]> git.ipfire.org Git - people/ms/u-boot.git/blame - lib_nios2/mult.c
rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / lib_nios2 / mult.c
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1/*
2 * This file is part of GNU CC.
3 *
4 * GNU CC is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published
6 * by the Free Software Foundation; either version 2, or (at your
7 * option) any later version.
8 *
9 * GNU CC is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public
15 * License along with GNU CC; see the file COPYING. If not, write
16 * to the Free Software Foundation, 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 */
19
20
21#include <common.h>
22
6d0f6bcf 23#if !defined(CONFIG_SYS_NIOS_MULT_HW) && !defined(CONFIG_SYS_NIOS_MULT_MSTEP)
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24
25#include "math.h"
26
27USItype __mulsi3 (USItype a, USItype b)
28{
29 USItype c = 0;
30
31 while (a != 0) {
32 if (a & 1)
33 c += b;
34 a >>= 1;
35 b <<= 1;
36 }
37
38 return c;
39}
40
41
42UHItype __mulhi3 (UHItype a, UHItype b)
43{
44 UHItype c = 0;
45
46 while (a != 0) {
47 if (a & 1)
48 c += b;
49 a >>= 1;
50 b <<= 1;
51 }
52
53 return c;
54}
55
6d0f6bcf 56#endif /*!defined(CONFIG_SYS_NIOS_MULT_HW) && !defined(CONFIG_SYS_NIOS_MULT_MSTEP) */