suyu/dynarmic
26
1
Fork 1
Code Issues Pull requests Projects Releases Packages Wiki Activity

thumb32: Implement CMP (immediate)

Browse source
This commit is contained in:
MerryMage 2021-02-28 21:43:45 +00:00
parent 78330e634f
commit 8efb2a5b05
3 changed files with 17 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/frontend/A32/decoder/thumb32.inc
View file

@ -66,7 +66,7 @@ INST(thumb32_CMN_imm, "CMN (imm)", "11110v010001nnnn0vvv11
INST(thumb32_ADD_imm_1, "ADD (imm)", "11110v01000Snnnn0vvvddddvvvvvvvv")
INST(thumb32_ADC_imm, "ADC (imm)", "11110v01010Snnnn0vvvddddvvvvvvvv")
INST(thumb32_SBC_imm, "SBC (imm)", "11110v01011Snnnn0vvvddddvvvvvvvv")
//INST(thumb32_CMP_imm, "CMP (imm)", "11110-011011----0---1111--------")
INST(thumb32_CMP_imm, "CMP (imm)", "11110v011011nnnn0vvv1111vvvvvvvv")
//INST(thumb32_SUB_imm_1, "SUB (imm)", "11110-01101-----0---------------")
//INST(thumb32_RSB_imm, "RSB (imm)", "11110-01110-----0---------------")

15
src/frontend/A32/translate/impl/thumb32_data_processing_modified_immediate.cpp
View file

@ -228,4 +228,19 @@ bool ThumbTranslatorVisitor::thumb32_SBC_imm(Imm<1> i, bool S, Reg n, Imm<3> imm
return true;
}
bool ThumbTranslatorVisitor::thumb32_CMP_imm(Imm<1> i, Reg n, Imm<3> imm3, Imm<8> imm8) {
if (n == Reg::PC) {
return UnpredictableInstruction();
}
const auto imm32 = ThumbExpandImm(i, imm3, imm8);
const auto result = ir.SubWithCarry(ir.GetRegister(n), ir.Imm32(imm32), ir.Imm1(1));
ir.SetNFlag(ir.MostSignificantBit(result.result));
ir.SetZFlag(ir.IsZero(result.result));
ir.SetCFlag(result.carry);
ir.SetVFlag(result.overflow);
return true;
}
} // namespace Dynarmic::A32

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

@ -162,6 +162,7 @@ struct ThumbTranslatorVisitor final {
bool thumb32_ADD_imm_1(Imm<1> i, bool S, Reg n, Imm<3> imm3, Reg d, Imm<8> imm8);
bool thumb32_ADC_imm(Imm<1> i, bool S, Reg n, Imm<3> imm3, Reg d, Imm<8> imm8);
bool thumb32_SBC_imm(Imm<1> i, bool S, Reg n, Imm<3> imm3, Reg d, Imm<8> imm8);
bool thumb32_CMP_imm(Imm<1> i, Reg n, Imm<3> imm3, Imm<8> imm8);
// thumb32 data processing (plain binary immediate) instructions.
bool thumb32_MOVT(Imm<1> imm1, Imm<4> imm4, Imm<3> imm3, Reg d, Imm<8> imm8);