Re: [PATCH] x86: Add optimized popcnt variants

[H. Peter Anvin]

On 02/23/2010 07:58 AM, Borislav Petkov wrote:
> Hmm, we cannot do that with the current design since __arch_hweight64
> is being inlined into every callsite and AFAICT we would have to build
> every callsite with "-fcall-saved-rdi" which is clearly too much. The
> explicit "=D" dummy constraint is straightforward, instead.

Uh... the -fcall-saved-rdi would go with all the other ones.  Assuming 
it can actually work and that gcc doesn't choke on an inbound argument 
being saved.

	-hpa
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