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-rw-r--r--src/common/CMakeLists.txt6
-rw-r--r--src/video_core/CMakeLists.txt6
-rw-r--r--src/video_core/renderer_opengl/gl_shader_decompiler.cpp272
-rw-r--r--src/video_core/renderer_opengl/gl_shader_gen.cpp16
-rw-r--r--src/video_core/renderer_vulkan/vk_shader_decompiler.cpp359
-rw-r--r--src/video_core/shader/ast.cpp738
-rw-r--r--src/video_core/shader/ast.h400
-rw-r--r--src/video_core/shader/compiler_settings.cpp26
-rw-r--r--src/video_core/shader/compiler_settings.h26
-rw-r--r--src/video_core/shader/control_flow.cpp155
-rw-r--r--src/video_core/shader/control_flow.h14
-rw-r--r--src/video_core/shader/decode.cpp170
-rw-r--r--src/video_core/shader/expr.cpp93
-rw-r--r--src/video_core/shader/expr.h139
-rw-r--r--src/video_core/shader/shader_ir.cpp12
-rw-r--r--src/video_core/shader/shader_ir.h33
16 files changed, 2306 insertions, 159 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index 5c996fcdb..906c486fd 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -72,9 +72,15 @@ add_custom_command(OUTPUT scm_rev.cpp
"${VIDEO_CORE}/shader/decode/video.cpp"
"${VIDEO_CORE}/shader/decode/warp.cpp"
"${VIDEO_CORE}/shader/decode/xmad.cpp"
+ "${VIDEO_CORE}/shader/ast.cpp"
+ "${VIDEO_CORE}/shader/ast.h"
"${VIDEO_CORE}/shader/control_flow.cpp"
"${VIDEO_CORE}/shader/control_flow.h"
+ "${VIDEO_CORE}/shader/compiler_settings.cpp"
+ "${VIDEO_CORE}/shader/compiler_settings.h"
"${VIDEO_CORE}/shader/decode.cpp"
+ "${VIDEO_CORE}/shader/expr.cpp"
+ "${VIDEO_CORE}/shader/expr.h"
"${VIDEO_CORE}/shader/node.h"
"${VIDEO_CORE}/shader/node_helper.cpp"
"${VIDEO_CORE}/shader/node_helper.h"
diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index e2f85c5f1..eaa694ff8 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -105,9 +105,15 @@ add_library(video_core STATIC
shader/decode/warp.cpp
shader/decode/xmad.cpp
shader/decode/other.cpp
+ shader/ast.cpp
+ shader/ast.h
shader/control_flow.cpp
shader/control_flow.h
+ shader/compiler_settings.cpp
+ shader/compiler_settings.h
shader/decode.cpp
+ shader/expr.cpp
+ shader/expr.h
shader/node_helper.cpp
shader/node_helper.h
shader/node.h
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
index 8fa9e6534..6a610a3bc 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -19,6 +19,7 @@
#include "video_core/renderer_opengl/gl_device.h"
#include "video_core/renderer_opengl/gl_rasterizer.h"
#include "video_core/renderer_opengl/gl_shader_decompiler.h"
+#include "video_core/shader/ast.h"
#include "video_core/shader/node.h"
#include "video_core/shader/shader_ir.h"
@@ -334,39 +335,24 @@ constexpr bool IsVertexShader(ProgramType stage) {
return stage == ProgramType::VertexA || stage == ProgramType::VertexB;
}
+class ASTDecompiler;
+class ExprDecompiler;
+
class GLSLDecompiler final {
public:
explicit GLSLDecompiler(const Device& device, const ShaderIR& ir, ProgramType stage,
std::string suffix)
: device{device}, ir{ir}, stage{stage}, suffix{suffix}, header{ir.GetHeader()} {}
- void Decompile() {
- DeclareVertex();
- DeclareGeometry();
- DeclareRegisters();
- DeclarePredicates();
- DeclareLocalMemory();
- DeclareSharedMemory();
- DeclareInternalFlags();
- DeclareInputAttributes();
- DeclareOutputAttributes();
- DeclareConstantBuffers();
- DeclareGlobalMemory();
- DeclareSamplers();
- DeclarePhysicalAttributeReader();
- DeclareImages();
-
- code.AddLine("void execute_{}() {{", suffix);
- ++code.scope;
-
+ void DecompileBranchMode() {
// VM's program counter
const auto first_address = ir.GetBasicBlocks().begin()->first;
code.AddLine("uint jmp_to = {}U;", first_address);
// TODO(Subv): Figure out the actual depth of the flow stack, for now it seems
// unlikely that shaders will use 20 nested SSYs and PBKs.
+ constexpr u32 FLOW_STACK_SIZE = 20;
if (!ir.IsFlowStackDisabled()) {
- constexpr u32 FLOW_STACK_SIZE = 20;
for (const auto stack : std::array{MetaStackClass::Ssy, MetaStackClass::Pbk}) {
code.AddLine("uint {}[{}];", FlowStackName(stack), FLOW_STACK_SIZE);
code.AddLine("uint {} = 0U;", FlowStackTopName(stack));
@@ -392,10 +378,37 @@ public:
code.AddLine("default: return;");
code.AddLine("}}");
- for (std::size_t i = 0; i < 2; ++i) {
- --code.scope;
- code.AddLine("}}");
+ --code.scope;
+ code.AddLine("}}");
+ }
+
+ void DecompileAST();
+
+ void Decompile() {
+ DeclareVertex();
+ DeclareGeometry();
+ DeclareRegisters();
+ DeclarePredicates();
+ DeclareLocalMemory();
+ DeclareInternalFlags();
+ DeclareInputAttributes();
+ DeclareOutputAttributes();
+ DeclareConstantBuffers();
+ DeclareGlobalMemory();
+ DeclareSamplers();
+ DeclarePhysicalAttributeReader();
+
+ code.AddLine("void execute_{}() {{", suffix);
+ ++code.scope;
+
+ if (ir.IsDecompiled()) {
+ DecompileAST();
+ } else {
+ DecompileBranchMode();
}
+
+ --code.scope;
+ code.AddLine("}}");
}
std::string GetResult() {
@@ -424,6 +437,9 @@ public:
}
private:
+ friend class ASTDecompiler;
+ friend class ExprDecompiler;
+
void DeclareVertex() {
if (!IsVertexShader(stage))
return;
@@ -1821,10 +1837,9 @@ private:
return {};
}
- Expression Exit(Operation operation) {
+ void PreExit() {
if (stage != ProgramType::Fragment) {
- code.AddLine("return;");
- return {};
+ return;
}
const auto& used_registers = ir.GetRegisters();
const auto SafeGetRegister = [&](u32 reg) -> Expression {
@@ -1856,7 +1871,10 @@ private:
// already contains one past the last color register.
code.AddLine("gl_FragDepth = {};", SafeGetRegister(current_reg + 1).AsFloat());
}
+ }
+ Expression Exit(Operation operation) {
+ PreExit();
code.AddLine("return;");
return {};
}
@@ -2253,6 +2271,208 @@ private:
ShaderWriter code;
};
+static constexpr std::string_view flow_var = "flow_var_";
+
+std::string GetFlowVariable(u32 i) {
+ return fmt::format("{}{}", flow_var, i);
+}
+
+class ExprDecompiler {
+public:
+ explicit ExprDecompiler(GLSLDecompiler& decomp) : decomp{decomp} {}
+
+ void operator()(VideoCommon::Shader::ExprAnd& expr) {
+ inner += "( ";
+ std::visit(*this, *expr.operand1);
+ inner += " && ";
+ std::visit(*this, *expr.operand2);
+ inner += ')';
+ }
+
+ void operator()(VideoCommon::Shader::ExprOr& expr) {
+ inner += "( ";
+ std::visit(*this, *expr.operand1);
+ inner += " || ";
+ std::visit(*this, *expr.operand2);
+ inner += ')';
+ }
+
+ void operator()(VideoCommon::Shader::ExprNot& expr) {
+ inner += '!';
+ std::visit(*this, *expr.operand1);
+ }
+
+ void operator()(VideoCommon::Shader::ExprPredicate& expr) {
+ const auto pred = static_cast<Tegra::Shader::Pred>(expr.predicate);
+ inner += decomp.GetPredicate(pred);
+ }
+
+ void operator()(VideoCommon::Shader::ExprCondCode& expr) {
+ const Node cc = decomp.ir.GetConditionCode(expr.cc);
+ std::string target;
+
+ if (const auto pred = std::get_if<PredicateNode>(&*cc)) {
+ const auto index = pred->GetIndex();
+ switch (index) {
+ case Tegra::Shader::Pred::NeverExecute:
+ target = "false";
+ case Tegra::Shader::Pred::UnusedIndex:
+ target = "true";
+ default:
+ target = decomp.GetPredicate(index);
+ }
+ } else if (const auto flag = std::get_if<InternalFlagNode>(&*cc)) {
+ target = decomp.GetInternalFlag(flag->GetFlag());
+ } else {
+ UNREACHABLE();
+ }
+ inner += target;
+ }
+
+ void operator()(VideoCommon::Shader::ExprVar& expr) {
+ inner += GetFlowVariable(expr.var_index);
+ }
+
+ void operator()(VideoCommon::Shader::ExprBoolean& expr) {
+ inner += expr.value ? "true" : "false";
+ }
+
+ std::string& GetResult() {
+ return inner;
+ }
+
+private:
+ std::string inner;
+ GLSLDecompiler& decomp;
+};
+
+class ASTDecompiler {
+public:
+ explicit ASTDecompiler(GLSLDecompiler& decomp) : decomp{decomp} {}
+
+ void operator()(VideoCommon::Shader::ASTProgram& ast) {
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ }
+
+ void operator()(VideoCommon::Shader::ASTIfThen& ast) {
+ ExprDecompiler expr_parser{decomp};
+ std::visit(expr_parser, *ast.condition);
+ decomp.code.AddLine("if ({}) {{", expr_parser.GetResult());
+ decomp.code.scope++;
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ decomp.code.scope--;
+ decomp.code.AddLine("}}");
+ }
+
+ void operator()(VideoCommon::Shader::ASTIfElse& ast) {
+ decomp.code.AddLine("else {{");
+ decomp.code.scope++;
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ decomp.code.scope--;
+ decomp.code.AddLine("}}");
+ }
+
+ void operator()(VideoCommon::Shader::ASTBlockEncoded& ast) {
+ UNREACHABLE();
+ }
+
+ void operator()(VideoCommon::Shader::ASTBlockDecoded& ast) {
+ decomp.VisitBlock(ast.nodes);
+ }
+
+ void operator()(VideoCommon::Shader::ASTVarSet& ast) {
+ ExprDecompiler expr_parser{decomp};
+ std::visit(expr_parser, *ast.condition);
+ decomp.code.AddLine("{} = {};", GetFlowVariable(ast.index), expr_parser.GetResult());
+ }
+
+ void operator()(VideoCommon::Shader::ASTLabel& ast) {
+ decomp.code.AddLine("// Label_{}:", ast.index);
+ }
+
+ void operator()(VideoCommon::Shader::ASTGoto& ast) {
+ UNREACHABLE();
+ }
+
+ void operator()(VideoCommon::Shader::ASTDoWhile& ast) {
+ ExprDecompiler expr_parser{decomp};
+ std::visit(expr_parser, *ast.condition);
+ decomp.code.AddLine("do {{");
+ decomp.code.scope++;
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ decomp.code.scope--;
+ decomp.code.AddLine("}} while({});", expr_parser.GetResult());
+ }
+
+ void operator()(VideoCommon::Shader::ASTReturn& ast) {
+ const bool is_true = VideoCommon::Shader::ExprIsTrue(ast.condition);
+ if (!is_true) {
+ ExprDecompiler expr_parser{decomp};
+ std::visit(expr_parser, *ast.condition);
+ decomp.code.AddLine("if ({}) {{", expr_parser.GetResult());
+ decomp.code.scope++;
+ }
+ if (ast.kills) {
+ decomp.code.AddLine("discard;");
+ } else {
+ decomp.PreExit();
+ decomp.code.AddLine("return;");
+ }
+ if (!is_true) {
+ decomp.code.scope--;
+ decomp.code.AddLine("}}");
+ }
+ }
+
+ void operator()(VideoCommon::Shader::ASTBreak& ast) {
+ const bool is_true = VideoCommon::Shader::ExprIsTrue(ast.condition);
+ if (!is_true) {
+ ExprDecompiler expr_parser{decomp};
+ std::visit(expr_parser, *ast.condition);
+ decomp.code.AddLine("if ({}) {{", expr_parser.GetResult());
+ decomp.code.scope++;
+ }
+ decomp.code.AddLine("break;");
+ if (!is_true) {
+ decomp.code.scope--;
+ decomp.code.AddLine("}}");
+ }
+ }
+
+ void Visit(VideoCommon::Shader::ASTNode& node) {
+ std::visit(*this, *node->GetInnerData());
+ }
+
+private:
+ GLSLDecompiler& decomp;
+};
+
+void GLSLDecompiler::DecompileAST() {
+ const u32 num_flow_variables = ir.GetASTNumVariables();
+ for (u32 i = 0; i < num_flow_variables; i++) {
+ code.AddLine("bool {} = false;", GetFlowVariable(i));
+ }
+ ASTDecompiler decompiler{*this};
+ VideoCommon::Shader::ASTNode program = ir.GetASTProgram();
+ decompiler.Visit(program);
+}
+
} // Anonymous namespace
std::string GetCommonDeclarations() {
diff --git a/src/video_core/renderer_opengl/gl_shader_gen.cpp b/src/video_core/renderer_opengl/gl_shader_gen.cpp
index 3a8d9e1da..b5a43e79e 100644
--- a/src/video_core/renderer_opengl/gl_shader_gen.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_gen.cpp
@@ -11,12 +11,16 @@
namespace OpenGL::GLShader {
using Tegra::Engines::Maxwell3D;
+using VideoCommon::Shader::CompileDepth;
+using VideoCommon::Shader::CompilerSettings;
using VideoCommon::Shader::ProgramCode;
using VideoCommon::Shader::ShaderIR;
static constexpr u32 PROGRAM_OFFSET = 10;
static constexpr u32 COMPUTE_OFFSET = 0;
+static constexpr CompilerSettings settings{CompileDepth::NoFlowStack, true};
+
ProgramResult GenerateVertexShader(const Device& device, const ShaderSetup& setup) {
const std::string id = fmt::format("{:016x}", setup.program.unique_identifier);
@@ -31,13 +35,14 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform vs_config {
)";
- const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
+ const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a, settings);
const auto stage = setup.IsDualProgram() ? ProgramType::VertexA : ProgramType::VertexB;
ProgramResult program = Decompile(device, program_ir, stage, "vertex");
out += program.first;
if (setup.IsDualProgram()) {
- const ShaderIR program_ir_b(setup.program.code_b, PROGRAM_OFFSET, setup.program.size_b);
+ const ShaderIR program_ir_b(setup.program.code_b, PROGRAM_OFFSET, setup.program.size_b,
+ settings);
ProgramResult program_b = Decompile(device, program_ir_b, ProgramType::VertexB, "vertex_b");
out += program_b.first;
}
@@ -80,7 +85,7 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform gs_config {
)";
- const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
+ const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a, settings);
ProgramResult program = Decompile(device, program_ir, ProgramType::Geometry, "geometry");
out += program.first;
@@ -114,7 +119,8 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform fs_config {
};
)";
- const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
+
+ const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a, settings);
ProgramResult program = Decompile(device, program_ir, ProgramType::Fragment, "fragment");
out += program.first;
@@ -133,7 +139,7 @@ ProgramResult GenerateComputeShader(const Device& device, const ShaderSetup& set
std::string out = "// Shader Unique Id: CS" + id + "\n\n";
out += GetCommonDeclarations();
- const ShaderIR program_ir(setup.program.code, COMPUTE_OFFSET, setup.program.size_a);
+ const ShaderIR program_ir(setup.program.code, COMPUTE_OFFSET, setup.program.size_a, settings);
ProgramResult program = Decompile(device, program_ir, ProgramType::Compute, "compute");
out += program.first;
diff --git a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
index 77fc58f25..8bcd04221 100644
--- a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
+++ b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
@@ -88,6 +88,9 @@ bool IsPrecise(Operation operand) {
} // namespace
+class ASTDecompiler;
+class ExprDecompiler;
+
class SPIRVDecompiler : public Sirit::Module {
public:
explicit SPIRVDecompiler(const VKDevice& device, const ShaderIR& ir, ShaderStage stage)
@@ -97,27 +100,7 @@ public:
AddExtension("SPV_KHR_variable_pointers");
}
- void Decompile() {
- AllocateBindings();
- AllocateLabels();
-
- DeclareVertex();
- DeclareGeometry();
- DeclareFragment();
- DeclareRegisters();
- DeclarePredicates();
- DeclareLocalMemory();
- DeclareInternalFlags();
- DeclareInputAttributes();
- DeclareOutputAttributes();
- DeclareConstantBuffers();
- DeclareGlobalBuffers();
- DeclareSamplers();
-
- execute_function =
- Emit(OpFunction(t_void, spv::FunctionControlMask::Inline, TypeFunction(t_void)));
- Emit(OpLabel());
-
+ void DecompileBranchMode() {
const u32 first_address = ir.GetBasicBlocks().begin()->first;
const Id loop_label = OpLabel("loop");
const Id merge_label = OpLabel("merge");
@@ -174,6 +157,43 @@ public:
Emit(continue_label);
Emit(OpBranch(loop_label));
Emit(merge_label);
+ }
+
+ void DecompileAST();
+
+ void Decompile() {
+ const bool is_fully_decompiled = ir.IsDecompiled();
+ AllocateBindings();
+ if (!is_fully_decompiled) {
+ AllocateLabels();
+ }
+
+ DeclareVertex();
+ DeclareGeometry();
+ DeclareFragment();
+ DeclareRegisters();
+ DeclarePredicates();
+ if (is_fully_decompiled) {
+ DeclareFlowVariables();
+ }
+ DeclareLocalMemory();
+ DeclareInternalFlags();
+ DeclareInputAttributes();
+ DeclareOutputAttributes();
+ DeclareConstantBuffers();
+ DeclareGlobalBuffers();
+ DeclareSamplers();
+
+ execute_function =
+ Emit(OpFunction(t_void, spv::FunctionControlMask::Inline, TypeFunction(t_void)));
+ Emit(OpLabel());
+
+ if (is_fully_decompiled) {
+ DecompileAST();
+ } else {
+ DecompileBranchMode();
+ }
+
Emit(OpReturn());
Emit(OpFunctionEnd());
}
@@ -206,6 +226,9 @@ public:
}
private:
+ friend class ASTDecompiler;
+ friend class ExprDecompiler;
+
static constexpr auto INTERNAL_FLAGS_COUNT = static_cast<std::size_t>(InternalFlag::Amount);
void AllocateBindings() {
@@ -294,6 +317,14 @@ private:
}
}
+ void DeclareFlowVariables() {
+ for (u32 i = 0; i < ir.GetASTNumVariables(); i++) {
+ const Id id = OpVariable(t_prv_bool, spv::StorageClass::Private, v_false);
+ Name(id, fmt::format("flow_var_{}", static_cast<u32>(i)));
+ flow_variables.emplace(i, AddGlobalVariable(id));
+ }
+ }
+
void DeclareLocalMemory() {
if (const u64 local_memory_size = header.GetLocalMemorySize(); local_memory_size > 0) {
const auto element_count = static_cast<u32>(Common::AlignUp(local_memory_size, 4) / 4);
@@ -615,9 +646,15 @@ private:
Emit(OpBranchConditional(condition, true_label, skip_label));
Emit(true_label);
+ ++conditional_nest_count;
VisitBasicBlock(conditional->GetCode());
+ --conditional_nest_count;
- Emit(OpBranch(skip_label));
+ if (inside_branch == 0) {
+ Emit(OpBranch(skip_label));
+ } else {
+ inside_branch--;
+ }
Emit(skip_label);
return {};
@@ -980,7 +1017,11 @@ private:
UNIMPLEMENTED_IF(!target);
Emit(OpStore(jmp_to, Constant(t_uint, target->GetValue())));
- BranchingOp([&]() { Emit(OpBranch(continue_label)); });
+ Emit(OpBranch(continue_label));
+ inside_branch = conditional_nest_count;
+ if (conditional_nest_count == 0) {
+ Emit(OpLabel());
+ }
return {};
}
@@ -988,7 +1029,11 @@ private:
const Id op_a = VisitOperand<Type::Uint>(operation, 0);
Emit(OpStore(jmp_to, op_a));
- BranchingOp([&]() { Emit(OpBranch(continue_label)); });
+ Emit(OpBranch(continue_label));
+ inside_branch = conditional_nest_count;
+ if (conditional_nest_count == 0) {
+ Emit(OpLabel());
+ }
return {};
}
@@ -1015,11 +1060,15 @@ private:
Emit(OpStore(flow_stack_top, previous));
Emit(OpStore(jmp_to, target));
- BranchingOp([&]() { Emit(OpBranch(continue_label)); });
+ Emit(OpBranch(continue_label));
+ inside_branch = conditional_nest_count;
+ if (conditional_nest_count == 0) {
+ Emit(OpLabel());
+ }
return {};
}
- Id Exit(Operation operation) {
+ Id PreExit() {
switch (stage) {
case ShaderStage::Vertex: {
// TODO(Rodrigo): We should use VK_EXT_depth_range_unrestricted instead, but it doesn't
@@ -1067,12 +1116,35 @@ private:
}
}
- BranchingOp([&]() { Emit(OpReturn()); });
+ return {};
+ }
+
+ Id Exit(Operation operation) {
+ PreExit();
+ inside_branch = conditional_nest_count;
+ if (conditional_nest_count > 0) {
+ Emit(OpReturn());
+ } else {
+ const Id dummy = OpLabel();
+ Emit(OpBranch(dummy));
+ Emit(dummy);
+ Emit(OpReturn());
+ Emit(OpLabel());
+ }
return {};
}
Id Discard(Operation operation) {
- BranchingOp([&]() { Emit(OpKill()); });
+ inside_branch = conditional_nest_count;
+ if (conditional_nest_count > 0) {
+ Emit(OpKill());
+ } else {
+ const Id dummy = OpLabel();
+ Emit(OpBranch(dummy));
+ Emit(dummy);
+ Emit(OpKill());
+ Emit(OpLabel());
+ }
return {};
}
@@ -1267,17 +1339,6 @@ private:
return {};
}
- void BranchingOp(std::function<void()> call) {
- const Id true_label = OpLabel();
- const Id skip_label = OpLabel();
- Emit(OpSelectionMerge(skip_label, spv::SelectionControlMask::Flatten));
- Emit(OpBranchConditional(v_true, true_label, skip_label, 1, 0));
- Emit(true_label);
- call();
-
- Emit(skip_label);
- }
-
std::tuple<Id, Id> CreateFlowStack() {
// TODO(Rodrigo): Figure out the actual depth of the flow stack, for now it seems unlikely
// that shaders will use 20 nested SSYs and PBKs.
@@ -1483,6 +1544,8 @@ private:
const ShaderIR& ir;
const ShaderStage stage;
const Tegra::Shader::Header header;
+ u64 conditional_nest_count{};
+ u64 inside_branch{};
const Id t_void = Name(TypeVoid(), "void");
@@ -1545,6 +1608,7 @@ private:
Id per_vertex{};
std::map<u32, Id> registers;
std::map<Tegra::Shader::Pred, Id> predicates;
+ std::map<u32, Id> flow_variables;
Id local_memory{};
std::array<Id, INTERNAL_FLAGS_COUNT> internal_flags{};
std::map<Attribute::Index, Id> input_attributes;
@@ -1580,6 +1644,223 @@ private:
std::map<u32, Id> labels;
};
+class ExprDecompiler {
+public:
+ explicit ExprDecompiler(SPIRVDecompiler& decomp) : decomp{decomp} {}
+
+ Id operator()(VideoCommon::Shader::ExprAnd& expr) {
+ const Id type_def = decomp.GetTypeDefinition(Type::Bool);
+ const Id op1 = Visit(expr.operand1);
+ const Id op2 = Visit(expr.operand2);
+ return decomp.Emit(decomp.OpLogicalAnd(type_def, op1, op2));
+ }
+
+ Id operator()(VideoCommon::Shader::ExprOr& expr) {
+ const Id type_def = decomp.GetTypeDefinition(Type::Bool);
+ const Id op1 = Visit(expr.operand1);
+ const Id op2 = Visit(expr.operand2);
+ return decomp.Emit(decomp.OpLogicalOr(type_def, op1, op2));
+ }
+
+ Id operator()(VideoCommon::Shader::ExprNot& expr) {
+ const Id type_def = decomp.GetTypeDefinition(Type::Bool);
+ const Id op1 = Visit(expr.operand1);
+ return decomp.Emit(decomp.OpLogicalNot(type_def, op1));
+ }
+
+ Id operator()(VideoCommon::Shader::ExprPredicate& expr) {
+ const auto pred = static_cast<Tegra::Shader::Pred>(expr.predicate);
+ return decomp.Emit(decomp.OpLoad(decomp.t_bool, decomp.predicates.at(pred)));
+ }
+
+ Id operator()(VideoCommon::Shader::ExprCondCode& expr) {
+ const Node cc = decomp.ir.GetConditionCode(expr.cc);
+ Id target;
+
+ if (const auto pred = std::get_if<PredicateNode>(&*cc)) {
+ const auto index = pred->GetIndex();
+ switch (index) {
+ case Tegra::Shader::Pred::NeverExecute:
+ target = decomp.v_false;
+ case Tegra::Shader::Pred::UnusedIndex:
+ target = decomp.v_true;
+ default:
+ target = decomp.predicates.at(index);
+ }
+ } else if (const auto flag = std::get_if<InternalFlagNode>(&*cc)) {
+ target = decomp.internal_flags.at(static_cast<u32>(flag->GetFlag()));
+ }
+ return decomp.Emit(decomp.OpLoad(decomp.t_bool, target));
+ }
+
+ Id operator()(VideoCommon::Shader::ExprVar& expr) {
+ return decomp.Emit(decomp.OpLoad(decomp.t_bool, decomp.flow_variables.at(expr.var_index)));
+ }
+
+ Id operator()(VideoCommon::Shader::ExprBoolean& expr) {
+ return expr.value ? decomp.v_true : decomp.v_false;
+ }
+
+ Id Visit(VideoCommon::Shader::Expr& node) {
+ return std::visit(*this, *node);
+ }
+
+private:
+ SPIRVDecompiler& decomp;
+};
+
+class ASTDecompiler {
+public:
+ explicit ASTDecompiler(SPIRVDecompiler& decomp) : decomp{decomp} {}
+
+ void operator()(VideoCommon::Shader::ASTProgram& ast) {
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ }
+
+ void operator()(VideoCommon::Shader::ASTIfThen& ast) {
+ ExprDecompiler expr_parser{decomp};
+ const Id condition = expr_parser.Visit(ast.condition);
+ const Id then_label = decomp.OpLabel();
+ const Id endif_label = decomp.OpLabel();
+ decomp.Emit(decomp.OpSelectionMerge(endif_label, spv::SelectionControlMask::MaskNone));
+ decomp.Emit(decomp.OpBranchConditional(condition, then_label, endif_label));
+ decomp.Emit(then_label);
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ decomp.Emit(decomp.OpBranch(endif_label));
+ decomp.Emit(endif_label);
+ }
+
+ void operator()(VideoCommon::Shader::ASTIfElse& ast) {
+ UNREACHABLE();
+ }
+
+ void operator()(VideoCommon::Shader::ASTBlockEncoded& ast) {
+ UNREACHABLE();
+ }
+
+ void operator()(VideoCommon::Shader::ASTBlockDecoded& ast) {
+ decomp.VisitBasicBlock(ast.nodes);
+ }
+
+ void operator()(VideoCommon::Shader::ASTVarSet& ast) {
+ ExprDecompiler expr_parser{decomp};
+ const Id condition = expr_parser.Visit(ast.condition);
+ decomp.Emit(decomp.OpStore(decomp.flow_variables.at(ast.index), condition));
+ }
+
+ void operator()(VideoCommon::Shader::ASTLabel& ast) {
+ // Do nothing
+ }
+
+ void operator()(VideoCommon::Shader::ASTGoto& ast) {
+ UNREACHABLE();
+ }
+
+ void operator()(VideoCommon::Shader::ASTDoWhile& ast) {
+ const Id loop_label = decomp.OpLabel();
+ const Id endloop_label = decomp.OpLabel();
+ const Id loop_start_block = decomp.OpLabel();
+ const Id loop_end_block = decomp.OpLabel();
+ current_loop_exit = endloop_label;
+ decomp.Emit(decomp.OpBranch(loop_label));
+ decomp.Emit(loop_label);
+ decomp.Emit(
+ decomp.OpLoopMerge(endloop_label, loop_end_block, spv::LoopControlMask::MaskNone));
+ decomp.Emit(decomp.OpBranch(loop_start_block));
+ decomp.Emit(loop_start_block);
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ ExprDecompiler expr_parser{decomp};
+ const Id condition = expr_parser.Visit(ast.condition);
+ decomp.Emit(decomp.OpBranchConditional(condition, loop_label, endloop_label));
+ decomp.Emit(endloop_label);
+ }
+
+ void operator()(VideoCommon::Shader::ASTReturn& ast) {
+ if (!VideoCommon::Shader::ExprIsTrue(ast.condition)) {
+ ExprDecompiler expr_parser{decomp};
+ const Id condition = expr_parser.Visit(ast.condition);
+ const Id then_label = decomp.OpLabel();
+ const Id endif_label = decomp.OpLabel();
+ decomp.Emit(decomp.OpSelectionMerge(endif_label, spv::SelectionControlMask::MaskNone));
+ decomp.Emit(decomp.OpBranchConditional(condition, then_label, endif_label));
+ decomp.Emit(then_label);
+ if (ast.kills) {
+ decomp.Emit(decomp.OpKill());
+ } else {
+ decomp.PreExit();
+ decomp.Emit(decomp.OpReturn());
+ }
+ decomp.Emit(endif_label);
+ } else {
+ const Id next_block = decomp.OpLabel();
+ decomp.Emit(decomp.OpBranch(next_block));
+ decomp.Emit(next_block);
+ if (ast.kills) {
+ decomp.Emit(decomp.OpKill());
+ } else {
+ decomp.PreExit();
+ decomp.Emit(decomp.OpReturn());
+ }
+ decomp.Emit(decomp.OpLabel());
+ }
+ }
+
+ void operator()(VideoCommon::Shader::ASTBreak& ast) {
+ if (!VideoCommon::Shader::ExprIsTrue(ast.condition)) {
+ ExprDecompiler expr_parser{decomp};
+ const Id condition = expr_parser.Visit(ast.condition);
+ const Id then_label = decomp.OpLabel();
+ const Id endif_label = decomp.OpLabel();
+ decomp.Emit(decomp.OpSelectionMerge(endif_label, spv::SelectionControlMask::MaskNone));
+ decomp.Emit(decomp.OpBranchConditional(condition, then_label, endif_label));
+ decomp.Emit(then_label);
+ decomp.Emit(decomp.OpBranch(current_loop_exit));
+ decomp.Emit(endif_label);
+ } else {
+ const Id next_block = decomp.OpLabel();
+ decomp.Emit(decomp.OpBranch(next_block));
+ decomp.Emit(next_block);
+ decomp.Emit(decomp.OpBranch(current_loop_exit));
+ decomp.Emit(decomp.OpLabel());
+ }
+ }
+
+ void Visit(VideoCommon::Shader::ASTNode& node) {
+ std::visit(*this, *node->GetInnerData());
+ }
+
+private:
+ SPIRVDecompiler& decomp;
+ Id current_loop_exit{};
+};
+
+void SPIRVDecompiler::DecompileAST() {
+ const u32 num_flow_variables = ir.GetASTNumVariables();
+ for (u32 i = 0; i < num_flow_variables; i++) {
+ const Id id = OpVariable(t_prv_bool, spv::StorageClass::Private, v_false);
+ Name(id, fmt::format("flow_var_{}", i));
+ flow_variables.emplace(i, AddGlobalVariable(id));
+ }
+ ASTDecompiler decompiler{*this};
+ VideoCommon::Shader::ASTNode program = ir.GetASTProgram();
+ decompiler.Visit(program);
+ const Id next_block = OpLabel();
+ Emit(OpBranch(next_block));
+ Emit(next_block);
+}
+
DecompilerResult Decompile(const VKDevice& device, const VideoCommon::Shader::ShaderIR& ir,
Maxwell::ShaderStage stage) {
auto decompiler = std::make_unique<SPIRVDecompiler>(device, ir, stage);
diff --git a/src/video_core/shader/ast.cpp b/src/video_core/shader/ast.cpp
new file mode 100644
index 000000000..436d45f4b
--- /dev/null
+++ b/src/video_core/shader/ast.cpp
@@ -0,0 +1,738 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <string>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/shader/ast.h"
+#include "video_core/shader/expr.h"
+
+namespace VideoCommon::Shader {
+
+ASTZipper::ASTZipper() = default;
+
+void ASTZipper::Init(const ASTNode new_first, const ASTNode parent) {
+ ASSERT(new_first->manager == nullptr);
+ first = new_first;
+ last = new_first;
+
+ ASTNode current = first;
+ while (current) {
+ current->manager = this;
+ current->parent = parent;
+ last = current;
+ current = current->next;
+ }
+}
+
+void ASTZipper::PushBack(const ASTNode new_node) {
+ ASSERT(new_node->manager == nullptr);
+ new_node->previous = last;
+ if (last) {
+ last->next = new_node;
+ }
+ new_node->next.reset();
+ last = new_node;
+ if (!first) {
+ first = new_node;
+ }
+ new_node->manager = this;
+}
+
+void ASTZipper::PushFront(const ASTNode new_node) {
+ ASSERT(new_node->manager == nullptr);
+ new_node->previous.reset();
+ new_node->next = first;
+ if (first) {
+ first->previous = new_node;
+ }
+ if (last == first) {
+ last = new_node;
+ }
+ first = new_node;
+ new_node->manager = this;
+}
+
+void ASTZipper::InsertAfter(const ASTNode new_node, const ASTNode at_node) {
+ ASSERT(new_node->manager == nullptr);
+ if (!at_node) {
+ PushFront(new_node);
+ return;
+ }
+ const ASTNode next = at_node->next;
+ if (next) {
+ next->previous = new_node;
+ }
+ new_node->previous = at_node;
+ if (at_node == last) {
+ last = new_node;
+ }
+ new_node->next = next;
+ at_node->next = new_node;
+ new_node->manager = this;
+}
+
+void ASTZipper::InsertBefore(const ASTNode new_node, const ASTNode at_node) {
+ ASSERT(new_node->manager == nullptr);
+ if (!at_node) {
+ PushBack(new_node);
+ return;
+ }
+ const ASTNode previous = at_node->previous;
+ if (previous) {
+ previous->next = new_node;
+ }
+ new_node->next = at_node;
+ if (at_node == first) {
+ first = new_node;
+ }
+ new_node->previous = previous;
+ at_node->previous = new_node;
+ new_node->manager = this;
+}
+
+void ASTZipper::DetachTail(ASTNode node) {
+ ASSERT(node->manager == this);
+ if (node == first) {
+ first.reset();
+ last.reset();
+ return;
+ }
+
+ last = node->previous;
+ last->next.reset();
+ node->previous.reset();
+
+ ASTNode current = std::move(node);
+ while (current) {
+ current->manager = nullptr;
+ current->parent.reset();
+ current = current->next;
+ }
+}
+
+void ASTZipper::DetachSegment(const ASTNode start, const ASTNode end) {
+ ASSERT(start->manager == this && end->manager == this);
+ if (start == end) {
+ DetachSingle(start);
+ return;
+ }
+ const ASTNode prev = start->previous;
+ const ASTNode post = end->next;
+ if (!prev) {
+ first = post;
+ } else {
+ prev->next = post;
+ }
+ if (!post) {
+ last = prev;
+ } else {
+ post->previous = prev;
+ }
+ start->previous.reset();
+ end->next.reset();
+ ASTNode current = start;
+ bool found = false;
+ while (current) {
+ current->manager = nullptr;
+ current->parent.reset();
+ found |= current == end;
+ current = current->next;
+ }
+ ASSERT(found);
+}
+
+void ASTZipper::DetachSingle(const ASTNode node) {
+ ASSERT(node->manager == this);
+ const ASTNode prev = node->previous;
+ const ASTNode post = node->next;
+ node->previous.reset();
+ node->next.reset();
+ if (!prev) {
+ first = post;
+ } else {
+ prev->next = post;
+ }
+ if (!post) {
+ last = prev;
+ } else {
+ post->previous = prev;
+ }
+
+ node->manager = nullptr;
+ node->parent.reset();
+}
+
+void ASTZipper::Remove(const ASTNode node) {
+ ASSERT(node->manager == this);
+ const ASTNode next = node->next;
+ const ASTNode previous = node->previous;
+ if (previous) {
+ previous->next = next;
+ }
+ if (next) {
+ next->previous = previous;
+ }
+ node->parent.reset();
+ node->manager = nullptr;
+ if (node == last) {
+ last = previous;
+ }
+ if (node == first) {
+ first = next;
+ }
+}
+
+class ExprPrinter final {
+public:
+ void operator()(const ExprAnd& expr) {
+ inner += "( ";
+ std::visit(*this, *expr.operand1);
+ inner += " && ";
+ std::visit(*this, *expr.operand2);
+ inner += ')';
+ }
+
+ void operator()(const ExprOr& expr) {
+ inner += "( ";
+ std::visit(*this, *expr.operand1);
+ inner += " || ";
+ std::visit(*this, *expr.operand2);
+ inner += ')';
+ }
+
+ void operator()(const ExprNot& expr) {
+ inner += "!";
+ std::visit(*this, *expr.operand1);
+ }
+
+ void operator()(const ExprPredicate& expr) {
+ inner += "P" + std::to_string(expr.predicate);
+ }
+
+ void operator()(const ExprCondCode& expr) {
+ u32 cc = static_cast<u32>(expr.cc);
+ inner += "CC" + std::to_string(cc);
+ }
+
+ void operator()(const ExprVar& expr) {
+ inner += "V" + std::to_string(expr.var_index);
+ }
+
+ void operator()(const ExprBoolean& expr) {
+ inner += expr.value ? "true" : "false";
+ }
+
+ const std::string& GetResult() const {
+ return inner;
+ }
+
+ std::string inner{};
+};
+
+class ASTPrinter {
+public:
+ void operator()(const ASTProgram& ast) {
+ scope++;
+ inner += "program {\n";
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ inner += "}\n";
+ scope--;
+ }
+
+ void operator()(const ASTIfThen& ast) {
+ ExprPrinter expr_parser{};
+ std::visit(expr_parser, *ast.condition);
+ inner += Ident() + "if (" + expr_parser.GetResult() + ") {\n";
+ scope++;
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ scope--;
+ inner += Ident() + "}\n";
+ }
+
+ void operator()(const ASTIfElse& ast) {
+ inner += Ident() + "else {\n";
+ scope++;
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ scope--;
+ inner += Ident() + "}\n";
+ }
+
+ void operator()(const ASTBlockEncoded& ast) {
+ inner += Ident() + "Block(" + std::to_string(ast.start) + ", " + std::to_string(ast.end) +
+ ");\n";
+ }
+
+ void operator()(const ASTBlockDecoded& ast) {
+ inner += Ident() + "Block;\n";
+ }
+
+ void operator()(const ASTVarSet& ast) {
+ ExprPrinter expr_parser{};
+ std::visit(expr_parser, *ast.condition);
+ inner +=
+ Ident() + "V" + std::to_string(ast.index) + " := " + expr_parser.GetResult() + ";\n";
+ }
+
+ void operator()(const ASTLabel& ast) {
+ inner += "Label_" + std::to_string(ast.index) + ":\n";
+ }
+
+ void operator()(const ASTGoto& ast) {
+ ExprPrinter expr_parser{};
+ std::visit(expr_parser, *ast.condition);
+ inner += Ident() + "(" + expr_parser.GetResult() + ") -> goto Label_" +
+ std::to_string(ast.label) + ";\n";
+ }
+
+ void operator()(const ASTDoWhile& ast) {
+ ExprPrinter expr_parser{};
+ std::visit(expr_parser, *ast.condition);
+ inner += Ident() + "do {\n";
+ scope++;
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ scope--;
+ inner += Ident() + "} while (" + expr_parser.GetResult() + ");\n";
+ }
+
+ void operator()(const ASTReturn& ast) {
+ ExprPrinter expr_parser{};
+ std::visit(expr_parser, *ast.condition);
+ inner += Ident() + "(" + expr_parser.GetResult() + ") -> " +
+ (ast.kills ? "discard" : "exit") + ";\n";
+ }
+
+ void operator()(const ASTBreak& ast) {
+ ExprPrinter expr_parser{};
+ std::visit(expr_parser, *ast.condition);
+ inner += Ident() + "(" + expr_parser.GetResult() + ") -> break;\n";
+ }
+
+ std::string& Ident() {
+ if (memo_scope == scope) {
+ return tabs_memo;
+ }
+ tabs_memo = tabs.substr(0, scope * 2);
+ memo_scope = scope;
+ return tabs_memo;
+ }
+
+ void Visit(ASTNode& node) {
+ std::visit(*this, *node->GetInnerData());
+ }
+
+ const std::string& GetResult() const {
+ return inner;
+ }
+
+private:
+ std::string inner{};
+ u32 scope{};
+
+ std::string tabs_memo{};
+ u32 memo_scope{};
+
+ static constexpr std::string_view tabs{" "};
+};
+
+std::string ASTManager::Print() {
+ ASTPrinter printer{};
+ printer.Visit(main_node);
+ return printer.GetResult();
+}
+
+ASTManager::ASTManager(bool full_decompile, bool disable_else_derivation)
+ : full_decompile{full_decompile}, disable_else_derivation{disable_else_derivation} {};
+
+ASTManager::~ASTManager() {
+ Clear();
+}
+
+void ASTManager::Init() {
+ main_node = ASTBase::Make<ASTProgram>(ASTNode{});
+ program = std::get_if<ASTProgram>(main_node->GetInnerData());
+ false_condition = MakeExpr<ExprBoolean>(false);
+}
+
+void ASTManager::DeclareLabel(u32 address) {
+ const auto pair = labels_map.emplace(address, labels_count);
+ if (pair.second) {
+ labels_count++;
+ labels.resize(labels_count);
+ }
+}
+
+void ASTManager::InsertLabel(u32 address) {
+ const u32 index = labels_map[address];
+ const ASTNode label = ASTBase::Make<ASTLabel>(main_node, index);
+ labels[index] = label;
+ program->nodes.PushBack(label);
+}
+
+void ASTManager::InsertGoto(Expr condition, u32 address) {
+ const u32 index = labels_map[address];
+ const ASTNode goto_node = ASTBase::Make<ASTGoto>(main_node, std::move(condition), index);
+ gotos.push_back(goto_node);
+ program->nodes.PushBack(goto_node);
+}
+
+void ASTManager::InsertBlock(u32 start_address, u32 end_address) {
+ ASTNode block = ASTBase::Make<ASTBlockEncoded>(main_node, start_address, end_address);
+ program->nodes.PushBack(std::move(block));
+}
+
+void ASTManager::InsertReturn(Expr condition, bool kills) {
+ ASTNode node = ASTBase::Make<ASTReturn>(main_node, std::move(condition), kills);
+ program->nodes.PushBack(std::move(node));
+}
+
+// The decompile algorithm is based on
+// "Taming control flow: A structured approach to eliminating goto statements"
+// by AM Erosa, LJ Hendren 1994. In general, the idea is to get gotos to be
+// on the same structured level as the label which they jump to. This is done,
+// through outward/inward movements and lifting. Once they are at the same
+// level, you can enclose them in an "if" structure or a "do-while" structure.
+void ASTManager::Decompile() {
+ auto it = gotos.begin();
+ while (it != gotos.end()) {
+ const ASTNode goto_node = *it;
+ const auto label_index = goto_node->GetGotoLabel();
+ if (!label_index) {
+ return;
+ }
+ const ASTNode label = labels[*label_index];
+ if (!full_decompile) {
+ // We only decompile backward jumps
+ if (!IsBackwardsJump(goto_node, label)) {
+ it++;
+ continue;
+ }
+ }
+ if (IndirectlyRelated(goto_node, label)) {
+ while (!DirectlyRelated(goto_node, label)) {
+ MoveOutward(goto_node);
+ }
+ }
+ if (DirectlyRelated(goto_node, label)) {
+ u32 goto_level = goto_node->GetLevel();
+ const u32 label_level = label->GetLevel();
+ while (label_level < goto_level) {
+ MoveOutward(goto_node);
+ goto_level--;
+ }
+ // TODO(Blinkhawk): Implement Lifting and Inward Movements
+ }
+ if (label->GetParent() == goto_node->GetParent()) {
+ bool is_loop = false;
+ ASTNode current = goto_node->GetPrevious();
+ while (current) {
+ if (current == label) {
+ is_loop = true;
+ break;
+ }
+ current = current->GetPrevious();
+ }
+
+ if (is_loop) {
+ EncloseDoWhile(goto_node, label);
+ } else {
+ EncloseIfThen(goto_node, label);
+ }
+ it = gotos.erase(it);
+ continue;
+ }
+ it++;
+ }
+ if (full_decompile) {
+ for (const ASTNode& label : labels) {
+ auto& manager = label->GetManager();
+ manager.Remove(label);
+ }
+ labels.clear();
+ } else {
+ auto label_it = labels.begin();
+ while (label_it != labels.end()) {
+ bool can_remove = true;
+ ASTNode label = *label_it;
+ for (const ASTNode& goto_node : gotos) {
+ const auto label_index = goto_node->GetGotoLabel();
+ if (!label_index) {
+ return;
+ }
+ ASTNode& glabel = labels[*label_index];
+ if (glabel == label) {
+ can_remove = false;
+ break;
+ }
+ }
+ if (can_remove) {
+ label->MarkLabelUnused();
+ }
+ }
+ }
+}
+
+bool ASTManager::IsBackwardsJump(ASTNode goto_node, ASTNode label_node) const {
+ u32 goto_level = goto_node->GetLevel();
+ u32 label_level = label_node->GetLevel();
+ while (goto_level > label_level) {
+ goto_level--;
+ goto_node = goto_node->GetParent();
+ }
+ while (label_level > goto_level) {
+ label_level--;
+ label_node = label_node->GetParent();
+ }
+ while (goto_node->GetParent() != label_node->GetParent()) {
+ goto_node = goto_node->GetParent();
+ label_node = label_node->GetParent();
+ }
+ ASTNode current = goto_node->GetPrevious();
+ while (current) {
+ if (current == label_node) {
+ return true;
+ }
+ current = current->GetPrevious();
+ }
+ return false;
+}
+
+bool ASTManager::IndirectlyRelated(const ASTNode& first, const ASTNode& second) const {
+ return !(first->GetParent() == second->GetParent() || DirectlyRelated(first, second));
+}
+
+bool ASTManager::DirectlyRelated(const ASTNode& first, const ASTNode& second) const {
+ if (first->GetParent() == second->GetParent()) {
+ return false;
+ }
+ const u32 first_level = first->GetLevel();
+ const u32 second_level = second->GetLevel();
+ u32 min_level;
+ u32 max_level;
+ ASTNode max;
+ ASTNode min;
+ if (first_level > second_level) {
+ min_level = second_level;
+ min = second;
+ max_level = first_level;
+ max = first;
+ } else {
+ min_level = first_level;
+ min = first;
+ max_level = second_level;
+ max = second;
+ }
+
+ while (max_level > min_level) {
+ max_level--;
+ max = max->GetParent();
+ }
+
+ return min->GetParent() == max->GetParent();
+}
+
+void ASTManager::ShowCurrentState(std::string_view state) {
+ LOG_CRITICAL(HW_GPU, "\nState {}:\n\n{}\n", state, Print());
+ SanityCheck();
+}
+
+void ASTManager::SanityCheck() {
+ for (auto& label : labels) {
+ if (!label->GetParent()) {
+ LOG_CRITICAL(HW_GPU, "Sanity Check Failed");
+ }
+ }
+}
+
+void ASTManager::EncloseDoWhile(ASTNode goto_node, ASTNode label) {
+ ASTZipper& zipper = goto_node->GetManager();
+ const ASTNode loop_start = label->GetNext();
+ if (loop_start == goto_node) {
+ zipper.Remove(goto_node);
+ return;
+ }
+ const ASTNode parent = label->GetParent();
+ const Expr condition = goto_node->GetGotoCondition();
+ zipper.DetachSegment(loop_start, goto_node);
+ const ASTNode do_while_node = ASTBase::Make<ASTDoWhile>(parent, condition);
+ ASTZipper* sub_zipper = do_while_node->GetSubNodes();
+ sub_zipper->Init(loop_start, do_while_node);
+ zipper.InsertAfter(do_while_node, label);
+ sub_zipper->Remove(goto_node);
+}
+
+void ASTManager::EncloseIfThen(ASTNode goto_node, ASTNode label) {
+ ASTZipper& zipper = goto_node->GetManager();
+ const ASTNode if_end = label->GetPrevious();
+ if (if_end == goto_node) {
+ zipper.Remove(goto_node);
+ return;
+ }
+ const ASTNode prev = goto_node->GetPrevious();
+ const Expr condition = goto_node->GetGotoCondition();
+ bool do_else = false;
+ if (!disable_else_derivation && prev->IsIfThen()) {
+ const Expr if_condition = prev->GetIfCondition();
+ do_else = ExprAreEqual(if_condition, condition);
+ }
+ const ASTNode parent = label->GetParent();
+ zipper.DetachSegment(goto_node, if_end);
+ ASTNode if_node;
+ if (do_else) {
+ if_node = ASTBase::Make<ASTIfElse>(parent);
+ } else {
+ Expr neg_condition = MakeExprNot(condition);
+ if_node = ASTBase::Make<ASTIfThen>(parent, neg_condition);
+ }
+ ASTZipper* sub_zipper = if_node->GetSubNodes();
+ sub_zipper->Init(goto_node, if_node);
+ zipper.InsertAfter(if_node, prev);
+ sub_zipper->Remove(goto_node);
+}
+
+void ASTManager::MoveOutward(ASTNode goto_node) {
+ ASTZipper& zipper = goto_node->GetManager();
+ const ASTNode parent = goto_node->GetParent();
+ ASTZipper& zipper2 = parent->GetManager();
+ const ASTNode grandpa = parent->GetParent();
+ const bool is_loop = parent->IsLoop();
+ const bool is_else = parent->IsIfElse();
+ const bool is_if = parent->IsIfThen();
+
+ const ASTNode prev = goto_node->GetPrevious();
+ const ASTNode post = goto_node->GetNext();
+
+ const Expr condition = goto_node->GetGotoCondition();
+ zipper.DetachSingle(goto_node);
+ if (is_loop) {
+ const u32 var_index = NewVariable();
+ const Expr var_condition = MakeExpr<ExprVar>(var_index);
+ const ASTNode var_node = ASTBase::Make<ASTVarSet>(parent, var_index, condition);
+ const ASTNode var_node_init = ASTBase::Make<ASTVarSet>(parent, var_index, false_condition);
+ zipper2.InsertBefore(var_node_init, parent);
+ zipper.InsertAfter(var_node, prev);
+ goto_node->SetGotoCondition(var_condition);
+ const ASTNode break_node = ASTBase::Make<ASTBreak>(parent, var_condition);
+ zipper.InsertAfter(break_node, var_node);
+ } else if (is_if || is_else) {
+ const u32 var_index = NewVariable();
+ const Expr var_condition = MakeExpr<ExprVar>(var_index);
+ const ASTNode var_node = ASTBase::Make<ASTVarSet>(parent, var_index, condition);
+ const ASTNode var_node_init = ASTBase::Make<ASTVarSet>(parent, var_index, false_condition);
+ if (is_if) {
+ zipper2.InsertBefore(var_node_init, parent);
+ } else {
+ zipper2.InsertBefore(var_node_init, parent->GetPrevious());
+ }
+ zipper.InsertAfter(var_node, prev);
+ goto_node->SetGotoCondition(var_condition);
+ if (post) {
+ zipper.DetachTail(post);
+ const ASTNode if_node = ASTBase::Make<ASTIfThen>(parent, MakeExprNot(var_condition));
+ ASTZipper* sub_zipper = if_node->GetSubNodes();
+ sub_zipper->Init(post, if_node);
+ zipper.InsertAfter(if_node, var_node);
+ }
+ } else {
+ UNREACHABLE();
+ }
+ const ASTNode next = parent->GetNext();
+ if (is_if && next && next->IsIfElse()) {
+ zipper2.InsertAfter(goto_node, next);
+ goto_node->SetParent(grandpa);
+ return;
+ }
+ zipper2.InsertAfter(goto_node, parent);
+ goto_node->SetParent(grandpa);
+}
+
+class ASTClearer {
+public:
+ ASTClearer() = default;
+
+ void operator()(const ASTProgram& ast) {
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ }
+
+ void operator()(const ASTIfThen& ast) {
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ }
+
+ void operator()(const ASTIfElse& ast) {
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ }
+
+ void operator()([[maybe_unused]] const ASTBlockEncoded& ast) {}
+
+ void operator()(ASTBlockDecoded& ast) {
+ ast.nodes.clear();
+ }
+
+ void operator()([[maybe_unused]] const ASTVarSet& ast) {}
+
+ void operator()([[maybe_unused]] const ASTLabel& ast) {}
+
+ void operator()([[maybe_unused]] const ASTGoto& ast) {}
+
+ void operator()(const ASTDoWhile& ast) {
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ }
+
+ void operator()([[maybe_unused]] const ASTReturn& ast) {}
+
+ void operator()([[maybe_unused]] const ASTBreak& ast) {}
+
+ void Visit(const ASTNode& node) {
+ std::visit(*this, *node->GetInnerData());
+ node->Clear();
+ }
+};
+
+void ASTManager::Clear() {
+ if (!main_node) {
+ return;
+ }
+ ASTClearer clearer{};
+ clearer.Visit(main_node);
+ main_node.reset();
+ program = nullptr;
+ labels_map.clear();
+ labels.clear();
+ gotos.clear();
+}
+
+} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/ast.h b/src/video_core/shader/ast.h
new file mode 100644
index 000000000..d7bf11821
--- /dev/null
+++ b/src/video_core/shader/ast.h
@@ -0,0 +1,400 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <functional>
+#include <list>
+#include <memory>
+#include <optional>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "video_core/shader/expr.h"
+#include "video_core/shader/node.h"
+
+namespace VideoCommon::Shader {
+
+class ASTBase;
+class ASTBlockDecoded;
+class ASTBlockEncoded;
+class ASTBreak;
+class ASTDoWhile;
+class ASTGoto;
+class ASTIfElse;
+class ASTIfThen;
+class ASTLabel;
+class ASTProgram;
+class ASTReturn;
+class ASTVarSet;
+
+using ASTData = std::variant<ASTProgram, ASTIfThen, ASTIfElse, ASTBlockEncoded, ASTBlockDecoded,
+ ASTVarSet, ASTGoto, ASTLabel, ASTDoWhile, ASTReturn, ASTBreak>;
+
+using ASTNode = std::shared_ptr<ASTBase>;
+
+enum class ASTZipperType : u32 {
+ Program,
+ IfThen,
+ IfElse,
+ Loop,
+};
+
+class ASTZipper final {
+public:
+ explicit ASTZipper();
+
+ void Init(ASTNode first, ASTNode parent);
+
+ ASTNode GetFirst() const {
+ return first;
+ }
+
+ ASTNode GetLast() const {
+ return last;
+ }
+
+ void PushBack(ASTNode new_node);
+ void PushFront(ASTNode new_node);
+ void InsertAfter(ASTNode new_node, ASTNode at_node);
+ void InsertBefore(ASTNode new_node, ASTNode at_node);
+ void DetachTail(ASTNode node);
+ void DetachSingle(ASTNode node);
+ void DetachSegment(ASTNode start, ASTNode end);
+ void Remove(ASTNode node);
+
+ ASTNode first{};
+ ASTNode last{};
+};
+
+class ASTProgram {
+public:
+ ASTZipper nodes{};
+};
+
+class ASTIfThen {
+public:
+ explicit ASTIfThen(Expr condition) : condition{std::move(condition)} {}
+ Expr condition;
+ ASTZipper nodes{};
+};
+
+class ASTIfElse {
+public:
+ ASTZipper nodes{};
+};
+
+class ASTBlockEncoded {
+public:
+ explicit ASTBlockEncoded(u32 start, u32 end) : start{start}, end{end} {}
+ u32 start;
+ u32 end;
+};
+
+class ASTBlockDecoded {
+public:
+ explicit ASTBlockDecoded(NodeBlock&& new_nodes) : nodes(std::move(new_nodes)) {}
+ NodeBlock nodes;
+};
+
+class ASTVarSet {
+public:
+ explicit ASTVarSet(u32 index, Expr condition) : index{index}, condition{std::move(condition)} {}
+ u32 index;
+ Expr condition;
+};
+
+class ASTLabel {
+public:
+ explicit ASTLabel(u32 index) : index{index} {}
+ u32 index;
+ bool unused{};
+};
+
+class ASTGoto {
+public:
+ explicit ASTGoto(Expr condition, u32 label) : condition{std::move(condition)}, label{label} {}
+ Expr condition;
+ u32 label;
+};
+
+class ASTDoWhile {
+public:
+ explicit ASTDoWhile(Expr condition) : condition{std::move(condition)} {}
+ Expr condition;
+ ASTZipper nodes{};
+};
+
+class ASTReturn {
+public:
+ explicit ASTReturn(Expr condition, bool kills)
+ : condition{std::move(condition)}, kills{kills} {}
+ Expr condition;
+ bool kills;
+};
+
+class ASTBreak {
+public:
+ explicit ASTBreak(Expr condition) : condition{std::move(condition)} {}
+ Expr condition;
+};
+
+class ASTBase {
+public:
+ explicit ASTBase(ASTNode parent, ASTData data)
+ : data{std::move(data)}, parent{std::move(parent)} {}
+
+ template <class U, class... Args>
+ static ASTNode Make(ASTNode parent, Args&&... args) {
+ return std::make_shared<ASTBase>(std::move(parent),
+ ASTData(U(std::forward<Args>(args)...)));
+ }
+
+ void SetParent(ASTNode new_parent) {
+ parent = std::move(new_parent);
+ }
+
+ ASTNode& GetParent() {
+ return parent;
+ }
+
+ const ASTNode& GetParent() const {
+ return parent;
+ }
+
+ u32 GetLevel() const {
+ u32 level = 0;
+ auto next_parent = parent;
+ while (next_parent) {
+ next_parent = next_parent->GetParent();
+ level++;
+ }
+ return level;
+ }
+
+ ASTData* GetInnerData() {
+ return &data;
+ }
+
+ const ASTData* GetInnerData() const {
+ return &data;
+ }
+
+ ASTNode GetNext() const {
+ return next;
+ }
+
+ ASTNode GetPrevious() const {
+ return previous;
+ }
+
+ ASTZipper& GetManager() {
+ return *manager;
+ }
+
+ const ASTZipper& GetManager() const {
+ return *manager;
+ }
+
+ std::optional<u32> GetGotoLabel() const {
+ auto inner = std::get_if<ASTGoto>(&data);
+ if (inner) {
+ return {inner->label};
+ }
+ return {};
+ }
+
+ Expr GetGotoCondition() const {
+ auto inner = std::get_if<ASTGoto>(&data);
+ if (inner) {
+ return inner->condition;
+ }
+ return nullptr;
+ }
+
+ void MarkLabelUnused() {
+ auto inner = std::get_if<ASTLabel>(&data);
+ if (inner) {
+ inner->unused = true;
+ }
+ }
+
+ bool IsLabelUnused() const {
+ auto inner = std::get_if<ASTLabel>(&data);
+ if (inner) {
+ return inner->unused;
+ }
+ return true;
+ }
+
+ std::optional<u32> GetLabelIndex() const {
+ auto inner = std::get_if<ASTLabel>(&data);
+ if (inner) {
+ return {inner->index};
+ }
+ return {};
+ }
+
+ Expr GetIfCondition() const {
+ auto inner = std::get_if<ASTIfThen>(&data);
+ if (inner) {
+ return inner->condition;
+ }
+ return nullptr;
+ }
+
+ void SetGotoCondition(Expr new_condition) {
+ auto inner = std::get_if<ASTGoto>(&data);
+ if (inner) {
+ inner->condition = std::move(new_condition);
+ }
+ }
+
+ bool IsIfThen() const {
+ return std::holds_alternative<ASTIfThen>(data);
+ }
+
+ bool IsIfElse() const {
+ return std::holds_alternative<ASTIfElse>(data);
+ }
+
+ bool IsBlockEncoded() const {
+ return std::holds_alternative<ASTBlockEncoded>(data);
+ }
+
+ void TransformBlockEncoded(NodeBlock&& nodes) {
+ data = ASTBlockDecoded(std::move(nodes));
+ }
+
+ bool IsLoop() const {
+ return std::holds_alternative<ASTDoWhile>(data);
+ }
+
+ ASTZipper* GetSubNodes() {
+ if (std::holds_alternative<ASTProgram>(data)) {
+ return &std::get_if<ASTProgram>(&data)->nodes;
+ }
+ if (std::holds_alternative<ASTIfThen>(data)) {
+ return &std::get_if<ASTIfThen>(&data)->nodes;
+ }
+ if (std::holds_alternative<ASTIfElse>(data)) {
+ return &std::get_if<ASTIfElse>(&data)->nodes;
+ }
+ if (std::holds_alternative<ASTDoWhile>(data)) {
+ return &std::get_if<ASTDoWhile>(&data)->nodes;
+ }
+ return nullptr;
+ }
+
+ void Clear() {
+ next.reset();
+ previous.reset();
+ parent.reset();
+ manager = nullptr;
+ }
+
+private:
+ friend class ASTZipper;
+
+ ASTData data;
+ ASTNode parent{};
+ ASTNode next{};
+ ASTNode previous{};
+ ASTZipper* manager{};
+};
+
+class ASTManager final {
+public:
+ ASTManager(bool full_decompile, bool disable_else_derivation);
+ ~ASTManager();
+
+ ASTManager(const ASTManager& o) = delete;
+ ASTManager& operator=(const ASTManager& other) = delete;
+
+ ASTManager(ASTManager&& other) noexcept = default;
+ ASTManager& operator=(ASTManager&& other) noexcept = default;
+
+ void Init();
+
+ void DeclareLabel(u32 address);
+
+ void InsertLabel(u32 address);
+
+ void InsertGoto(Expr condition, u32 address);
+
+ void InsertBlock(u32 start_address, u32 end_address);
+
+ void InsertReturn(Expr condition, bool kills);
+
+ std::string Print();
+
+ void Decompile();
+
+ void ShowCurrentState(std::string_view state);
+
+ void SanityCheck();
+
+ void Clear();
+
+ bool IsFullyDecompiled() const {
+ if (full_decompile) {
+ return gotos.empty();
+ }
+
+ for (ASTNode goto_node : gotos) {
+ auto label_index = goto_node->GetGotoLabel();
+ if (!label_index) {
+ return false;
+ }
+ ASTNode glabel = labels[*label_index];
+ if (IsBackwardsJump(goto_node, glabel)) {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ ASTNode GetProgram() const {
+ return main_node;
+ }
+
+ u32 GetVariables() const {
+ return variables;
+ }
+
+ const std::vector<ASTNode>& GetLabels() const {
+ return labels;
+ }
+
+private:
+ bool IsBackwardsJump(ASTNode goto_node, ASTNode label_node) const;
+
+ bool IndirectlyRelated(const ASTNode& first, const ASTNode& second) const;
+
+ bool DirectlyRelated(const ASTNode& first, const ASTNode& second) const;
+
+ void EncloseDoWhile(ASTNode goto_node, ASTNode label);
+
+ void EncloseIfThen(ASTNode goto_node, ASTNode label);
+
+ void MoveOutward(ASTNode goto_node);
+
+ u32 NewVariable() {
+ return variables++;
+ }
+
+ bool full_decompile{};
+ bool disable_else_derivation{};
+ std::unordered_map<u32, u32> labels_map{};
+ u32 labels_count{};
+ std::vector<ASTNode> labels{};
+ std::list<ASTNode> gotos{};
+ u32 variables{};
+ ASTProgram* program{};
+ ASTNode main_node{};
+ Expr false_condition{};
+};
+
+} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/compiler_settings.cpp b/src/video_core/shader/compiler_settings.cpp
new file mode 100644
index 000000000..cddcbd4f0
--- /dev/null
+++ b/src/video_core/shader/compiler_settings.cpp
@@ -0,0 +1,26 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "video_core/shader/compiler_settings.h"
+
+namespace VideoCommon::Shader {
+
+std::string CompileDepthAsString(const CompileDepth cd) {
+ switch (cd) {
+ case CompileDepth::BruteForce:
+ return "Brute Force Compile";
+ case CompileDepth::FlowStack:
+ return "Simple Flow Stack Mode";
+ case CompileDepth::NoFlowStack:
+ return "Remove Flow Stack";
+ case CompileDepth::DecompileBackwards:
+ return "Decompile Backward Jumps";
+ case CompileDepth::FullDecompile:
+ return "Full Decompilation";
+ default:
+ return "Unknown Compiler Process";
+ }
+}
+
+} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/compiler_settings.h b/src/video_core/shader/compiler_settings.h
new file mode 100644
index 000000000..916018c01
--- /dev/null
+++ b/src/video_core/shader/compiler_settings.h
@@ -0,0 +1,26 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "video_core/engines/shader_bytecode.h"
+
+namespace VideoCommon::Shader {
+
+enum class CompileDepth : u32 {
+ BruteForce = 0,
+ FlowStack = 1,
+ NoFlowStack = 2,
+ DecompileBackwards = 3,
+ FullDecompile = 4,
+};
+
+std::string CompileDepthAsString(CompileDepth cd);
+
+struct CompilerSettings {
+ CompileDepth depth{CompileDepth::NoFlowStack};
+ bool disable_else_derivation{true};
+};
+
+} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/control_flow.cpp b/src/video_core/shader/control_flow.cpp
index ec3a76690..268d1aed0 100644
--- a/src/video_core/shader/control_flow.cpp
+++ b/src/video_core/shader/control_flow.cpp
@@ -4,13 +4,14 @@
#include <list>
#include <map>
+#include <set>
#include <stack>
#include <unordered_map>
-#include <unordered_set>
#include <vector>
#include "common/assert.h"
#include "common/common_types.h"
+#include "video_core/shader/ast.h"
#include "video_core/shader/control_flow.h"
#include "video_core/shader/shader_ir.h"
@@ -64,12 +65,13 @@ struct CFGRebuildState {
std::list<u32> inspect_queries{};
std::list<Query> queries{};
std::unordered_map<u32, u32> registered{};
- std::unordered_set<u32> labels{};
+ std::set<u32> labels{};
std::map<u32, u32> ssy_labels{};
std::map<u32, u32> pbk_labels{};
std::unordered_map<u32, BlockStack> stacks{};
const ProgramCode& program_code;
const std::size_t program_size;
+ ASTManager* manager;
};
enum class BlockCollision : u32 { None, Found, Inside };
@@ -415,38 +417,133 @@ bool TryQuery(CFGRebuildState& state) {
}
} // Anonymous namespace
-std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
- std::size_t program_size, u32 start_address) {
- CFGRebuildState state{program_code, program_size, start_address};
+void InsertBranch(ASTManager& mm, const BlockBranchInfo& branch) {
+ const auto get_expr = ([&](const Condition& cond) -> Expr {
+ Expr result{};
+ if (cond.cc != ConditionCode::T) {
+ result = MakeExpr<ExprCondCode>(cond.cc);
+ }
+ if (cond.predicate != Pred::UnusedIndex) {
+ u32 pred = static_cast<u32>(cond.predicate);
+ bool negate = false;
+ if (pred > 7) {
+ negate = true;
+ pred -= 8;
+ }
+ Expr extra = MakeExpr<ExprPredicate>(pred);
+ if (negate) {
+ extra = MakeExpr<ExprNot>(extra);
+ }
+ if (result) {
+ return MakeExpr<ExprAnd>(extra, result);
+ }
+ return extra;
+ }
+ if (result) {
+ return result;
+ }
+ return MakeExpr<ExprBoolean>(true);
+ });
+ if (branch.address < 0) {
+ if (branch.kill) {
+ mm.InsertReturn(get_expr(branch.condition), true);
+ return;
+ }
+ mm.InsertReturn(get_expr(branch.condition), false);
+ return;
+ }
+ mm.InsertGoto(get_expr(branch.condition), branch.address);
+}
+
+void DecompileShader(CFGRebuildState& state) {
+ state.manager->Init();
+ for (auto label : state.labels) {
+ state.manager->DeclareLabel(label);
+ }
+ for (auto& block : state.block_info) {
+ if (state.labels.count(block.start) != 0) {
+ state.manager->InsertLabel(block.start);
+ }
+ u32 end = block.branch.ignore ? block.end + 1 : block.end;
+ state.manager->InsertBlock(block.start, end);
+ if (!block.branch.ignore) {
+ InsertBranch(*state.manager, block.branch);
+ }
+ }
+ state.manager->Decompile();
+}
+
+std::unique_ptr<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code, u32 program_size,
+ u32 start_address,
+ const CompilerSettings& settings) {
+ auto result_out = std::make_unique<ShaderCharacteristics>();
+ if (settings.depth == CompileDepth::BruteForce) {
+ result_out->settings.depth = CompileDepth::BruteForce;
+ return result_out;
+ }
+ CFGRebuildState state{program_code, program_size, start_address};
// Inspect Code and generate blocks
state.labels.clear();
state.labels.emplace(start_address);
state.inspect_queries.push_back(state.start);
while (!state.inspect_queries.empty()) {
if (!TryInspectAddress(state)) {
- return {};
+ result_out->settings.depth = CompileDepth::BruteForce;
+ return result_out;
}
}
- // Decompile Stacks
- state.queries.push_back(Query{state.start, {}, {}});
- bool decompiled = true;
- while (!state.queries.empty()) {
- if (!TryQuery(state)) {
- decompiled = false;
- break;
+ bool use_flow_stack = true;
+
+ bool decompiled = false;
+
+ if (settings.depth != CompileDepth::FlowStack) {
+ // Decompile Stacks
+ state.queries.push_back(Query{state.start, {}, {}});
+ decompiled = true;
+ while (!state.queries.empty()) {
+ if (!TryQuery(state)) {
+ decompiled = false;
+ break;
+ }
}
}
+ use_flow_stack = !decompiled;
+
// Sort and organize results
std::sort(state.block_info.begin(), state.block_info.end(),
- [](const BlockInfo& a, const BlockInfo& b) { return a.start < b.start; });
- ShaderCharacteristics result_out{};
- result_out.decompilable = decompiled;
- result_out.start = start_address;
- result_out.end = start_address;
- for (const auto& block : state.block_info) {
+ [](const BlockInfo& a, const BlockInfo& b) -> bool { return a.start < b.start; });
+ if (decompiled && settings.depth != CompileDepth::NoFlowStack) {
+ ASTManager manager{settings.depth != CompileDepth::DecompileBackwards,
+ settings.disable_else_derivation};
+ state.manager = &manager;
+ DecompileShader(state);
+ decompiled = state.manager->IsFullyDecompiled();
+ if (!decompiled) {
+ if (settings.depth == CompileDepth::FullDecompile) {
+ LOG_CRITICAL(HW_GPU, "Failed to remove all the gotos!:");
+ } else {
+ LOG_CRITICAL(HW_GPU, "Failed to remove all backward gotos!:");
+ }
+ state.manager->ShowCurrentState("Of Shader");
+ state.manager->Clear();
+ } else {
+ auto characteristics = std::make_unique<ShaderCharacteristics>();
+ characteristics->start = start_address;
+ characteristics->settings.depth = settings.depth;
+ characteristics->manager = std::move(manager);
+ characteristics->end = state.block_info.back().end + 1;
+ return characteristics;
+ }
+ }
+
+ result_out->start = start_address;
+ result_out->settings.depth =
+ use_flow_stack ? CompileDepth::FlowStack : CompileDepth::NoFlowStack;
+ result_out->blocks.clear();
+ for (auto& block : state.block_info) {
ShaderBlock new_block{};
new_block.start = block.start;
new_block.end = block.end;
@@ -456,26 +553,26 @@ std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
new_block.branch.kills = block.branch.kill;
new_block.branch.address = block.branch.address;
}
- result_out.end = std::max(result_out.end, block.end);
- result_out.blocks.push_back(new_block);
+ result_out->end = std::max(result_out->end, block.end);
+ result_out->blocks.push_back(new_block);
}
- if (result_out.decompilable) {
- result_out.labels = std::move(state.labels);
- return {std::move(result_out)};
+ if (!use_flow_stack) {
+ result_out->labels = std::move(state.labels);
+ return result_out;
}
- // If it's not decompilable, merge the unlabelled blocks together
- auto back = result_out.blocks.begin();
+ auto back = result_out->blocks.begin();
auto next = std::next(back);
- while (next != result_out.blocks.end()) {
+ while (next != result_out->blocks.end()) {
if (state.labels.count(next->start) == 0 && next->start == back->end + 1) {
back->end = next->end;
- next = result_out.blocks.erase(next);
+ next = result_out->blocks.erase(next);
continue;
}
back = next;
++next;
}
- return {std::move(result_out)};
+
+ return result_out;
}
} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/control_flow.h b/src/video_core/shader/control_flow.h
index b0a5e4f8c..74e54a5c7 100644
--- a/src/video_core/shader/control_flow.h
+++ b/src/video_core/shader/control_flow.h
@@ -6,9 +6,11 @@
#include <list>
#include <optional>
-#include <unordered_set>
+#include <set>
#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/ast.h"
+#include "video_core/shader/compiler_settings.h"
#include "video_core/shader/shader_ir.h"
namespace VideoCommon::Shader {
@@ -67,13 +69,15 @@ struct ShaderBlock {
struct ShaderCharacteristics {
std::list<ShaderBlock> blocks{};
- bool decompilable{};
+ std::set<u32> labels{};
u32 start{};
u32 end{};
- std::unordered_set<u32> labels{};
+ ASTManager manager{true, true};
+ CompilerSettings settings{};
};
-std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
- std::size_t program_size, u32 start_address);
+std::unique_ptr<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code, u32 program_size,
+ u32 start_address,
+ const CompilerSettings& settings);
} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/decode.cpp b/src/video_core/shader/decode.cpp
index 47a9fd961..2626b1616 100644
--- a/src/video_core/shader/decode.cpp
+++ b/src/video_core/shader/decode.cpp
@@ -35,58 +35,138 @@ constexpr bool IsSchedInstruction(u32 offset, u32 main_offset) {
} // namespace
+class ASTDecoder {
+public:
+ ASTDecoder(ShaderIR& ir) : ir(ir) {}
+
+ void operator()(ASTProgram& ast) {
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ }
+
+ void operator()(ASTIfThen& ast) {
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ }
+
+ void operator()(ASTIfElse& ast) {
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ }
+
+ void operator()(ASTBlockEncoded& ast) {}
+
+ void operator()(ASTBlockDecoded& ast) {}
+
+ void operator()(ASTVarSet& ast) {}
+
+ void operator()(ASTLabel& ast) {}
+
+ void operator()(ASTGoto& ast) {}
+
+ void operator()(ASTDoWhile& ast) {
+ ASTNode current = ast.nodes.GetFirst();
+ while (current) {
+ Visit(current);
+ current = current->GetNext();
+ }
+ }
+
+ void operator()(ASTReturn& ast) {}
+
+ void operator()(ASTBreak& ast) {}
+
+ void Visit(ASTNode& node) {
+ std::visit(*this, *node->GetInnerData());
+ if (node->IsBlockEncoded()) {
+ auto block = std::get_if<ASTBlockEncoded>(node->GetInnerData());
+ NodeBlock bb = ir.DecodeRange(block->start, block->end);
+ node->TransformBlockEncoded(std::move(bb));
+ }
+ }
+
+private:
+ ShaderIR& ir;
+};
+
void ShaderIR::Decode() {
std::memcpy(&header, program_code.data(), sizeof(Tegra::Shader::Header));
- disable_flow_stack = false;
- const auto info = ScanFlow(program_code, program_size, main_offset);
- if (info) {
- const auto& shader_info = *info;
- coverage_begin = shader_info.start;
- coverage_end = shader_info.end;
- if (shader_info.decompilable) {
- disable_flow_stack = true;
- const auto insert_block = [this](NodeBlock& nodes, u32 label) {
- if (label == static_cast<u32>(exit_branch)) {
- return;
- }
- basic_blocks.insert({label, nodes});
- };
- const auto& blocks = shader_info.blocks;
- NodeBlock current_block;
- u32 current_label = static_cast<u32>(exit_branch);
- for (auto& block : blocks) {
- if (shader_info.labels.count(block.start) != 0) {
- insert_block(current_block, current_label);
- current_block.clear();
- current_label = block.start;
- }
- if (!block.ignore_branch) {
- DecodeRangeInner(current_block, block.start, block.end);
- InsertControlFlow(current_block, block);
- } else {
- DecodeRangeInner(current_block, block.start, block.end + 1);
- }
- }
- insert_block(current_block, current_label);
- return;
- }
- LOG_WARNING(HW_GPU, "Flow Stack Removing Failed! Falling back to old method");
- // we can't decompile it, fallback to standard method
+ decompiled = false;
+ auto info = ScanFlow(program_code, program_size, main_offset, settings);
+ auto& shader_info = *info;
+ coverage_begin = shader_info.start;
+ coverage_end = shader_info.end;
+ switch (shader_info.settings.depth) {
+ case CompileDepth::FlowStack: {
for (const auto& block : shader_info.blocks) {
basic_blocks.insert({block.start, DecodeRange(block.start, block.end + 1)});
}
- return;
+ break;
}
- LOG_WARNING(HW_GPU, "Flow Analysis Failed! Falling back to brute force compiling");
-
- // Now we need to deal with an undecompilable shader. We need to brute force
- // a shader that captures every position.
- coverage_begin = main_offset;
- const u32 shader_end = static_cast<u32>(program_size / sizeof(u64));
- coverage_end = shader_end;
- for (u32 label = main_offset; label < shader_end; label++) {
- basic_blocks.insert({label, DecodeRange(label, label + 1)});
+ case CompileDepth::NoFlowStack: {
+ disable_flow_stack = true;
+ const auto insert_block = [this](NodeBlock& nodes, u32 label) {
+ if (label == static_cast<u32>(exit_branch)) {
+ return;
+ }
+ basic_blocks.insert({label, nodes});
+ };
+ const auto& blocks = shader_info.blocks;
+ NodeBlock current_block;
+ u32 current_label = static_cast<u32>(exit_branch);
+ for (auto& block : blocks) {
+ if (shader_info.labels.count(block.start) != 0) {
+ insert_block(current_block, current_label);
+ current_block.clear();
+ current_label = block.start;
+ }
+ if (!block.ignore_branch) {
+ DecodeRangeInner(current_block, block.start, block.end);
+ InsertControlFlow(current_block, block);
+ } else {
+ DecodeRangeInner(current_block, block.start, block.end + 1);
+ }
+ }
+ insert_block(current_block, current_label);
+ break;
+ }
+ case CompileDepth::DecompileBackwards:
+ case CompileDepth::FullDecompile: {
+ program_manager = std::move(shader_info.manager);
+ disable_flow_stack = true;
+ decompiled = true;
+ ASTDecoder decoder{*this};
+ ASTNode program = GetASTProgram();
+ decoder.Visit(program);
+ break;
+ }
+ default:
+ LOG_CRITICAL(HW_GPU, "Unknown decompilation mode!");
+ [[fallthrough]];
+ case CompileDepth::BruteForce: {
+ coverage_begin = main_offset;
+ const u32 shader_end = static_cast<u32>(program_size / sizeof(u64));
+ coverage_end = shader_end;
+ for (u32 label = main_offset; label < shader_end; label++) {
+ basic_blocks.insert({label, DecodeRange(label, label + 1)});
+ }
+ break;
+ }
+ }
+ if (settings.depth != shader_info.settings.depth) {
+ LOG_WARNING(
+ HW_GPU, "Decompiling to this setting \"{}\" failed, downgrading to this setting \"{}\"",
+ CompileDepthAsString(settings.depth), CompileDepthAsString(shader_info.settings.depth));
}
}
diff --git a/src/video_core/shader/expr.cpp b/src/video_core/shader/expr.cpp
new file mode 100644
index 000000000..2647865d4
--- /dev/null
+++ b/src/video_core/shader/expr.cpp
@@ -0,0 +1,93 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <memory>
+#include <variant>
+
+#include "video_core/shader/expr.h"
+
+namespace VideoCommon::Shader {
+namespace {
+bool ExprIsBoolean(const Expr& expr) {
+ return std::holds_alternative<ExprBoolean>(*expr);
+}
+
+bool ExprBooleanGet(const Expr& expr) {
+ return std::get_if<ExprBoolean>(expr.get())->value;
+}
+} // Anonymous namespace
+
+bool ExprAnd::operator==(const ExprAnd& b) const {
+ return (*operand1 == *b.operand1) && (*operand2 == *b.operand2);
+}
+
+bool ExprAnd::operator!=(const ExprAnd& b) const {
+ return !operator==(b);
+}
+
+bool ExprOr::operator==(const ExprOr& b) const {
+ return (*operand1 == *b.operand1) && (*operand2 == *b.operand2);
+}
+
+bool ExprOr::operator!=(const ExprOr& b) const {
+ return !operator==(b);
+}
+
+bool ExprNot::operator==(const ExprNot& b) const {
+ return *operand1 == *b.operand1;
+}
+
+bool ExprNot::operator!=(const ExprNot& b) const {
+ return !operator==(b);
+}
+
+Expr MakeExprNot(Expr first) {
+ if (std::holds_alternative<ExprNot>(*first)) {
+ return std::get_if<ExprNot>(first.get())->operand1;
+ }
+ return MakeExpr<ExprNot>(std::move(first));
+}
+
+Expr MakeExprAnd(Expr first, Expr second) {
+ if (ExprIsBoolean(first)) {
+ return ExprBooleanGet(first) ? second : first;
+ }
+ if (ExprIsBoolean(second)) {
+ return ExprBooleanGet(second) ? first : second;
+ }
+ return MakeExpr<ExprAnd>(std::move(first), std::move(second));
+}
+
+Expr MakeExprOr(Expr first, Expr second) {
+ if (ExprIsBoolean(first)) {
+ return ExprBooleanGet(first) ? first : second;
+ }
+ if (ExprIsBoolean(second)) {
+ return ExprBooleanGet(second) ? second : first;
+ }
+ return MakeExpr<ExprOr>(std::move(first), std::move(second));
+}
+
+bool ExprAreEqual(const Expr& first, const Expr& second) {
+ return (*first) == (*second);
+}
+
+bool ExprAreOpposite(const Expr& first, const Expr& second) {
+ if (std::holds_alternative<ExprNot>(*first)) {
+ return ExprAreEqual(std::get_if<ExprNot>(first.get())->operand1, second);
+ }
+ if (std::holds_alternative<ExprNot>(*second)) {
+ return ExprAreEqual(std::get_if<ExprNot>(second.get())->operand1, first);
+ }
+ return false;
+}
+
+bool ExprIsTrue(const Expr& first) {
+ if (ExprIsBoolean(first)) {
+ return ExprBooleanGet(first);
+ }
+ return false;
+}
+
+} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/expr.h b/src/video_core/shader/expr.h
new file mode 100644
index 000000000..d3dcd00ec
--- /dev/null
+++ b/src/video_core/shader/expr.h
@@ -0,0 +1,139 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <variant>
+
+#include "video_core/engines/shader_bytecode.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::ConditionCode;
+using Tegra::Shader::Pred;
+
+class ExprAnd;
+class ExprBoolean;
+class ExprCondCode;
+class ExprNot;
+class ExprOr;
+class ExprPredicate;
+class ExprVar;
+
+using ExprData =
+ std::variant<ExprVar, ExprCondCode, ExprPredicate, ExprNot, ExprOr, ExprAnd, ExprBoolean>;
+using Expr = std::shared_ptr<ExprData>;
+
+class ExprAnd final {
+public:
+ explicit ExprAnd(Expr a, Expr b) : operand1{std::move(a)}, operand2{std::move(b)} {}
+
+ bool operator==(const ExprAnd& b) const;
+ bool operator!=(const ExprAnd& b) const;
+
+ Expr operand1;
+ Expr operand2;
+};
+
+class ExprOr final {
+public:
+ explicit ExprOr(Expr a, Expr b) : operand1{std::move(a)}, operand2{std::move(b)} {}
+
+ bool operator==(const ExprOr& b) const;
+ bool operator!=(const ExprOr& b) const;
+
+ Expr operand1;
+ Expr operand2;
+};
+
+class ExprNot final {
+public:
+ explicit ExprNot(Expr a) : operand1{std::move(a)} {}
+
+ bool operator==(const ExprNot& b) const;
+ bool operator!=(const ExprNot& b) const;
+
+ Expr operand1;
+};
+
+class ExprVar final {
+public:
+ explicit ExprVar(u32 index) : var_index{index} {}
+
+ bool operator==(const ExprVar& b) const {
+ return var_index == b.var_index;
+ }
+
+ bool operator!=(const ExprVar& b) const {
+ return !operator==(b);
+ }
+
+ u32 var_index;
+};
+
+class ExprPredicate final {
+public:
+ explicit ExprPredicate(u32 predicate) : predicate{predicate} {}
+
+ bool operator==(const ExprPredicate& b) const {
+ return predicate == b.predicate;
+ }
+
+ bool operator!=(const ExprPredicate& b) const {
+ return !operator==(b);
+ }
+
+ u32 predicate;
+};
+
+class ExprCondCode final {
+public:
+ explicit ExprCondCode(ConditionCode cc) : cc{cc} {}
+
+ bool operator==(const ExprCondCode& b) const {
+ return cc == b.cc;
+ }
+
+ bool operator!=(const ExprCondCode& b) const {
+ return !operator==(b);
+ }
+
+ ConditionCode cc;
+};
+
+class ExprBoolean final {
+public:
+ explicit ExprBoolean(bool val) : value{val} {}
+
+ bool operator==(const ExprBoolean& b) const {
+ return value == b.value;
+ }
+
+ bool operator!=(const ExprBoolean& b) const {
+ return !operator==(b);
+ }
+
+ bool value;
+};
+
+template <typename T, typename... Args>
+Expr MakeExpr(Args&&... args) {
+ static_assert(std::is_convertible_v<T, ExprData>);
+ return std::make_shared<ExprData>(T(std::forward<Args>(args)...));
+}
+
+bool ExprAreEqual(const Expr& first, const Expr& second);
+
+bool ExprAreOpposite(const Expr& first, const Expr& second);
+
+Expr MakeExprNot(Expr first);
+
+Expr MakeExprAnd(Expr first, Expr second);
+
+Expr MakeExprOr(Expr first, Expr second);
+
+bool ExprIsTrue(const Expr& first);
+
+} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/shader_ir.cpp b/src/video_core/shader/shader_ir.cpp
index 2c357f310..c1f2b88c8 100644
--- a/src/video_core/shader/shader_ir.cpp
+++ b/src/video_core/shader/shader_ir.cpp
@@ -22,8 +22,10 @@ using Tegra::Shader::PredCondition;
using Tegra::Shader::PredOperation;
using Tegra::Shader::Register;
-ShaderIR::ShaderIR(const ProgramCode& program_code, u32 main_offset, const std::size_t size)
- : program_code{program_code}, main_offset{main_offset}, program_size{size} {
+ShaderIR::ShaderIR(const ProgramCode& program_code, u32 main_offset, const std::size_t size,
+ CompilerSettings settings)
+ : program_code{program_code}, main_offset{main_offset}, program_size{size}, basic_blocks{},
+ program_manager{true, true}, settings{settings} {
Decode();
}
@@ -137,7 +139,7 @@ Node ShaderIR::GetOutputAttribute(Attribute::Index index, u64 element, Node buff
return MakeNode<AbufNode>(index, static_cast<u32>(element), std::move(buffer));
}
-Node ShaderIR::GetInternalFlag(InternalFlag flag, bool negated) {
+Node ShaderIR::GetInternalFlag(InternalFlag flag, bool negated) const {
const Node node = MakeNode<InternalFlagNode>(flag);
if (negated) {
return Operation(OperationCode::LogicalNegate, node);
@@ -367,13 +369,13 @@ OperationCode ShaderIR::GetPredicateCombiner(PredOperation operation) {
return op->second;
}
-Node ShaderIR::GetConditionCode(Tegra::Shader::ConditionCode cc) {
+Node ShaderIR::GetConditionCode(Tegra::Shader::ConditionCode cc) const {
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));
+ return MakeNode<PredicateNode>(Pred::NeverExecute, false);
}
}
diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h
index 6f666ee30..105981d67 100644
--- a/src/video_core/shader/shader_ir.h
+++ b/src/video_core/shader/shader_ir.h
@@ -15,6 +15,8 @@
#include "video_core/engines/maxwell_3d.h"
#include "video_core/engines/shader_bytecode.h"
#include "video_core/engines/shader_header.h"
+#include "video_core/shader/ast.h"
+#include "video_core/shader/compiler_settings.h"
#include "video_core/shader/node.h"
namespace VideoCommon::Shader {
@@ -64,7 +66,8 @@ struct GlobalMemoryUsage {
class ShaderIR final {
public:
- explicit ShaderIR(const ProgramCode& program_code, u32 main_offset, std::size_t size);
+ explicit ShaderIR(const ProgramCode& program_code, u32 main_offset, std::size_t size,
+ CompilerSettings settings);
~ShaderIR();
const std::map<u32, NodeBlock>& GetBasicBlocks() const {
@@ -144,11 +147,31 @@ public:
return disable_flow_stack;
}
+ bool IsDecompiled() const {
+ return decompiled;
+ }
+
+ const ASTManager& GetASTManager() const {
+ return program_manager;
+ }
+
+ ASTNode GetASTProgram() const {
+ return program_manager.GetProgram();
+ }
+
+ u32 GetASTNumVariables() const {
+ return program_manager.GetVariables();
+ }
+
u32 ConvertAddressToNvidiaSpace(const u32 address) const {
return (address - main_offset) * sizeof(Tegra::Shader::Instruction);
}
+ /// Returns a condition code evaluated from internal flags
+ Node GetConditionCode(Tegra::Shader::ConditionCode cc) const;
+
private:
+ friend class ASTDecoder;
void Decode();
NodeBlock DecodeRange(u32 begin, u32 end);
@@ -213,7 +236,7 @@ private:
/// Generates a node representing an output attribute. 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);
+ Node GetInternalFlag(InternalFlag flag, bool negated = false) const;
/// Generates a node representing a local memory address
Node GetLocalMemory(Node address);
/// Generates a node representing a shared memory address
@@ -271,9 +294,6 @@ private:
/// 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);
@@ -357,6 +377,7 @@ private:
const ProgramCode& program_code;
const u32 main_offset;
const std::size_t program_size;
+ bool decompiled{};
bool disable_flow_stack{};
u32 coverage_begin{};
@@ -364,6 +385,8 @@ private:
std::map<u32, NodeBlock> basic_blocks;
NodeBlock global_code;
+ ASTManager program_manager;
+ CompilerSettings settings{};
std::set<u32> used_registers;
std::set<Tegra::Shader::Pred> used_predicates;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 04:13:04 +0100