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revert 2% speed loss change (r8360) 

so VARIANT0 will be big and a few % faster, VARIANT1/2 are unaffected

Originally committed as revision 8371 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-03-13 00:35:18 +00:00
parent 5ae4975c65
commit d6cf780419
1 changed files with 15 additions and 6 deletions
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21
libavutil/sha1.c
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@ -19,10 +19,14 @@ typedef struct AVSHA1 {
#define R3b(v,w,x,y,z,i) z+(((w|x)&y)|(w&x))+block[i]+0x8F1BBCDC+rol(v,5);
#define R4b(v,w,x,y,z,i) z+( w^x ^y) +block[i]+0xCA62C1D6+rol(v,5);
#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y) +block[i]+0x5A827999+rol(v,5);w=rol(w,30);
#define R2(v,w,x,y,z,i) z+=( w^x ^y) +block[i]+0x6ED9EBA1+rol(v,5);w=rol(w,30);
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+block[i]+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define R4(v,w,x,y,z,i) z+=( w^x ^y) +block[i]+0xCA62C1D6+rol(v,5);w=rol(w,30);
#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 R0(v,w,x,y,z,i) z+=((w&(x^y))^y) +blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y) +blk (i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R2(v,w,x,y,z,i) z+=( w^x ^y) +blk (i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk (i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define R4(v,w,x,y,z,i) z+=( w^x ^y) +blk (i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
/* Hash a single 512-bit block. This is the core of the algorithm. */
@ -38,10 +42,14 @@ static void transform(uint32_t state[5], uint8_t buffer[64]){
unsigned int a, b, c, d, e;
#endif
#if defined (VARIANT1) || defined (VARIANT2)
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);
#else
memcpy(block, buffer, 64);
#endif
#ifdef VARIANT1
@ -111,10 +119,11 @@ static void transform(uint32_t state[5], uint8_t buffer[64]){
a= t;
}
#else
for(i=0; i<20; i+=5){
for(i=0; i<15; 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);
}
for(; i<40; i+=5){
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){
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){