1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /*
27 * This file contains bignum implementation code that
28 * is specific to AMD64, but which is still more appropriate
29 * to write in C, rather than assembly language.
30 * bignum_amd64_asm.S does all the assembly language code
31 * for AMD64 specific bignum support. The assembly language
32 * source file has pure code, no data. Let the C compiler
33 * generate what is needed to handle the variations in
34 * data representation and addressing, for example,
35 * statically linked vs PIC.
36 */
37
38 #include "bignum.h"
39
40 /*
41 * The bignum interface deals with arrays of 64-bit "chunks" or "digits".
42 * Data should be aligned on 8-byte address boundaries for best performance.
43 */
44
45
46 void
big_mul_vec(BIG_CHUNK_TYPE * r,BIG_CHUNK_TYPE * a,int alen,BIG_CHUNK_TYPE * b,int blen)47 big_mul_vec(BIG_CHUNK_TYPE *r, BIG_CHUNK_TYPE *a, int alen,
48 BIG_CHUNK_TYPE *b, int blen)
49 {
50 int i;
51
52 r[alen] = big_mul_set_vec(r, a, alen, b[0]);
53 for (i = 1; i < blen; ++i)
54 r[alen + i] = big_mul_add_vec(r + i, a, alen, b[i]);
55 }
56