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emit_x64_vector: Generify variable shift functions

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Lioncash 2018-04-20 12:09:32 -04:00 committed by MerryMage
parent 4ec735f707
commit 7b80ac25eb
1 changed files with 21 additions and 41 deletions
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62
src/backend_x64/emit_x64_vector.cpp
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@ -790,63 +790,43 @@ void EmitX64::EmitVectorLogicalShiftRight64(EmitContext& ctx, IR::Inst* inst) {
ctx.reg_alloc.DefineValue(inst, result);
}
template <typename T>
static constexpr T LogicalVShift(T x, T y) {
const s8 shift_amount = static_cast<s8>(static_cast<u8>(y));
const s64 bit_size = static_cast<s64>(Common::BitSize<T>());
if (shift_amount <= -bit_size || shift_amount >= bit_size) {
return 0;
}
if (shift_amount < 0) {
return x >> T(-shift_amount);
}
return x << T(shift_amount);
}
void EmitX64::EmitVectorLogicalVShift8(EmitContext& ctx, IR::Inst* inst) {
EmitTwoArgumentFallback(code, ctx, inst, [](std::array<u8, 16>& result, const std::array<u8, 16>& a, const std::array<u8, 16>& b){
std::transform(a.begin(), a.end(), b.begin(), result.begin(), [](u8 x, u8 y) -> u8 {
s8 shift_amount = static_cast<s8>(static_cast<u8>(y));
if (shift_amount <= -8 || shift_amount >= 8) {
return 0;
}
if (shift_amount < 0) {
return x >> u8(-shift_amount);
}
return x << u8(shift_amount);
});
EmitTwoArgumentFallback(code, ctx, inst, [](std::array<u8, 16>& result, const std::array<u8, 16>& a, const std::array<u8, 16>& b) {
std::transform(a.begin(), a.end(), b.begin(), result.begin(), LogicalVShift<u8>);
});
}
void EmitX64::EmitVectorLogicalVShift16(EmitContext& ctx, IR::Inst* inst) {
EmitTwoArgumentFallback(code, ctx, inst, [](std::array<u16, 8>& result, const std::array<u16, 8>& a, const std::array<u16, 8>& b){
std::transform(a.begin(), a.end(), b.begin(), result.begin(), [](u16 x, u16 y) -> u16 {
s8 shift_amount = static_cast<s8>(static_cast<u8>(y));
if (shift_amount <= -16 || shift_amount >= 16) {
return 0;
}
if (shift_amount < 0) {
return x >> u16(-shift_amount);
}
return x << u16(shift_amount);
});
std::transform(a.begin(), a.end(), b.begin(), result.begin(), LogicalVShift<u16>);
});
}
void EmitX64::EmitVectorLogicalVShift32(EmitContext& ctx, IR::Inst* inst) {
EmitTwoArgumentFallback(code, ctx, inst, [](std::array<u32, 4>& result, const std::array<u32, 4>& a, const std::array<u32, 4>& b){
std::transform(a.begin(), a.end(), b.begin(), result.begin(), [](u32 x, u32 y) -> u32 {
s8 shift_amount = static_cast<s8>(static_cast<u8>(y));
if (shift_amount <= -32 || shift_amount >= 32) {
return 0;
}
if (shift_amount < 0) {
return x >> u32(-shift_amount);
}
return x << u32(shift_amount);
});
std::transform(a.begin(), a.end(), b.begin(), result.begin(), LogicalVShift<u32>);
});
}
void EmitX64::EmitVectorLogicalVShift64(EmitContext& ctx, IR::Inst* inst) {
EmitTwoArgumentFallback(code, ctx, inst, [](std::array<u64, 2>& result, const std::array<u64, 2>& a, const std::array<u64, 2>& b){
std::transform(a.begin(), a.end(), b.begin(), result.begin(), [](u64 x, u64 y) -> u64 {
s8 shift_amount = static_cast<s8>(static_cast<u8>(y));
if (shift_amount <= -64 || shift_amount >= 64) {
return 0;
}
if (shift_amount < 0) {
return x >> u64(-shift_amount);
}
return x << u64(shift_amount);
});
std::transform(a.begin(), a.end(), b.begin(), result.begin(), LogicalVShift<u64>);
});
}