zmodmul.c - libzahl - big integer library
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       zmodmul.c (365B)
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            1 /* See LICENSE file for copyright and license details. */
            2 #include "internals.h"
            3 
            4 
            5 void
            6 zmodmul(z_t a, z_t b, z_t c, z_t d)
            7 {
            8         /* TODO Montgomery modular multiplication */
            9         /* TODO Kochanski multiplication */
           10         if (unlikely(a == d)) {
           11                 zset(libzahl_tmp_modmul, d);
           12                 zmul(a, b, c);
           13                 zmod(a, a, libzahl_tmp_modmul);
           14         } else {
           15                 zmul(a, b, c);
           16                 zmod(a, a, d);
           17         }
           18 }