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A64: Implement SQSHLU's vector variant

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The vector shift by immediate category is now fully implemented.
This commit is contained in:
Lioncash 2019-04-12 19:44:49 -04:00 committed by MerryMage
parent a4cadf1cd9
commit 2d59d10ac8
2 changed files with 20 additions and 6 deletions
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2
src/frontend/A64/decoder/a64.inc
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@ -855,7 +855,7 @@ INST(URSHR_2, "URSHR", "0Q101
INST(URSRA_2, "URSRA", "0Q1011110IIIIiii001101nnnnnddddd")
INST(SRI_2, "SRI", "0Q1011110IIIIiii010001nnnnnddddd")
INST(SLI_2, "SLI", "0Q1011110IIIIiii010101nnnnnddddd")
//INST(SQSHLU_2, "SQSHLU", "0Q1011110IIIIiii011001nnnnnddddd")
INST(SQSHLU_2, "SQSHLU", "0Q1011110IIIIiii011001nnnnnddddd")
INST(UQSHL_imm_2, "UQSHL (immediate)", "0Q1011110IIIIiii011101nnnnnddddd")
INST(SQSHRUN_2, "SQSHRUN, SQSHRUN2", "0Q1011110IIIIiii100001nnnnnddddd")
INST(SQRSHRUN_2, "SQRSHRUN, SQRSHRUN2", "0Q1011110IIIIiii100011nnnnnddddd")

24
src/frontend/A64/translate/impl/simd_shift_by_immediate.cpp
View file

@ -31,6 +31,12 @@ enum class Narrowing {
SaturateToSigned,
};
enum class SaturatingShiftLeftType {
Signed,
Unsigned,
SignedWithUnsignedSaturation,
};
enum class FloatConversionDirection {
FixedToFloat,
FloatToFixed,
@ -160,7 +166,7 @@ bool ShiftLeftLong(TranslatorVisitor& v, bool Q, Imm<4> immh, Imm<3> immb, Vec V
return true;
}
bool SaturatingShiftLeft(TranslatorVisitor& v, bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd, Signedness sign) {
bool SaturatingShiftLeft(TranslatorVisitor& v, bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd, SaturatingShiftLeftType type) {
if (!Q && immh.Bit<3>()) {
return v.ReservedValue();
}
@ -172,11 +178,15 @@ bool SaturatingShiftLeft(TranslatorVisitor& v, bool Q, Imm<4> immh, Imm<3> immb,
const IR::U128 operand = v.V(datasize, Vn);
const IR::U128 shift_vec = v.ir.VectorBroadcast(esize, v.I(esize, shift));
const IR::U128 result = [&] {
if (sign == Signedness::Signed) {
if (type == SaturatingShiftLeftType::Signed) {
return v.ir.VectorSignedSaturatedShiftLeft(esize, operand, shift_vec);
}
return v.ir.VectorUnsignedSaturatedShiftLeft(esize, operand, shift_vec);
if (type == SaturatingShiftLeftType::Unsigned) {
return v.ir.VectorUnsignedSaturatedShiftLeft(esize, operand, shift_vec);
}
return v.ir.VectorSignedSaturatedShiftLeftUnsigned(esize, operand, shift_vec);
}();
v.V(datasize, Vd, result);
@ -267,7 +277,11 @@ bool TranslatorVisitor::RSHRN(bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd)
}
bool TranslatorVisitor::SQSHL_imm_2(bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {
return SaturatingShiftLeft(*this, Q, immh, immb, Vn, Vd, Signedness::Signed);
return SaturatingShiftLeft(*this, Q, immh, immb, Vn, Vd, SaturatingShiftLeftType::Signed);
}
bool TranslatorVisitor::SQSHLU_2(bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {
return SaturatingShiftLeft(*this, Q, immh, immb, Vn, Vd, SaturatingShiftLeftType::SignedWithUnsignedSaturation);
}
bool TranslatorVisitor::SQSHRN_2(bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {
@ -287,7 +301,7 @@ bool TranslatorVisitor::SQRSHRUN_2(bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec
}
bool TranslatorVisitor::UQSHL_imm_2(bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {
return SaturatingShiftLeft(*this, Q, immh, immb, Vn, Vd, Signedness::Unsigned);
return SaturatingShiftLeft(*this, Q, immh, immb, Vn, Vd, SaturatingShiftLeftType::Unsigned);
}
bool TranslatorVisitor::UQSHRN_2(bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {