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thumb32: Implement PKHBT, PKHTB

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This commit is contained in:
MerryMage 2021-03-06 19:33:41 +00:00
parent d2d996e6ba
commit e7ecd3a7ee
3 changed files with 17 additions and 1 deletions
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2
src/frontend/A32/decoder/thumb32.inc
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@ -38,7 +38,7 @@ INST(thumb32_MVN_reg, "MVN (reg)", "11101010011S11110vvvdd
INST(thumb32_ORN_reg, "ORN (reg)", "11101010011Snnnn0vvvddddvvttmmmm")
INST(thumb32_TEQ_reg, "TEQ (reg)", "111010101001nnnn0vvv1111vvttmmmm")
INST(thumb32_EOR_reg, "EOR (reg)", "11101010100Snnnn0vvvddddvvttmmmm")
//INST(thumb32_PKH, "PKH", "11101010110---------------------")
INST(thumb32_PKH, "PKH", "111010101100nnnn0vvvddddvvt0mmmm")
//INST(thumb32_CMN_reg, "CMN (reg)", "111010110001--------1111--------")
//INST(thumb32_ADD_reg, "ADD (reg)", "11101011000---------------------")
//INST(thumb32_ADC_reg, "ADC (reg)", "11101011010---------------------")

15
src/frontend/A32/translate/impl/thumb32_data_processing_shifted_register.cpp
View file

@ -155,4 +155,19 @@ bool ThumbTranslatorVisitor::thumb32_EOR_reg(bool S, Reg n, Imm<3> imm3, Reg d,
return true;
}
bool ThumbTranslatorVisitor::thumb32_PKH(Reg n, Imm<3> imm3, Reg d, Imm<2> imm2, Imm<1> tb, Reg m) {
const ShiftType type = concatenate(tb, Imm<1>{0}).ZeroExtend<ShiftType>();
if (d == Reg::PC || n == Reg::PC || m == Reg::PC) {
return UnpredictableInstruction();
}
const auto operand2 = EmitImmShift(ir.GetRegister(m), type, imm3, imm2, ir.GetCFlag()).result;
const auto lower = ir.And((tb == 1) ? operand2 : ir.GetRegister(n), ir.Imm32(0x0000FFFF));
const auto upper = ir.And((tb == 1) ? ir.GetRegister(n) : operand2, ir.Imm32(0xFFFF0000));
const auto result = ir.Or(upper, lower);
ir.SetRegister(d, result);
return true;
}
} // namespace Dynarmic::A32

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

@ -181,6 +181,7 @@ struct ThumbTranslatorVisitor final {
bool thumb32_ORN_reg(bool S, Reg n, Imm<3> imm3, Reg d, Imm<2> imm2, ShiftType type, Reg m);
bool thumb32_TEQ_reg(Reg n, Imm<3> imm3, Imm<2> imm2, ShiftType type, Reg m);
bool thumb32_EOR_reg(bool S, Reg n, Imm<3> imm3, Reg d, Imm<2> imm2, ShiftType type, Reg m);
bool thumb32_PKH(Reg n, Imm<3> imm3, Reg d, Imm<2> imm2, Imm<1> tb, Reg m);
// thumb32 data processing (modified immediate) instructions
bool thumb32_TST_imm(Imm<1> i, Reg n, Imm<3> imm3, Imm<8> imm8);