outer_shift, instr.generates_cc);
SetRegister(bb, instr.gpr0, outer_shift);
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled BFE instruction: {}", opcode->get().GetName());
}
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeBfi(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
const auto [base, packed_shift] = [&]() -> std::tuple<Node, Node> {
switch (opcode->get().GetId()) {
case OpCode::Id::BFI_IMM_R:
return {GetRegister(instr.gpr39), Immediate(instr.alu.GetSignedImm20_20())};
default:
UNREACHABLE();
return {Immediate(0), Immediate(0)};
}
}();
const Node insert = GetRegister(instr.gpr8);
const Node offset = BitfieldExtract(packed_shift, 0, 8);
const Node bits = BitfieldExtract(packed_shift, 8, 8);
const Node value =
Operation(OperationCode::UBitfieldInsert, PRECISE, base, insert, offset, bits);
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Register;
u32 ShaderIR::DecodeConversion(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
switch (opcode->get().GetId()) {
case OpCode::Id::I2I_R: {
UNIMPLEMENTED_IF(instr.conversion.selector);
const bool input_signed = instr.conversion.is_input_signed;
const bool output_signed = instr.conversion.is_output_signed;
Node value = GetRegister(instr.gpr20);
value = ConvertIntegerSize(value, instr.conversion.src_size, input_signed);
value = GetOperandAbsNegInteger(value, instr.conversion.abs_a, instr.conversion.negate_a,
input_signed);
if (input_signed != output_signed) {
value = SignedOperation(OperationCode::ICastUnsigned, output_signed, NO_PRECISE, value);
}
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::I2F_R:
case OpCode::Id::I2F_C: {
UNIMPLEMENTED_IF(instr.conversion.dest_size != Register::Size::Word);
UNIMPLEMENTED_IF(instr.conversion.selector);
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in I2F is not implemented");
Node value = [&]() {
if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
const bool input_signed = instr.conversion.is_input_signed;
value = ConvertIntegerSize(value, instr.conversion.src_size, input_signed);
value = GetOperandAbsNegInteger(value, instr.conversion.abs_a, false, input_signed);
value = SignedOperation(OperationCode::FCastInteger, input_signed, PRECISE, value);
value = GetOperandAbsNegFloat(value, false, instr.conversion.negate_a);
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::F2F_R:
case OpCode::Id::F2F_C: {
UNIMPLEMENTED_IF(instr.conversion.dest_size != Register::Size::Word);
UNIMPLEMENTED_IF(instr.conversion.src_size != Register::Size::Word);
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in F2F is not implemented");
Node value = [&]() {
if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
value = GetOperandAbsNegFloat(value, instr.conversion.abs_a, instr.conversion.negate_a);
value = [&]() {
switch (instr.conversion.f2f.rounding) {
case Tegra::Shader::F2fRoundingOp::None:
return value;
case Tegra::Shader::F2fRoundingOp::Round:
return Operation(OperationCode::FRoundEven, PRECISE, value);
case Tegra::Shader::F2fRoundingOp::Floor:
return Operation(OperationCode::FFloor, PRECISE, value);
case Tegra::Shader::F2fRoundingOp::Ceil:
return Operation(OperationCode::FCeil, PRECISE, value);
case Tegra::Shader::F2fRoundingOp::Trunc:
return Operation(OperationCode::FTrunc, PRECISE, value);
}
UNIMPLEMENTED_MSG("Unimplemented F2F rounding mode {}",
static_cast<u32>(instr.conversion.f2f.rounding.Value()));
return Immediate(0);
}();
value = GetSaturatedFloat(value, instr.alu.saturate_d);
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::F2I_R:
case OpCode::Id::F2I_C: {
UNIMPLEMENTED_IF(instr.conversion.src_size != Register::Size::Word);
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in F2I is not implemented");
Node value = [&]() {
if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
value = GetOperandAbsNegFloat(value, instr.conversion.abs_a, instr.conversion.negate_a);
value = [&]() {
switch (instr.conversion.f2i.rounding) {
case Tegra::Shader::F2iRoundingOp::None:
return value;
case Tegra::Shader::F2iRoundingOp::Floor:
return Operation(OperationCode::FFloor, PRECISE, value);
case Tegra::Shader::F2iRoundingOp::Ceil:
return Operation(OperationCode::FCeil, PRECISE, value);
case Tegra::Shader::F2iRoundingOp::Trunc:
return Operation(OperationCode::FTrunc, PRECISE, value);
default:
UNIMPLEMENTED_MSG("Unimplemented F2I rounding mode {}",
static_cast<u32>(instr.conversion.f2i.rounding.Value()));
return Immediate(0);
}
}();
const bool is_signed = instr.conversion.is_output_signed;
value = SignedOperation(OperationCode::ICastFloat, is_signed, PRECISE, value);
value = ConvertIntegerSize(value, instr.conversion.dest_size, is_signed);
SetRegister(bb, instr.gpr0, value);
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled conversion instruction: {}", opcode->get().GetName());
}
return pc;
}
} // namespace VideoCommon::Shader

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src/video_core/shader/decode/decode_integer_set.cpp Normal file
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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeFfma(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED_IF_MSG(instr.ffma.cc != 0, "FFMA cc not implemented");
UNIMPLEMENTED_IF_MSG(instr.ffma.tab5980_0 != 1, "FFMA tab5980_0({}) not implemented",
instr.ffma.tab5980_0.Value()); // Seems to be 1 by default based on SMO
UNIMPLEMENTED_IF_MSG(instr.ffma.tab5980_1 != 0, "FFMA tab5980_1({}) not implemented",
instr.ffma.tab5980_1.Value());
const Node op_a = GetRegister(instr.gpr8);
auto [op_b, op_c] = [&]() -> std::tuple<Node, Node> {
switch (opcode->get().GetId()) {
case OpCode::Id::FFMA_CR: {
return {GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset),
GetRegister(instr.gpr39)};
}
case OpCode::Id::FFMA_RR:
return {GetRegister(instr.gpr20), GetRegister(instr.gpr39)};
case OpCode::Id::FFMA_RC: {
return {GetRegister(instr.gpr39),
GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset)};
}
case OpCode::Id::FFMA_IMM:
return {GetImmediate19(instr), GetRegister(instr.gpr39)};
default:
UNIMPLEMENTED_MSG("Unhandled FFMA instruction: {}", opcode->get().GetName());
return {Immediate(0), Immediate(0)};
}
}();
op_b = GetOperandAbsNegFloat(op_b, false, instr.ffma.negate_b);
op_c = GetOperandAbsNegFloat(op_c, false, instr.ffma.negate_c);
Node value = Operation(OperationCode::FFma, PRECISE, op_a, op_b, op_c);
value = GetSaturatedFloat(value, instr.alu.saturate_d);
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeFloatSet(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
const Node op_a = GetOperandAbsNegFloat(GetRegister(instr.gpr8), instr.fset.abs_a != 0,
instr.fset.neg_a != 0);
Node op_b = [&]() {
if (instr.is_b_imm) {
return GetImmediate19(instr);
} else if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
op_b = GetOperandAbsNegFloat(op_b, instr.fset.abs_b != 0, instr.fset.neg_b != 0);
// The fset instruction sets a register to 1.0 or -1 (depending on the bf bit) if the
// condition is true, and to 0 otherwise.
const Node second_pred = GetPredicate(instr.fset.pred39, instr.fset.neg_pred != 0);
const OperationCode combiner = GetPredicateCombiner(instr.fset.op);
const Node first_pred = GetPredicateComparisonFloat(instr.fset.cond, op_a, op_b);
const Node predicate = Operation(combiner, first_pred, second_pred);
const Node true_value = instr.fset.bf ? Immediate(1.0f) : Immediate(-1);
const Node false_value = instr.fset.bf ? Immediate(0.0f) : Immediate(0);
const Node value =
Operation(OperationCode::Select, PRECISE, predicate, true_value, false_value);
if (instr.fset.bf) {
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
} else {
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
}
SetRegister(bb, instr.gpr0, value);
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Pred;
u32 ShaderIR::DecodeFloatSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
const Node op_a = GetOperandAbsNegFloat(GetRegister(instr.gpr8), instr.fsetp.abs_a != 0,
instr.fsetp.neg_a != 0);
Node op_b = [&]() {
if (instr.is_b_imm) {
return GetImmediate19(instr);
} else if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
op_b = GetOperandAbsNegFloat(op_b, instr.fsetp.abs_b, false);
// We can't use the constant predicate as destination.
ASSERT(instr.fsetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
const Node predicate = GetPredicateComparisonFloat(instr.fsetp.cond, op_a, op_b);
const Node second_pred = GetPredicate(instr.fsetp.pred39, instr.fsetp.neg_pred != 0);
const OperationCode combiner = GetPredicateCombiner(instr.fsetp.op);
const Node value = Operation(combiner, predicate, second_pred);
// Set the primary predicate to the result of Predicate OP SecondPredicate
SetPredicate(bb, instr.fsetp.pred3, value);
if (instr.fsetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
// Set the secondary predicate to the result of !Predicate OP SecondPredicate,
// if enabled
const Node negated_pred = Operation(OperationCode::LogicalNegate, predicate);
const Node second_value = Operation(combiner, negated_pred, second_pred);
SetPredicate(bb, instr.fsetp.pred0, second_value);
}
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <array>
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeHalfSet(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED_IF(instr.hset2.ftz != 0);
// instr.hset2.type_a
// instr.hset2.type_b
Node op_a = GetRegister(instr.gpr8);
Node op_b = [&]() {
switch (opcode->get().GetId()) {
case OpCode::Id::HSET2_R:
return GetRegister(instr.gpr20);
default:
UNREACHABLE();
return Immediate(0);
}
}();
op_a = GetOperandAbsNegHalf(op_a, instr.hset2.abs_a, instr.hset2.negate_a);
op_b = GetOperandAbsNegHalf(op_b, instr.hset2.abs_b, instr.hset2.negate_b);
const Node second_pred = GetPredicate(instr.hset2.pred39, instr.hset2.neg_pred);
MetaHalfArithmetic meta{false, {instr.hset2.type_a, instr.hset2.type_b}};
const Node comparison_pair = GetPredicateComparisonHalf(instr.hset2.cond, meta, op_a, op_b);
const OperationCode combiner = GetPredicateCombiner(instr.hset2.op);
// HSET2 operates on each half float in the pack.
std::array<Node, 2> values;
for (u32 i = 0; i < 2; ++i) {
const u32 raw_value = instr.hset2.bf ? 0x3c00 : 0xffff;
const Node true_value = Immediate(raw_value << (i * 16));
const Node false_value = Immediate(0);
const Node comparison =
Operation(OperationCode::LogicalPick2, comparison_pair, Immediate(i));
const Node predicate = Operation(combiner, comparison, second_pred);
values[i] =
Operation(OperationCode::Select, NO_PRECISE, predicate, true_value, false_value);
}
const Node value = Operation(OperationCode::UBitwiseOr, NO_PRECISE, values[0], values[1]);
SetRegister(bb, instr.gpr0, value);
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Pred;
u32 ShaderIR::DecodeHalfSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED_IF(instr.hsetp2.ftz != 0);
Node op_a = GetRegister(instr.gpr8);
op_a = GetOperandAbsNegHalf(op_a, instr.hsetp2.abs_a, instr.hsetp2.negate_a);
const Node op_b = [&]() {
switch (opcode->get().GetId()) {
case OpCode::Id::HSETP2_R:
return GetOperandAbsNegHalf(GetRegister(instr.gpr20), instr.hsetp2.abs_a,
instr.hsetp2.negate_b);
default:
UNREACHABLE();
return Immediate(0);
}
}();
// We can't use the constant predicate as destination.
ASSERT(instr.hsetp2.pred3 != static_cast<u64>(Pred::UnusedIndex));
const Node second_pred = GetPredicate(instr.hsetp2.pred39, instr.hsetp2.neg_pred != 0);
const OperationCode combiner = GetPredicateCombiner(instr.hsetp2.op);
const OperationCode pair_combiner =
instr.hsetp2.h_and ? OperationCode::LogicalAll2 : OperationCode::LogicalAny2;
MetaHalfArithmetic meta = {false, {instr.hsetp2.type_a, instr.hsetp2.type_b}};
const Node comparison = GetPredicateComparisonHalf(instr.hsetp2.cond, meta, op_a, op_b);
const Node first_pred = Operation(pair_combiner, comparison);
// Set the primary predicate to the result of Predicate OP SecondPredicate
const Node value = Operation(combiner, first_pred, second_pred);
SetPredicate(bb, instr.hsetp2.pred3, value);
if (instr.hsetp2.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
// Set the secondary predicate to the result of !Predicate OP SecondPredicate, if enabled
const Node negated_pred = Operation(OperationCode::LogicalNegate, first_pred);
SetPredicate(bb, instr.hsetp2.pred0, Operation(combiner, negated_pred, second_pred));
}
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <tuple>
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::HalfPrecision;
using Tegra::Shader::HalfType;
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeHfma2(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
if (opcode->get().GetId() == OpCode::Id::HFMA2_RR) {
UNIMPLEMENTED_IF(instr.hfma2.rr.precision != HalfPrecision::None);
} else {
UNIMPLEMENTED_IF(instr.hfma2.precision != HalfPrecision::None);
}
constexpr auto identity = HalfType::H0_H1;
const HalfType type_a = instr.hfma2.type_a;
const Node op_a = GetRegister(instr.gpr8);
bool neg_b{}, neg_c{};
auto [saturate, type_b, op_b, type_c,
op_c] = [&]() -> std::tuple<bool, HalfType, Node, HalfType, Node> {
switch (opcode->get().GetId()) {
case OpCode::Id::HFMA2_CR:
neg_b = instr.hfma2.negate_b;
neg_c = instr.hfma2.negate_c;
return {instr.hfma2.saturate, instr.hfma2.type_b,
GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset), instr.hfma2.type_reg39,
GetRegister(instr.gpr39)};
case OpCode::Id::HFMA2_RC:
neg_b = instr.hfma2.negate_b;
neg_c = instr.hfma2.negate_c;
return {instr.hfma2.saturate, instr.hfma2.type_reg39, GetRegister(instr.gpr39),
instr.hfma2.type_b, GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset)};
case OpCode::Id::HFMA2_RR:
neg_b = instr.hfma2.rr.negate_b;
neg_c = instr.hfma2.rr.negate_c;
return {instr.hfma2.rr.saturate, instr.hfma2.type_b, GetRegister(instr.gpr20),
instr.hfma2.rr.type_c, GetRegister(instr.gpr39)};
case OpCode::Id::HFMA2_IMM_R:
neg_c = instr.hfma2.negate_c;
return {instr.hfma2.saturate, identity, UnpackHalfImmediate(instr, true),
instr.hfma2.type_reg39, GetRegister(instr.gpr39)};
default:
return {false, identity, Immediate(0), identity, Immediate(0)};
}
}();
UNIMPLEMENTED_IF_MSG(saturate, "HFMA2 saturation is not implemented");
op_b = GetOperandAbsNegHalf(op_b, false, neg_b);
op_c = GetOperandAbsNegHalf(op_c, false, neg_c);
MetaHalfArithmetic meta{true, {type_a, type_b, type_c}};
Node value = Operation(OperationCode::HFma, meta, op_a, op_b, op_c);
value = HalfMerge(GetRegister(instr.gpr0), value, instr.hfma2.merge);
SetRegister(bb, instr.gpr0, value);
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeIntegerSet(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
const Node op_a = GetRegister(instr.gpr8);
const Node op_b = [&]() {
if (instr.is_b_imm) {
return Immediate(instr.alu.GetSignedImm20_20());
} else if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
// The iset instruction sets a register to 1.0 or -1 (depending on the bf bit) if the condition
// is true, and to 0 otherwise.
const Node second_pred = GetPredicate(instr.iset.pred39, instr.iset.neg_pred != 0);
const Node first_pred =
GetPredicateComparisonInteger(instr.iset.cond, instr.iset.is_signed, op_a, op_b);
const OperationCode combiner = GetPredicateCombiner(instr.iset.op);
const Node predicate = Operation(combiner, first_pred, second_pred);
const Node true_value = instr.iset.bf ? Immediate(1.0f) : Immediate(-1);
const Node false_value = instr.iset.bf ? Immediate(0.0f) : Immediate(0);
const Node value =
Operation(OperationCode::Select, PRECISE, predicate, true_value, false_value);
SetRegister(bb, instr.gpr0, value);
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Pred;
u32 ShaderIR::DecodeIntegerSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
const Node op_a = GetRegister(instr.gpr8);
const Node op_b = [&]() {
if (instr.is_b_imm) {
return Immediate(instr.alu.GetSignedImm20_20());
} else if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
// We can't use the constant predicate as destination.
ASSERT(instr.isetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
const Node second_pred = GetPredicate(instr.isetp.pred39, instr.isetp.neg_pred != 0);
const Node predicate =
GetPredicateComparisonInteger(instr.isetp.cond, instr.isetp.is_signed, op_a, op_b);
// Set the primary predicate to the result of Predicate OP SecondPredicate
const OperationCode combiner = GetPredicateCombiner(instr.isetp.op);
const Node value = Operation(combiner, predicate, second_pred);
SetPredicate(bb, instr.isetp.pred3, value);
if (instr.isetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
// Set the secondary predicate to the result of !Predicate OP SecondPredicate, if enabled
const Node negated_pred = Operation(OperationCode::LogicalNegate, predicate);
SetPredicate(bb, instr.isetp.pred0, Operation(combiner, negated_pred, second_pred));
}
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <vector>
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Attribute;
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Register;
using Tegra::Shader::TextureMiscMode;
using Tegra::Shader::TextureProcessMode;
using Tegra::Shader::TextureType;
static std::size_t GetCoordCount(TextureType texture_type) {
switch (texture_type) {
case TextureType::Texture1D:
return 1;
case TextureType::Texture2D:
return 2;
case TextureType::Texture3D:
case TextureType::TextureCube:
return 3;
default:
UNIMPLEMENTED_MSG("Unhandled texture type: {}", static_cast<u32>(texture_type));
return 0;
}
}
u32 ShaderIR::DecodeMemory(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
switch (opcode->get().GetId()) {
case OpCode::Id::LD_A: {
// Note: Shouldn't this be interp mode flat? As in no interpolation made.
UNIMPLEMENTED_IF_MSG(instr.gpr8.Value() != Register::ZeroIndex,
"Indirect attribute loads are not supported");
UNIMPLEMENTED_IF_MSG((instr.attribute.fmt20.immediate.Value() % sizeof(u32)) != 0,
"Unaligned attribute loads are not supported");
Tegra::Shader::IpaMode input_mode{Tegra::Shader::IpaInterpMode::Perspective,
Tegra::Shader::IpaSampleMode::Default};
u64 next_element = instr.attribute.fmt20.element;
auto next_index = static_cast<u64>(instr.attribute.fmt20.index.Value());
const auto LoadNextElement = [&](u32 reg_offset) {
const Node buffer = GetRegister(instr.gpr39);
const Node attribute = GetInputAttribute(static_cast<Attribute::Index>(next_index),
next_element, input_mode, buffer);
SetRegister(bb, instr.gpr0.Value() + reg_offset, attribute);
// Load the next attribute element into the following register. If the element
// to load goes beyond the vec4 size, load the first element of the next
// attribute.
next_element = (next_element + 1) % 4;
next_index = next_index + (next_element == 0 ? 1 : 0);
};
const u32 num_words = static_cast<u32>(instr.attribute.fmt20.size.Value()) + 1;
for (u32 reg_offset = 0; reg_offset < num_words; ++reg_offset) {
LoadNextElement(reg_offset);
}
break;
}
case OpCode::Id::LD_C: {
UNIMPLEMENTED_IF(instr.ld_c.unknown != 0);
Node index = GetRegister(instr.gpr8);
const Node op_a =
GetConstBufferIndirect(instr.cbuf36.index, instr.cbuf36.offset + 0, index);
switch (instr.ld_c.type.Value()) {
case Tegra::Shader::UniformType::Single:
SetRegister(bb, instr.gpr0, op_a);
break;
case Tegra::Shader::UniformType::Double: {
const Node op_b =
GetConstBufferIndirect(instr.cbuf36.index, instr.cbuf36.offset + 4, index);
SetTemporal(bb, 0, op_a);
SetTemporal(bb, 1, op_b);
SetRegister(bb, instr.gpr0, GetTemporal(0));
SetRegister(bb, instr.gpr0.Value() + 1, GetTemporal(1));
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled type: {}", static_cast<unsigned>(instr.ld_c.type.Value()));
}
break;
}
case OpCode::Id::LD_L: {
UNIMPLEMENTED_IF_MSG(instr.ld_l.unknown == 1, "LD_L Unhandled mode: {}",
static_cast<unsigned>(instr.ld_l.unknown.Value()));
const Node index = Operation(OperationCode::IAdd, GetRegister(instr.gpr8),
Immediate(static_cast<s32>(instr.smem_imm)));
const Node lmem = GetLocalMemory(index);
switch (instr.ldst_sl.type.Value()) {
case Tegra::Shader::StoreType::Bytes32:
SetRegister(bb, instr.gpr0, lmem);
break;
default:
UNIMPLEMENTED_MSG("LD_L Unhandled type: {}",
static_cast<unsigned>(instr.ldst_sl.type.Value()));
}
break;
}
case OpCode::Id::ST_A: {
UNIMPLEMENTED_IF_MSG(instr.gpr8.Value() != Register::ZeroIndex,
"Indirect attribute loads are not supported");
UNIMPLEMENTED_IF_MSG((instr.attribute.fmt20.immediate.Value() % sizeof(u32)) != 0,
"Unaligned attribute loads are not supported");
u64 next_element = instr.attribute.fmt20.element;
auto next_index = static_cast<u64>(instr.attribute.fmt20.index.Value());
const auto StoreNextElement = [&](u32 reg_offset) {
const auto dest = GetOutputAttribute(static_cast<Attribute::Index>(next_index),
next_element, GetRegister(instr.gpr39));
const auto src = GetRegister(instr.gpr0.Value() + reg_offset);
bb.push_back(Operation(OperationCode::Assign, dest, src));
// Load the next attribute element into the following register. If the element
// to load goes beyond the vec4 size, load the first element of the next
// attribute.
next_element = (next_element + 1) % 4;
next_index = next_index + (next_element == 0 ? 1 : 0);
};
const u32 num_words = static_cast<u32>(instr.attribute.fmt20.size.Value()) + 1;
for (u32 reg_offset = 0; reg_offset < num_words; ++reg_offset) {
StoreNextElement(reg_offset);
}
break;
}
case OpCode::Id::ST_L: {
UNIMPLEMENTED_IF_MSG(instr.st_l.unknown == 0, "ST_L Unhandled mode: {}",
static_cast<u32>(instr.st_l.unknown.Value()));
const Node index = Operation(OperationCode::IAdd, NO_PRECISE, GetRegister(instr.gpr8),
Immediate(static_cast<s32>(instr.smem_imm)));
switch (instr.ldst_sl.type.Value()) {
case Tegra::Shader::StoreType::Bytes32:
SetLocalMemory(bb, index, GetRegister(instr.gpr0));
break;
default:
UNIMPLEMENTED_MSG("ST_L Unhandled type: {}",
static_cast<u32>(instr.ldst_sl.type.Value()));
}
break;
}
case OpCode::Id::TEX: {
UNIMPLEMENTED_IF_MSG(instr.tex.UsesMiscMode(TextureMiscMode::AOFFI),
"AOFFI is not implemented");
if (instr.tex.UsesMiscMode(TextureMiscMode::NODEP)) {
LOG_WARNING(HW_GPU, "TEX.NODEP implementation is incomplete");
}
const TextureType texture_type{instr.tex.texture_type};
const bool is_array = instr.tex.array != 0;
const bool depth_compare = instr.tex.UsesMiscMode(TextureMiscMode::DC);
const auto process_mode = instr.tex.GetTextureProcessMode();
WriteTexInstructionFloat(
bb, instr, GetTexCode(instr, texture_type, process_mode, depth_compare, is_array));
break;
}
case OpCode::Id::TEXS: {
const TextureType texture_type{instr.texs.GetTextureType()};
const bool is_array{instr.texs.IsArrayTexture()};
const bool depth_compare = instr.texs.UsesMiscMode(TextureMiscMode::DC);
const auto process_mode = instr.texs.GetTextureProcessMode();
if (instr.texs.UsesMiscMode(TextureMiscMode::NODEP)) {
LOG_WARNING(HW_GPU, "TEXS.NODEP implementation is incomplete");
}
const Node4 components =
GetTexsCode(instr, texture_type, process_mode, depth_compare, is_array);
if (instr.texs.fp32_flag) {
WriteTexsInstructionFloat(bb, instr, components);
} else {
WriteTexsInstructionHalfFloat(bb, instr, components);
}
break;
}
case OpCode::Id::TLD4: {
ASSERT(instr.tld4.array == 0);
UNIMPLEMENTED_IF_MSG(instr.tld4.UsesMiscMode(TextureMiscMode::AOFFI),
"AOFFI is not implemented");
UNIMPLEMENTED_IF_MSG(instr.tld4.UsesMiscMode(TextureMiscMode::NDV),
"NDV is not implemented");
UNIMPLEMENTED_IF_MSG(instr.tld4.UsesMiscMode(TextureMiscMode::PTP),
"PTP is not implemented");
if (instr.tld4.UsesMiscMode(TextureMiscMode::NODEP)) {
LOG_WARNING(HW_GPU, "TLD4.NODEP implementation is incomplete");
}
const auto texture_type = instr.tld4.texture_type.Value();
const bool depth_compare = instr.tld4.UsesMiscMode(TextureMiscMode::DC);
const bool is_array = instr.tld4.array != 0;
WriteTexInstructionFloat(bb, instr,
GetTld4Code(instr, texture_type, depth_compare, is_array));
break;
}
case OpCode::Id::TLD4S: {
UNIMPLEMENTED_IF_MSG(instr.tld4s.UsesMiscMode(TextureMiscMode::AOFFI),
"AOFFI is not implemented");
if (instr.tld4s.UsesMiscMode(TextureMiscMode::NODEP)) {
LOG_WARNING(HW_GPU, "TLD4S.NODEP implementation is incomplete");
}
const bool depth_compare = instr.tld4s.UsesMiscMode(TextureMiscMode::DC);
const Node op_a = GetRegister(instr.gpr8);
const Node op_b = GetRegister(instr.gpr20);
std::vector<Node> coords;
// TODO(Subv): Figure out how the sampler type is encoded in the TLD4S instruction.
if (depth_compare) {
// Note: TLD4S coordinate encoding works just like TEXS's
const Node op_y = GetRegister(instr.gpr8.Value() + 1);
coords.push_back(op_a);
coords.push_back(op_y);
coords.push_back(op_b);
} else {
coords.push_back(op_a);
coords.push_back(op_b);
}
const auto num_coords = static_cast<u32>(coords.size());
coords.push_back(Immediate(static_cast<u32>(instr.tld4s.component)));
const auto& sampler =
GetSampler(instr.sampler, TextureType::Texture2D, false, depth_compare);
Node4 values;
for (u32 element = 0; element < values.size(); ++element) {
auto params = coords;
MetaTexture meta{sampler, element, num_coords};
values[element] =
Operation(OperationCode::F4TextureGather, std::move(meta), std::move(params));
}
WriteTexsInstructionFloat(bb, instr, values);
break;
}
case OpCode::Id::TXQ: {
if (instr.txq.UsesMiscMode(TextureMiscMode::NODEP)) {
LOG_WARNING(HW_GPU, "TXQ.NODEP implementation is incomplete");
}
// TODO: The new commits on the texture refactor, change the way samplers work.
// Sadly, not all texture instructions specify the type of texture their sampler
// uses. This must be fixed at a later instance.
const auto& sampler =
GetSampler(instr.sampler, Tegra::Shader::TextureType::Texture2D, false, false);
switch (instr.txq.query_type) {
case Tegra::Shader::TextureQueryType::Dimension: {
for (u32 element = 0; element < 4; ++element) {
MetaTexture meta{sampler, element};
const Node value = Operation(OperationCode::F4TextureQueryDimensions,
std::move(meta), GetRegister(instr.gpr8));
SetTemporal(bb, element, value);
}
for (u32 i = 0; i < 4; ++i) {
SetRegister(bb, instr.gpr0.Value() + i, GetTemporal(i));
}
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled texture query type: {}",
static_cast<u32>(instr.txq.query_type.Value()));
}
break;
}
case OpCode::Id::TMML: {
UNIMPLEMENTED_IF_MSG(instr.tmml.UsesMiscMode(Tegra::Shader::TextureMiscMode::NDV),
"NDV is not implemented");
if (instr.tmml.UsesMiscMode(TextureMiscMode::NODEP)) {
LOG_WARNING(HW_GPU, "TMML.NODEP implementation is incomplete");
}
auto texture_type = instr.tmml.texture_type.Value();
const bool is_array = instr.tmml.array != 0;
const auto& sampler = GetSampler(instr.sampler, texture_type, is_array, false);
std::vector<Node> coords;
// TODO: Add coordinates for different samplers once other texture types are implemented.
switch (texture_type) {
case TextureType::Texture1D:
coords.push_back(GetRegister(instr.gpr8));
break;
case TextureType::Texture2D:
coords.push_back(GetRegister(instr.gpr8.Value() + 0));
coords.push_back(GetRegister(instr.gpr8.Value() + 1));
break;
default:
UNIMPLEMENTED_MSG("Unhandled texture type {}", static_cast<u32>(texture_type));
// Fallback to interpreting as a 2D texture for now
coords.push_back(GetRegister(instr.gpr8.Value() + 0));
coords.push_back(GetRegister(instr.gpr8.Value() + 1));
texture_type = TextureType::Texture2D;
}
for (u32 element = 0; element < 2; ++element) {
auto params = coords;
MetaTexture meta_texture{sampler, element, static_cast<u32>(coords.size())};
const Node value =
Operation(OperationCode::F4TextureQueryLod, meta_texture, std::move(params));
SetTemporal(bb, element, value);
}
for (u32 element = 0; element < 2; ++element) {
SetRegister(bb, instr.gpr0.Value() + element, GetTemporal(element));
}
break;
}
case OpCode::Id::TLDS: {
const Tegra::Shader::TextureType texture_type{instr.tlds.GetTextureType()};
const bool is_array{instr.tlds.IsArrayTexture()};
UNIMPLEMENTED_IF_MSG(instr.tlds.UsesMiscMode(TextureMiscMode::AOFFI),
"AOFFI is not implemented");
UNIMPLEMENTED_IF_MSG(instr.tlds.UsesMiscMode(TextureMiscMode::MZ), "MZ is not implemented");
if (instr.tlds.UsesMiscMode(TextureMiscMode::NODEP)) {
LOG_WARNING(HW_GPU, "TMML.NODEP implementation is incomplete");
}
WriteTexsInstructionFloat(bb, instr, GetTldsCode(instr, texture_type, is_array));
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled memory instruction: {}", opcode->get().GetName());
}
return pc;
}
const Sampler& ShaderIR::GetSampler(const Tegra::Shader::Sampler& sampler, TextureType type,
bool is_array, bool is_shadow) {
const auto offset = static_cast<std::size_t>(sampler.index.Value());
// If this sampler has already been used, return the existing mapping.
const auto itr =
std::find_if(used_samplers.begin(), used_samplers.end(),
[&](const Sampler& entry) { return entry.GetOffset() == offset; });
if (itr != used_samplers.end()) {
ASSERT(itr->GetType() == type && itr->IsArray() == is_array &&
itr->IsShadow() == is_shadow);
return *itr;
}
// Otherwise create a new mapping for this sampler
const std::size_t next_index = used_samplers.size();
const Sampler entry{offset, next_index, type, is_array, is_shadow};
return *used_samplers.emplace(entry).first;
}
void ShaderIR::WriteTexInstructionFloat(BasicBlock& bb, Instruction instr,
const Node4& components) {
u32 dest_elem = 0;
for (u32 elem = 0; elem < 4; ++elem) {
if (!instr.tex.IsComponentEnabled(elem)) {
// Skip disabled components
continue;
}
SetTemporal(bb, dest_elem++, components[elem]);
}
// After writing values in temporals, move them to the real registers
for (u32 i = 0; i < dest_elem; ++i) {
SetRegister(bb, instr.gpr0.Value() + i, GetTemporal(i));
}
}
void ShaderIR::WriteTexsInstructionFloat(BasicBlock& bb, Instruction instr,
const Node4& components) {
// TEXS has two destination registers and a swizzle. The first two elements in the swizzle
// go into gpr0+0 and gpr0+1, and the rest goes into gpr28+0 and gpr28+1
u32 dest_elem = 0;
for (u32 component = 0; component < 4; ++component) {
if (!instr.texs.IsComponentEnabled(component))
continue;
SetTemporal(bb, dest_elem++, components[component]);
}
for (u32 i = 0; i < dest_elem; ++i) {
if (i < 2) {
// Write the first two swizzle components to gpr0 and gpr0+1
SetRegister(bb, instr.gpr0.Value() + i % 2, GetTemporal(i));
} else {
ASSERT(instr.texs.HasTwoDestinations());
// Write the rest of the swizzle components to gpr28 and gpr28+1
SetRegister(bb, instr.gpr28.Value() + i % 2, GetTemporal(i));
}
}
}
void ShaderIR::WriteTexsInstructionHalfFloat(BasicBlock& bb, Instruction instr,
const Node4& components) {
// TEXS.F16 destionation registers are packed in two registers in pairs (just like any half
// float instruction).
Node4 values;
u32 dest_elem = 0;
for (u32 component = 0; component < 4; ++component) {
if (!instr.texs.IsComponentEnabled(component))
continue;
values[dest_elem++] = components[component];
}
if (dest_elem == 0)
return;
std::generate(values.begin() + dest_elem, values.end(), [&]() { return Immediate(0); });
const Node first_value = Operation(OperationCode::HPack2, values[0], values[1]);
if (dest_elem <= 2) {
SetRegister(bb, instr.gpr0, first_value);
return;
}
SetTemporal(bb, 0, first_value);
SetTemporal(bb, 1, Operation(OperationCode::HPack2, values[2], values[3]));
SetRegister(bb, instr.gpr0, GetTemporal(0));
SetRegister(bb, instr.gpr28, GetTemporal(1));
}
Node4 ShaderIR::GetTextureCode(Instruction instr, TextureType texture_type,
TextureProcessMode process_mode, bool depth_compare, bool is_array,
std::size_t array_offset, std::size_t bias_offset,
std::vector<Node>&& coords) {
UNIMPLEMENTED_IF_MSG(
(texture_type == TextureType::Texture3D && (is_array || depth_compare)) ||
(texture_type == TextureType::TextureCube && is_array && depth_compare),
"This method is not supported.");
const auto& sampler = GetSampler(instr.sampler, texture_type, is_array, depth_compare);
const bool lod_needed = process_mode == TextureProcessMode::LZ ||
process_mode == TextureProcessMode::LL ||
process_mode == TextureProcessMode::LLA;
// LOD selection (either via bias or explicit textureLod) not supported in GL for
// sampler2DArrayShadow and samplerCubeArrayShadow.
const bool gl_lod_supported =
!((texture_type == Tegra::Shader::TextureType::Texture2D && is_array && depth_compare) ||
(texture_type == Tegra::Shader::TextureType::TextureCube && is_array && depth_compare));
const OperationCode read_method =
lod_needed && gl_lod_supported ? OperationCode::F4TextureLod : OperationCode::F4Texture;
UNIMPLEMENTED_IF(process_mode != TextureProcessMode::None && !gl_lod_supported);
std::optional<u32> array_offset_value;
if (is_array)
array_offset_value = static_cast<u32>(array_offset);
const auto coords_count = static_cast<u32>(coords.size());
if (process_mode != TextureProcessMode::None && gl_lod_supported) {
if (process_mode == TextureProcessMode::LZ) {
coords.push_back(Immediate(0.0f));
} else {
// If present, lod or bias are always stored in the register indexed by the gpr20
// field with an offset depending on the usage of the other registers
coords.push_back(GetRegister(instr.gpr20.Value() + bias_offset));
}
}
Node4 values;
for (u32 element = 0; element < values.size(); ++element) {
auto params = coords;
MetaTexture meta{sampler, element, coords_count, array_offset_value};
values[element] = Operation(read_method, std::move(meta), std::move(params));
}
return values;
}
Node4 ShaderIR::GetTexCode(Instruction instr, TextureType texture_type,
TextureProcessMode process_mode, bool depth_compare, bool is_array) {
const bool lod_bias_enabled =
(process_mode != TextureProcessMode::None && process_mode != TextureProcessMode::LZ);
const auto [coord_count, total_coord_count] = ValidateAndGetCoordinateElement(
texture_type, depth_compare, is_array, lod_bias_enabled, 4, 5);
// If enabled arrays index is always stored in the gpr8 field
const u64 array_register = instr.gpr8.Value();
// First coordinate index is the gpr8 or gpr8 + 1 when arrays are used
const u64 coord_register = array_register + (is_array ? 1 : 0);
std::vector<Node> coords;
for (std::size_t i = 0; i < coord_count; ++i) {
coords.push_back(GetRegister(coord_register + i));
}
// 1D.DC in opengl the 2nd component is ignored.
if (depth_compare && !is_array && texture_type == TextureType::Texture1D) {
coords.push_back(Immediate(0.0f));
}
std::size_t array_offset{};
if (is_array) {
array_offset = coords.size();
coords.push_back(GetRegister(array_register));
}
if (depth_compare) {
// Depth is always stored in the register signaled by gpr20
// or in the next register if lod or bias are used
const u64 depth_register = instr.gpr20.Value() + (lod_bias_enabled ? 1 : 0);
coords.push_back(GetRegister(depth_register));
}
// Fill ignored coordinates
while (coords.size() < total_coord_count) {
coords.push_back(Immediate(0));
}
return GetTextureCode(instr, texture_type, process_mode, depth_compare, is_array, array_offset,
0, std::move(coords));
}
Node4 ShaderIR::GetTexsCode(Instruction instr, TextureType texture_type,
TextureProcessMode process_mode, bool depth_compare, bool is_array) {
const bool lod_bias_enabled =
(process_mode != TextureProcessMode::None && process_mode != TextureProcessMode::LZ);
const auto [coord_count, total_coord_count] = ValidateAndGetCoordinateElement(
texture_type, depth_compare, is_array, lod_bias_enabled, 4, 4);
// If enabled arrays index is always stored in the gpr8 field
const u64 array_register = instr.gpr8.Value();
// First coordinate index is stored in gpr8 field or (gpr8 + 1) when arrays are used
const u64 coord_register = array_register + (is_array ? 1 : 0);
const u64 last_coord_register =
(is_array || !(lod_bias_enabled || depth_compare) || (coord_count > 2))
? static_cast<u64>(instr.gpr20.Value())
: coord_register + 1;
std::vector<Node> coords;
for (std::size_t i = 0; i < coord_count; ++i) {
const bool last = (i == (coord_count - 1)) && (coord_count > 1);
coords.push_back(GetRegister(last ? last_coord_register : coord_register + i));
}
std::size_t array_offset{};
if (is_array) {
array_offset = coords.size();
coords.push_back(GetRegister(array_register));
}
if (depth_compare) {
// Depth is always stored in the register signaled by gpr20
// or in the next register if lod or bias are used
const u64 depth_register = instr.gpr20.Value() + (lod_bias_enabled ? 1 : 0);
coords.push_back(GetRegister(depth_register));
}
// Fill ignored coordinates
while (coords.size() < total_coord_count) {
coords.push_back(Immediate(0));
}
return GetTextureCode(instr, texture_type, process_mode, depth_compare, is_array, array_offset,
(coord_count > 2 ? 1 : 0), std::move(coords));
}
Node4 ShaderIR::GetTld4Code(Instruction instr, TextureType texture_type, bool depth_compare,
bool is_array) {
const std::size_t coord_count = GetCoordCount(texture_type);
const std::size_t total_coord_count = coord_count + (is_array ? 1 : 0);
const std::size_t total_reg_count = total_coord_count + (depth_compare ? 1 : 0);
// If enabled arrays index is always stored in the gpr8 field
const u64 array_register = instr.gpr8.Value();
// First coordinate index is the gpr8 or gpr8 + 1 when arrays are used
const u64 coord_register = array_register + (is_array ? 1 : 0);
std::vector<Node> coords;
for (size_t i = 0; i < coord_count; ++i) {
coords.push_back(GetRegister(coord_register + i));
}
std::optional<u32> array_offset;
if (is_array) {
array_offset = static_cast<u32>(coords.size());
coords.push_back(GetRegister(array_register));
}
const auto& sampler = GetSampler(instr.sampler, texture_type, is_array, depth_compare);
Node4 values;
for (u32 element = 0; element < values.size(); ++element) {
auto params = coords;
MetaTexture meta{sampler, element, static_cast<u32>(coords.size()), array_offset};
values[element] =
Operation(OperationCode::F4TextureGather, std::move(meta), std::move(params));
}
return values;
}
Node4 ShaderIR::GetTldsCode(Instruction instr, TextureType texture_type, bool is_array) {
const std::size_t type_coord_count = GetCoordCount(texture_type);
const std::size_t total_coord_count = type_coord_count + (is_array ? 1 : 0);
const bool lod_enabled = instr.tlds.GetTextureProcessMode() == TextureProcessMode::LL;
// If enabled arrays index is always stored in the gpr8 field
const u64 array_register = instr.gpr8.Value();
// if is array gpr20 is used
const u64 coord_register = is_array ? instr.gpr20.Value() : instr.gpr8.Value();
const u64 last_coord_register =
((type_coord_count > 2) || (type_coord_count == 2 && !lod_enabled)) && !is_array
? static_cast<u64>(instr.gpr20.Value())
: coord_register + 1;
std::vector<Node> coords;
for (std::size_t i = 0; i < type_coord_count; ++i) {
const bool last = (i == (type_coord_count - 1)) && (type_coord_count > 1);
coords.push_back(GetRegister(last ? last_coord_register : coord_register + i));
}
std::optional<u32> array_offset;
if (is_array) {
array_offset = static_cast<u32>(coords.size());
coords.push_back(GetRegister(array_register));
}
const auto coords_count = static_cast<u32>(coords.size());
if (lod_enabled) {
// When lod is used always is in grp20
coords.push_back(GetRegister(instr.gpr20));
} else {
coords.push_back(Immediate(0));
}
const auto& sampler = GetSampler(instr.sampler, texture_type, is_array, false);
Node4 values;
for (u32 element = 0; element < values.size(); ++element) {
auto params = coords;
MetaTexture meta{sampler, element, coords_count, array_offset};
values[element] =
Operation(OperationCode::F4TexelFetch, std::move(meta), std::move(params));
}
return values;
}
std::tuple<std::size_t, std::size_t> ShaderIR::ValidateAndGetCoordinateElement(
TextureType texture_type, bool depth_compare, bool is_array, bool lod_bias_enabled,
std::size_t max_coords, std::size_t max_inputs) {
const std::size_t coord_count = GetCoordCount(texture_type);
std::size_t total_coord_count = coord_count + (is_array ? 1 : 0) + (depth_compare ? 1 : 0);
const std::size_t total_reg_count = total_coord_count + (lod_bias_enabled ? 1 : 0);
if (total_coord_count > max_coords || total_reg_count > max_inputs) {
UNIMPLEMENTED_MSG("Unsupported Texture operation");
total_coord_count = std::min(total_coord_count, max_coords);
}
// 1D.DC OpenGL is using a vec3 but 2nd component is ignored later.
total_coord_count +=
(depth_compare && !is_array && texture_type == TextureType::Texture1D) ? 1 : 0;
return {coord_count, total_coord_count};
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::ConditionCode;
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Register;
u32 ShaderIR::DecodeOther(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
switch (opcode->get().GetId()) {
case OpCode::Id::EXIT: {
const Tegra::Shader::ConditionCode cc = instr.flow_condition_code;
UNIMPLEMENTED_IF_MSG(cc != Tegra::Shader::ConditionCode::T, "EXIT condition code used: {}",
static_cast<u32>(cc));
switch (instr.flow.cond) {
case Tegra::Shader::FlowCondition::Always:
bb.push_back(Operation(OperationCode::Exit));
if (instr.pred.pred_index == static_cast<u64>(Tegra::Shader::Pred::UnusedIndex)) {
// If this is an unconditional exit then just end processing here,
// otherwise we have to account for the possibility of the condition
// not being met, so continue processing the next instruction.
pc = MAX_PROGRAM_LENGTH - 1;
}
break;
case Tegra::Shader::FlowCondition::Fcsm_Tr:
// TODO(bunnei): What is this used for? If we assume this conditon is not
// satisifed, dual vertex shaders in Farming Simulator make more sense
UNIMPLEMENTED_MSG("Skipping unknown FlowCondition::Fcsm_Tr");
break;
default:
UNIMPLEMENTED_MSG("Unhandled flow condition: {}",
static_cast<u32>(instr.flow.cond.Value()));
}
break;
}
case OpCode::Id::KIL: {
UNIMPLEMENTED_IF(instr.flow.cond != Tegra::Shader::FlowCondition::Always);
const Tegra::Shader::ConditionCode cc = instr.flow_condition_code;
UNIMPLEMENTED_IF_MSG(cc != Tegra::Shader::ConditionCode::T, "KIL condition code used: {}",
static_cast<u32>(cc));
bb.push_back(Operation(OperationCode::Discard));
break;
}
case OpCode::Id::MOV_SYS: {
switch (instr.sys20) {
case Tegra::Shader::SystemVariable::InvocationInfo: {
LOG_WARNING(HW_GPU, "MOV_SYS instruction with InvocationInfo is incomplete");
SetRegister(bb, instr.gpr0, Immediate(0u));
break;
}
case Tegra::Shader::SystemVariable::Ydirection: {
// Config pack's third value is Y_NEGATE's state.
SetRegister(bb, instr.gpr0, Operation(OperationCode::YNegate));
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled system move: {}", static_cast<u32>(instr.sys20.Value()));
}
break;
}
case OpCode::Id::BRA: {
UNIMPLEMENTED_IF_MSG(instr.bra.constant_buffer != 0,
"BRA with constant buffers are not implemented");
const u32 target = pc + instr.bra.GetBranchTarget();
const Node branch = Operation(OperationCode::Branch, Immediate(target));
const Tegra::Shader::ConditionCode cc = instr.flow_condition_code;
if (cc != Tegra::Shader::ConditionCode::T) {
bb.push_back(Conditional(GetConditionCode(cc), {branch}));
} else {
bb.push_back(branch);
}
break;
}
case OpCode::Id::SSY: {
UNIMPLEMENTED_IF_MSG(instr.bra.constant_buffer != 0,
"Constant buffer flow is not supported");
// The SSY opcode tells the GPU where to re-converge divergent execution paths, it sets the
// target of the jump that the SYNC instruction will make. The SSY opcode has a similar
// structure to the BRA opcode.
const u32 target = pc + instr.bra.GetBranchTarget();
bb.push_back(Operation(OperationCode::PushFlowStack, Immediate(target)));
break;
}
case OpCode::Id::PBK: {
UNIMPLEMENTED_IF_MSG(instr.bra.constant_buffer != 0,
"Constant buffer PBK is not supported");
// PBK pushes to a stack the address where BRK will jump to. This shares stack with SSY but
// using SYNC on a PBK address will kill the shader execution. We don't emulate this because
// it's very unlikely a driver will emit such invalid shader.
const u32 target = pc + instr.bra.GetBranchTarget();
bb.push_back(Operation(OperationCode::PushFlowStack, Immediate(target)));
break;
}
case OpCode::Id::SYNC: {
const Tegra::Shader::ConditionCode cc = instr.flow_condition_code;
UNIMPLEMENTED_IF_MSG(cc != Tegra::Shader::ConditionCode::T, "SYNC condition code used: {}",
static_cast<u32>(cc));
// The SYNC opcode jumps to the address previously set by the SSY opcode
bb.push_back(Operation(OperationCode::PopFlowStack));
break;
}
case OpCode::Id::BRK: {
const Tegra::Shader::ConditionCode cc = instr.flow_condition_code;
UNIMPLEMENTED_IF_MSG(cc != Tegra::Shader::ConditionCode::T, "BRK condition code used: {}",
static_cast<u32>(cc));
// The BRK opcode jumps to the address previously set by the PBK opcode
bb.push_back(Operation(OperationCode::PopFlowStack));
break;
}
case OpCode::Id::IPA: {
const auto& attribute = instr.attribute.fmt28;
const Tegra::Shader::IpaMode input_mode{instr.ipa.interp_mode.Value(),
instr.ipa.sample_mode.Value()};
const Node attr = GetInputAttribute(attribute.index, attribute.element, input_mode);
const Node value = GetSaturatedFloat(attr, instr.ipa.saturate);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::OUT_R: {
UNIMPLEMENTED_IF_MSG(instr.gpr20.Value() != Register::ZeroIndex,
"Stream buffer is not supported");
if (instr.out.emit) {
// gpr0 is used to store the next address and gpr8 contains the address to emit.
// Hardware uses pointers here but we just ignore it
bb.push_back(Operation(OperationCode::EmitVertex));
SetRegister(bb, instr.gpr0, Immediate(0));
}
if (instr.out.cut) {
bb.push_back(Operation(OperationCode::EndPrimitive));
}
break;
}
case OpCode::Id::ISBERD: {
UNIMPLEMENTED_IF(instr.isberd.o != 0);
UNIMPLEMENTED_IF(instr.isberd.skew != 0);
UNIMPLEMENTED_IF(instr.isberd.shift != Tegra::Shader::IsberdShift::None);
UNIMPLEMENTED_IF(instr.isberd.mode != Tegra::Shader::IsberdMode::None);
LOG_WARNING(HW_GPU, "ISBERD instruction is incomplete");
SetRegister(bb, instr.gpr0, GetRegister(instr.gpr8));
break;
}
case OpCode::Id::DEPBAR: {
LOG_WARNING(HW_GPU, "DEPBAR instruction is stubbed");
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled instruction: {}", opcode->get().GetName());
}
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Pred;
u32 ShaderIR::DecodePredicateSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
switch (opcode->get().GetId()) {
case OpCode::Id::PSETP: {
const Node op_a = GetPredicate(instr.psetp.pred12, instr.psetp.neg_pred12 != 0);
const Node op_b = GetPredicate(instr.psetp.pred29, instr.psetp.neg_pred29 != 0);
// We can't use the constant predicate as destination.
ASSERT(instr.psetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
const Node second_pred = GetPredicate(instr.psetp.pred39, instr.psetp.neg_pred39 != 0);
const OperationCode combiner = GetPredicateCombiner(instr.psetp.op);
const Node predicate = Operation(combiner, op_a, op_b);
// Set the primary predicate to the result of Predicate OP SecondPredicate
SetPredicate(bb, instr.psetp.pred3, Operation(combiner, predicate, second_pred));
if (instr.psetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
// Set the secondary predicate to the result of !Predicate OP SecondPredicate, if
// enabled
SetPredicate(bb, instr.psetp.pred0,
Operation(combiner, Operation(OperationCode::LogicalNegate, predicate),
second_pred));
}
break;
}
case OpCode::Id::CSETP: {
const Node pred = GetPredicate(instr.csetp.pred39, instr.csetp.neg_pred39 != 0);
const Node condition_code = GetConditionCode(instr.csetp.cc);
const OperationCode combiner = GetPredicateCombiner(instr.csetp.op);
if (instr.csetp.pred3 != static_cast<u64>(Pred::UnusedIndex)) {
SetPredicate(bb, instr.csetp.pred3, Operation(combiner, condition_code, pred));
}
if (instr.csetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
const Node neg_cc = Operation(OperationCode::LogicalNegate, condition_code);
SetPredicate(bb, instr.csetp.pred0, Operation(combiner, neg_cc, pred));
}
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled predicate instruction: {}", opcode->get().GetName());
}
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodePredicateSetRegister(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in PSET is not implemented");
const Node op_a = GetPredicate(instr.pset.pred12, instr.pset.neg_pred12 != 0);
const Node op_b = GetPredicate(instr.pset.pred29, instr.pset.neg_pred29 != 0);
const Node first_pred = Operation(GetPredicateCombiner(instr.pset.cond), op_a, op_b);
const Node second_pred = GetPredicate(instr.pset.pred39, instr.pset.neg_pred39 != 0);
const OperationCode combiner = GetPredicateCombiner(instr.pset.op);
const Node predicate = Operation(combiner, first_pred, second_pred);
const Node true_value = instr.pset.bf ? Immediate(1.0f) : Immediate(0xffffffff);
const Node false_value = instr.pset.bf ? Immediate(0.0f) : Immediate(0);
const Node value =
Operation(OperationCode::Select, PRECISE, predicate, true_value, false_value);
if (instr.pset.bf) {
SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
} else {
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
}
SetRegister(bb, instr.gpr0, value);
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeRegisterSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED_IF(instr.r2p.mode != Tegra::Shader::R2pMode::Pr);
const Node apply_mask = [&]() {
switch (opcode->get().GetId()) {
case OpCode::Id::R2P_IMM:
return Immediate(static_cast<u32>(instr.r2p.immediate_mask));
default:
UNREACHABLE();
return Immediate(static_cast<u32>(instr.r2p.immediate_mask));
}
}();
const Node mask = GetRegister(instr.gpr8);
const auto offset = static_cast<u32>(instr.r2p.byte) * 8;
constexpr u32 programmable_preds = 7;
for (u64 pred = 0; pred < programmable_preds; ++pred) {
const auto shift = static_cast<u32>(pred);
const Node apply_compare = BitfieldExtract(apply_mask, shift, 1);
const Node condition =
Operation(OperationCode::LogicalUNotEqual, apply_compare, Immediate(0));
const Node value_compare = BitfieldExtract(mask, offset + shift, 1);
const Node value = Operation(OperationCode::LogicalUNotEqual, value_compare, Immediate(0));
const Node code = Operation(OperationCode::LogicalAssign, GetPredicate(pred), value);
bb.push_back(Conditional(condition, {code}));
}
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeShift(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
const Node op_a = GetRegister(instr.gpr8);
const Node op_b = [&]() {
if (instr.is_b_imm) {
return Immediate(instr.alu.GetSignedImm20_20());
} else if (instr.is_b_gpr) {
return GetRegister(instr.gpr20);
} else {
return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
}
}();
switch (opcode->get().GetId()) {
case OpCode::Id::SHR_C:
case OpCode::Id::SHR_R:
case OpCode::Id::SHR_IMM: {
const Node value = SignedOperation(OperationCode::IArithmeticShiftRight,
instr.shift.is_signed, PRECISE, op_a, op_b);
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::SHL_C:
case OpCode::Id::SHL_R:
case OpCode::Id::SHL_IMM: {
const Node value = Operation(OperationCode::ILogicalShiftLeft, PRECISE, op_a, op_b);
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled shift instruction: {}", opcode->get().GetName());
}
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Pred;
using Tegra::Shader::VideoType;
using Tegra::Shader::VmadShr;
u32 ShaderIR::DecodeVideo(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
const Node op_a =
GetVideoOperand(GetRegister(instr.gpr8), instr.video.is_byte_chunk_a, instr.video.signed_a,
instr.video.type_a, instr.video.byte_height_a);
const Node op_b = [&]() {
if (instr.video.use_register_b) {
return GetVideoOperand(GetRegister(instr.gpr20), instr.video.is_byte_chunk_b,
instr.video.signed_b, instr.video.type_b,
instr.video.byte_height_b);
}
if (instr.video.signed_b) {
const auto imm = static_cast<s16>(instr.alu.GetImm20_16());
return Immediate(static_cast<u32>(imm));
} else {
return Immediate(instr.alu.GetImm20_16());
}
}();
switch (opcode->get().GetId()) {
case OpCode::Id::VMAD: {
const bool result_signed = instr.video.signed_a == 1 || instr.video.signed_b == 1;
const Node op_c = GetRegister(instr.gpr39);
Node value = SignedOperation(OperationCode::IMul, result_signed, NO_PRECISE, op_a, op_b);
value = SignedOperation(OperationCode::IAdd, result_signed, NO_PRECISE, value, op_c);
if (instr.vmad.shr == VmadShr::Shr7 || instr.vmad.shr == VmadShr::Shr15) {
const Node shift = Immediate(instr.vmad.shr == VmadShr::Shr7 ? 7 : 15);
value =
SignedOperation(OperationCode::IArithmeticShiftRight, result_signed, value, shift);
}
SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::VSETP: {
// We can't use the constant predicate as destination.
ASSERT(instr.vsetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
const bool sign = instr.video.signed_a == 1 || instr.video.signed_b == 1;
const Node first_pred = GetPredicateComparisonInteger(instr.vsetp.cond, sign, op_a, op_b);
const Node second_pred = GetPredicate(instr.vsetp.pred39, false);
const OperationCode combiner = GetPredicateCombiner(instr.vsetp.op);
// Set the primary predicate to the result of Predicate OP SecondPredicate
SetPredicate(bb, instr.vsetp.pred3, Operation(combiner, first_pred, second_pred));
if (instr.vsetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
// Set the secondary predicate to the result of !Predicate OP SecondPredicate,
// if enabled
const Node negate_pred = Operation(OperationCode::LogicalNegate, first_pred);
SetPredicate(bb, instr.vsetp.pred0, Operation(combiner, negate_pred, second_pred));
}
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled video instruction: {}", opcode->get().GetName());
}
return pc;
}
Node ShaderIR::GetVideoOperand(Node op, bool is_chunk, bool is_signed,
Tegra::Shader::VideoType type, u64 byte_height) {
if (!is_chunk) {
return BitfieldExtract(op, static_cast<u32>(byte_height * 8), 8);
}
const Node zero = Immediate(0);
switch (type) {
case Tegra::Shader::VideoType::Size16_Low:
return BitfieldExtract(op, 0, 16);
case Tegra::Shader::VideoType::Size16_High:
return BitfieldExtract(op, 16, 16);
case Tegra::Shader::VideoType::Size32:
// TODO(Rodrigo): From my hardware tests it becomes a bit "mad" when this type is used
// (1 * 1 + 0 == 0x5b800000). Until a better explanation is found: abort.
UNIMPLEMENTED();
return zero;
case Tegra::Shader::VideoType::Invalid:
UNREACHABLE_MSG("Invalid instruction encoding");
return zero;
default:
UNREACHABLE();
return zero;
}
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "common/common_types.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
u32 ShaderIR::DecodeXmad(BasicBlock& bb, const BasicBlock& code, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED_IF(instr.xmad.sign_a);
UNIMPLEMENTED_IF(instr.xmad.sign_b);
UNIMPLEMENTED_IF_MSG(instr.generates_cc,
"Condition codes generation in XMAD is not implemented");
Node op_a = GetRegister(instr.gpr8);
// TODO(bunnei): Needs to be fixed once op_a or op_b is signed
UNIMPLEMENTED_IF(instr.xmad.sign_a != instr.xmad.sign_b);
const bool is_signed_a = instr.xmad.sign_a == 1;
const bool is_signed_b = instr.xmad.sign_b == 1;
const bool is_signed_c = is_signed_a;
auto [is_merge, op_b, op_c] = [&]() -> std::tuple<bool, Node, Node> {
switch (opcode->get().GetId()) {
case OpCode::Id::XMAD_CR:
return {instr.xmad.merge_56, GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset),
GetRegister(instr.gpr39)};
case OpCode::Id::XMAD_RR:
return {instr.xmad.merge_37, GetRegister(instr.gpr20), GetRegister(instr.gpr39)};
case OpCode::Id::XMAD_RC:
return {false, GetRegister(instr.gpr39),
GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset)};
case OpCode::Id::XMAD_IMM:
return {instr.xmad.merge_37, Immediate(static_cast<u32>(instr.xmad.imm20_16)),
GetRegister(instr.gpr39)};
}
UNIMPLEMENTED_MSG("Unhandled XMAD instruction: {}", opcode->get().GetName());
return {false, Immediate(0), Immediate(0)};
}();
op_a = BitfieldExtract(op_a, instr.xmad.high_a ? 16 : 0, 16);
const Node original_b = op_b;
op_b = BitfieldExtract(op_b, instr.xmad.high_b ? 16 : 0, 16);
// TODO(Rodrigo): Use an appropiate sign for this operation
Node product = Operation(OperationCode::IMul, NO_PRECISE, op_a, op_b);
if (instr.xmad.product_shift_left) {
product = Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, product, Immediate(16));
}
const Node original_c = op_c;
op_c = [&]() {
switch (instr.xmad.mode) {
case Tegra::Shader::XmadMode::None:
return original_c;
case Tegra::Shader::XmadMode::CLo:
return BitfieldExtract(original_c, 0, 16);
case Tegra::Shader::XmadMode::CHi:
return BitfieldExtract(original_c, 16, 16);
case Tegra::Shader::XmadMode::CBcc: {
const Node shifted_b = SignedOperation(OperationCode::ILogicalShiftLeft, is_signed_b,
NO_PRECISE, original_b, Immediate(16));
return SignedOperation(OperationCode::IAdd, is_signed_c, NO_PRECISE, original_c,
shifted_b);
}
default:
UNIMPLEMENTED_MSG("Unhandled XMAD mode: {}", static_cast<u32>(instr.xmad.mode.Value()));
return Immediate(0);
}
}();
// TODO(Rodrigo): Use an appropiate sign for this operation
Node sum = Operation(OperationCode::IAdd, product, op_c);
if (is_merge) {
const Node a = BitfieldExtract(sum, 0, 16);
const Node b =
Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, original_b, Immediate(16));
sum = Operation(OperationCode::IBitwiseOr, NO_PRECISE, a, b);
}
SetInternalFlagsFromInteger(bb, sum, instr.generates_cc);
SetRegister(bb, instr.gpr0, sum);
return pc;
}
} // namespace VideoCommon::Shader

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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cmath>
#include <unordered_map>
#include "common/assert.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
using Tegra::Shader::Attribute;
using Tegra::Shader::Instruction;
using Tegra::Shader::IpaMode;
using Tegra::Shader::Pred;
using Tegra::Shader::PredCondition;
using Tegra::Shader::PredOperation;
using Tegra::Shader::Register;
Node ShaderIR::StoreNode(NodeData&& node_data) {
auto store = std::make_unique<NodeData>(node_data);
const Node node = store.get();
stored_nodes.push_back(std::move(store));
return node;
}
Node ShaderIR::Conditional(Node condition, std::vector<Node>&& code) {
return StoreNode(ConditionalNode(condition, std::move(code)));
}
Node ShaderIR::Comment(const std::string& text) {
return StoreNode(CommentNode(text));
}
Node ShaderIR::Immediate(u32 value) {
return StoreNode(ImmediateNode(value));
}
Node ShaderIR::GetRegister(Register reg) {
if (reg != Register::ZeroIndex) {
used_registers.insert(static_cast<u32>(reg));
}
return StoreNode(GprNode(reg));
}
Node ShaderIR::GetImmediate19(Instruction instr) {
return Immediate(instr.alu.GetImm20_19());
}
Node ShaderIR::GetImmediate32(Instruction instr) {
return Immediate(instr.alu.GetImm20_32());
}
Node ShaderIR::GetConstBuffer(u64 index_, u64 offset_) {
const auto index = static_cast<u32>(index_);
const auto offset = static_cast<u32>(offset_);
const auto [entry, is_new] = used_cbufs.try_emplace(index);
entry->second.MarkAsUsed(offset);
return StoreNode(CbufNode(index, Immediate(offset)));
}
Node ShaderIR::GetConstBufferIndirect(u64 index_, u64 offset_, Node node) {
const auto index = static_cast<u32>(index_);
const auto offset = static_cast<u32>(offset_);
const auto [entry, is_new] = used_cbufs.try_emplace(index);
entry->second.MarkAsUsedIndirect();
const Node final_offset = Operation(OperationCode::UAdd, NO_PRECISE, node, Immediate(offset));
return StoreNode(CbufNode(index, final_offset));
}
Node ShaderIR::GetPredicate(u64 pred_, bool negated) {
const auto pred = static_cast<Pred>(pred_);
if (pred != Pred::UnusedIndex && pred != Pred::NeverExecute) {
used_predicates.insert(pred);
}
return StoreNode(PredicateNode(pred, negated));
}
Node ShaderIR::GetPredicate(bool immediate) {
return GetPredicate(static_cast<u64>(immediate ? Pred::UnusedIndex : Pred::NeverExecute));
}
Node ShaderIR::GetInputAttribute(Attribute::Index index, u64 element,
const Tegra::Shader::IpaMode& input_mode, Node buffer) {
const auto [entry, is_new] =
used_input_attributes.emplace(std::make_pair(index, std::set<Tegra::Shader::IpaMode>{}));
entry->second.insert(input_mode);
return StoreNode(AbufNode(index, static_cast<u32>(element), input_mode, buffer));
}
Node ShaderIR::GetOutputAttribute(Attribute::Index index, u64 element, Node buffer) {
if (index == Attribute::Index::ClipDistances0123 ||
index == Attribute::Index::ClipDistances4567) {
const auto clip_index =
static_cast<u32>((index == Attribute::Index::ClipDistances4567 ? 1 : 0) + element);
used_clip_distances.at(clip_index) = true;
}
used_output_attributes.insert(index);
return StoreNode(AbufNode(index, static_cast<u32>(element), buffer));
}
Node ShaderIR::GetInternalFlag(InternalFlag flag, bool negated) {
const Node node = StoreNode(InternalFlagNode(flag));
if (negated) {
return Operation(OperationCode::LogicalNegate, node);
}
return node;
}
Node ShaderIR::GetLocalMemory(Node address) {
return StoreNode(LmemNode(address));
}
Node ShaderIR::GetTemporal(u32 id) {
return GetRegister(Register::ZeroIndex + 1 + id);
}
Node ShaderIR::GetOperandAbsNegFloat(Node value, bool absolute, bool negate) {
if (absolute) {
value = Operation(OperationCode::FAbsolute, NO_PRECISE, value);
}
if (negate) {
value = Operation(OperationCode::FNegate, NO_PRECISE, value);
}
return value;
}
Node ShaderIR::GetSaturatedFloat(Node value, bool saturate) {
if (!saturate) {
return value;
}
const Node positive_zero = Immediate(std::copysignf(0, 1));
const Node positive_one = Immediate(1.0f);
return Operation(OperationCode::FClamp, NO_PRECISE, value, positive_zero, positive_one);
}
Node ShaderIR::ConvertIntegerSize(Node value, Tegra::Shader::Register::Size size, bool is_signed) {
switch (size) {
case Register::Size::Byte:
value = SignedOperation(OperationCode::ILogicalShiftLeft, is_signed, NO_PRECISE, value,
Immediate(24));
value = SignedOperation(OperationCode::IArithmeticShiftRight, is_signed, NO_PRECISE, value,
Immediate(24));
return value;
case Register::Size::Short:
value = SignedOperation(OperationCode::ILogicalShiftLeft, is_signed, NO_PRECISE, value,
Immediate(16));
value = SignedOperation(OperationCode::IArithmeticShiftRight, is_signed, NO_PRECISE, value,
Immediate(16));
case Register::Size::Word:
// Default - do nothing
return value;
default:
UNREACHABLE_MSG("Unimplemented conversion size: {}", static_cast<u32>(size));
return value;
}
}
Node ShaderIR::GetOperandAbsNegInteger(Node value, bool absolute, bool negate, bool is_signed) {
if (!is_signed) {
// Absolute or negate on an unsigned is pointless
return value;
}
if (absolute) {
value = Operation(OperationCode::IAbsolute, NO_PRECISE, value);
}
if (negate) {
value = Operation(OperationCode::INegate, NO_PRECISE, value);
}
return value;
}
Node ShaderIR::UnpackHalfImmediate(Instruction instr, bool has_negation) {
const Node value = Immediate(instr.half_imm.PackImmediates());
if (!has_negation) {
return value;
}
const Node first_negate = GetPredicate(instr.half_imm.first_negate != 0);
const Node second_negate = GetPredicate(instr.half_imm.second_negate != 0);
return Operation(OperationCode::HNegate, HALF_NO_PRECISE, value, first_negate, second_negate);
}
Node ShaderIR::HalfMerge(Node dest, Node src, Tegra::Shader::HalfMerge merge) {
switch (merge) {
case Tegra::Shader::HalfMerge::H0_H1:
return src;
case Tegra::Shader::HalfMerge::F32:
return Operation(OperationCode::HMergeF32, src);
case Tegra::Shader::HalfMerge::Mrg_H0:
return Operation(OperationCode::HMergeH0, dest, src);
case Tegra::Shader::HalfMerge::Mrg_H1:
return Operation(OperationCode::HMergeH1, dest, src);
}
UNREACHABLE();
return src;
}
Node ShaderIR::GetOperandAbsNegHalf(Node value, bool absolute, bool negate) {
if (absolute) {
value = Operation(OperationCode::HAbsolute, HALF_NO_PRECISE, value);
}
if (negate) {
value = Operation(OperationCode::HNegate, HALF_NO_PRECISE, value, GetPredicate(true),
GetPredicate(true));
}
return value;
}
Node ShaderIR::GetPredicateComparisonFloat(PredCondition condition, Node op_a, Node op_b) {
static const std::unordered_map<PredCondition, OperationCode> PredicateComparisonTable = {
{PredCondition::LessThan, OperationCode::LogicalFLessThan},
{PredCondition::Equal, OperationCode::LogicalFEqual},
{PredCondition::LessEqual, OperationCode::LogicalFLessEqual},
{PredCondition::GreaterThan, OperationCode::LogicalFGreaterThan},
{PredCondition::NotEqual, OperationCode::LogicalFNotEqual},
{PredCondition::GreaterEqual, OperationCode::LogicalFGreaterEqual},
{PredCondition::LessThanWithNan, OperationCode::LogicalFLessThan},
{PredCondition::NotEqualWithNan, OperationCode::LogicalFNotEqual},
{PredCondition::LessEqualWithNan, OperationCode::LogicalFLessEqual},
{PredCondition::GreaterThanWithNan, OperationCode::LogicalFGreaterThan},
{PredCondition::GreaterEqualWithNan, OperationCode::LogicalFGreaterEqual}};
const auto comparison{PredicateComparisonTable.find(condition)};
UNIMPLEMENTED_IF_MSG(comparison == PredicateComparisonTable.end(),
"Unknown predicate comparison operation");
Node predicate = Operation(comparison->second, NO_PRECISE, op_a, op_b);
if (condition == PredCondition::LessThanWithNan ||
condition == PredCondition::NotEqualWithNan ||
condition == PredCondition::LessEqualWithNan ||
condition == PredCondition::GreaterThanWithNan ||
condition == PredCondition::GreaterEqualWithNan) {
predicate = Operation(OperationCode::LogicalOr, predicate,
Operation(OperationCode::LogicalFIsNan, op_a));
predicate = Operation(OperationCode::LogicalOr, predicate,
Operation(OperationCode::LogicalFIsNan, op_b));
}
return predicate;
}
Node ShaderIR::GetPredicateComparisonInteger(PredCondition condition, bool is_signed, Node op_a,
Node op_b) {
static const std::unordered_map<PredCondition, OperationCode> PredicateComparisonTable = {
{PredCondition::LessThan, OperationCode::LogicalILessThan},
{PredCondition::Equal, OperationCode::LogicalIEqual},
{PredCondition::LessEqual, OperationCode::LogicalILessEqual},
{PredCondition::GreaterThan, OperationCode::LogicalIGreaterThan},
{PredCondition::NotEqual, OperationCode::LogicalINotEqual},
{PredCondition::GreaterEqual, OperationCode::LogicalIGreaterEqual},
{PredCondition::LessThanWithNan, OperationCode::LogicalILessThan},
{PredCondition::NotEqualWithNan, OperationCode::LogicalINotEqual},
{PredCondition::LessEqualWithNan, OperationCode::LogicalILessEqual},
{PredCondition::GreaterThanWithNan, OperationCode::LogicalIGreaterThan},
{PredCondition::GreaterEqualWithNan, OperationCode::LogicalIGreaterEqual}};
const auto comparison{PredicateComparisonTable.find(condition)};
UNIMPLEMENTED_IF_MSG(comparison == PredicateComparisonTable.end(),
"Unknown predicate comparison operation");
Node predicate = SignedOperation(comparison->second, is_signed, NO_PRECISE, op_a, op_b);
UNIMPLEMENTED_IF_MSG(condition == PredCondition::LessThanWithNan ||
condition == PredCondition::NotEqualWithNan ||
condition == PredCondition::LessEqualWithNan ||
condition == PredCondition::GreaterThanWithNan ||
condition == PredCondition::GreaterEqualWithNan,
"NaN comparisons for integers are not implemented");
return predicate;
}
Node ShaderIR::GetPredicateComparisonHalf(Tegra::Shader::PredCondition condition,
const MetaHalfArithmetic& meta, Node op_a, Node op_b) {
UNIMPLEMENTED_IF_MSG(condition == PredCondition::LessThanWithNan ||
condition == PredCondition::NotEqualWithNan ||
condition == PredCondition::LessEqualWithNan ||
condition == PredCondition::GreaterThanWithNan ||
condition == PredCondition::GreaterEqualWithNan,
"Unimplemented NaN comparison for half floats");
static const std::unordered_map<PredCondition, OperationCode> PredicateComparisonTable = {
{PredCondition::LessThan, OperationCode::Logical2HLessThan},
{PredCondition::Equal, OperationCode::Logical2HEqual},
{PredCondition::LessEqual, OperationCode::Logical2HLessEqual},
{PredCondition::GreaterThan, OperationCode::Logical2HGreaterThan},
{PredCondition::NotEqual, OperationCode::Logical2HNotEqual},
{PredCondition::GreaterEqual, OperationCode::Logical2HGreaterEqual},
{PredCondition::LessThanWithNan, OperationCode::Logical2HLessThan},
{PredCondition::NotEqualWithNan, OperationCode::Logical2HNotEqual},
{PredCondition::LessEqualWithNan, OperationCode::Logical2HLessEqual},
{PredCondition::GreaterThanWithNan, OperationCode::Logical2HGreaterThan},
{PredCondition::GreaterEqualWithNan, OperationCode::Logical2HGreaterEqual}};
const auto comparison{PredicateComparisonTable.find(condition)};
UNIMPLEMENTED_IF_MSG(comparison == PredicateComparisonTable.end(),
"Unknown predicate comparison operation");
const Node predicate = Operation(comparison->second, meta, op_a, op_b);
return predicate;
}
OperationCode ShaderIR::GetPredicateCombiner(PredOperation operation) {
static const std::unordered_map<PredOperation, OperationCode> PredicateOperationTable = {
{PredOperation::And, OperationCode::LogicalAnd},
{PredOperation::Or, OperationCode::LogicalOr},
{PredOperation::Xor, OperationCode::LogicalXor},
};
const auto op = PredicateOperationTable.find(operation);
UNIMPLEMENTED_IF_MSG(op == PredicateOperationTable.end(), "Unknown predicate operation");
return op->second;
}
Node ShaderIR::GetConditionCode(Tegra::Shader::ConditionCode cc) {
switch (cc) {
case Tegra::Shader::ConditionCode::NEU:
return GetInternalFlag(InternalFlag::Zero, true);
default:
UNIMPLEMENTED_MSG("Unimplemented condition code: {}", static_cast<u32>(cc));
return GetPredicate(static_cast<u64>(Pred::NeverExecute));
}
}
void ShaderIR::SetRegister(BasicBlock& bb, Register dest, Node src) {
bb.push_back(Operation(OperationCode::Assign, GetRegister(dest), src));
}
void ShaderIR::SetPredicate(BasicBlock& bb, u64 dest, Node src) {
bb.push_back(Operation(OperationCode::LogicalAssign, GetPredicate(dest), src));
}
void ShaderIR::SetInternalFlag(BasicBlock& bb, InternalFlag flag, Node value) {
bb.push_back(Operation(OperationCode::LogicalAssign, GetInternalFlag(flag), value));
}
void ShaderIR::SetLocalMemory(BasicBlock& bb, Node address, Node value) {
bb.push_back(Operation(OperationCode::Assign, GetLocalMemory(address), value));
}
void ShaderIR::SetTemporal(BasicBlock& bb, u32 id, Node value) {
SetRegister(bb, Register::ZeroIndex + 1 + id, value);
}
void ShaderIR::SetInternalFlagsFromFloat(BasicBlock& bb, Node value, bool sets_cc) {
if (!sets_cc) {
return;
}
const Node zerop = Operation(OperationCode::LogicalFEqual, value, Immediate(0.0f));
SetInternalFlag(bb, InternalFlag::Zero, zerop);
LOG_WARNING(HW_GPU, "Condition codes implementation is incomplete");
}
void ShaderIR::SetInternalFlagsFromInteger(BasicBlock& bb, Node value, bool sets_cc) {
if (!sets_cc) {
return;
}
const Node zerop = Operation(OperationCode::LogicalIEqual, value, Immediate(0));
SetInternalFlag(bb, InternalFlag::Zero, zerop);
LOG_WARNING(HW_GPU, "Condition codes implementation is incomplete");
}
Node ShaderIR::BitfieldExtract(Node value, u32 offset, u32 bits) {
return Operation(OperationCode::UBitfieldExtract, NO_PRECISE, value, Immediate(offset),
Immediate(bits));
}
/*static*/ OperationCode ShaderIR::SignedToUnsignedCode(OperationCode operation_code,
bool is_signed) {
if (is_signed) {
return operation_code;
}
switch (operation_code) {
case OperationCode::FCastInteger:
return OperationCode::FCastUInteger;
case OperationCode::IAdd:
return OperationCode::UAdd;
case OperationCode::IMul:
return OperationCode::UMul;
case OperationCode::IDiv:
return OperationCode::UDiv;
case OperationCode::IMin:
return OperationCode::UMin;
case OperationCode::IMax:
return OperationCode::UMax;
case OperationCode::ICastFloat:
return OperationCode::UCastFloat;
case OperationCode::ICastUnsigned:
return OperationCode::UCastSigned;
case OperationCode::ILogicalShiftLeft:
return OperationCode::ULogicalShiftLeft;
case OperationCode::ILogicalShiftRight:
return OperationCode::ULogicalShiftRight;
case OperationCode::IArithmeticShiftRight:
return OperationCode::UArithmeticShiftRight;
case OperationCode::IBitwiseAnd:
return OperationCode::UBitwiseAnd;
case OperationCode::IBitwiseOr:
return OperationCode::UBitwiseOr;
case OperationCode::IBitwiseXor:
return OperationCode::UBitwiseXor;
case OperationCode::IBitwiseNot:
return OperationCode::UBitwiseNot;
case OperationCode::IBitfieldInsert:
return OperationCode::UBitfieldInsert;
case OperationCode::IBitCount:
return OperationCode::UBitCount;
case OperationCode::LogicalILessThan:
return OperationCode::LogicalULessThan;
case OperationCode::LogicalIEqual:
return OperationCode::LogicalUEqual;
case OperationCode::LogicalILessEqual:
return OperationCode::LogicalULessEqual;
case OperationCode::LogicalIGreaterThan:
return OperationCode::LogicalUGreaterThan;
case OperationCode::LogicalINotEqual:
return OperationCode::LogicalUNotEqual;
case OperationCode::LogicalIGreaterEqual:
return OperationCode::LogicalUGreaterEqual;
case OperationCode::INegate:
UNREACHABLE_MSG("Can't negate an unsigned integer");
case OperationCode::IAbsolute:
UNREACHABLE_MSG("Can't apply absolute to an unsigned integer");
}
UNREACHABLE_MSG("Unknown signed operation with code={}", static_cast<u32>(operation_code));
return {};
}
} // namespace VideoCommon::Shader

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src/video_core/shader/shader_ir.h Normal file
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// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <cstring>
#include <map>
#include <set>
#include <string>
#include <tuple>
#include <variant>
#include <vector>
#include "common/common_types.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/engines/shader_header.h"
namespace VideoCommon::Shader {
class OperationNode;
class ConditionalNode;
class GprNode;
class ImmediateNode;
class InternalFlagNode;
class PredicateNode;
class AbufNode; ///< Attribute buffer
class CbufNode; ///< Constant buffer
class LmemNode; ///< Local memory
class GmemNode; ///< Global memory
class CommentNode;
using ProgramCode = std::vector<u64>;
using NodeData =
std::variant<OperationNode, ConditionalNode, GprNode, ImmediateNode, InternalFlagNode,
PredicateNode, AbufNode, CbufNode, LmemNode, GmemNode, CommentNode>;
using Node = const NodeData*;
using Node4 = std::array<Node, 4>;
using BasicBlock = std::vector<Node>;
constexpr u32 MAX_PROGRAM_LENGTH = 0x1000;
enum class OperationCode {
Assign, /// (float& dest, float src) -> void
Select, /// (MetaArithmetic, bool pred, float a, float b) -> float
FAdd, /// (MetaArithmetic, float a, float b) -> float
FMul, /// (MetaArithmetic, float a, float b) -> float
FDiv, /// (MetaArithmetic, float a, float b) -> float
FFma, /// (MetaArithmetic, float a, float b, float c) -> float
FNegate, /// (MetaArithmetic, float a) -> float
FAbsolute, /// (MetaArithmetic, float a) -> float
FClamp, /// (MetaArithmetic, float value, float min, float max) -> float
FMin, /// (MetaArithmetic, float a, float b) -> float
FMax, /// (MetaArithmetic, float a, float b) -> float
FCos, /// (MetaArithmetic, float a) -> float
FSin, /// (MetaArithmetic, float a) -> float
FExp2, /// (MetaArithmetic, float a) -> float
FLog2, /// (MetaArithmetic, float a) -> float
FInverseSqrt, /// (MetaArithmetic, float a) -> float
FSqrt, /// (MetaArithmetic, float a) -> float
FRoundEven, /// (MetaArithmetic, float a) -> float
FFloor, /// (MetaArithmetic, float a) -> float
FCeil, /// (MetaArithmetic, float a) -> float
FTrunc, /// (MetaArithmetic, float a) -> float
FCastInteger, /// (MetaArithmetic, int a) -> float
FCastUInteger, /// (MetaArithmetic, uint a) -> float
IAdd, /// (MetaArithmetic, int a, int b) -> int
IMul, /// (MetaArithmetic, int a, int b) -> int
IDiv, /// (MetaArithmetic, int a, int b) -> int
INegate, /// (MetaArithmetic, int a) -> int
IAbsolute, /// (MetaArithmetic, int a) -> int
IMin, /// (MetaArithmetic, int a, int b) -> int
IMax, /// (MetaArithmetic, int a, int b) -> int
ICastFloat, /// (MetaArithmetic, float a) -> int
ICastUnsigned, /// (MetaArithmetic, uint a) -> int
ILogicalShiftLeft, /// (MetaArithmetic, int a, uint b) -> int
ILogicalShiftRight, /// (MetaArithmetic, int a, uint b) -> int
IArithmeticShiftRight, /// (MetaArithmetic, int a, uint b) -> int
IBitwiseAnd, /// (MetaArithmetic, int a, int b) -> int
IBitwiseOr, /// (MetaArithmetic, int a, int b) -> int
IBitwiseXor, /// (MetaArithmetic, int a, int b) -> int
IBitwiseNot, /// (MetaArithmetic, int a) -> int
IBitfieldInsert, /// (MetaArithmetic, int base, int insert, int offset, int bits) -> int
IBitfieldExtract, /// (MetaArithmetic, int value, int offset, int offset) -> int
IBitCount, /// (MetaArithmetic, int) -> int
UAdd, /// (MetaArithmetic, uint a, uint b) -> uint
UMul, /// (MetaArithmetic, uint a, uint b) -> uint
UDiv, /// (MetaArithmetic, uint a, uint b) -> uint
UMin, /// (MetaArithmetic, uint a, uint b) -> uint
UMax, /// (MetaArithmetic, uint a, uint b) -> uint
UCastFloat, /// (MetaArithmetic, float a) -> uint
UCastSigned, /// (MetaArithmetic, int a) -> uint
ULogicalShiftLeft, /// (MetaArithmetic, uint a, uint b) -> uint
ULogicalShiftRight, /// (MetaArithmetic, uint a, uint b) -> uint
UArithmeticShiftRight, /// (MetaArithmetic, uint a, uint b) -> uint
UBitwiseAnd, /// (MetaArithmetic, uint a, uint b) -> uint
UBitwiseOr, /// (MetaArithmetic, uint a, uint b) -> uint
UBitwiseXor, /// (MetaArithmetic, uint a, uint b) -> uint
UBitwiseNot, /// (MetaArithmetic, uint a) -> uint
UBitfieldInsert, /// (MetaArithmetic, uint base, uint insert, int offset, int bits) -> uint
UBitfieldExtract, /// (MetaArithmetic, uint value, int offset, int offset) -> uint
UBitCount, /// (MetaArithmetic, uint) -> uint
HAdd, /// (MetaHalfArithmetic, f16vec2 a, f16vec2 b) -> f16vec2
HMul, /// (MetaHalfArithmetic, f16vec2 a, f16vec2 b) -> f16vec2
HFma, /// (MetaHalfArithmetic, f16vec2 a, f16vec2 b, f16vec2 c) -> f16vec2
HAbsolute, /// (f16vec2 a) -> f16vec2
HNegate, /// (f16vec2 a, bool first, bool second) -> f16vec2
HMergeF32, /// (f16vec2 src) -> float
HMergeH0, /// (f16vec2 dest, f16vec2 src) -> f16vec2
HMergeH1, /// (f16vec2 dest, f16vec2 src) -> f16vec2
HPack2, /// (float a, float b) -> f16vec2
LogicalAssign, /// (bool& dst, bool src) -> void
LogicalAnd, /// (bool a, bool b) -> bool
LogicalOr, /// (bool a, bool b) -> bool
LogicalXor, /// (bool a, bool b) -> bool
LogicalNegate, /// (bool a) -> bool
LogicalPick2, /// (bool2 pair, uint index) -> bool
LogicalAll2, /// (bool2 a) -> bool
LogicalAny2, /// (bool2 a) -> bool
LogicalFLessThan, /// (float a, float b) -> bool
LogicalFEqual, /// (float a, float b) -> bool
LogicalFLessEqual, /// (float a, float b) -> bool
LogicalFGreaterThan, /// (float a, float b) -> bool
LogicalFNotEqual, /// (float a, float b) -> bool
LogicalFGreaterEqual, /// (float a, float b) -> bool
LogicalFIsNan, /// (float a) -> bool
LogicalILessThan, /// (int a, int b) -> bool
LogicalIEqual, /// (int a, int b) -> bool
LogicalILessEqual, /// (int a, int b) -> bool
LogicalIGreaterThan, /// (int a, int b) -> bool
LogicalINotEqual, /// (int a, int b) -> bool
LogicalIGreaterEqual, /// (int a, int b) -> bool
LogicalULessThan, /// (uint a, uint b) -> bool
LogicalUEqual, /// (uint a, uint b) -> bool
LogicalULessEqual, /// (uint a, uint b) -> bool
LogicalUGreaterThan, /// (uint a, uint b) -> bool
LogicalUNotEqual, /// (uint a, uint b) -> bool
LogicalUGreaterEqual, /// (uint a, uint b) -> bool
Logical2HLessThan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HLessEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HGreaterThan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HNotEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HGreaterEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
F4Texture, /// (MetaTexture, float[N] coords, float[M] params) -> float4
F4TextureLod, /// (MetaTexture, float[N] coords, float[M] params) -> float4
F4TextureGather, /// (MetaTexture, float[N] coords, float[M] params) -> float4
F4TextureQueryDimensions, /// (MetaTexture, float a) -> float4
F4TextureQueryLod, /// (MetaTexture, float[N] coords) -> float4
F4TexelFetch, /// (MetaTexture, int[N], int) -> float4
Branch, /// (uint branch_target) -> void
PushFlowStack, /// (uint branch_target) -> void
PopFlowStack, /// () -> void
Exit, /// () -> void
Discard, /// () -> void
EmitVertex, /// () -> void
EndPrimitive, /// () -> void
YNegate, /// () -> float
Amount,
};
enum class InternalFlag {
Zero = 0,
Sign = 1,
Carry = 2,
Overflow = 3,
Amount = 4,
};
/// Describes the behaviour of code path of a given entry point and a return point.
enum class ExitMethod {
Undetermined, ///< Internal value. Only occur when analyzing JMP loop.
AlwaysReturn, ///< All code paths reach the return point.
Conditional, ///< Code path reaches the return point or an END instruction conditionally.
AlwaysEnd, ///< All code paths reach a END instruction.
};
class Sampler {
public:
explicit Sampler(std::size_t offset, std::size_t index, Tegra::Shader::TextureType type,
bool is_array, bool is_shadow)
: offset{offset}, index{index}, type{type}, is_array{is_array}, is_shadow{is_shadow} {}
std::size_t GetOffset() const {
return offset;
}
std::size_t GetIndex() const {
return index;
}
Tegra::Shader::TextureType GetType() const {
return type;
}
bool IsArray() const {
return is_array;
}
bool IsShadow() const {
return is_shadow;
}
bool operator<(const Sampler& rhs) const {
return std::tie(offset, index, type, is_array, is_shadow) <
std::tie(rhs.offset, rhs.index, rhs.type, rhs.is_array, rhs.is_shadow);
}
private:
/// Offset in TSC memory from which to read the sampler object, as specified by the sampling
/// instruction.
std::size_t offset{};
std::size_t index{}; ///< Value used to index into the generated GLSL sampler array.
Tegra::Shader::TextureType type{}; ///< The type used to sample this texture (Texture2D, etc)
bool is_array{}; ///< Whether the texture is being sampled as an array texture or not.
bool is_shadow{}; ///< Whether the texture is being sampled as a depth texture or not.
};
class ConstBuffer {
public:
void MarkAsUsed(u64 offset) {
max_offset = std::max(max_offset, static_cast<u32>(offset));
}
void MarkAsUsedIndirect() {
is_indirect = true;
}
bool IsIndirect() const {
return is_indirect;
}
u32 GetSize() const {
return max_offset + 1;
}
private:
u32 max_offset{};
bool is_indirect{};
};
struct MetaArithmetic {
bool precise{};
};
struct MetaHalfArithmetic {
bool precise{};
std::array<Tegra::Shader::HalfType, 3> types = {Tegra::Shader::HalfType::H0_H1,
Tegra::Shader::HalfType::H0_H1,
Tegra::Shader::HalfType::H0_H1};
};
struct MetaTexture {
const Sampler& sampler;
u32 element{};
u32 coords_count{};
std::optional<u32> array_index;
};
constexpr MetaArithmetic PRECISE = {true};
constexpr MetaArithmetic NO_PRECISE = {false};
constexpr MetaHalfArithmetic HALF_NO_PRECISE = {false};
using Meta = std::variant<MetaArithmetic, MetaHalfArithmetic, MetaTexture>;
/// Holds any kind of operation that can be done in the IR
class OperationNode final {
public:
template <typename... T>
explicit constexpr OperationNode(OperationCode code) : code{code}, meta{} {}
template <typename... T>
explicit constexpr OperationNode(OperationCode code, Meta&& meta)
: code{code}, meta{std::move(meta)} {}
template <typename... T>
explicit constexpr OperationNode(OperationCode code, const T*... operands)
: OperationNode(code, {}, operands...) {}
template <typename... T>
explicit constexpr OperationNode(OperationCode code, Meta&& meta, const T*... operands_)
: code{code}, meta{std::move(meta)} {
auto operands_list = {operands_...};
for (auto& operand : operands_list) {
operands.push_back(operand);
}
}
explicit OperationNode(OperationCode code, Meta&& meta, std::vector<Node>&& operands)
: code{code}, meta{meta}, operands{std::move(operands)} {}
explicit OperationNode(OperationCode code, std::vector<Node>&& operands)
: code{code}, meta{}, operands{std::move(operands)} {}
OperationCode GetCode() const {
return code;
}
const Meta& GetMeta() const {
return meta;
}
std::size_t GetOperandsCount() const {
return operands.size();
}
Node operator[](std::size_t operand_index) const {
return operands.at(operand_index);
}
private:
const OperationCode code;
const Meta meta;
std::vector<Node> operands;
};
/// Encloses inside any kind of node that returns a boolean conditionally-executed code
class ConditionalNode final {
public:
explicit ConditionalNode(Node condition, std::vector<Node>&& code)
: condition{condition}, code{std::move(code)} {}
Node GetCondition() const {
return condition;
}
const std::vector<Node>& GetCode() const {
return code;
}
private:
const Node condition; ///< Condition to be satisfied
std::vector<Node> code; ///< Code to execute
};
/// A general purpose register
class GprNode final {
public:
explicit constexpr GprNode(Tegra::Shader::Register index) : index{index} {}
u32 GetIndex() const {
return static_cast<u32>(index);
}
private:
const Tegra::Shader::Register index;
};
/// A 32-bits value that represents an immediate value
class ImmediateNode final {
public:
explicit constexpr ImmediateNode(u32 value) : value{value} {}
u32 GetValue() const {
return value;
}
private:
const u32 value;
};
/// One of Maxwell's internal flags
class InternalFlagNode final {
public:
explicit constexpr InternalFlagNode(InternalFlag flag) : flag{flag} {}
InternalFlag GetFlag() const {
return flag;
}
private:
const InternalFlag flag;
};
/// A predicate register, it can be negated without aditional nodes
class PredicateNode final {
public:
explicit constexpr PredicateNode(Tegra::Shader::Pred index, bool negated)
: index{index}, negated{negated} {}
Tegra::Shader::Pred GetIndex() const {
return index;
}
bool IsNegated() const {
return negated;
}
private:
const Tegra::Shader::Pred index;
const bool negated;
};
/// Attribute buffer memory (known as attributes or varyings in GLSL terms)
class AbufNode final {
public:
explicit constexpr AbufNode(Tegra::Shader::Attribute::Index index, u32 element,
const Tegra::Shader::IpaMode& input_mode, Node buffer = {})
: input_mode{input_mode}, index{index}, element{element}, buffer{buffer} {}
explicit constexpr AbufNode(Tegra::Shader::Attribute::Index index, u32 element,
Node buffer = {})
: input_mode{}, index{index}, element{element}, buffer{buffer} {}
Tegra::Shader::IpaMode GetInputMode() const {
return input_mode;
}
Tegra::Shader::Attribute::Index GetIndex() const {
return index;
}
u32 GetElement() const {
return element;
}
Node GetBuffer() const {
return buffer;
}
private:
const Tegra::Shader::IpaMode input_mode;
const Node buffer;
const Tegra::Shader::Attribute::Index index;
const u32 element;
};
/// Constant buffer node, usually mapped to uniform buffers in GLSL
class CbufNode final {
public:
explicit constexpr CbufNode(u32 index, Node offset) : index{index}, offset{offset} {}
u32 GetIndex() const {
return index;
}
Node GetOffset() const {
return offset;
}
private:
const u32 index;
const Node offset;
};
/// Local memory node
class LmemNode final {
public:
explicit constexpr LmemNode(Node address) : address{address} {}
Node GetAddress() const {
return address;
}
private:
const Node address;
};
/// Global memory node
class GmemNode final {
public:
explicit constexpr GmemNode(Node address) : address{address} {}
Node GetAddress() const {
return address;
}
private:
const Node address;
};
/// Commentary, can be dropped
class CommentNode final {
public:
explicit CommentNode(std::string text) : text{std::move(text)} {}
const std::string& GetText() const {
return text;
}
private:
std::string text;
};
class ShaderIR final {
public:
explicit ShaderIR(const ProgramCode& program_code, u32 main_offset)
: program_code{program_code}, main_offset{main_offset} {
Decode();
}
const std::map<u32, BasicBlock>& GetBasicBlocks() const {
return basic_blocks;
}
const std::set<u32>& GetRegisters() const {
return used_registers;
}
const std::set<Tegra::Shader::Pred>& GetPredicates() const {
return used_predicates;
}
const std::map<Tegra::Shader::Attribute::Index, std::set<Tegra::Shader::IpaMode>>&
GetInputAttributes() const {
return used_input_attributes;
}
const std::set<Tegra::Shader::Attribute::Index>& GetOutputAttributes() const {
return used_output_attributes;
}
const std::map<u32, ConstBuffer>& GetConstantBuffers() const {
return used_cbufs;
}
const std::set<Sampler>& GetSamplers() const {
return used_samplers;
}
const std::array<bool, Tegra::Engines::Maxwell3D::Regs::NumClipDistances>& GetClipDistances()
const {
return used_clip_distances;
}
std::size_t GetLength() const {
return static_cast<std::size_t>(coverage_end * sizeof(u64));
}
const Tegra::Shader::Header& GetHeader() const {
return header;
}
private:
void Decode();
ExitMethod Scan(u32 begin, u32 end, std::set<u32>& labels);
BasicBlock DecodeRange(u32 begin, u32 end);
/**
* Decodes a single instruction from Tegra to IR.
* @param bb Basic block where the nodes will be written to.
* @param pc Program counter. Offset to decode.
* @return Next address to decode.
*/
u32 DecodeInstr(BasicBlock& bb, u32 pc);
u32 DecodeArithmetic(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeArithmeticImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeBfe(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeBfi(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeShift(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeArithmeticInteger(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeArithmeticIntegerImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeArithmeticHalf(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeArithmeticHalfImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeFfma(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeHfma2(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeConversion(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeMemory(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeFloatSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeIntegerSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeHalfSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodePredicateSetRegister(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodePredicateSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeRegisterSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeFloatSet(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeIntegerSet(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeHalfSet(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeVideo(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeXmad(BasicBlock& bb, const BasicBlock& code, u32 pc);
u32 DecodeOther(BasicBlock& bb, const BasicBlock& code, u32 pc);
/// Internalizes node's data and returns a managed pointer to a clone of that node
Node StoreNode(NodeData&& node_data);
/// Creates a conditional node
Node Conditional(Node condition, std::vector<Node>&& code);
/// Creates a commentary
Node Comment(const std::string& text);
/// Creates an u32 immediate
Node Immediate(u32 value);
/// Creates a s32 immediate
Node Immediate(s32 value) {
return Immediate(static_cast<u32>(value));
}
/// Creates a f32 immediate
Node Immediate(f32 value) {
u32 integral;
std::memcpy(&integral, &value, sizeof(u32));
return Immediate(integral);
}
/// Generates a node for a passed register.
Node GetRegister(Tegra::Shader::Register reg);
/// Generates a node representing a 19-bit immediate value
Node GetImmediate19(Tegra::Shader::Instruction instr);
/// Generates a node representing a 32-bit immediate value
Node GetImmediate32(Tegra::Shader::Instruction instr);
/// Generates a node representing a constant buffer
Node GetConstBuffer(u64 index, u64 offset);
/// Generates a node representing a constant buffer with a variadic offset
Node GetConstBufferIndirect(u64 index, u64 offset, Node node);
/// Generates a node for a passed predicate. It can be optionally negated
Node GetPredicate(u64 pred, bool negated = false);
/// Generates a predicate node for an immediate true or false value
Node GetPredicate(bool immediate);
/// Generates a node representing an input atttribute. Keeps track of used attributes.
Node GetInputAttribute(Tegra::Shader::Attribute::Index index, u64 element,
const Tegra::Shader::IpaMode& input_mode, Node buffer = {});
/// Generates a node representing an output atttribute. Keeps track of used attributes.
Node GetOutputAttribute(Tegra::Shader::Attribute::Index index, u64 element, Node buffer);
/// Generates a node representing an internal flag
Node GetInternalFlag(InternalFlag flag, bool negated = false);
/// Generates a node representing a local memory address
Node GetLocalMemory(Node address);
/// Generates a temporal, internally it uses a post-RZ register
Node GetTemporal(u32 id);
/// Sets a register. src value must be a number-evaluated node.
void SetRegister(BasicBlock& bb, Tegra::Shader::Register dest, Node src);
/// Sets a predicate. src value must be a bool-evaluated node
void SetPredicate(BasicBlock& bb, u64 dest, Node src);
/// Sets an internal flag. src value must be a bool-evaluated node
void SetInternalFlag(BasicBlock& bb, InternalFlag flag, Node value);
/// Sets a local memory address. address and value must be a number-evaluated node
void SetLocalMemory(BasicBlock& bb, Node address, Node value);
/// Sets a temporal. Internally it uses a post-RZ register
void SetTemporal(BasicBlock& bb, u32 id, Node value);
/// Sets internal flags from a float
void SetInternalFlagsFromFloat(BasicBlock& bb, Node value, bool sets_cc = true);
/// Sets internal flags from an integer
void SetInternalFlagsFromInteger(BasicBlock& bb, Node value, bool sets_cc = true);
/// Conditionally absolute/negated float. Absolute is applied first
Node GetOperandAbsNegFloat(Node value, bool absolute, bool negate);
/// Conditionally saturates a float
Node GetSaturatedFloat(Node value, bool saturate = true);
/// Converts an integer to different sizes.
Node ConvertIntegerSize(Node value, Tegra::Shader::Register::Size size, bool is_signed);
/// Conditionally absolute/negated integer. Absolute is applied first
Node GetOperandAbsNegInteger(Node value, bool absolute, bool negate, bool is_signed);
/// Unpacks a half immediate from an instruction
Node UnpackHalfImmediate(Tegra::Shader::Instruction instr, bool has_negation);
/// Merges a half pair into another value
Node HalfMerge(Node dest, Node src, Tegra::Shader::HalfMerge merge);
/// Conditionally absolute/negated half float pair. Absolute is applied first
Node GetOperandAbsNegHalf(Node value, bool absolute, bool negate);
/// Returns a predicate comparing two floats
Node GetPredicateComparisonFloat(Tegra::Shader::PredCondition condition, Node op_a, Node op_b);
/// Returns a predicate comparing two integers
Node GetPredicateComparisonInteger(Tegra::Shader::PredCondition condition, bool is_signed,
Node op_a, Node op_b);
/// Returns a predicate comparing two half floats. meta consumes how both pairs will be compared
Node GetPredicateComparisonHalf(Tegra::Shader::PredCondition condition,
const MetaHalfArithmetic& meta, Node op_a, Node op_b);
/// Returns a predicate combiner operation
OperationCode GetPredicateCombiner(Tegra::Shader::PredOperation operation);
/// Returns a condition code evaluated from internal flags
Node GetConditionCode(Tegra::Shader::ConditionCode cc);
/// Accesses a texture sampler
const Sampler& GetSampler(const Tegra::Shader::Sampler& sampler,
Tegra::Shader::TextureType type, bool is_array, bool is_shadow);
/// Extracts a sequence of bits from a node
Node BitfieldExtract(Node value, u32 offset, u32 bits);
void WriteTexInstructionFloat(BasicBlock& bb, Tegra::Shader::Instruction instr,
const Node4& components);
void WriteTexsInstructionFloat(BasicBlock& bb, Tegra::Shader::Instruction instr,
const Node4& components);
void WriteTexsInstructionHalfFloat(BasicBlock& bb, Tegra::Shader::Instruction instr,
const Node4& components);
Node4 GetTexCode(Tegra::Shader::Instruction instr, Tegra::Shader::TextureType texture_type,
Tegra::Shader::TextureProcessMode process_mode, bool depth_compare,
bool is_array);
Node4 GetTexsCode(Tegra::Shader::Instruction instr, Tegra::Shader::TextureType texture_type,
Tegra::Shader::TextureProcessMode process_mode, bool depth_compare,
bool is_array);
Node4 GetTld4Code(Tegra::Shader::Instruction instr, Tegra::Shader::TextureType texture_type,
bool depth_compare, bool is_array);
Node4 GetTldsCode(Tegra::Shader::Instruction instr, Tegra::Shader::TextureType texture_type,
bool is_array);
std::tuple<std::size_t, std::size_t> ValidateAndGetCoordinateElement(
Tegra::Shader::TextureType texture_type, bool depth_compare, bool is_array,
bool lod_bias_enabled, std::size_t max_coords, std::size_t max_inputs);
Node4 GetTextureCode(Tegra::Shader::Instruction instr, Tegra::Shader::TextureType texture_type,
Tegra::Shader::TextureProcessMode process_mode, bool depth_compare,
bool is_array, std::size_t array_offset, std::size_t bias_offset,
std::vector<Node>&& coords);
Node GetVideoOperand(Node op, bool is_chunk, bool is_signed, Tegra::Shader::VideoType type,
u64 byte_height);
void WriteLogicOperation(BasicBlock& bb, Tegra::Shader::Register dest,
Tegra::Shader::LogicOperation logic_op, Node op_a, Node op_b,
Tegra::Shader::PredicateResultMode predicate_mode,
Tegra::Shader::Pred predicate, bool sets_cc);
void WriteLop3Instruction(BasicBlock& bb, Tegra::Shader::Register dest, Node op_a, Node op_b,
Node op_c, Node imm_lut, bool sets_cc);
template <typename... T>
Node Operation(OperationCode code, const T*... operands) {
return StoreNode(OperationNode(code, operands...));
}
template <typename... T>
Node Operation(OperationCode code, Meta&& meta, const T*... operands) {
return StoreNode(OperationNode(code, std::move(meta), operands...));
}
template <typename... T>
Node Operation(OperationCode code, std::vector<Node>&& operands) {
return StoreNode(OperationNode(code, std::move(operands)));
}
template <typename... T>
Node Operation(OperationCode code, Meta&& meta, std::vector<Node>&& operands) {
return StoreNode(OperationNode(code, std::move(meta), std::move(operands)));
}
template <typename... T>
Node SignedOperation(OperationCode code, bool is_signed, const T*... operands) {
return StoreNode(OperationNode(SignedToUnsignedCode(code, is_signed), operands...));
}
template <typename... T>
Node SignedOperation(OperationCode code, bool is_signed, Meta&& meta, const T*... operands) {
return StoreNode(
OperationNode(SignedToUnsignedCode(code, is_signed), std::move(meta), operands...));
}
static OperationCode SignedToUnsignedCode(OperationCode operation_code, bool is_signed);
const ProgramCode& program_code;
const u32 main_offset;
u32 coverage_begin{};
u32 coverage_end{};
std::map<std::pair<u32, u32>, ExitMethod> exit_method_map;
std::map<u32, BasicBlock> basic_blocks;
std::vector<std::unique_ptr<NodeData>> stored_nodes;
std::set<u32> used_registers;
std::set<Tegra::Shader::Pred> used_predicates;
std::map<Tegra::Shader::Attribute::Index, std::set<Tegra::Shader::IpaMode>>
used_input_attributes;
std::set<Tegra::Shader::Attribute::Index> used_output_attributes;
std::map<u32, ConstBuffer> used_cbufs;
std::set<Sampler> used_samplers;
std::array<bool, Tegra::Engines::Maxwell3D::Regs::NumClipDistances> used_clip_distances{};
Tegra::Shader::Header header;
};
} // namespace VideoCommon::Shader