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Diffstat (limited to 'libgcc/config/epiphany/mulsi3.c')
-rw-r--r-- | libgcc/config/epiphany/mulsi3.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/libgcc/config/epiphany/mulsi3.c b/libgcc/config/epiphany/mulsi3.c new file mode 100644 index 00000000000..148361d92be --- /dev/null +++ b/libgcc/config/epiphany/mulsi3.c @@ -0,0 +1,39 @@ +/* Generic 32 bit multiply. + Copyright (C) 2009 Free Software Foundation, Inc. + Contributed by Embecosm on behalf of Adapteva, Inc. + +This file is part of GCC. + +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/>. */ + +unsigned int +__mulsi3 (unsigned int a, unsigned int b) +{ + unsigned int r = 0; + + while (a) + { + if (a & 1) + r += b; + a >>= 1; + b <<= 1; + } + return r; +} |