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