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regularize options which control size/speed trade

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2011-09-10 13:25:57 +02:00
parent 202a1b9284
commit 522041ee7b
17 changed files with 69 additions and 66 deletions
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26
libbb/hash_md5prime.c
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@ -59,7 +59,7 @@
* Completely removed static PADDING array.
*
* Reintroduced the loop unrolling in md5_transform and added the
* MD5_SIZE_VS_SPEED option for configurability. Define below as:
* MD5_SMALL option for configurability. Define below as:
* 0 fully unrolled loops
* 1 partially unrolled (4 ops per loop)
* 2 no unrolling -- introduces the need to swap 4 variables (slow)
@ -75,12 +75,12 @@
#include "libbb.h"
/* 1: fastest, 3: smallest */
#if CONFIG_MD5_SIZE_VS_SPEED < 1
# define MD5_SIZE_VS_SPEED 1
#elif CONFIG_MD5_SIZE_VS_SPEED > 3
# define MD5_SIZE_VS_SPEED 3
#if CONFIG_MD5_SMALL < 1
# define MD5_SMALL 1
#elif CONFIG_MD5_SMALL > 3
# define MD5_SMALL 3
#else
# define MD5_SIZE_VS_SPEED CONFIG_MD5_SIZE_VS_SPEED
# define MD5_SMALL CONFIG_MD5_SMALL
#endif
#if BB_LITTLE_ENDIAN
@ -152,7 +152,7 @@ memcpy32_le2cpu(uint32_t *output, const unsigned char *input, unsigned len)
static void md5_transform(uint32_t state[4], const unsigned char block[64])
{
uint32_t a, b, c, d, x[16];
#if MD5_SIZE_VS_SPEED > 1
#if MD5_SMALL > 1
uint32_t temp;
const unsigned char *ps;
@ -162,9 +162,9 @@ static void md5_transform(uint32_t state[4], const unsigned char block[64])
4, 11, 16, 23,
6, 10, 15, 21
};
#endif /* MD5_SIZE_VS_SPEED > 1 */
#endif /* MD5_SMALL > 1 */
#if MD5_SIZE_VS_SPEED > 0
#if MD5_SMALL > 0
const uint32_t *pc;
const unsigned char *pp;
int i;
@ -198,7 +198,7 @@ static void md5_transform(uint32_t state[4], const unsigned char block[64])
0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9 /* 4 */
};
#endif /* MD5_SIZE_VS_SPEED > 0 */
#endif /* MD5_SMALL > 0 */
memcpy32_le2cpu(x, block, 64);
@ -207,7 +207,7 @@ static void md5_transform(uint32_t state[4], const unsigned char block[64])
c = state[2];
d = state[3];
#if MD5_SIZE_VS_SPEED > 2
#if MD5_SMALL > 2
pc = C;
pp = P;
ps = S - 4;
@ -233,7 +233,7 @@ static void md5_transform(uint32_t state[4], const unsigned char block[64])
temp += b;
a = d; d = c; c = b; b = temp;
}
#elif MD5_SIZE_VS_SPEED > 1
#elif MD5_SMALL > 1
pc = C;
pp = P;
ps = S;
@ -260,7 +260,7 @@ static void md5_transform(uint32_t state[4], const unsigned char block[64])
II(a, b, c, d, x[*pp], ps[i & 0x3], *pc); pp++; pc++;
temp = d; d = c; c = b; b = a; a = temp;
}
#elif MD5_SIZE_VS_SPEED > 0
#elif MD5_SMALL > 0
pc = C;
pp = P;
/* Round 1 */