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shader: share direct and conditional branch classification

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This commit is contained in:
nmzik
2026-09-09 18:56:56 +04:00
parent ae573f941a
commit 3902b42096
4 changed files with 26 additions and 52 deletions
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src/graphics/shader/recompiler/frontend/cfg/ShaderCFG.cpp
+3 -23
View File
@@ -52,26 +52,6 @@ uint32_t ProgramEndPc(const Decoder::Program& program) {
return InstructionEndPc(program.instructions.back());
}
bool IsUnconditionalBranch(Opcode opcode) {
return opcode == Opcode::S_BRANCH;
}
bool IsConditionalBranch(Opcode opcode) {
switch (opcode) {
case Opcode::S_CBRANCH_SCC0:
case Opcode::S_CBRANCH_SCC1:
case Opcode::S_CBRANCH_VCCZ:
case Opcode::S_CBRANCH_VCCNZ:
case Opcode::S_CBRANCH_EXECZ:
case Opcode::S_CBRANCH_EXECNZ: return true;
default: return false;
}
}
bool IsBranch(Opcode opcode) {
return IsUnconditionalBranch(opcode) || IsConditionalBranch(opcode);
}
BranchCondition ConditionForOpcode(Opcode opcode) {
switch (opcode) {
case Opcode::S_BRANCH: return BranchCondition::Always;
@@ -1925,7 +1905,7 @@ Graph BuildGraph(const Decoder::Program& program) {
for (uint32_t i = 0; i < program.instructions.size(); i++) {
const auto& inst = program.instructions[i];
const auto next_pc = InstructionEndPc(inst);
if (IsBranch(inst.opcode)) {
if (Decoder::IsDirectBranch(inst.opcode)) {
if (!IsValidTarget(inst.branch_target, instruction_pcs, first_pc, end_pc)) {
ExitBuildFailure(graph, FailureKind::InvalidBranchTarget, UINT32_MAX,
fmt::format("branch at pc 0x{:08x} targets invalid pc 0x{:08x}",
@@ -2032,11 +2012,11 @@ Graph BuildGraph(const Decoder::Program& program) {
block.terminator.condition = BranchCondition::Always;
block.terminator.true_block = pc_to_block.at(target_info.target);
}
} else if (IsUnconditionalBranch(last.opcode)) {
} else if (last.opcode == Opcode::S_BRANCH) {
block.terminator.kind = TerminatorKind::Branch;
block.terminator.condition = BranchCondition::Always;
block.terminator.true_block = pc_to_block.at(last.branch_target);
} else if (IsConditionalBranch(last.opcode)) {
} else if (Decoder::IsConditionalBranch(last.opcode)) {
block.terminator.kind = TerminatorKind::ConditionalBranch;
block.terminator.condition = ConditionForOpcode(last.opcode);
block.terminator.true_block = pc_to_block.at(last.branch_target);
src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.cpp
+17 -14
View File
@@ -25,19 +25,6 @@ bool HasLiteral(const Instruction& inst) {
inst.src3.kind == OperandKind::LiteralConstant;
}
bool IsControlFlowBranch(Opcode opcode) {
switch (opcode) {
case Opcode::S_BRANCH:
case Opcode::S_CBRANCH_SCC0:
case Opcode::S_CBRANCH_SCC1:
case Opcode::S_CBRANCH_VCCZ:
case Opcode::S_CBRANCH_VCCNZ:
case Opcode::S_CBRANCH_EXECZ:
case Opcode::S_CBRANCH_EXECNZ: return true;
default: return false;
}
}
void ApplyLiteral(Operand& operand, uint32_t literal) {
if (operand.kind == OperandKind::LiteralConstant) {
operand.value = literal;
@@ -198,6 +185,22 @@ std::string FormatExp(const Instruction& inst) {
} // namespace
bool IsConditionalBranch(Opcode opcode) {
switch (opcode) {
case Opcode::S_CBRANCH_SCC0:
case Opcode::S_CBRANCH_SCC1:
case Opcode::S_CBRANCH_VCCZ:
case Opcode::S_CBRANCH_VCCNZ:
case Opcode::S_CBRANCH_EXECZ:
case Opcode::S_CBRANCH_EXECNZ: return true;
default: return false;
}
}
bool IsDirectBranch(Opcode opcode) {
return opcode == Opcode::S_BRANCH || IsConditionalBranch(opcode);
}
const char* ImageDimensionToString(ImageDimension dimension) {
switch (dimension) {
case ImageDimension::Dim1D: return "1d";
@@ -389,7 +392,7 @@ void DecodeProgram(std::span<const uint32_t> code, Program& program) {
const auto& inst = program.instructions.back();
word_index += inst.word_count;
if (IsControlFlowBranch(inst.opcode)) {
if (IsDirectBranch(inst.opcode)) {
const auto target_index = inst.branch_target / sizeof(uint32_t);
if (branch_targets.empty()) {
branch_targets.resize(code.size());
src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.h
+2
View File
@@ -717,6 +717,8 @@ Family GetInstructionFamily(uint32_t word);
// The output object must be freshly initialized.
void DecodeInstruction(std::span<const uint32_t> code, uint32_t word_index, Instruction& inst);
void DecodeProgram(std::span<const uint32_t> code, Program& program);
bool IsConditionalBranch(Opcode opcode);
bool IsDirectBranch(Opcode opcode);
void DecodeScalarSource(uint32_t code, uint32_t pc, Operand& operand);
void DecodeScalarDestination(uint32_t code, uint32_t pc, Operand& operand);