102 lines
1.6 KiB
C
102 lines
1.6 KiB
C
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/*
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* This file is part of GNU CC.
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*
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* GNU CC is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2, or (at your
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* option) any later version.
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*
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* GNU CC is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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
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* License along with GNU CC; see the file COPYING. If not, write
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* to the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "math.h"
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USItype udivmodsi4 (USItype num, USItype den, word_type modwanted)
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{
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USItype bit = 1;
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USItype res = 0;
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while (den < num && bit && !(den & (1L << 31))) {
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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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if (num >= den) {
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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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SItype __divsi3 (SItype a, SItype b)
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{
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word_type neg = 0;
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SItype res;
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if (a < 0) {
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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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b = -b;
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neg = !neg;
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}
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res = udivmodsi4 (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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SItype __modsi3 (SItype a, SItype b)
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{
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word_type neg = 0;
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SItype res;
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if (a < 0) {
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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 = udivmodsi4 (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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SItype __udivsi3 (SItype a, SItype b)
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{
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return udivmodsi4 (a, b, 0);
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}
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SItype __umodsi3 (SItype a, SItype b)
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{
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return udivmodsi4 (a, b, 1);
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}
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