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avr-crypto-lib
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squeezing out a little more speed

This commit is contained in:
bg 2009-01-14 18:44:53 +00:00
parent b3daeff2bc
commit 398d051849
2 changed files with 40 additions and 29 deletions
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37
aes_enc-asm.S
View File

@ -207,7 +207,7 @@ aes_encrypt_core:
eor T1, xREDUCER eor T1, xREDUCER
3: 3:
eor T1, r1 eor T1, r1
eor T1, ST01 eor ST01, T1
mov T2, ST02 mov T2, ST02
eor T2, ST03 eor T2, ST03
@ -216,7 +216,7 @@ aes_encrypt_core:
eor T2, xREDUCER eor T2, xREDUCER
3: 3:
eor T2, r1 eor T2, r1
eor T2, ST02 eor ST02, T2
mov T3, ST03 mov T3, ST03
eor T3, ST00 eor T3, ST00
@ -225,13 +225,9 @@ aes_encrypt_core:
eor T3, xREDUCER eor T3, xREDUCER
3: 3:
eor T3, r1 eor T3, r1
eor T3, ST03 eor ST03, T3
mov ST00, T0 mov ST00, T0
mov ST01, T1
mov ST02, T2
mov ST03, T3
mov r1, ST10 mov r1, ST10
eor r1, ST11 eor r1, ST11
@ -254,7 +250,7 @@ aes_encrypt_core:
eor T1, xREDUCER eor T1, xREDUCER
3: 3:
eor T1, r1 eor T1, r1
eor T1, ST11 eor ST11, T1
mov T2, ST12 mov T2, ST12
eor T2, ST13 eor T2, ST13
@ -263,7 +259,7 @@ aes_encrypt_core:
eor T2, xREDUCER eor T2, xREDUCER
3: 3:
eor T2, r1 eor T2, r1
eor T2, ST12 eor ST12, T2
mov T3, ST13 mov T3, ST13
eor T3, ST10 eor T3, ST10
@ -272,12 +268,9 @@ aes_encrypt_core:
eor T3, xREDUCER eor T3, xREDUCER
3: 3:
eor T3, r1 eor T3, r1
eor T3, ST13 eor ST13, T3
mov ST10, T0 mov ST10, T0
mov ST11, T1
mov ST12, T2
mov ST13, T3
mov r1, ST20 mov r1, ST20
eor r1, ST21 eor r1, ST21
@ -300,7 +293,7 @@ aes_encrypt_core:
eor T1, xREDUCER eor T1, xREDUCER
3: 3:
eor T1, r1 eor T1, r1
eor T1, ST21 eor ST21, T1
mov T2, ST22 mov T2, ST22
eor T2, ST23 eor T2, ST23
@ -309,7 +302,7 @@ aes_encrypt_core:
eor T2, xREDUCER eor T2, xREDUCER
3: 3:
eor T2, r1 eor T2, r1
eor T2, ST22 eor ST22, T2
mov T3, ST23 mov T3, ST23
eor T3, ST20 eor T3, ST20
@ -318,12 +311,9 @@ aes_encrypt_core:
eor T3, xREDUCER eor T3, xREDUCER
3: 3:
eor T3, r1 eor T3, r1
eor T3, ST23 eor ST23, T3
mov ST20, T0 mov ST20, T0
mov ST21, T1
mov ST22, T2
mov ST23, T3
mov r1, ST30 mov r1, ST30
eor r1, ST31 eor r1, ST31
@ -346,7 +336,7 @@ aes_encrypt_core:
eor T1, xREDUCER eor T1, xREDUCER
3: 3:
eor T1, r1 eor T1, r1
eor T1, ST31 eor ST31, T1
mov T2, ST32 mov T2, ST32
eor T2, ST33 eor T2, ST33
@ -355,7 +345,7 @@ aes_encrypt_core:
eor T2, xREDUCER eor T2, xREDUCER
3: 3:
eor T2, r1 eor T2, r1
eor T2, ST32 eor ST32, T2
mov T3, ST33 mov T3, ST33
eor T3, ST30 eor T3, ST30
@ -364,12 +354,9 @@ aes_encrypt_core:
eor T3, xREDUCER eor T3, xREDUCER
3: 3:
eor T3, r1 eor T3, r1
eor T3, ST33 eor ST33, T3
mov ST30, T0 mov ST30, T0
mov ST31, T1
mov ST32, T2
mov ST33, T3
/* mix colums (rows) done */ /* mix colums (rows) done */

32
host/gf256_table_gen.c
View File

@ -43,6 +43,23 @@ char* fmt_strings[]={"%d", "%3d",
"0x%X", "0x%2.2X", "0x%X", "0x%2.2X",
"0%o", "0%3o"}; "0%o", "0%3o"};
void print_help(void){
puts(
"gf256_table_gen [-cCbBdhoaApP] [-l min] [-u max]\n"
" [-f formatstring] [-o file] -r reducer value {values} \n"
"\n"
" -c/-C turn C-header on/off (default: on)\n"
" -b/-B turn braces on/off (defaul: on)\n"
" -d/-h/-8 print values in decimal/hexadecimal/octal (default: hexadecimal)\n"
" -a/-a turn alignment on/off (default: on)\n"
" -p/-P turn base prefix on/off (default: on)\n"
" -r reducer reducer is the reduction polynomial represented as numeric value\n"
" -l min starting value for multiplication table (default: 0)\n"
" -u max upper limit value for multiplication table (default: 255)\n"
" -f formatstring string for formating the output of a singel multiplicxation\n"
" -o file outputfile\n"
}
int main(int argc, char** argv){ int main(int argc, char** argv){
int i,j; int i,j;
int c; int c;
@ -65,6 +82,7 @@ int main(int argc, char** argv){
/* These options don't set a flag. /* These options don't set a flag.
We distinguish them by their indices. */ We distinguish them by their indices. */
{"help", no_argument , 0, '?'},
{"reducer", required_argument, 0, 'r'}, {"reducer", required_argument, 0, 'r'},
{"min", required_argument, 0, 'l'}, {"min", required_argument, 0, 'l'},
{"max", required_argument, 0, 'u'}, {"max", required_argument, 0, 'u'},
@ -76,7 +94,7 @@ int main(int argc, char** argv){
unsigned long ul_a; unsigned long ul_a;
int columns=8; int columns=8;
unsigned long ul_reducer=0x1b, max=0xff, min=0x00; unsigned long ul_reducer=0x00, max=0xff, min=0x00;
uint8_t reducer, a; uint8_t reducer, a;
char** eptr; char** eptr;
FILE* of = stdout; FILE* of = stdout;
@ -90,7 +108,7 @@ int main(int argc, char** argv){
case 'B': print_braces=0; break; case 'B': print_braces=0; break;
case 'h': print_base = 1; break; case 'h': print_base = 1; break;
case 'd': print_base = 0; break; case 'd': print_base = 0; break;
case 'o': print_base = 2; break; case '8': print_base = 2; break;
case 'a': print_align =1; break; case 'a': print_align =1; break;
case 'A': print_align =0; break; case 'A': print_align =0; break;
case 'p': print_prefix=1; break; case 'p': print_prefix=1; break;
@ -117,10 +135,16 @@ int main(int argc, char** argv){
} }
break; break;
case 'f': fmt = optarg; break; case 'f': fmt = optarg; break;
default: break; case '?':
default:
print_help();
break;
} }
} }
reducer = ul_reducer&0xff; if(!reducer = ul_reducer&0xff){
fprintf(stderr, "You must specify a reductionpolynomial!\n", argv[i]);
return -1;
}
if(!fmt) if(!fmt)
fmt = fmt_strings[print_prefix*6+print_base*2+print_align]; fmt = fmt_strings[print_prefix*6+print_base*2+print_align];