Bug 136171

Summary:	ffmpeg-0.4.9_p20060530 fails with MMX-useflag
Product:	Gentoo/Alt	Reporter:	Simon Koenig <simon_koenig>
Component:	FreeBSD	Assignee:	Gentoo/BSD Team <bsd+disabled>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	Andreas.Klauer, crazy-ivanovic, jens, nanouck
Priority:	High
Version:	unspecified
Hardware:	All
OS:	FreeBSD
Whiteboard:
Package list:		Runtime testing required:	---

Description Simon Koenig 2006-06-09 04:32:56 UTC

Compiling ffmpeg with mmx useflag gives following error.
Disabling mmx useflag fixes this.

i686-gentoo-freebsd6.1-gcc -Wall -Wno-switch -march=athlon-xp -pipe -O2 -fomit-frame-pointer -fomit-frame-pointer -pthread -DHAVE_AV_CONFIG_H -I.. -I/var/tmp/portage/ffmpeg-0.4.9_p20060530/work/ffmpeg-0.4.9-p20060530-shared/libavutil -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE  -fPIC -DPIC -c -o i386/idct_mmx_xvid.o i386/idct_mmx_xvid.c
i386/snowdsp_mmx.c: In function `ff_snow_vertical_compose97i_sse2':
i386/snowdsp_mmx.c:461: error: PIC register `%ebx' clobbered in `asm'
i386/snowdsp_mmx.c: In function `ff_snow_vertical_compose97i_mmx':
i386/snowdsp_mmx.c:568: error: PIC register `%ebx' clobbered in `asm'
i386/snowdsp_mmx.c: In function `inner_add_yblock_bw_8_obmc_16_mmx':
i386/snowdsp_mmx.c:869: error: PIC register `%ebx' clobbered in `asm'
gmake[1]: *** [i386/snowdsp_mmx.o] Error 1
gmake[1]: Leaving directory `/var/tmp/portage/ffmpeg-0.4.9_p20060530/work/ffmpeg-0.4.9-p20060530-shared/libavcodec'
gmake: *** [lib] Error 2

Comment 1 Nanouck 2006-07-16 11:17:05 UTC

i get the same error with via-c3 and asm inline, it seems ebx cannot be dynamicaly assigned. This error appears in "shared" mode only. Moreover, I do not understand why sse2 functions are activated by mmx flag. 

In the other hand you can disable support for SNOW encoder with  --disable-encoder=snow but some errors remain.

Comment 2 Jens Pranaitis 2006-08-01 06:25:43 UTC

I get the same error to with Linux, this doesn't seem to be a BSD issue

Comment 3 Samuli Suominen (RETIRED) gentoo-dev

2006-08-01 07:27:18 UTC


*** This bug has been marked as a duplicate of 142380 ***