DOS ain't dead - CMOVNTQ and multiple file access

CMOVNTQ and multiple file access (Developers)

posted by DOS386, 16.06.2012, 12:53

> I tried objdump *.a -d |grep cmov in my DJGPP\LIB and found that some
> system libs (like libm.a) are also poluted with CMOV, damn!

> In case of X264 the CMOVs also come from assembler modules that
> cannot be disabled

Then wonder why FFMPEG or MPLAYER persistently crash on CMOVNTQ despite reportedly compiled for 486 :-(

http://sf.net/tracker/?func=detail&aid=3000835&group_id=205275&atid=992986
http://sf.net/tracker/?func=detail&aid=3358347&group_id=205275&atid=992986

http://www.freebasic.net/forum/viewtopic.php?t=11066

> BTW just see new GCC 4.7.0 is here http://ap1.pp.fi/djgpp/gcc/4.7.0/

There is a possible new BUG (multiple file access):

http://sf.net/tracker/?func=detail&aid=3530451&group_id=5109&atid=105109

Anyone tested recent DGJPP in DOS ?

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Complete thread:

DJGPP/GCC 4.6.2 invalid code generation when -march restrict - RayeR, 10.04.2012, 00:38
- GCC 4.6.x invalid code generation - Rugxulo, 10.04.2012, 02:01
  - GCC 4.6.x invalid code generation - RayeR, 10.04.2012, 03:58
    - GCC 4.6.x invalid code generation - Rugxulo, 10.04.2012, 05:58
      - GCC 4.6.x invalid code generation - RayeR, 10.04.2012, 13:44
        GCC 4.6.x invalid code generation - marcov, 10.04.2012, 16:19
        GCC 4.6.x invalid code generation - RayeR, 10.04.2012, 17:44
        GCC 4.6.x invalid code generation - RayeR, 14.04.2012, 23:28
        GCC 4.6.x invalid code generation: MP [PATCH] configure cmov - Arjay, 15.04.2012, 09:05
        GCC 4.6.x invalid code generation: MP [PATCH] configure cmov - RayeR, 15.04.2012, 14:44
        GCC 4.6.x invalid code generation: MP [PATCH] configure cmov - RayeR, 26.04.2012, 01:50
        GCC 4.6.x invalid code generation - Rugxulo, 26.04.2012, 09:06
        GCC 4.6.x invalid code generation - RayeR, 28.04.2012, 02:14
        x264 0.124 update - RayeR, 01.05.2012, 17:57
        CMOVNTQ and multiple file access - DOS386, 16.06.2012, 12:53
        Multiple file access, FreeDOS file locking support - ecm, 16.06.2012, 14:31
        multiple file access / IUP 0.67 - Rugxulo, 16.06.2012, 17:48
        multiple file access / IUP 0.67 - DOS386, 17.06.2012, 09:33
        CMOVNTQ and multiple file access - RayeR, 19.06.2012, 20:38
        CMOVNTQ and multiple file access - RayeR, 21.06.2012, 04:32
        load SHARE - ecm, 21.06.2012, 05:06
        load SHARE - RayeR, 21.06.2012, 12:40
        load SHARE - ecm, 21.06.2012, 12:47
        load SHARE - RayeR, 21.06.2012, 19:58
        load SHARE - RayeR, 21.06.2012, 23:31
        load SHARE - ecm, 22.06.2012, 14:03
  - GCC 4.6.x invalid code generation - marcov, 10.04.2012, 16:16
    - GCC 4.6.x invalid code generation - RayeR, 10.04.2012, 17:49