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thumb32: Implement SUB (immediate, T3)

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This commit is contained in:
MerryMage 2021-02-28 21:45:27 +00:00
parent 8efb2a5b05
commit 8d33de2dcc
3 changed files with 21 additions and 1 deletions
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2
src/frontend/A32/decoder/thumb32.inc
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@ -67,7 +67,7 @@ INST(thumb32_ADD_imm_1, "ADD (imm)", "11110v01000Snnnn0vvvdd
INST(thumb32_ADC_imm, "ADC (imm)", "11110v01010Snnnn0vvvddddvvvvvvvv") INST(thumb32_ADC_imm, "ADC (imm)", "11110v01010Snnnn0vvvddddvvvvvvvv")
INST(thumb32_SBC_imm, "SBC (imm)", "11110v01011Snnnn0vvvddddvvvvvvvv") INST(thumb32_SBC_imm, "SBC (imm)", "11110v01011Snnnn0vvvddddvvvvvvvv")
INST(thumb32_CMP_imm, "CMP (imm)", "11110v011011nnnn0vvv1111vvvvvvvv") INST(thumb32_CMP_imm, "CMP (imm)", "11110v011011nnnn0vvv1111vvvvvvvv")
//INST(thumb32_SUB_imm_1, "SUB (imm)", "11110-01101-----0---------------") INST(thumb32_SUB_imm_1, "SUB (imm)", "11110v01101Snnnn0vvvddddvvvvvvvv")
//INST(thumb32_RSB_imm, "RSB (imm)", "11110-01110-----0---------------") //INST(thumb32_RSB_imm, "RSB (imm)", "11110-01110-----0---------------")
// Data Processing (Plain Binary Immediate) // Data Processing (Plain Binary Immediate)

19
src/frontend/A32/translate/impl/thumb32_data_processing_modified_immediate.cpp
View file

@ -243,4 +243,23 @@ bool ThumbTranslatorVisitor::thumb32_CMP_imm(Imm<1> i, Reg n, Imm<3> imm3, Imm<8
return true; return true;
} }
bool ThumbTranslatorVisitor::thumb32_SUB_imm_1(Imm<1> i, bool S, Reg n, Imm<3> imm3, Reg d, Imm<8> imm8) {
ASSERT_MSG(!(d == Reg::PC && S), "Decode error");
if ((d == Reg::PC && !S) || 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.SetRegister(d, result.result);
if (S) {
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 } // namespace Dynarmic::A32

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

@ -163,6 +163,7 @@ struct ThumbTranslatorVisitor final {
bool thumb32_ADC_imm(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_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); bool thumb32_CMP_imm(Imm<1> i, Reg n, Imm<3> imm3, Imm<8> imm8);
bool thumb32_SUB_imm_1(Imm<1> i, bool S, Reg n, Imm<3> imm3, Reg d, Imm<8> imm8);
// thumb32 data processing (plain binary immediate) instructions. // thumb32 data processing (plain binary immediate) instructions.
bool thumb32_MOVT(Imm<1> imm1, Imm<4> imm4, Imm<3> imm3, Reg d, Imm<8> imm8); bool thumb32_MOVT(Imm<1> imm1, Imm<4> imm4, Imm<3> imm3, Reg d, Imm<8> imm8);