2 #ifdef BN_MP_REDUCE_IS_2K_C
3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality.
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.
12 * The library is free for all purposes without any express
15 * Tom St Denis, tomstdenis@iahu.ca, http://math.libtomcrypt.org
18 /* determines if mp_reduce_2k can be used */
19 int mp_reduce_is_2k(mp_int *a)
26 } else if (a->used == 1) {
28 } else if (a->used > 1) {
29 iy = mp_count_bits(a);
33 /* Test every bit from the second digit up, must be 1 */
34 for (ix = DIGIT_BIT; ix < iy; ix++) {
35 if ((a->dp[iw] & iz) == 0) {
39 if (iz > (mp_digit)MP_MASK) {