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A64: Implement SLI (vector)

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Lioncash 2018-04-07 23:31:19 -04:00 • committed by MerryMage
parent e3d9bf55e7
commit 11005cfe26
2 changed files with 27 additions and 1 deletions
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26
src/frontend/A64/translate/impl/simd_shift_by_immediate.cpp
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@ -304,4 +304,30 @@ bool TranslatorVisitor::USHLL(bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd)
return true;
}
bool TranslatorVisitor::SLI_2(bool Q, Imm<4> immh, Imm<3> immb, Vec Vn, Vec Vd) {
if (immh == 0b0000) {
return DecodeError();
}
if (!Q && immh.Bit<3>()) {
return ReservedValue();
}
const size_t esize = 8 << Common::HighestSetBit(immh.ZeroExtend());
const size_t datasize = Q ? 128 : 64;
const u8 shift_amount = concatenate(immh, immb).ZeroExtend<u8>() - static_cast<u8>(esize);
const u64 mask = Common::Ones<u64>(esize) << shift_amount;
const IR::U128 operand1 = V(datasize, Vn);
const IR::U128 operand2 = V(datasize, Vd);
const IR::U128 shifted = ir.VectorLogicalShiftLeft(esize, operand1, shift_amount);
const IR::U128 mask_vec = ir.VectorBroadcast(esize, I(esize, mask));
const IR::U128 result = ir.VectorOr(ir.VectorAnd(operand2, ir.VectorNot(mask_vec)), shifted);
V(datasize, Vd, result);
return true;
}
} // namespace Dynarmic::A64