3 ms·
In that case it's all of them. Some might like having both a MOV and a XOR in some special cases (one to avoid partial register stalls and one to avoid partial
by bonzini 6y ago
In that case it's all of them. Some might like having both a MOV and a XOR in some special cases (one to avoid partial register stalls and one to avoid partial flags stalls, if I remember correctly) but even in those cases it's usually easy enough to avoid partial register stalls in some other way and just use XOR.