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replace / by >> this makes the .o ~150 bytes smaller 

Originally committed as revision 7525 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-01-15 01:01:56 +00:00
parent e42244e9df
commit 96b103086e
1 changed files with 4 additions and 4 deletions
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8
libavutil/aes.c
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@ -101,7 +101,7 @@ void av_aes_encrypt(AVAES *a){
static void init_multbl2(uint8_t tbl[1024], int c[4], uint8_t *log8, uint8_t *alog8, uint8_t *sbox){
int i, j;
for(i=0; i<1024; i++){
int x= sbox[i/4];
int x= sbox[i>>2];
if(x) tbl[i]= alog8[ log8[x] + log8[c[i&3]] ];
}
#ifndef CONFIG_SMALL
@ -116,7 +116,7 @@ AVAES *av_aes_init(uint8_t *key, int key_bits, int decrypt) {
AVAES *a;
int i, j, t, rconpointer = 0;
uint8_t tk[8][4];
int KC= key_bits/32;
int KC= key_bits>>5;
int rounds= KC + 6;
uint8_t log8[256];
uint8_t alog8[512];
@ -158,7 +158,7 @@ AVAES *av_aes_init(uint8_t *key, int key_bits, int decrypt) {
tk[0][0] ^= rcon[rconpointer++];
for(j = 1; j < KC; j++){
if(KC != 8 || j != KC/2)
if(KC != 8 || j != KC>>1)
for(i = 0; i < 4; i++) tk[j][i] ^= tk[j-1][i];
else
for(i = 0; i < 4; i++) tk[j][i] ^= sbox[tk[j-1][i]];
@ -172,7 +172,7 @@ AVAES *av_aes_init(uint8_t *key, int key_bits, int decrypt) {
mix(a->round_key[i], dec_multbl);
}
}else{
for(i=0; i<(rounds+1)/2; i++){
for(i=0; i<(rounds+1)>>1; i++){
for(j=0; j<16; j++)
FFSWAP(int, a->round_key[i][0][j], a->round_key[rounds-i][0][j]);
}