On Tue, 2016-03-29 at 10:27 +0800, Zeng Zhaoxiu wrote: > 在 2016年03月28日 14:51, Sam Ravnborg 写道: [] > > Defining these as static inlines in asm-generic prevent an > > architecture > > from selecting between a more optimal asm version or the generic version > > at run-time. > > sparc would benefit from this as only some sparc chips supports popc. > > See how this is done for hweight* > > > > Sam > Thanks. I will try.
You might also try to describe in any commit message and perhaps the internal documentation why using gcc's __builtin_parity isn't appropriate.
