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62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/*
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* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include <stdint.h>
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#ifdef __i386__
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uint64_t
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__udivmoddi4 (uint64_t num, uint64_t den, uint64_t *rem_p)
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{
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uint64_t quot = 0, qbit = 1;
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if (den == 0)
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{
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return 1 / ((unsigned) den);
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/* Intentional divide by zero, without
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* triggering a compiler warning which
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* would abort the build */
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}
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/* Left-justify denominator and count shift */
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while ((int64_t) den >= 0)
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{
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den <<= 1;
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qbit <<= 1;
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}
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while (qbit)
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{
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if (den <= num)
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{
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num -= den;
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quot += qbit;
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}
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den >>= 1;
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qbit >>= 1;
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}
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if (rem_p)
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*rem_p = num;
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return quot;
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}
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#endif
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