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[a64] Implement `OPCODE_PACK`(SHORT) 

Fails unit tests due to subtle rounding errors

`SHORT_4` unit-test is missing but implementation is the same as `SHORT_4`
This commit is contained in:
Wunkolo 2024-05-04 12:59:01 -07:00
parent 3b2612bfc0
commit e5fd3d340c
1 changed files with 20 additions and 2 deletions
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22
src/xenia/cpu/backend/a64/a64_seq_vector.cc
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@ -1175,8 +1175,26 @@ struct PACK : Sequence<PACK, I<OPCODE_PACK, V128Op, V128Op, V128Op>> {
e.CallNativeSafe(reinterpret_cast<void*>(EmulateFLOAT16_4)); e.CallNativeSafe(reinterpret_cast<void*>(EmulateFLOAT16_4));
e.MOV(i.dest.reg().B16(), Q0.B16()); e.MOV(i.dest.reg().B16(), Q0.B16());
} }
static void EmitSHORT_2(A64Emitter& e, const EmitArgType& i) {} static void EmitSHORT_2(A64Emitter& e, const EmitArgType& i) {
static void EmitSHORT_4(A64Emitter& e, const EmitArgType& i) {} QReg src = i.src1;
if (i.src1.is_constant) {
src = i.dest;
e.LoadConstantV(src, i.src1.constant());
}
e.SQSHRN(i.dest.reg().toD().H4(), src.S4(), 8);
e.EXT(i.dest.reg().B16(), i.dest.reg().B16(), i.dest.reg().B16(), 4);
e.REV32(i.dest.reg().H8(), i.dest.reg().H8());
}
static void EmitSHORT_4(A64Emitter& e, const EmitArgType& i) {
QReg src = i.src1;
if (i.src1.is_constant) {
src = i.dest;
e.LoadConstantV(src, i.src1.constant());
}
e.SQSHRN(i.dest.reg().toD().H4(), src.S4(), 8);
e.EXT(i.dest.reg().B16(), i.dest.reg().B16(), i.dest.reg().B16(), 4);
e.REV32(i.dest.reg().H8(), i.dest.reg().H8());
}
static void EmitUINT_2101010(A64Emitter& e, const EmitArgType& i) {} static void EmitUINT_2101010(A64Emitter& e, const EmitArgType& i) {}
static void EmitULONG_4202020(A64Emitter& e, const EmitArgType& i) {} static void EmitULONG_4202020(A64Emitter& e, const EmitArgType& i) {}
static void Emit8_IN_16(A64Emitter& e, const EmitArgType& i, uint32_t flags) { static void Emit8_IN_16(A64Emitter& e, const EmitArgType& i, uint32_t flags) {