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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgcc/] [config/] [lm32/] [_mulsi3.c] - Blame information for rev 734

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1 734 jeremybenn
/* _mulsi3 for Lattice Mico32.
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   Contributed by Jon Beniston <jon@beniston.com>
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   Copyright (C) 2009 Free Software Foundation, Inc.
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   This file is free software; you can redistribute it and/or modify it
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   under the terms of the GNU General Public License as published by the
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   Free Software Foundation; either version 3, or (at your option) any
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   later version.
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   This file is distributed in the hope that it will be useful, but
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   WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   General Public License for more details.
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   Under Section 7 of GPL version 3, you are granted additional
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   permissions described in the GCC Runtime Library Exception, version
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   3.1, as published by the Free Software Foundation.
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   You should have received a copy of the GNU General Public License and
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   a copy of the GCC Runtime Library Exception along with this program;
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   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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   <http://www.gnu.org/licenses/>. */
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#include "libgcc_lm32.h"
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/* Integer multiplication.  */
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USItype
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__mulsi3 (USItype a, USItype b)
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{
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  USItype result;
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  result = 0;
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  if (a == 0)
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    return 0;
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  while (b != 0)
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    {
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      if (b & 1)
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        result += a;
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      a <<= 1;
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      b >>= 1;
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    }
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  return result;
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}

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