[FFmpeg-cvslog] avcodec/x86/vp9lpf: add a comment above a bunch of SWAP.

[Clément Bœsch]

ffmpeg | branch: master | Clément Bœsch <u at pkh.me> | Sun Apr 20 21:33:58 2014 +0200| [62d31307c1c50af26eaba4896c23b66d8034c56d] | committer: Clément Bœsch

avcodec/x86/vp9lpf: add a comment above a bunch of SWAP.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=62d31307c1c50af26eaba4896c23b66d8034c56d
---

 libavcodec/x86/vp9lpf.asm |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/x86/vp9lpf.asm b/libavcodec/x86/vp9lpf.asm
index 1e9c7bb..c5db0ca 100644
--- a/libavcodec/x86/vp9lpf.asm
+++ b/libavcodec/x86/vp9lpf.asm
@@ -419,6 +419,8 @@ SECTION .text
     mova               m14, [Q2]
     mova               m15, [Q3]
 %else
+    ; In case of horizontal, P3..Q3 are already present in some registers due
+    ; to the previous transpose, so we just swap registers.
     SWAP                 8,  4, 12
     SWAP                 9,  5, 13
     SWAP                10,  6, 14