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- /* Copyright (C) 2012-2022 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-gcn.h"
- /* 16-bit HI divide and modulo as used in gcn. */
- static UHItype
- udivmodhi4 (UHItype num, UHItype den, word_type modwanted)
- {
- UHItype bit = 1;
- UHItype res = 0;
- while (den < num && bit && !(den & (1L<<15)))
- {
- den <<=1;
- bit <<=1;
- }
- while (bit)
- {
- if (num >= den)
- {
- num -= den;
- res |= bit;
- }
- bit >>=1;
- den >>=1;
- }
- if (modwanted)
- return num;
- return res;
- }
- HItype
- __divhi3 (HItype a, HItype b)
- {
- word_type neg = 0;
- HItype 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;
- }
- HItype
- __modhi3 (HItype a, HItype b)
- {
- word_type neg = 0;
- HItype res;
- if (a < 0)
- {
- a = -a;
- neg = 1;
- }
- if (b < 0)
- b = -b;
- res = udivmodhi4 (a, b, 1);
- if (neg)
- res = -res;
- return res;
- }
- UHItype
- __udivhi3 (UHItype a, UHItype b)
- {
- return udivmodhi4 (a, b, 0);
- }
- UHItype
- __umodhi3 (UHItype a, UHItype b)
- {
- return udivmodhi4 (a, b, 1);
- }
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