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[a64] Implement OPCODE_VECTOR_SHA

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This commit is contained in:
Wunkolo 2024-05-03 17:55:28 -07:00
parent 72380bf833
commit 67706824c6
1 changed files with 39 additions and 1 deletions
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40
src/xenia/cpu/backend/a64/a64_seq_vector.cc
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@ -486,6 +486,22 @@ EMITTER_OPCODE_TABLE(OPCODE_VECTOR_SHR, VECTOR_SHR_V128);
// ============================================================================
// OPCODE_VECTOR_SHA
// ============================================================================
template <typename T, std::enable_if_t<std::is_integral<T>::value, int> = 0>
static uint8x16_t EmulateVectorShr(void*, uint8x16_t src1, uint8x16_t src2) {
alignas(16) T value[16 / sizeof(T)];
alignas(16) T shamt[16 / sizeof(T)];
// Load SSE registers into a C array.
vst1q_u8(reinterpret_cast<T*>(value), src1);
vst1q_u8(reinterpret_cast<T*>(shamt), src2);
for (size_t i = 0; i < (16 / sizeof(T)); ++i) {
value[i] = value[i] >> (shamt[i] & ((sizeof(T) * 8) - 1));
}
// Store result and return it.
return vld1q_f32(value);
}
struct VECTOR_SHA_V128
: Sequence<VECTOR_SHA_V128, I<OPCODE_VECTOR_SHA, V128Op, V128Op, V128Op>> {
static void Emit(A64Emitter& e, const EmitArgType& i) {
@ -505,7 +521,29 @@ struct VECTOR_SHA_V128
}
}
static void EmitInt8(A64Emitter& e, const EmitArgType& i) {}
static void EmitInt8(A64Emitter& e, const EmitArgType& i) {
if (i.src2.is_constant) {
const auto& shamt = i.src2.constant();
bool all_same = true;
for (size_t n = 0; n < 16 - n; ++n) {
if (shamt.u8[n] != shamt.u8[n + 1]) {
all_same = false;
break;
}
}
if (all_same) {
// Every count is the same, so we can use SSHR
e.SSHR(i.dest.reg().B16(), i.src1.reg().B16(), shamt.u8[0]);
return;
}
e.LDR(e.GetNativeParam(1), XSP, e.StashConstantV(1, i.src2.constant()));
} else {
e.LDR(e.GetNativeParam(1), XSP, e.StashV(1, i.src2));
}
e.LDR(e.GetNativeParam(0), XSP, e.StashV(0, i.src1));
e.CallNativeSafe(reinterpret_cast<void*>(EmulateVectorShr<int8_t>));
e.MOV(i.dest.reg().B16(), Q0.B16());
}
static void EmitInt16(A64Emitter& e, const EmitArgType& i) {}