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A64: Implement SABA

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Lioncash 2018-05-08 16:42:59 -04:00 committed by MerryMage
parent f00789e6f7
commit 7c0250e9f8
2 changed files with 37 additions and 14 deletions
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2
src/frontend/A64/decoder/a64.inc
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@ -715,7 +715,7 @@ INST(SSHL_2, "SSHL", "0Q001
INST(SMAX, "SMAX", "0Q001110zz1mmmmm011001nnnnnddddd")
INST(SMIN, "SMIN", "0Q001110zz1mmmmm011011nnnnnddddd")
INST(SABD, "SABD", "0Q001110zz1mmmmm011101nnnnnddddd")
//INST(SABA, "SABA", "0Q001110zz1mmmmm011111nnnnnddddd")
INST(SABA, "SABA", "0Q001110zz1mmmmm011111nnnnnddddd")
INST(ADD_vector, "ADD (vector)", "0Q001110zz1mmmmm100001nnnnnddddd")
INST(CMTST_2, "CMTST", "0Q001110zz1mmmmm100011nnnnnddddd")
INST(MLA_vec, "MLA (vector)", "0Q001110zz1mmmmm100101nnnnnddddd")

49
src/frontend/A64/translate/impl/simd_three_same.cpp
View file

@ -44,6 +44,37 @@ static void HighNarrowingOperation(TranslatorVisitor& v, bool Q, Imm<2> size, Ve
v.Vpart(64, Vd, part, result);
}
enum class AbsDiffExtraBehavior {
None,
Accumulate
};
bool SignedAbsoluteDifference(TranslatorVisitor& v, bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd, AbsDiffExtraBehavior behavior) {
if (size == 0b11) {
return v.ReservedValue();
}
const size_t datasize = Q ? 128 : 64;
const size_t esize = 8 << size.ZeroExtend();
const IR::U128 operand1 = v.V(datasize, Vn);
const IR::U128 operand2 = v.V(datasize, Vm);
const IR::U128 result = [&] {
const IR::U128 tmp = v.ir.VectorSignedAbsoluteDifference(esize, operand1, operand2);
if (behavior == AbsDiffExtraBehavior::Accumulate) {
const IR::U128 d = v.V(datasize, Vd);
return v.ir.VectorAdd(esize, d, tmp);
}
return tmp;
}();
v.V(datasize, Vd, result);
return true;
}
} // Anonymous namespace
bool TranslatorVisitor::CMGT_reg_2(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd) {
@ -73,20 +104,12 @@ bool TranslatorVisitor::CMGE_reg_2(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd)
return true;
}
bool TranslatorVisitor::SABA(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd) {
return SignedAbsoluteDifference(*this, Q, size, Vm, Vn, Vd, AbsDiffExtraBehavior::Accumulate);
}
bool TranslatorVisitor::SABD(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd) {
if (size == 0b11) {
return ReservedValue();
}
const size_t datasize = Q ? 128 : 64;
const size_t esize = 8 << size.ZeroExtend();
const IR::U128 operand1 = V(datasize, Vn);
const IR::U128 operand2 = V(datasize, Vm);
const IR::U128 result = ir.VectorSignedAbsoluteDifference(esize, operand1, operand2);
V(datasize, Vd, result);
return true;
return SignedAbsoluteDifference(*this, Q, size, Vm, Vn, Vd, AbsDiffExtraBehavior::None);
}
bool TranslatorVisitor::SMAX(bool Q, Imm<2> size, Vec Vm, Vec Vn, Vec Vd) {