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improvements requested by squidbus

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This commit is contained in:
Fire Cube 2025-04-21 22:54:52 +02:00
parent 5d112cf68f
commit 2f059fab00
3 changed files with 15 additions and 6 deletions
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18
src/shader_recompiler/frontend/control_flow_graph.cpp
View File

@ -70,8 +70,9 @@ static bool IgnoresExecMask(const GcnInst& inst) {
static std::optional<u32> ResolveSetPcTarget(std::span<const GcnInst> list, u32 setpc_index,
std::span<const u32> pc_map) {
if (setpc_index < 3)
if (setpc_index < 3) {
return std::nullopt;
}
const auto& getpc = list[setpc_index - 3];
const auto& arith = list[setpc_index - 2];
@ -96,7 +97,7 @@ static std::optional<u32> ResolveSetPcTarget(std::span<const GcnInst> list, u32
const u32 base_pc = pc_map[setpc_index - 3] + getpc.length;
const u32 result_pc = static_cast<u32>(static_cast<s32>(base_pc) + signed_offset);
LOG_INFO(Render_Recompiler, "SetPC target: {} + {} = {}", base_pc, signed_offset, result_pc);
LOG_DEBUG(Render_Recompiler, "SetPC target: {} + {} = {}", base_pc, signed_offset, result_pc);
return result_pc & ~0x3u;
}
@ -124,10 +125,18 @@ void CFG::EmitLabels() {
if (inst.IsUnconditionalBranch()) {
u32 target = inst.BranchTarget(pc);
if (inst.opcode == Opcode::S_SETPC_B64) {
if (auto t = ResolveSetPcTarget(inst_list, i, index_to_pc))
if (auto t = ResolveSetPcTarget(inst_list, i, index_to_pc)) {
target = *t;
} else {
ASSERT_MSG(
false,
"S_SETPC_B64 without a resolvable offset at PC {:#x} (Index {}): Involved "
"instructions not recognized or invalid pattern",
pc, i);
}
}
AddLabel(target);
// Emit this label so that the block ends with the branching instruction
AddLabel(pc + inst.length);
} else if (inst.IsConditionalBranch()) {
const u32 true_label = inst.BranchTarget(pc);
@ -135,7 +144,8 @@ void CFG::EmitLabels() {
AddLabel(true_label);
AddLabel(false_label);
} else if (inst.opcode == Opcode::S_ENDPGM) {
AddLabel(pc + inst.length);
const u32 next_label = pc + inst.length;
AddLabel(next_label);
}
pc += inst.length;

2
src/shader_recompiler/frontend/instruction.cpp
View File

@ -18,7 +18,7 @@ bool GcnInst::IsTerminateInstruction() const {
}
bool GcnInst::IsUnconditionalBranch() const {
return opcode == Opcode::S_BRANCH or opcode == Opcode::S_SETPC_B64;
return opcode == Opcode::S_BRANCH || opcode == Opcode::S_SETPC_B64;
}
bool GcnInst::IsFork() const {

1
src/shader_recompiler/frontend/translate/scalar_flow.cpp
View File

@ -19,7 +19,6 @@ void Translator::EmitFlowControl(u32 pc, const GcnInst& inst) {
case Opcode::S_GETPC_B64:
return S_GETPC_B64(pc, inst);
case Opcode::S_SETPC_B64:
return;
case Opcode::S_WAITCNT:
case Opcode::S_NOP:
case Opcode::S_ENDPGM: