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| author | Reimar Döffinger <Reimar.Doeffinger@gmx.de> | 2010-07-02 17:33:45 +0000 |
|---|---|---|
| committer | Reimar Döffinger <Reimar.Doeffinger@gmx.de> | 2010-07-02 17:33:45 +0000 |
| commit | 19c039ee3db6ab8b60957cefaef05792ef314786 (patch) | |
| tree | c609b147d60de1a191dea549904982d74f5ce5d4 /libavutil/aes.c | |
| parent | 961b0c41b95268e8f5bf4e75a795043f20567ff1 (diff) | |
Make mix function more readable.
Compiler output unchanged with gcc 4.4.
Originally committed as revision 24006 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavutil/aes.c')
| -rw-r--r-- | libavutil/aes.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/libavutil/aes.c b/libavutil/aes.c index 58654233d7..66cf926a14 100644 --- a/libavutil/aes.c +++ b/libavutil/aes.c @@ -78,10 +78,11 @@ static inline int mix_core(uint32_t multbl[][256], int a, int b, int c, int d){ } static inline void mix(av_aes_block state[2], uint32_t multbl[][256], int s1, int s3){ - state[0].u32[0] = mix_core(multbl, state[1].u8x4[0][0], state[1].u8x4[s1 ][1], state[1].u8x4[2][2], state[1].u8x4[s3 ][3]); - state[0].u32[1] = mix_core(multbl, state[1].u8x4[1][0], state[1].u8x4[s3-1][1], state[1].u8x4[3][2], state[1].u8x4[s1-1][3]); - state[0].u32[2] = mix_core(multbl, state[1].u8x4[2][0], state[1].u8x4[s3 ][1], state[1].u8x4[0][2], state[1].u8x4[s1 ][3]); - state[0].u32[3] = mix_core(multbl, state[1].u8x4[3][0], state[1].u8x4[s1-1][1], state[1].u8x4[1][2], state[1].u8x4[s3-1][3]); + uint8_t (*src)[4] = state[1].u8x4; + state[0].u32[0] = mix_core(multbl, src[0][0], src[s1 ][1], src[2][2], src[s3 ][3]); + state[0].u32[1] = mix_core(multbl, src[1][0], src[s3-1][1], src[3][2], src[s1-1][3]); + state[0].u32[2] = mix_core(multbl, src[2][0], src[s3 ][1], src[0][2], src[s1 ][3]); + state[0].u32[3] = mix_core(multbl, src[3][0], src[s1-1][1], src[1][2], src[s3-1][3]); } static inline void crypt(AVAES *a, int s, const uint8_t *sbox, uint32_t multbl[][256]){ |