| /* Libgcc Target specific implementation - Emulating div and mod. |

| Copyright (C) 2012-2021 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); |

| } |