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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [libgcc/] [config/] [lm32/] [_mulsi3.c] - Rev 320
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/* _mulsi3 for Lattice Mico32. Contributed by Jon Beniston <jon@beniston.com> Copyright (C) 2009 Free Software Foundation, Inc. This file is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. This file is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ #include "libgcc_lm32.h" /* Integer multiplication. */ USItype __mulsi3 (USItype a, USItype b) { USItype result; result = 0; if (a == 0) return 0; while (b != 0) { if (b & 1) result += a; a <<= 1; b >>= 1; } return result; }
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