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shader: snapshot wide SMEM sources before writes

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This commit is contained in:
nmzik
2026-08-15 14:09:02 +02:00
parent 28a913894d
commit f453a752bb
5 changed files with 135 additions and 46 deletions
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src/graphics/shader/recompiler/frontend/translate/Translate.cpp
+19 -4
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@@ -671,9 +671,12 @@ void Translator::WriteCompareResult(const IR::Operand& operand, IR::U1 value) {
}
bool Translator::TranslateBlock(const IR::BasicBlock& source, std::string* error) {
BufferAddressValues buffer_address_snapshot {};
uint32_t buffer_address_pc = 0;
bool has_buffer_address_snapshot = false;
BufferAddressValues buffer_address_snapshot {};
ScalarMemorySourceValues scalar_source_snapshot {};
uint32_t buffer_address_pc = 0;
uint32_t scalar_source_pc = 0;
bool has_buffer_address_snapshot = false;
bool has_scalar_source_snapshot = false;
for (const auto& source_inst: source.instructions) {
current_opcode = source_inst.op;
current_pc = source_inst.pc;
@@ -688,11 +691,23 @@ bool Translator::TranslateBlock(const IR::BasicBlock& source, std::string* error
} else if (!grouped_buffer_load) {
has_buffer_address_snapshot = false;
}
const bool grouped_scalar_load =
IsScalarMemoryLoadOperation(source_inst.op) && source_inst.memory.component_count > 1u;
if (grouped_scalar_load &&
(!has_scalar_source_snapshot || scalar_source_pc != source_inst.pc ||
source_inst.memory.component_index == 0u)) {
scalar_source_snapshot = ReadScalarMemorySource(source_inst);
scalar_source_pc = source_inst.pc;
has_scalar_source_snapshot = true;
} else if (!grouped_scalar_load) {
has_scalar_source_snapshot = false;
}
if (static_cast<size_t>(source_inst.op) >= static_cast<size_t>(IR::Opcode::Count)) {
return Fail(error, "value IR input opcode is out of range");
}
if (TranslateInstruction(source_inst,
grouped_buffer_load ? &buffer_address_snapshot : nullptr)) {
grouped_buffer_load ? &buffer_address_snapshot : nullptr,
grouped_scalar_load ? &scalar_source_snapshot : nullptr)) {
continue;
}
return Fail(error, fmt::format("opcode {} at 0x{:08x} has no typed Value IR lowering",