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[a64] Implement OPCODE_VECTOR_ROTATE_LEFT

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Uses the emulated fallback for now. Will have to come back to this later. Passes unit tests.
This commit is contained in:
Wunkolo 2024-05-04 11:59:30 -07:00
parent 7feea4c60c
commit 3ac51212a6
1 changed files with 43 additions and 1 deletions
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44
src/xenia/cpu/backend/a64/a64_seq_vector.cc
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@ -746,10 +746,52 @@ EMITTER_OPCODE_TABLE(OPCODE_VECTOR_SHA, VECTOR_SHA_V128);
// ============================================================================
// OPCODE_VECTOR_ROTATE_LEFT
// ============================================================================
template <typename T, std::enable_if_t<std::is_integral<T>::value, int> = 0>
static uint8x16_t EmulateVectorRotateLeft(void*, std::byte src1[16],
std::byte src2[16]) {
alignas(16) T value[16 / sizeof(T)];
alignas(16) T shamt[16 / sizeof(T)];
// Load NEON registers into a C array.
vst1q_u8(reinterpret_cast<T*>(value), vld1q_u8(src1));
vst1q_u8(reinterpret_cast<T*>(shamt), vld1q_u8(src2));
for (size_t i = 0; i < (16 / sizeof(T)); ++i) {
value[i] = xe::rotate_left<T>(value[i], shamt[i] & ((sizeof(T) * 8) - 1));
}
// Store result and return it.
return vld1q_u8(value);
}
struct VECTOR_ROTATE_LEFT_V128
: Sequence<VECTOR_ROTATE_LEFT_V128,
I<OPCODE_VECTOR_ROTATE_LEFT, V128Op, V128Op, V128Op>> {
static void Emit(A64Emitter& e, const EmitArgType& i) {}
static void Emit(A64Emitter& e, const EmitArgType& i) {
if (i.src2.is_constant) {
e.ADD(e.GetNativeParam(1), XSP, e.StashConstantV(1, i.src2.constant()));
} else {
e.ADD(e.GetNativeParam(1), XSP, e.StashV(1, i.src2));
}
e.ADD(e.GetNativeParam(0), XSP, e.StashV(0, i.src1));
switch (i.instr->flags) {
case INT8_TYPE:
e.CallNativeSafe(
reinterpret_cast<void*>(EmulateVectorRotateLeft<uint8_t>));
break;
case INT16_TYPE:
e.CallNativeSafe(
reinterpret_cast<void*>(EmulateVectorRotateLeft<uint16_t>));
break;
case INT32_TYPE:
e.CallNativeSafe(
reinterpret_cast<void*>(EmulateVectorRotateLeft<uint32_t>));
break;
default:
assert_always();
break;
}
e.MOV(i.dest.reg().B16(), Q0.B16());
}
};
EMITTER_OPCODE_TABLE(OPCODE_VECTOR_ROTATE_LEFT, VECTOR_ROTATE_LEFT_V128);