1/* Copyright (C) 2003-2022 Free Software Foundation, Inc. 2 3This file is part of GCC. 4 5GCC is free software; you can redistribute it and/or modify it under 6the terms of the GNU General Public License as published by the Free 7Software Foundation; either version 3, or (at your option) any later 8version. 9 10GCC is distributed in the hope that it will be useful, but WITHOUT ANY 11WARRANTY; without even the implied warranty of MERCHANTABILITY or 12FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13for more details. 14 15Under Section 7 of GPL version 3, you are granted additional 16permissions described in the GCC Runtime Library Exception, version 173.1, as published by the Free Software Foundation. 18 19You should have received a copy of the GNU General Public License and 20a copy of the GCC Runtime Library Exception along with this program; 21see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 22<http://www.gnu.org/licenses/>. */ 23 24typedef unsigned int USItype __attribute__ ((mode (SI))); 25 26USItype 27__mulsi3 (USItype a, USItype b) 28{ 29 USItype c = 0; 30 31 while (a != 0) 32 { 33 if (a & 1) 34 c += b; 35 a >>= 1; 36 b <<= 1; 37 } 38 39 return c; 40} 41