Messages in this thread | | | Date | Fri, 7 Aug 2009 10:42:51 +0300 | From | Sergey Senozhatsky <> | Subject | Re: [PATCH] Make shr to divide by power of 2 |
| |
On (08/07/09 08:50), Andi Kleen wrote: > Sergey Senozhatsky <sergey.senozhatsky@gmail.com> writes: > > > > Of course, compiler supposed to do something like > > add $0x7,%eax > > shr $0x3,%eax > > instead of div. Should we rely on this? > > Yes. We should rely on this. >
grep -cR '>> 3' bitblit.c 5
and only 1 '/8'.
Sergey [unhandled content-type:application/pgp-signature] | |