On Mon, Aug 30, 2021 at 04:16:43PM -0500, Paul A. Clarke wrote: > The confusing thing is that _builtin_mffsl is explicitly supported on earlier > processors, if I read the code right (from gcc/config/rs6000/rs6000.md):
Yes. It is very simple to implement everywhere, not significantly slower than mffs. So allowing this builtin to be used everywhere makes it easier to use, with no real downsides. Segher
