On Mon, Sep 5, 2016 at 9:54 PM, Michel Dänzer <mic...@daenzer.net> wrote: > On 06/09/16 07:46 AM, Marek Olšák wrote: >> From: Marek Olšák <marek.ol...@amd.com> > > Did you measure any significant performance boost with this change? > Otherwise, using (un)likely can be bad because it can defeat the CPU's > branch prediction, which tends to be pretty good these days.
Is there a way to affect the branch predictor on x86 with instruction encodings? I didn't think so. I was under the impression that all likely/unlikely did was to affect placement of the code, i.e. where the "if" code was placed. -ilia _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
