[FFmpeg-cvslog] libavutil: camellia: remove unwanted memory loads

Supraja Meedinti git at videolan.org
Tue Feb 10 17:34:13 CET 2015


ffmpeg | branch: master | Supraja Meedinti <supraja0493 at gmail.com> | Tue Feb 10 21:42:07 2015 +0530| [8d5a8501195283e6f09f0d0b929cf2e893194df7] | committer: Michael Niedermayer

libavutil: camellia: remove unwanted memory loads

lavu       CAMELLIA     size: 1048576  runs:   1024  time:   21.549 +- 0.17

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8d5a8501195283e6f09f0d0b929cf2e893194df7
---

 libavutil/camellia.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/libavutil/camellia.c b/libavutil/camellia.c
index 62ee96b..483eed2 100644
--- a/libavutil/camellia.c
+++ b/libavutil/camellia.c
@@ -142,11 +142,9 @@ static void LR128(uint64_t d[2], const uint64_t K[2], int x)
 
 static uint64_t F(uint64_t F_IN, uint64_t KE)
 {
-    uint8_t y[8];
     KE ^= F_IN;
-    AV_WB64(y,KE);
-    KE=SP[0][y[0]] ^ SP[1][y[1]] ^ SP[2][y[2]] ^ SP[3][y[3]] ^ SP[4][y[4]] ^ SP[5][y[5]] ^ SP[6][y[6]] ^ SP[7][y[7]];
-    return KE;
+    F_IN=SP[0][KE >> 56]^SP[1][(KE >> 48) & MASK8]^SP[2][(KE >> 40) & MASK8]^SP[3][(KE >> 32) & MASK8]^SP[4][(KE >> 24) & MASK8]^SP[5][(KE >> 16) & MASK8]^SP[6][(KE >> 8) & MASK8]^SP[7][KE & MASK8];
+    return F_IN;
 }
 
 static uint64_t FL(uint64_t FL_IN, uint64_t KE)



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