1 /* mpz_tdiv_r_ui(rem, dividend, divisor_limb)
2 -- Set REM to DIVDEND mod DIVISOR_LIMB.
4 Copyright 1991, 1993, 1994, 1996, 1998, 2001, 2002, 2004, 2005 Free Software
7 This file is part of the GNU MP Library.
9 The GNU MP Library is free software; you can redistribute it and/or modify
10 it under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or (at your
12 option) any later version.
14 The GNU MP Library is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17 License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
26 mpz_tdiv_r_ui (mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
44 #if BITS_PER_ULONG > GMP_NUMB_BITS /* avoid warnings about shift amount */
45 if (divisor > GMP_NUMB_MAX)
52 if (nn == 1) /* tdiv_qr requirements; tested above for 0 */
55 SIZ(rem) = ns >= 0 ? 1 : -1;
64 dp[0] = divisor & GMP_NUMB_MASK;
65 dp[1] = divisor >> GMP_NUMB_BITS;
66 qp = TMP_ALLOC_LIMBS (nn - 2 + 1);
67 mpn_tdiv_qr (qp, rp, (mp_size_t) 0, np, nn, dp, (mp_size_t) 2);
69 rl = rp[0] + (rp[1] << GMP_NUMB_BITS);
70 rn = 2 - (rp[1] == 0); rn -= (rp[rn - 1] == 0);
71 SIZ(rem) = ns >= 0 ? rn : -rn;
76 rl = mpn_mod_1 (np, nn, (mp_limb_t) divisor);
81 /* Store the single-limb remainder. We don't check if there's space
82 for just one limb, since no function ever makes zero space. */
83 SIZ(rem) = ns >= 0 ? 1 : -1;