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shader: decode RDNA2 bit-reverse SDWA source selectors

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Co-authored-by: TheCruZ <thecruzwtf@gmail.com>
This commit is contained in:
nmzik
2026-10-04 01:59:45 +04:00
parent ec3e48cdde
commit d890bb190c
3 changed files with 55 additions and 0 deletions
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tests/ShaderRecompilerComputeTests.cpp
+32
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@@ -20361,6 +20361,36 @@ TestCase VectorFfbhI32NativeAndVop3OnGpu() {
return test;
}
TestCase Vop1SdwaBfrevSourceSelectors() {
using O = ShaderOpcode;
constexpr u32 expected[2][7] = {
{0x8f000000u, 0xd5000000u, 0x21000000u, 0x49000000u,
0x8fd50000u, 0x21490000u, 0x8fd52149u},
{0x8fffffffu, 0xd5ffffffu, 0x21ffffffu, 0x49ffffffu,
0x8fd5ffffu, 0x2149ffffu, 0x8fd52149u}};
TestCase test;
test.name = "Vop1SdwaBfrevSourceSelectors";
for (u32 sext = 0; sext < 2; sext++) {
for (u32 selector = 0; selector < 7; selector++) {
const u32 index = static_cast<u32>(test.initial.size());
AppendVMovU32(&test.code, 30, index * 4u);
AppendBufferLoadDword(&test.code, 0, 30);
// selector=4, sext=0 reproduces captured words 7e0070f9, 00040600.
test.code.insert(test.code.end(),
{0x7e0070f9u, EncodeVop1Sdwa(0, 6, 0, selector, sext)});
AppendStoreVgpr(&test.code, 0, index);
test.initial.push_back(0x9284abf1u);
test.expected.push_back(expected[sext][selector]);
}
}
AppendEnd(&test.code);
test.opcodes = {O::V_MOV_B32, O::BUFFER_LOAD_DWORD, O::V_BFREV_B32,
O::BUFFER_STORE_DWORD, O::S_ENDPGM};
test.decoded_counts = {{"V_BFREV_B32 v0, v0.sdwa(sel=4,sext=0)", 1}};
test.required_spirv = {"OpBitFieldUExtract", "OpBitFieldSExtract", "OpBitReverse"};
return test;
}
TestCase Vop1SdwaFfbhCapturedScalarLowWordSource() {
using O = ShaderOpcode;
@@ -32274,6 +32304,7 @@ std::vector<TestCase> MakeCases() {
AddCase(VectorVop3MoveAppliesFloatSourceModifiers);
AddCase(VectorIntegerOps);
AddCase(VectorFfbhI32NativeAndVop3OnGpu);
AddCase(Vop1SdwaBfrevSourceSelectors);
AddCase(Vop1SdwaFfbhCapturedScalarLowWordSource);
AddCase(Vop1SdwaFfblCapturedHighWordSource);
AddCase(Vop1SdwaNotCapturedByte0Source);
@@ -37751,6 +37782,7 @@ int main(int argc, char **argv) {
}
if (argc == 2 && std::strcmp(argv[1], "--sdwa-ffbh-only") == 0) {
VulkanHarness vulkan;
RunCase(&vulkan, Vop1SdwaBfrevSourceSelectors());
RunCase(&vulkan, Vop1SdwaFfbhCapturedScalarLowWordSource());
RunCase(&vulkan, VectorFfbhI32NativeAndVop3OnGpu());
RunCase(&vulkan, Vop1SdwaFfblCapturedHighWordSource());