[FFmpeg-devel] [PATCH] fix for roundup issue 2127

Ronald S. Bultje rsbultje
Thu Dec 30 19:35:02 CET 2010


On Thu, Dec 30, 2010 at 1:33 PM, Reimar D?ffinger
<Reimar.Doeffinger at gmx.de> wrote:
> On 30 dec 2010, at 19:14, Daniel Kang <daniel.d.kang at gmail.com> wrote:
>> I am a Google Code-In student, and as part of a task, I have written a
>> fix for: https://roundup.ffmpeg.org/issue2127. The patch compiles with
>> 32/64-bit and --disable-optimizations. It passes "make fate" with and
>> without --disable-optimizations.
>> I have ran several timings with and without my patch. The
>> START/STOP_TIMER was placed around the actual "asm" block in the
>> transpose4x4 function.
>> With my patch: 21.32 +/- 0.04 clocks
>> Without my patch: 21.58 +/- 0.04 clocks
>> Are there any comments on my patch? If not, can this be committed?
> There must be something wrong, the #else code will never be compiled.
> Also, the new code seems to require 6 registers, IIRC PIC + frame-pointer only leaves available 5.

Don't we compile with -fomit-frame-pointer?


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