| /* _mulsi3 for Lattice Mico32. |
| Contributed by Jon Beniston <jon@beniston.com> |
| |
| Copyright (C) 2009-2021 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; |
| } |