43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* libgcc routines for RL78
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Copyright (C) 2005-2017 Free Software Foundation, Inc.
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Contributed by Red Hat.
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This file is part of GCC.
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GCC 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
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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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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UINT_TYPE C3(__mul,NAME_MODE,3) (UINT_TYPE, UINT_TYPE);
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UINT_TYPE
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C3(__mul,NAME_MODE,3) (UINT_TYPE a, UINT_TYPE b)
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{
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UINT_TYPE rv = 0;
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char bit;
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for (bit=0; b && bit<sizeof(UINT_TYPE)*8; bit++)
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{
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if (b & 1)
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rv += a;
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a <<= 1;
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b >>= 1;
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}
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return rv;
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}
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