On Mon, Feb 11, 2019 at 01:47:16PM +0100, Ingo Molnar wrote:
> * Alexey Dobriyan wrote:
> > QUESTION: is it possible to tell gcc "this function is semantically
> > equivalent to memset(3) so make high level optimizations but call it
> > when it is necessary"? I suspect the answer is "no" :-\
>
>
* Alexey Dobriyan wrote:
> Current memset() implementation does silly things:
> * multiplication to get wide constant:
> waste of cycles if filler is known at compile time,
>
> * REP STOSQ followed by REP STOSB:
> this code is used when REP STOSB is slow but still it is used
>
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