From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001 From: Duncan Wilkie Date: Sat, 18 Nov 2023 06:11:09 -0600 Subject: Initial commit. --- gmp-6.3.0/mpz/mod.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 gmp-6.3.0/mpz/mod.c (limited to 'gmp-6.3.0/mpz/mod.c') diff --git a/gmp-6.3.0/mpz/mod.c b/gmp-6.3.0/mpz/mod.c new file mode 100644 index 0000000..ab5cdb1 --- /dev/null +++ b/gmp-6.3.0/mpz/mod.c @@ -0,0 +1,67 @@ +/* mpz_mod -- The mathematical mod function. + +Copyright 1991, 1993-1996, 2001, 2002, 2005, 2010, 2012 Free Software +Foundation, Inc. + +This file is part of the GNU MP Library. + +The GNU MP Library is free software; you can redistribute it and/or modify +it under the terms of either: + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at your + option) any later version. + +or + + * the GNU General Public License as published by the Free Software + Foundation; either version 2 of the License, or (at your option) any + later version. + +or both in parallel, as here. + +The GNU MP Library 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. + +You should have received copies of the GNU General Public License and the +GNU Lesser General Public License along with the GNU MP Library. If not, +see https://www.gnu.org/licenses/. */ + +#include "gmp-impl.h" + +void +mpz_mod (mpz_ptr rem, mpz_srcptr dividend, mpz_srcptr divisor) +{ + mp_size_t rn, bn; + mpz_t temp_divisor; + TMP_DECL; + + TMP_MARK; + + bn = ABSIZ(divisor); + + /* We need the original value of the divisor after the remainder has been + preliminary calculated. We have to copy it to temporary space if it's + the same variable as REM. */ + if (rem == divisor) + { + PTR(temp_divisor) = TMP_ALLOC_LIMBS (bn); + MPN_COPY (PTR(temp_divisor), PTR(divisor), bn); + } + else + { + PTR(temp_divisor) = PTR(divisor); + } + SIZ(temp_divisor) = bn; + divisor = temp_divisor; + + mpz_tdiv_r (rem, dividend, divisor); + + rn = SIZ (rem); + if (rn < 0) + mpz_add (rem, rem, divisor); + + TMP_FREE; +} -- cgit v1.2.3