[FFmpeg-trac] #5568(swscale:open): POWER8 VSX vectorization libswscale/swscale.c

FFmpeg trac at avcodec.org
Fri Jun 22 15:24:58 EEST 2018

#5568: POWER8 VSX vectorization libswscale/swscale.c
             Reporter:  edelsohn     |                    Owner:
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  swscale
              Version:  git-master   |               Resolution:
             Keywords:  bounty vsx   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by cehoyos):

 Replying to [comment:19 bookmoons]:

 > Then building with --enable-linux-perf. It fails with:
 > >error: implicit declaration of function 'syscall'
 This is a particular difficult feature to use;-)
 You have to add `#include "libavutil/timer.h"` (or `#define _GNU_SOURCE`)
 on top of the file where you use the TIMER macro, this was mentioned in
 the original commit message: f61379cbd45a91b26c7a1ddd3f16417466c435cd
 (Took me some time to understand.)

Ticket URL: <https://trac.ffmpeg.org/ticket/5568#comment:27>
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