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10% smaller object file, 2% slower 

Originally committed as revision 8360 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-03-12 22:12:36 +00:00
parent 916bf03a69
commit 913cbde41a
1 changed files with 8 additions and 6 deletions
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14
libavutil/sha1.c
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@ -15,8 +15,8 @@ typedef struct AVSHA1 {
/* blk0() and blk() perform the initial expand. */
/* I got the idea of expanding during the round function from SSLeay */
#define blk0(i) (block[i] = be2me_32(block[i]))
#define blk(i) (block[i] = rol(block[i-3]^block[i-8]^block[i-14]^block[i-16],1))
#define blk0(i) (block[i])
#define blk(i) (block[i])
/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y) +blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
@ -31,7 +31,10 @@ static void transform(uint32_t state[5], uint8_t buffer[64]){
unsigned int a, b, c, d, e, i;
uint32_t block[80];
memcpy(block, buffer, 64);
for(i=0; i<16; i++)
block[i]= be2me_32(((uint32_t*)buffer)[i]);
for(;i<80; i++)
block[i]= rol(block[i-3]^block[i-8]^block[i-14]^block[i-16],1);
/* Copy context->state[] to working vars */
a = state[0];
@ -40,11 +43,10 @@ static void transform(uint32_t state[5], uint8_t buffer[64]){
d = state[3];
e = state[4];
for(i=0; i<15; i+=5){
for(i=0; i<20; i+=5){
R0(a,b,c,d,e,0+i); R0(e,a,b,c,d,1+i); R0(d,e,a,b,c,2+i); R0(c,d,e,a,b,3+i); R0(b,c,d,e,a,4+i);
}
R0(a,b,c,d,e,15); R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
for(i=20; i<40; i+=5){
for(; i<40; i+=5){
R2(a,b,c,d,e,0+i); R2(e,a,b,c,d,1+i); R2(d,e,a,b,c,2+i); R2(c,d,e,a,b,3+i); R2(b,c,d,e,a,4+i);
}
for(; i<60; i+=5){