[FFmpeg-devel] [PATCH 3/4] x86util: import MOVHL macro
jdarnley at obe.tv
Wed Feb 15 17:55:21 EET 2017
On 2017-02-14 17:21, Henrik Gramner wrote:
> On Mon, Feb 13, 2017 at 1:44 PM, James Darnley <jdarnley at obe.tv> wrote:
>> Originally committed to x264 in 1637239a by Henrik Gramner who has
>> agreed to re-license it as LGPL. Original commit message follows.
>> x86: Avoid some bypass delays and false dependencies
>> A bypass delay of 1-3 clock cycles may occur on some CPUs when transitioning
>> between int and float domains, so try to avoid that if possible.
> Not sure if I see the point in copying the original commit message in
> this case, but the patch itself is OK.
It provides a nice "why" for the patch/macro is useful.
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