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/fdiv_qr.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 gmp-6.3.0/mpz/fdiv_qr.c (limited to 'gmp-6.3.0/mpz/fdiv_qr.c') diff --git a/gmp-6.3.0/mpz/fdiv_qr.c b/gmp-6.3.0/mpz/fdiv_qr.c new file mode 100644 index 0000000..a0a6166 --- /dev/null +++ b/gmp-6.3.0/mpz/fdiv_qr.c @@ -0,0 +1,64 @@ +/* mpz_fdiv_qr -- Division rounding the quotient towards -infinity. + The remainder gets the same sign as the denominator. + +Copyright 1994-1996, 2000, 2001, 2005, 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_fdiv_qr (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, mpz_srcptr divisor) +{ + mp_size_t divisor_size = SIZ (divisor); + mp_size_t xsize; + mpz_t temp_divisor; /* N.B.: lives until function returns! */ + TMP_DECL; + + TMP_MARK; + + /* We need the original value of the divisor after the quotient and + remainder have been preliminary calculated. We have to copy it to + temporary space if it's the same variable as either QUOT or REM. */ + if (quot == divisor || rem == divisor) + { + MPZ_TMP_INIT (temp_divisor, ABS (divisor_size)); + mpz_set (temp_divisor, divisor); + divisor = temp_divisor; + } + + xsize = SIZ (dividend) ^ divisor_size;; + mpz_tdiv_qr (quot, rem, dividend, divisor); + + if (xsize < 0 && SIZ (rem) != 0) + { + mpz_sub_ui (quot, quot, 1L); + mpz_add (rem, rem, divisor); + } + + TMP_FREE; +} -- cgit v1.2.3