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comparison bn_mp_reduce_is_2k.c @ 190:d8254fc979e9 libtommath-orig LTM_0.35

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Initial import of libtommath 0.35
author Matt Johnston <matt@ucc.asn.au>
date Fri, 06 May 2005 08:59:30 +0000
parents d29b64170cf0
children
comparison
equal deleted inserted replaced
142:d29b64170cf0 190:d8254fc979e9
20 { 20 {
21 int ix, iy, iw; 21 int ix, iy, iw;
22 mp_digit iz; 22 mp_digit iz;
23 23
24 if (a->used == 0) { 24 if (a->used == 0) {
25 return 0; 25 return MP_NO;
26 } else if (a->used == 1) { 26 } else if (a->used == 1) {
27 return 1; 27 return MP_YES;
28 } else if (a->used > 1) { 28 } else if (a->used > 1) {
29 iy = mp_count_bits(a); 29 iy = mp_count_bits(a);
30 iz = 1; 30 iz = 1;
31 iw = 1; 31 iw = 1;
32 32
33 /* Test every bit from the second digit up, must be 1 */ 33 /* Test every bit from the second digit up, must be 1 */
34 for (ix = DIGIT_BIT; ix < iy; ix++) { 34 for (ix = DIGIT_BIT; ix < iy; ix++) {
35 if ((a->dp[iw] & iz) == 0) { 35 if ((a->dp[iw] & iz) == 0) {
36 return 0; 36 return MP_NO;
37 } 37 }
38 iz <<= 1; 38 iz <<= 1;
39 if (iz > (mp_digit)MP_MASK) { 39 if (iz > (mp_digit)MP_MASK) {
40 ++iw; 40 ++iw;
41 iz = 1; 41 iz = 1;
42 } 42 }
43 } 43 }
44 } 44 }
45 return 1; 45 return MP_YES;
46 } 46 }
47 47
48 #endif 48 #endif