>>>>> Segher Boessenkool writes: >> I think the cost would be something like: >> + case POPCOUNT: >> + *total = COSTS_N_INSNS (3); >> + return false;
Segher> Is that the cost when using popcountb? It is a lot more
Segher> expensive when that instruction isn't available (like on
Segher> most current machines).
Yes, but do we even create POPCOUNT rtx if the insn isn't
supported? Wouldn't we expand or create libcall early?
David
