commit f11a6dcedefc58e454957536812fe27b1ef8fb52
parent 532debba7cb1964cebcf6b352c1a5be7f8af640f
Author: Evgeny Grin (Karlson2k) <k2k@narod.ru>
Date: Wed, 14 Sep 2022 09:37:22 +0300
md5: improved performance of the first round on LE arches
Diffstat:
| M | src/microhttpd/md5.c | | | 100 | +++++++++++++++++++++++++++++++++++++++++++++++++++---------------------------- |
1 file changed, 65 insertions(+), 35 deletions(-)
diff --git a/src/microhttpd/md5.c b/src/microhttpd/md5.c
@@ -120,41 +120,71 @@ md5_transform (uint32_t H[MD5_HASH_SIZE_WORDS],
/* Round 1. */
- MD5STEP_R1 (A, B, C, D, X[0] = GET_X_FROM_DATA (M, 0), 7, \
- UINT32_C (0xd76aa478));
- MD5STEP_R1 (D, A, B, C, X[1] = GET_X_FROM_DATA (M, 1), 12, \
- UINT32_C (0xe8c7b756));
- MD5STEP_R1 (C, D, A, B, X[2] = GET_X_FROM_DATA (M, 2), 17, \
- UINT32_C (0x242070db));
- MD5STEP_R1 (B, C, D, A, X[3] = GET_X_FROM_DATA (M, 3), 22, \
- UINT32_C (0xc1bdceee));
-
- MD5STEP_R1 (A, B, C, D, X[4] = GET_X_FROM_DATA (M, 4), 7, \
- UINT32_C (0xf57c0faf));
- MD5STEP_R1 (D, A, B, C, X[5] = GET_X_FROM_DATA (M, 5), 12, \
- UINT32_C (0x4787c62a));
- MD5STEP_R1 (C, D, A, B, X[6] = GET_X_FROM_DATA (M, 6), 17, \
- UINT32_C (0xa8304613));
- MD5STEP_R1 (B, C, D, A, X[7] = GET_X_FROM_DATA (M, 7), 22, \
- UINT32_C (0xfd469501));
-
- MD5STEP_R1 (A, B, C, D, X[8] = GET_X_FROM_DATA (M, 8), 7, \
- UINT32_C (0x698098d8));
- MD5STEP_R1 (D, A, B, C, X[9] = GET_X_FROM_DATA (M, 9), 12, \
- UINT32_C (0x8b44f7af));
- MD5STEP_R1 (C, D, A, B, X[10] = GET_X_FROM_DATA (M, 10), 17, \
- UINT32_C (0xffff5bb1));
- MD5STEP_R1 (B, C, D, A, X[11] = GET_X_FROM_DATA (M, 11), 22, \
- UINT32_C (0x895cd7be));
-
- MD5STEP_R1 (A, B, C, D, X[12] = GET_X_FROM_DATA (M, 12), 7, \
- UINT32_C (0x6b901122));
- MD5STEP_R1 (D, A, B, C, X[13] = GET_X_FROM_DATA (M, 13), 12, \
- UINT32_C (0xfd987193));
- MD5STEP_R1 (C, D, A, B, X[14] = GET_X_FROM_DATA (M, 14), 17, \
- UINT32_C (0xa679438e));
- MD5STEP_R1 (B, C, D, A, X[15] = GET_X_FROM_DATA (M, 15), 22, \
- UINT32_C (0x49b40821));
+#if ! defined(MHD_FAVOR_SMALL_CODE) && (_MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN)
+ if ((const void *) X == M)
+ {
+ /* The input data is already in the data buffer X[] in correct bytes
+ order. */
+ MD5STEP_R1 (A, B, C, D, X[0], 7, UINT32_C (0xd76aa478));
+ MD5STEP_R1 (D, A, B, C, X[1], 12, UINT32_C (0xe8c7b756));
+ MD5STEP_R1 (C, D, A, B, X[2], 17, UINT32_C (0x242070db));
+ MD5STEP_R1 (B, C, D, A, X[3], 22, UINT32_C (0xc1bdceee));
+
+ MD5STEP_R1 (A, B, C, D, X[4], 7, UINT32_C (0xf57c0faf));
+ MD5STEP_R1 (D, A, B, C, X[5], 12, UINT32_C (0x4787c62a));
+ MD5STEP_R1 (C, D, A, B, X[6], 17, UINT32_C (0xa8304613));
+ MD5STEP_R1 (B, C, D, A, X[7], 22, UINT32_C (0xfd469501));
+
+ MD5STEP_R1 (A, B, C, D, X[8], 7, UINT32_C (0x698098d8));
+ MD5STEP_R1 (D, A, B, C, X[9], 12, UINT32_C (0x8b44f7af));
+ MD5STEP_R1 (C, D, A, B, X[10], 17, UINT32_C (0xffff5bb1));
+ MD5STEP_R1 (B, C, D, A, X[11], 22, UINT32_C (0x895cd7be));
+
+ MD5STEP_R1 (A, B, C, D, X[12], 7, UINT32_C (0x6b901122));
+ MD5STEP_R1 (D, A, B, C, X[13], 12, UINT32_C (0xfd987193));
+ MD5STEP_R1 (C, D, A, B, X[14], 17, UINT32_C (0xa679438e));
+ MD5STEP_R1 (B, C, D, A, X[15], 22, UINT32_C (0x49b40821));
+ }
+ else /* Combined with the next 'if' */
+#endif /* ! MHD_FAVOR_SMALL_CODE && (_MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN) */
+ if (1)
+ {
+ MD5STEP_R1 (A, B, C, D, X[0] = GET_X_FROM_DATA (M, 0), 7, \
+ UINT32_C (0xd76aa478));
+ MD5STEP_R1 (D, A, B, C, X[1] = GET_X_FROM_DATA (M, 1), 12, \
+ UINT32_C (0xe8c7b756));
+ MD5STEP_R1 (C, D, A, B, X[2] = GET_X_FROM_DATA (M, 2), 17, \
+ UINT32_C (0x242070db));
+ MD5STEP_R1 (B, C, D, A, X[3] = GET_X_FROM_DATA (M, 3), 22, \
+ UINT32_C (0xc1bdceee));
+
+ MD5STEP_R1 (A, B, C, D, X[4] = GET_X_FROM_DATA (M, 4), 7, \
+ UINT32_C (0xf57c0faf));
+ MD5STEP_R1 (D, A, B, C, X[5] = GET_X_FROM_DATA (M, 5), 12, \
+ UINT32_C (0x4787c62a));
+ MD5STEP_R1 (C, D, A, B, X[6] = GET_X_FROM_DATA (M, 6), 17, \
+ UINT32_C (0xa8304613));
+ MD5STEP_R1 (B, C, D, A, X[7] = GET_X_FROM_DATA (M, 7), 22, \
+ UINT32_C (0xfd469501));
+
+ MD5STEP_R1 (A, B, C, D, X[8] = GET_X_FROM_DATA (M, 8), 7, \
+ UINT32_C (0x698098d8));
+ MD5STEP_R1 (D, A, B, C, X[9] = GET_X_FROM_DATA (M, 9), 12, \
+ UINT32_C (0x8b44f7af));
+ MD5STEP_R1 (C, D, A, B, X[10] = GET_X_FROM_DATA (M, 10), 17, \
+ UINT32_C (0xffff5bb1));
+ MD5STEP_R1 (B, C, D, A, X[11] = GET_X_FROM_DATA (M, 11), 22, \
+ UINT32_C (0x895cd7be));
+
+ MD5STEP_R1 (A, B, C, D, X[12] = GET_X_FROM_DATA (M, 12), 7, \
+ UINT32_C (0x6b901122));
+ MD5STEP_R1 (D, A, B, C, X[13] = GET_X_FROM_DATA (M, 13), 12, \
+ UINT32_C (0xfd987193));
+ MD5STEP_R1 (C, D, A, B, X[14] = GET_X_FROM_DATA (M, 14), 17, \
+ UINT32_C (0xa679438e));
+ MD5STEP_R1 (B, C, D, A, X[15] = GET_X_FROM_DATA (M, 15), 22, \
+ UINT32_C (0x49b40821));
+ }
/* One step of round 2 of MD5 computation, see RFC 1321, Clause 3.4 (step 4).
The original function was modified to use X[k] and T[i] as
