1#include <tommath.h> 2#ifdef BN_MP_SQR_C 3/* LibTomMath, multiple-precision integer library -- Tom St Denis 4 * 5 * LibTomMath is a library that provides multiple-precision 6 * integer arithmetic as well as number theoretic functionality. 7 * 8 * The library was designed directly after the MPI library by 9 * Michael Fromberger but has been written from scratch with 10 * additional optimizations in place. 11 * 12 * The library is free for all purposes without any express 13 * guarantee it works. 14 * 15 * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com 16 */ 17 18/* computes b = a*a */ 19int 20mp_sqr (mp_int * a, mp_int * b) 21{ 22 int res; 23 24#ifdef BN_MP_TOOM_SQR_C 25 /* use Toom-Cook? */ 26 if (a->used >= TOOM_SQR_CUTOFF) { 27 res = mp_toom_sqr(a, b); 28 /* Karatsuba? */ 29 } else 30#endif 31#ifdef BN_MP_KARATSUBA_SQR_C 32if (a->used >= KARATSUBA_SQR_CUTOFF) { 33 res = mp_karatsuba_sqr (a, b); 34 } else 35#endif 36 { 37#ifdef BN_FAST_S_MP_SQR_C 38 /* can we use the fast comba multiplier? */ 39 if ((a->used * 2 + 1) < MP_WARRAY && 40 a->used < 41 (1 << (sizeof(mp_word) * CHAR_BIT - 2*DIGIT_BIT - 1))) { 42 res = fast_s_mp_sqr (a, b); 43 } else 44#endif 45#ifdef BN_S_MP_SQR_C 46 res = s_mp_sqr (a, b); 47#else 48 res = MP_VAL; 49#endif 50 } 51 b->sign = MP_ZPOS; 52 return res; 53} 54#endif 55 56/* $Source: /cvs/libtom/libtommath/bn_mp_sqr.c,v $ */ 57/* $Revision: 1.3 $ */ 58/* $Date: 2006/03/31 14:18:44 $ */ 59