[FFmpeg-cvslog] avutil/sha512: Reshuffle Maj() operands
Michael Niedermayer
git at videolan.org
Sun Jun 2 13:24:01 CEST 2013
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Jun 2 13:18:16 2013 +0200| [09d6beee2496b6d8cd821e914522682cfd18a723] | committer: Michael Niedermayer
avutil/sha512: Reshuffle Maj() operands
This reduces dependancy chains and improves speed by about 2%
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=09d6beee2496b6d8cd821e914522682cfd18a723
---
libavutil/sha512.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavutil/sha512.c b/libavutil/sha512.c
index 7ed4ea5..445480c 100644
--- a/libavutil/sha512.c
+++ b/libavutil/sha512.c
@@ -91,7 +91,7 @@ static const uint64_t K512[80] = {
#define ror(value, bits) (((value) >> (bits)) | ((value) << (64 - (bits))))
#define Ch(x,y,z) (((x) & ((y) ^ (z))) ^ (z))
-#define Maj(x,y,z) ((((x) | (y)) & (z)) | ((x) & (y)))
+#define Maj(z,y,x) ((((x) | (y)) & (z)) | ((x) & (y)))
#define Sigma0_512(x) (ror((x), 28) ^ ror((x), 34) ^ ror((x), 39))
#define Sigma1_512(x) (ror((x), 14) ^ ror((x), 18) ^ ror((x), 41))
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