mpi_amd64.c (725B)
1 /* This Source Code Form is subject to the terms of the Mozilla Public 2 * License, v. 2.0. If a copy of the MPL was not distributed with this 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 4 5 #ifndef MPI_AMD64 6 #error This file only works on AMD64 platforms. 7 #endif 8 9 #include <mpi-priv.h> 10 11 /* 12 * MPI glue 13 * 14 */ 15 16 /* Presently, this is only used by the Montgomery arithmetic code. */ 17 /* c += a * b */ 18 void MPI_ASM_DECL 19 s_mpv_mul_d_add_prop(const mp_digit *a, mp_size a_len, 20 mp_digit b, mp_digit *c) 21 { 22 mp_digit w; 23 mp_digit d; 24 25 d = s_mpv_mul_add_vec64(c, a, a_len, b); 26 c += a_len; 27 while (d) { 28 w = c[0] + d; 29 d = (w < c[0] || w < d); 30 *c++ = w; 31 } 32 }