Suyu/dynarmic
1
0
Fork 0
mirror of https://git.suyu.dev/suyu/dynarmic.git synced 2026-01-11 08:58:10 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

ir: Add opcodes for unsigned saturating left shifts

Browse source
This commit is contained in:
Lioncash 2018-09-18 18:09:47 -04:00 • committed by MerryMage
parent ab60720418
commit d426dfe942
5 changed files with 76 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

52
src/backend/x64/emit_x64_vector.cpp
View file

@ -4100,6 +4100,58 @@ void EmitX64::EmitVectorUnsignedSaturatedNarrow64(EmitContext& ctx, IR::Inst* in
});
}
template <typename T, typename S = std::make_signed_t<T>>
static bool VectorUnsignedSaturatedShiftLeft(VectorArray<T>& dst, const VectorArray<T>& data, const VectorArray<T>& shift_values) {
static_assert(std::is_unsigned_v<T>, "T must be an unsigned type.");
bool qc_flag = false;
constexpr size_t bit_size = Common::BitSize<T>();
constexpr S negative_bit_size = -static_cast<S>(bit_size);
for (size_t i = 0; i < dst.size(); i++) {
const T element = data[i];
const S shift = std::clamp(static_cast<S>(Common::SignExtend<8>(shift_values[i] & 0xFF)),
negative_bit_size, std::numeric_limits<S>::max());
if (element == 0 || shift <= negative_bit_size) {
dst[i] = 0;
} else if (shift < 0) {
dst[i] = static_cast<T>(element >> -shift);
} else if (shift >= static_cast<S>(bit_size)) {
dst[i] = std::numeric_limits<T>::max();
qc_flag = true;
} else {
const T shifted = element << shift;
if ((shifted >> shift) != element) {
dst[i] = std::numeric_limits<T>::max();
qc_flag = true;
} else {
dst[i] = shifted;
}
}
}
return qc_flag;
}
void EmitX64::EmitVectorUnsignedSaturatedShiftLeft8(EmitContext& ctx, IR::Inst* inst) {
EmitTwoArgumentFallbackWithSaturation(code, ctx, inst, VectorUnsignedSaturatedShiftLeft<u8>);
}
void EmitX64::EmitVectorUnsignedSaturatedShiftLeft16(EmitContext& ctx, IR::Inst* inst) {
EmitTwoArgumentFallbackWithSaturation(code, ctx, inst, VectorUnsignedSaturatedShiftLeft<u16>);
}
void EmitX64::EmitVectorUnsignedSaturatedShiftLeft32(EmitContext& ctx, IR::Inst* inst) {
EmitTwoArgumentFallbackWithSaturation(code, ctx, inst, VectorUnsignedSaturatedShiftLeft<u32>);
}
void EmitX64::EmitVectorUnsignedSaturatedShiftLeft64(EmitContext& ctx, IR::Inst* inst) {
EmitTwoArgumentFallbackWithSaturation(code, ctx, inst, VectorUnsignedSaturatedShiftLeft<u64>);
}
void EmitX64::EmitVectorZeroExtend8(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm a = ctx.reg_alloc.UseScratchXmm(args[0]);