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factorize VARIANT2 (smaller and slower) 

Originally committed as revision 8372 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-03-13 01:13:38 +00:00
parent d6cf780419
commit 2fa3a22d23
1 changed files with 9 additions and 26 deletions
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35
libavutil/sha1.c
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@ -86,32 +86,15 @@ static void transform(uint32_t state[5], uint8_t buffer[64]){
d = state[3];
e = state[4];
#ifdef VARIANT2
for(i=0; i<20; i++){
int t= R0b(a,b,c,d,e,i);
e= d;
d= c;
c= rol(b,30);
b= a;
a= t;
}
for(; i<40; i++){
int t= R2b(a,b,c,d,e,i);
e= d;
d= c;
c= rol(b,30);
b= a;
a= t;
}
for(; i<60; i++){
int t= R3b(a,b,c,d,e,i);
e= d;
d= c;
c= rol(b,30);
b= a;
a= t;
}
for(; i<80; i++){
int t= R4b(a,b,c,d,e,i);
for(i=0; i<80; i++){
int t= e+block[i]+rol(a,5);;
if(i<40){
if(i<20) t+= ((b&(c^d))^d) +0x5A827999;
else t+= ( b^c ^d) +0x6ED9EBA1;
}else{
if(i<60) t+= (((b|c)&d)|(b&c))+0x8F1BBCDC;
else t+= ( b^c ^d) +0xCA62C1D6;
}
e= d;
d= c;
c= rol(b,30);