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A64: Implement CCMP (register)

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Lioncash 2018-02-04 19:09:20 -05:00 committed by MerryMage
parent 22632db337
commit a6c6539109
2 changed files with 14 additions and 1 deletions
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2
src/frontend/A64/decoder/a64.inc
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@ -300,7 +300,7 @@ INST(SBCS, "SBCS", "z1111
// Data Processing - Register - Conditional compare
INST(CCMN_reg, "CCMN (register)", "z0111010010mmmmmcccc00nnnnn0ffff")
//INST(CCMP_reg, "CCMP (register)", "z1111010010mmmmmcccc00nnnnn0ffff")
INST(CCMP_reg, "CCMP (register)", "z1111010010mmmmmcccc00nnnnn0ffff")
//INST(CCMN_imm, "CCMN (immediate)", "z0111010010iiiiicccc10nnnnn0ffff")
//INST(CCMP_imm, "CCMP (immediate)", "z1111010010iiiiicccc10nnnnn0ffff")

13
src/frontend/A64/translate/impl/data_processing_conditional_compare.cpp
View file

@ -21,4 +21,17 @@ bool TranslatorVisitor::CCMN_reg(bool sf, Reg Rm, Cond cond, Reg Rn, Imm<4> nzcv
return true;
}
bool TranslatorVisitor::CCMP_reg(bool sf, Reg Rm, Cond cond, Reg Rn, Imm<4> nzcv) {
const size_t datasize = sf ? 64 : 32;
const u32 flags = nzcv.ZeroExtend<u32>() << 28;
const IR::U32U64 operand1 = X(datasize, Rn);
const IR::U32U64 operand2 = X(datasize, Rm);
const IR::NZCV then_flags = ir.NZCVFrom(ir.AddWithCarry(operand1, ir.Not(operand2), ir.Imm1(1)));
const IR::NZCV else_flags = ir.NZCVFromPackedFlags(ir.Imm32(flags));
ir.SetNZCV(ir.ConditionalSelect(cond, then_flags, else_flags));
return true;
}
} // namespace Dynarmic::A64