diff options
| author | James Almer <jamrial@gmail.com> | 2013-09-10 03:16:40 +0400 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-09-11 23:55:59 +0400 |
| commit | bbcaf25d4d2130fa9c34c314628f9fd2f706b61b (patch) | |
| tree | 1ae1db6c3053abb62cba18bffae176dcf7f55d52 /libavutil/sha512.c | |
| parent | 7e4fe5162ab94a413e04caae19193c5e7a4c6478 (diff) | |
lavu/sha512: Fully unroll the transform function loops
crypto_bench SHA-512 results using an AMD Athlon X2 7750+, mingw32-w64 GCC 4.7.3 x86_64
Before:
lavu SHA-512 size: 1048576 runs: 1024 time: 12.737 +- 0.147
After:
lavu SHA-512 size: 1048576 runs: 1024 time: 11.670 +- 0.173
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavutil/sha512.c')
| -rw-r--r-- | libavutil/sha512.c | 45 |
1 files changed, 25 insertions, 20 deletions
diff --git a/libavutil/sha512.c b/libavutil/sha512.c index 84136037db..66a864f1a6 100644 --- a/libavutil/sha512.c +++ b/libavutil/sha512.c @@ -150,27 +150,32 @@ static void sha512_transform(uint64_t *state, const uint8_t buffer[128]) a = T1 + T2; } #else - for (i = 0; i < 16 - 7;) { - ROUND512_0_TO_15(a, b, c, d, e, f, g, h); - ROUND512_0_TO_15(h, a, b, c, d, e, f, g); - ROUND512_0_TO_15(g, h, a, b, c, d, e, f); - ROUND512_0_TO_15(f, g, h, a, b, c, d, e); - ROUND512_0_TO_15(e, f, g, h, a, b, c, d); - ROUND512_0_TO_15(d, e, f, g, h, a, b, c); - ROUND512_0_TO_15(c, d, e, f, g, h, a, b); - ROUND512_0_TO_15(b, c, d, e, f, g, h, a); - } - for (; i < 80 - 7;) { - ROUND512_16_TO_80(a, b, c, d, e, f, g, h); - ROUND512_16_TO_80(h, a, b, c, d, e, f, g); - ROUND512_16_TO_80(g, h, a, b, c, d, e, f); - ROUND512_16_TO_80(f, g, h, a, b, c, d, e); - ROUND512_16_TO_80(e, f, g, h, a, b, c, d); - ROUND512_16_TO_80(d, e, f, g, h, a, b, c); - ROUND512_16_TO_80(c, d, e, f, g, h, a, b); - ROUND512_16_TO_80(b, c, d, e, f, g, h, a); - } +#define R512_0 \ + ROUND512_0_TO_15(a, b, c, d, e, f, g, h); \ + ROUND512_0_TO_15(h, a, b, c, d, e, f, g); \ + ROUND512_0_TO_15(g, h, a, b, c, d, e, f); \ + ROUND512_0_TO_15(f, g, h, a, b, c, d, e); \ + ROUND512_0_TO_15(e, f, g, h, a, b, c, d); \ + ROUND512_0_TO_15(d, e, f, g, h, a, b, c); \ + ROUND512_0_TO_15(c, d, e, f, g, h, a, b); \ + ROUND512_0_TO_15(b, c, d, e, f, g, h, a) + + i = 0; + R512_0; R512_0; + +#define R512_16 \ + ROUND512_16_TO_80(a, b, c, d, e, f, g, h); \ + ROUND512_16_TO_80(h, a, b, c, d, e, f, g); \ + ROUND512_16_TO_80(g, h, a, b, c, d, e, f); \ + ROUND512_16_TO_80(f, g, h, a, b, c, d, e); \ + ROUND512_16_TO_80(e, f, g, h, a, b, c, d); \ + ROUND512_16_TO_80(d, e, f, g, h, a, b, c); \ + ROUND512_16_TO_80(c, d, e, f, g, h, a, b); \ + ROUND512_16_TO_80(b, c, d, e, f, g, h, a) + + R512_16; R512_16; R512_16; R512_16; + R512_16; R512_16; R512_16; R512_16; #endif state[0] += a; state[1] += b; |