1 /* mpz_mod_ui(rem, dividend, divisor_limb)
2 -- Set REM to DIVDEND mod DIVISOR_LIMB.
4 Copyright (C) 1991, 1992 Free Software Foundation, Inc.
6 This file is part of the GNU MP Library.
8 The GNU MP Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 The GNU MP Library is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with the GNU MP Library; see the file COPYING. If not, write to
20 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
28 mpz_mod_ui (MP_INT *rem, const MP_INT *dividend,
29 unsigned long int divisor_limb)
31 mpz_mod_ui (rem, dividend, divisor_limb)
33 const MP_INT *dividend;
34 unsigned long int divisor_limb;
37 mp_size sign_dividend;
38 mp_size dividend_size;
39 mp_limb remainder_limb;
41 sign_dividend = dividend->size;
42 dividend_size = ABS (dividend->size);
44 if (dividend_size == 0)
50 /* No need for temporary allocation and copying if QUOT == DIVIDEND as
51 the divisor is just one limb, and thus no intermediate remainders
54 remainder_limb = mpn_mod_1 (dividend->d, dividend_size, divisor_limb);
56 if (remainder_limb == 0)
60 /* Store the single-limb remainder. We don't check if there's space
61 for just one limb, since no function ever makes zero space. */
62 rem->size = sign_dividend >= 0 ? 1 : -1;
63 rem->d[0] = remainder_limb;