[FFmpeg-devel] FFMpeg on SH4 (STi7109)
Wed Nov 19 08:12:01 CET 2008
On Wed, Nov 19, 2008 at 12:54:55AM +0000, M?ns Rullg?rd wrote:
> Could I ask you to run some simple benchmarks with and without the
> functions from qpel.c and dsputil_align.c? I have the feeling those
> optimisations are not all that optimal when all comes around. A
> comment in qpel.c talks about *p++ vs. p[n] to access arrays, and most
> functions in this file seem to be the plain C functions rewritten to
> use *p++ access. There is, however, very little difference in the
> generated code.
I have the feeling that might be because some (probably all) sh4
compilers really suck(ed) very much.
IIRC the last time SH4 came up here was because some compiler
miscompiled half of FFmpeg...
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