[Ffmpeg-cvslog] r8372 - trunk/libavutil/sha1.c
michael
subversion
Tue Mar 13 02:13:38 CET 2007
Author: michael
Date: Tue Mar 13 02:13:38 2007
New Revision: 8372
Modified:
trunk/libavutil/sha1.c
Log:
factorize VARIANT2 (smaller and slower)
Modified: trunk/libavutil/sha1.c
==============================================================================
--- trunk/libavutil/sha1.c (original)
+++ trunk/libavutil/sha1.c Tue Mar 13 02:13:38 2007
@@ -86,32 +86,15 @@ static void transform(uint32_t state[5],
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);
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