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thumb32: Implement UXTAB

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This commit is contained in:
Lioncash 2021-02-10 16:23:54 -05:00
parent d97369c252
commit e0d6b60270
3 changed files with 15 additions and 1 deletions
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2
src/frontend/A32/decoder/thumb32.inc
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@ -206,7 +206,7 @@ INST(thumb32_UXTAB16, "UXTAB16", "111110100011nnnn1111dd
INST(thumb32_SXTB, "SXTB", "11111010010011111111dddd10rrmmmm")
INST(thumb32_SXTAB, "SXTAB", "111110100100nnnn1111dddd10rrmmmm")
INST(thumb32_UXTB, "UXTB", "11111010010111111111dddd10rrmmmm")
//INST(thumb32_UXTAB, "UXTAB", "111110100101----1111----1-------")
INST(thumb32_UXTAB, "UXTAB", "111110100101nnnn1111dddd10rrmmmm")
// Parallel Addition and Subtraction (signed)
INST(thumb32_SADD16, "SADD16", "111110101001nnnn1111dddd0000mmmm")

13
src/frontend/A32/translate/impl/thumb32_data_processing_register.cpp
View file

@ -114,6 +114,19 @@ bool ThumbTranslatorVisitor::thumb32_UXTB16(Reg d, SignExtendRotation rotate, Re
return true;
}
bool ThumbTranslatorVisitor::thumb32_UXTAB(Reg n, Reg d, SignExtendRotation rotate, Reg m) {
if (d == Reg::PC || m == Reg::PC) {
return UnpredictableInstruction();
}
const auto rotated = Rotate(ir, m, rotate);
const auto reg_n = ir.GetRegister(n);
const auto result = ir.Add(reg_n, ir.ZeroExtendByteToWord(ir.LeastSignificantByte(rotated)));
ir.SetRegister(d, result);
return true;
}
bool ThumbTranslatorVisitor::thumb32_UXTAB16(Reg n, Reg d, SignExtendRotation rotate, Reg m) {
if (d == Reg::PC || m == Reg::PC) {
return UnpredictableInstruction();

1
src/frontend/A32/translate/impl/translate_thumb.h
View file

@ -130,6 +130,7 @@ struct ThumbTranslatorVisitor final {
bool thumb32_SXTAH(Reg n, Reg d, SignExtendRotation rotate, Reg m);
bool thumb32_UXTB(Reg d, SignExtendRotation rotate, Reg m);
bool thumb32_UXTB16(Reg d, SignExtendRotation rotate, Reg m);
bool thumb32_UXTAB(Reg n, Reg d, SignExtendRotation rotate, Reg m);
bool thumb32_UXTAB16(Reg n, Reg d, SignExtendRotation rotate, Reg m);
bool thumb32_UXTH(Reg d, SignExtendRotation rotate, Reg m);
bool thumb32_UXTAH(Reg n, Reg d, SignExtendRotation rotate, Reg m);