118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
/* libgcc routines for RL78
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Copyright (C) 2005-2013 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(udivmod,NAME_MODE,4) (UINT_TYPE, UINT_TYPE, word_type);
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SINT_TYPE C3(__div,NAME_MODE,3) (SINT_TYPE, SINT_TYPE);
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SINT_TYPE C3(__mod,NAME_MODE,3) (SINT_TYPE, SINT_TYPE);
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UINT_TYPE C3(__udiv,NAME_MODE,3) (UINT_TYPE, UINT_TYPE);
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UINT_TYPE C3(__umod,NAME_MODE,3) (UINT_TYPE, UINT_TYPE);
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UINT_TYPE
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C3(udivmod,NAME_MODE,4) (UINT_TYPE num, UINT_TYPE den, word_type modwanted)
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{
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UINT_TYPE bit = 1;
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UINT_TYPE res = 0;
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while (den < num && bit && !(den & (1L << BITS_MINUS_1)))
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{
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den <<= 1;
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bit <<= 1;
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}
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while (bit)
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{
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if (num >= den)
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{
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num -= den;
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res |= bit;
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}
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bit >>= 1;
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den >>= 1;
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}
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if (modwanted)
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return num;
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return res;
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}
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SINT_TYPE
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C3(__div,NAME_MODE,3) (SINT_TYPE a, SINT_TYPE b)
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{
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word_type neg = 0;
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SINT_TYPE res;
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if (a < 0)
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{
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a = -a;
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neg = !neg;
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}
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if (b < 0)
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{
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b = -b;
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neg = !neg;
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}
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res = C3(udivmod,NAME_MODE,4) (a, b, 0);
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if (neg)
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res = -res;
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return res;
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}
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SINT_TYPE
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C3(__mod,NAME_MODE,3) (SINT_TYPE a, SINT_TYPE b)
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{
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word_type neg = 0;
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SINT_TYPE res;
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if (a < 0)
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{
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a = -a;
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neg = 1;
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}
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if (b < 0)
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b = -b;
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res = C3(udivmod,NAME_MODE,4) (a, b, 1);
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if (neg)
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res = -res;
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return res;
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}
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UINT_TYPE
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C3(__udiv,NAME_MODE,3) (UINT_TYPE a, UINT_TYPE b)
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{
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return C3(udivmod,NAME_MODE,4) (a, b, 0);
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}
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UINT_TYPE
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C3(__umod,NAME_MODE,3) (UINT_TYPE a, UINT_TYPE b)
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{
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return C3(udivmod,NAME_MODE,4) (a, b, 1);
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}
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