1 /* LibTomMath, multiple-precision integer library -- Tom St Denis
3 * LibTomMath is library that provides for multiple-precision
4 * integer arithmetic as well as number theoretic functionality.
6 * The library is designed directly after the MPI library by
7 * Michael Fromberger but has been written from scratch with
8 * additional optimizations in place.
10 * The library is free for all purposes without any express
13 * Tom St Denis, tomstdenis@iahu.ca, http://math.libtomcrypt.org
17 /* set a 32-bit const */
19 mp_set_int (mp_int * a, unsigned int b)
24 /* set four bits at a time */
25 for (x = 0; x < 8; x++) {
26 /* shift the number up four bits */
27 if ((res = mp_mul_2d (a, 4, a)) != MP_OKAY) {
31 /* OR in the top four bits of the source */
32 a->dp[0] |= (b >> 28) & 15;
34 /* shift the source up to the next four bits */
37 /* ensure that digits are not clamped off */