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From: Rugxulo <rugxulo AT gmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: I need strtok_r() function
Date: Tue, 18 Oct 2011 10:42:57 -0700 (PDT)
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Reply-To: djgpp AT delorie DOT com

Hi,

On Oct 18, 10:11 am, Andris Pavenis <andris DOT pave DOT  DOT  DOT  AT iki DOT fi> wrote:
> On 10/18/2011 05:04 PM, Eli Zaretskii wrote:
>
> >> From: RayeR<gl DOT  DOT  DOT  AT centrum DOT cz>
> >> Newsgroups: comp.os.msdos.djgpp
> >> Date: Tue, 18 Oct 2011 06:05:56 -0700 (PDT)
>
> >> Unfortunately when I tested compiled x264 to compress sample video it
> >> crashes immediatelly:

(to quote RayeR later on from BTTR Forum):

"I had to disable HAVE_MMX in config.h that also turned off dynamic
CPU
detection and it's working now. It works regardless C opt. flags.
There are
also some ASM files compiled by YASM..."

> >> C:\X264>X264.EXE -o out.flv example.y4m
> >> y4m [info]: 384x288p 0:0 @ 25/1 fps (cfr)
> >> x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle
> >> SSE4.2
>
> > I don't think DJGPP supports these capabilities, but I may be wrong.
>
> I think that GCC generates according instructions when appropriate
> value of -march parameter is being used. I'm not sure about all of them
> though

I'm not sure (and am far far from an expert). -ftree-vectorize is
turned on with -O3 in newer GCC versions, I thought, but it usually
doesn't do much (from what I could tell in limited testing). You can
use the -ftree-vectorizer-verbose=5 (or whatever) to see if it works
at all.

Here's a website with some details (not totally current but close
enough):

http://gcc.gnu.org/projects/tree-ssa/vectorization.html