| /* Copyright (C) 2012-2021 Free Software Foundation, Inc. |

| Contributed by Altera and Mentor Graphics, Inc. |

| |

| This file 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. |

| |

| This file 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/>. */ |

| |

| #include "lib2-nios2.h" |

| |

| /* 32-bit SI divide and modulo as used in Nios II. */ |

| |

| static USItype |

| udivmodsi4 (USItype num, USItype den, word_type modwanted) |

| { |

| USItype bit = 1; |

| USItype res = 0; |

| |

| while (den < num && bit && !(den & (1L<<31))) |

| { |

| den <<=1; |

| bit <<=1; |

| } |

| while (bit) |

| { |

| if (num >= den) |

| { |

| num -= den; |

| res |= bit; |

| } |

| bit >>=1; |

| den >>=1; |

| } |

| if (modwanted) |

| return num; |

| return res; |

| } |

| |

| |

| SItype |

| __divsi3 (SItype a, SItype b) |

| { |

| word_type neg = 0; |

| SItype res; |

| |

| if (a < 0) |

| { |

| a = -a; |

| neg = !neg; |

| } |

| |

| if (b < 0) |

| { |

| b = -b; |

| neg = !neg; |

| } |

| |

| res = udivmodsi4 (a, b, 0); |

| |

| if (neg) |

| res = -res; |

| |

| return res; |

| } |

| |

| |

| SItype |

| __modsi3 (SItype a, SItype b) |

| { |

| word_type neg = 0; |

| SItype res; |

| |

| if (a < 0) |

| { |

| a = -a; |

| neg = 1; |

| } |

| |

| if (b < 0) |

| b = -b; |

| |

| res = udivmodsi4 (a, b, 1); |

| |

| if (neg) |

| res = -res; |

| |

| return res; |

| } |

| |

| |

| SItype |

| __udivsi3 (SItype a, SItype b) |

| { |

| return udivmodsi4 (a, b, 0); |

| } |

| |

| |

| SItype |

| __umodsi3 (SItype a, SItype b) |

| { |

| return udivmodsi4 (a, b, 1); |

| } |

| |