Method FCOMI

source/emulation/cpu/common/fpu.cpp:568–607

}

void FPU::FCOMI(CPU* cpu, int st, int other) {
    U32 stTag = GetTag(cpu, st);
    U32 otherTag = GetTag(cpu, other);

    // don't want to convert to cache just for inspection
    if (isRegCached[other] && isRegCached[st]) {
        if (stTag == TAG_Empty || otherTag == TAG_Empty || isnan(this->regCache[st].d) || isnan(this->regCache[other].d)) {
            setFlags(cpu, ZF | PF | CF);
            return;
        }
        if (this->regCache[st].d == this->regCache[other].d) {
            setFlags(cpu, ZF);
            return;
        }
        if (this->regCache[st].d < this->regCache[other].d) {
            setFlags(cpu, CF);
            return;
        }
        // st > other
        setFlags(cpu, 0);
    } else {
        extFloat80_t f1 = getReg(st);
        extFloat80_t f2 = getReg(other);

        if (stTag == TAG_Empty || otherTag == TAG_Empty || F80_isnan(f1) || F80_isnan(f2)) {
            setFlags(cpu, ZF | PF | CF);
            return;
        }
        if (extF80_eq(f1, f2)) {
            setFlags(cpu, ZF);
            return;
        }
        if (extF80_lt(f1, f2)) {
            setFlags(cpu, CF);
            return;
        }
        // st > other
        setFlags(cpu, 0);
    }
}

void FPU::FCOM(CPU* cpu, int st, int other) {
    U32 stTag = GetTag(cpu, st);