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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgcc/] [config/] [cr16/] [divmodhi3.c] - Rev 818
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/* Libgcc Target specific implementation - Emulating div and mod. Copyright (C) 2012 Free Software Foundation, Inc. Contributed by KPIT Cummins Infosystems Limited. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ /* Emulate the division and modulus operation. */ unsigned short udivmodhi4 (unsigned short num, unsigned short den, short modwanted) { unsigned short bit = 1; unsigned short res = 0; while (den < num && bit && !(den & (1 << 15))) { den <<= 1; bit <<= 1; } while (bit) { if (num >= den) { num -= den; res |= bit; } bit >>= 1; den >>= 1; } if (modwanted) return num; return res; } short __divhi3 (short a, short b) { short neg = 0; short res; if (a < 0) { a = -a; neg = !neg; } if (b < 0) { b = -b; neg = !neg; } res = udivmodhi4 (a, b, 0); if (neg) res = -res; return res; } short __modhi3 (short a, short b) { short neg = 0; short res; if (a < 0) { a = -a; neg = 1; } if (b < 0) b = -b; res = udivmodhi4 (a, b, 1); if (neg) res = -res; return res; } short __udivhi3 (short a, short b) { return udivmodhi4 (a, b, 0); } short __umodhi3 (short a, short b) { return udivmodhi4 (a, b, 1); }
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