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shader: V_CMPX_CLASS_F32

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This commit is contained in:
nmzik
2026-08-30 14:32:07 +04:00
parent e500333bcd
commit 39ee9972b8
7 changed files with 107 additions and 6 deletions
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tests/shaderCfgTests.cpp
+62
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@@ -4231,6 +4231,67 @@ void TestNewShaderRecompilerRejectsDppOn64BitCompares() {
}
}
void TestNewShaderRecompilerCapturedVopcSdwaCmpxClass() {
using namespace ShaderRecompiler;
const uint32_t shader[] = {
0x7d30d4f9u, 0x8606000du, // v_cmpx_class_f32 exec, v13, vcc_lo (SDWA)
EncodeSopp(0x01),
};
Decoder::Instruction decoded;
std::string error;
Check(Decoder::DecodeInstruction(shader, 0u, decoded, &error),
error.c_str());
Check(decoded.family == Decoder::Family::VOPC &&
decoded.opcode == Decoder::Opcode::V_CMPX_CLASS_F32 &&
decoded.opcode_id == 0x98u && decoded.word_count == 2u &&
decoded.raw_count == 2u &&
decoded.dst.kind == Decoder::OperandKind::ExecLo &&
decoded.src_count == 2u &&
decoded.src0.kind == Decoder::OperandKind::Vgpr &&
decoded.src0.reg == 13u && decoded.src0.sdwa_sel == 6u &&
decoded.src1.kind == Decoder::OperandKind::VccLo &&
decoded.src1.sdwa_sel == 6u,
"decoder rejected captured SDWA V_CMPX_CLASS_F32 fields");
Decoder::Program program;
CFG::Graph graph;
IR::Program ir;
ShaderPixelInputInfo pixel{};
Frontend::TranslateOptions translate_options{};
translate_options.stage = ShaderType::Pixel;
translate_options.wave_size = 64u;
translate_options.pixel = &pixel;
Check(Decoder::DecodeProgram(shader, program, &error) &&
CFG::BuildGraph(program, graph, &error) &&
Frontend::TranslateProgram(program, graph, translate_options, ir,
&error),
error.c_str());
uint32_t class_compares = 0u;
uint32_t dynamic_exec_writes = 0u;
for (const auto *block : ir.blocks) {
for (const auto &inst : *block) {
class_compares +=
inst.GetOpcode() == IR::ValueOpcode::FPCmpClass32 ? 1u : 0u;
if (inst.GetOpcode() == IR::ValueOpcode::SetExec &&
!inst.Arg(0).Resolve().IsImmediate()) {
dynamic_exec_writes++;
}
}
}
Check(class_compares == 1u && dynamic_exec_writes == 1u,
"captured V_CMPX_CLASS_F32 did not lower to class compare plus EXEC update");
auto options = MakeCompileOptions(ShaderType::Pixel);
CompileResult result;
Check(TryRecompile(shader, options, result, &error), error.c_str());
Check(Common::ContainsStr(result.decoded_dump,
"V_CMPX_CLASS_F32 exec_lo, v13, vcc_lo"),
"captured SDWA V_CMPX_CLASS_F32 was not present in the decoded dump");
CheckSpirvBinaryValidates(result.spirv);
}
void TestNewShaderRecompilerIrLookupMissFailsExplicitly() {
ShaderRecompiler::Decoder::Program decoded;
ShaderRecompiler::Decoder::Instruction missing;
@@ -12476,6 +12537,7 @@ int main() {
// ShaderRecompilerComputeTests; keep the distinct decoder contract checks
// here.
TestNewShaderDecoderArchitecture();
TestNewShaderRecompilerCapturedVopcSdwaCmpxClass();
TestNewShaderRecompilerRejectsDppOn64BitCompares();
TestNewShaderRecompilerIrLookupMissFailsExplicitly();
TestPsInputCountRegisterDecode();