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shader: decode s_dcache_inv as a no-op

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Claxten authored and nmzik committed 2026-10-27 04:23:01 +01:00
1 parent 95a507a8ff
commit 91a5ff6cb7
5 files changed
+17 -7
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tests/shaderCfgTests.cpp
+9 -6
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@@ -2001,18 +2001,21 @@ void TestNggVertexEntryState() {
void TestNativeDataCacheInvalidation() {
using namespace ShaderRecompiler;
// Captured f5edf70dbb1f6057:0x194 and 0x1a4, each followed by S_WAITCNT.
// Captured f5edf70dbb1f6057:0x194 and 0x1a4, each followed by S_WAITCNT. The S_DCACHE_INV
// after them emits no fence.
const std::array cache_ops = {0xe1c40000u, 0u, 0xbf8c0000u,
0xe1c80000u, 0u, 0xbf8c0000u, EncodeSopp(0x01)};
0xe1c80000u, 0u, 0xbf8c0000u,
0xf4800000u, 0xfa000000u, EncodeSopp(0x01)};
Decoder::Program decoded;
Decoder::DecodeProgram(cache_ops, decoded);
for (const uint32_t index : {0u, 2u}) {
for (const auto [index, opcode] : {std::pair{0u, Decoder::Opcode::BUFFER_GL0_INV},
std::pair{2u, Decoder::Opcode::BUFFER_GL1_INV},
std::pair{4u, Decoder::Opcode::S_DCACHE_INV}}) {
const auto &inst = decoded.instructions[index];
Check(inst.opcode == (index == 0 ? Decoder::Opcode::BUFFER_GL0_INV
: Decoder::Opcode::BUFFER_GL1_INV) &&
Check(inst.opcode == opcode &&
inst.word_count == 2 && inst.src_count == 0 && inst.data_dwords == 0 &&
inst.dst.kind == Decoder::OperandKind::Unknown,
"RDNA2 cache invalidation acquired a buffer operand or lost its encoding");
"RDNA2 cache invalidation acquired an operand or lost its encoding");
}
auto options = MakeCompileOptions(ShaderType::Compute);