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thumb32: Implement UXTH

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This commit is contained in:
Lioncash 2021-02-10 16:07:17 -05:00
parent c0871d4c18
commit e12ee8d4d7
3 changed files with 14 additions and 1 deletions
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2
src/frontend/A32/decoder/thumb32.inc
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@ -197,7 +197,7 @@
//INST(thumb32_ROR_reg, "ROR (reg)", "11111010011-----1111----0000----") //INST(thumb32_ROR_reg, "ROR (reg)", "11111010011-----1111----0000----")
INST(thumb32_SXTH, "SXTH", "11111010000011111111dddd10rrmmmm") INST(thumb32_SXTH, "SXTH", "11111010000011111111dddd10rrmmmm")
INST(thumb32_SXTAH, "SXTAH", "111110100000nnnn1111dddd10rrmmmm") INST(thumb32_SXTAH, "SXTAH", "111110100000nnnn1111dddd10rrmmmm")
//INST(thumb32_UXTH, "UXTH", "11111010000111111111----1-------") INST(thumb32_UXTH, "UXTH", "11111010000111111111dddd10rrmmmm")
//INST(thumb32_UXTAH, "UXTAH", "111110100001----1111----1-------") //INST(thumb32_UXTAH, "UXTAH", "111110100001----1111----1-------")
//INST(thumb32_SXTB16, "SXTB16", "11111010001011111111----1-------") //INST(thumb32_SXTB16, "SXTB16", "11111010001011111111----1-------")
//INST(thumb32_SXTAB16, "SXTAB16", "111110100010----1111----1-------") //INST(thumb32_SXTAB16, "SXTAB16", "111110100010----1111----1-------")

12
src/frontend/A32/translate/impl/thumb32_data_processing_register.cpp
View file

@ -36,4 +36,16 @@ bool ThumbTranslatorVisitor::thumb32_SXTAH(Reg n, Reg d, SignExtendRotation rota
return true; return true;
} }
bool ThumbTranslatorVisitor::thumb32_UXTH(Reg d, SignExtendRotation rotate, Reg m) {
if (d == Reg::PC || m == Reg::PC) {
return UnpredictableInstruction();
}
const auto rotated = Rotate(ir, m, rotate);
const auto result = ir.ZeroExtendHalfToWord(ir.LeastSignificantHalf(rotated));
ir.SetRegister(d, result);
return true;
}
} // namespace Dynarmic::A32 } // namespace Dynarmic::A32

1
src/frontend/A32/translate/impl/translate_thumb.h
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@ -124,6 +124,7 @@ struct ThumbTranslatorVisitor final {
// thumb32 data processing (register) instructions // thumb32 data processing (register) instructions
bool thumb32_SXTH(Reg d, SignExtendRotation rotate, Reg m); bool thumb32_SXTH(Reg d, SignExtendRotation rotate, Reg m);
bool thumb32_SXTAH(Reg n, Reg d, SignExtendRotation rotate, Reg m); bool thumb32_SXTAH(Reg n, Reg d, SignExtendRotation rotate, Reg m);
bool thumb32_UXTH(Reg d, SignExtendRotation rotate, Reg m);
// thumb32 long multiply, long multiply accumulate, and divide instructions // thumb32 long multiply, long multiply accumulate, and divide instructions
bool thumb32_SDIV(Reg n, Reg d, Reg m); bool thumb32_SDIV(Reg n, Reg d, Reg m);