[FFmpeg-devel] [PATCH] IFF: Change decodeplane8 while to do ... while for getting 1% speedup

Sebastian Vater cdgs.basty
Sun May 9 23:55:14 CEST 2010

The patch from Mans which fixed the 8 pixels to less decoded per line
issue, causes crazy assembly code on gcc with x86_32.

So I changed this after discussing with Mans to make a do ... while loop

Please note that this patch has the side effect that a width <= 0 is
illegal, so this patch should only be applied after the width and height
check patch.

Benchmarking it resulted in a 1% speedup using MRLake.iff.

I tested this patch also against lms-matriks.ilbm which decodes still
fine. ;)


Best regards,
                   :-) Basty/CDGS (-:

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