diff options
Diffstat (limited to 'libtommath/bn_mp_mul.c')
| -rw-r--r-- | libtommath/bn_mp_mul.c | 69 |
1 files changed, 36 insertions, 33 deletions
diff --git a/libtommath/bn_mp_mul.c b/libtommath/bn_mp_mul.c index fc024be..e7613a3 100644 --- a/libtommath/bn_mp_mul.c +++ b/libtommath/bn_mp_mul.c @@ -1,4 +1,4 @@ -#include <tommath.h> +#include "tommath_private.h" #ifdef BN_MP_MUL_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * @@ -11,52 +11,55 @@ * * The library is free for all purposes without any express * guarantee it works. - * - * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com */ /* high level multiplication (handles sign) */ -int mp_mul (mp_int * a, mp_int * b, mp_int * c) +int mp_mul(const mp_int *a, const mp_int *b, mp_int *c) { - int res, neg; - neg = (a->sign == b->sign) ? MP_ZPOS : MP_NEG; + int res, neg; + neg = (a->sign == b->sign) ? MP_ZPOS : MP_NEG; - /* use Toom-Cook? */ + /* use Toom-Cook? */ #ifdef BN_MP_TOOM_MUL_C - if (MIN (a->used, b->used) >= TOOM_MUL_CUTOFF) { - res = mp_toom_mul(a, b, c); - } else + if (MIN(a->used, b->used) >= TOOM_MUL_CUTOFF) { + res = mp_toom_mul(a, b, c); + } else #endif #ifdef BN_MP_KARATSUBA_MUL_C - /* use Karatsuba? */ - if (MIN (a->used, b->used) >= KARATSUBA_MUL_CUTOFF) { - res = mp_karatsuba_mul (a, b, c); - } else + /* use Karatsuba? */ + if (MIN(a->used, b->used) >= KARATSUBA_MUL_CUTOFF) { + res = mp_karatsuba_mul(a, b, c); + } else #endif - { - /* can we use the fast multiplier? - * - * The fast multiplier can be used if the output will - * have less than MP_WARRAY digits and the number of - * digits won't affect carry propagation - */ - int digs = a->used + b->used + 1; + { + /* can we use the fast multiplier? + * + * The fast multiplier can be used if the output will + * have less than MP_WARRAY digits and the number of + * digits won't affect carry propagation + */ + int digs = a->used + b->used + 1; #ifdef BN_FAST_S_MP_MUL_DIGS_C - if ((digs < MP_WARRAY) && - MIN(a->used, b->used) <= - (1 << ((CHAR_BIT * sizeof (mp_word)) - (2 * DIGIT_BIT)))) { - res = fast_s_mp_mul_digs (a, b, c, digs); - } else + if ((digs < (int)MP_WARRAY) && + (MIN(a->used, b->used) <= + (int)(1u << (((size_t)CHAR_BIT * sizeof(mp_word)) - (2u * (size_t)DIGIT_BIT))))) { + res = fast_s_mp_mul_digs(a, b, c, digs); + } else #endif + { #ifdef BN_S_MP_MUL_DIGS_C - res = s_mp_mul (a, b, c); /* uses s_mp_mul_digs */ + res = s_mp_mul(a, b, c); /* uses s_mp_mul_digs */ #else - res = MP_VAL; + res = MP_VAL; #endif - - } - c->sign = (c->used > 0) ? neg : MP_ZPOS; - return res; + } + } + c->sign = (c->used > 0) ? neg : MP_ZPOS; + return res; } #endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ |