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/fib2_ui.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 gmp-6.3.0/mpz/fib2_ui.c (limited to 'gmp-6.3.0/mpz/fib2_ui.c') diff --git a/gmp-6.3.0/mpz/fib2_ui.c b/gmp-6.3.0/mpz/fib2_ui.c new file mode 100644 index 0000000..ea26227 --- /dev/null +++ b/gmp-6.3.0/mpz/fib2_ui.c @@ -0,0 +1,58 @@ +/* mpz_fib2_ui -- calculate Fibonacci numbers. + +Copyright 2001, 2012, 2014, 2015 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 +#include "gmp-impl.h" + + +void +mpz_fib2_ui (mpz_ptr fn, mpz_ptr fnsub1, unsigned long n) +{ + mp_ptr fp, f1p; + mp_size_t size; + + if (n <= FIB_TABLE_LIMIT) + { + MPZ_NEWALLOC (fn, 1)[0] = FIB_TABLE (n); + SIZ(fn) = (n != 0); /* F[0]==0, others are !=0 */ + MPZ_NEWALLOC (fnsub1, 1)[0] = FIB_TABLE ((int) n - 1); + SIZ(fnsub1) = (n != 1); /* F[1-1]==0, others are !=0 */ + return; + } + + size = MPN_FIB2_SIZE (n); + fp = MPZ_NEWALLOC (fn, size); + f1p = MPZ_NEWALLOC (fnsub1, size); + + size = mpn_fib2_ui (fp, f1p, n); + + SIZ(fn) = size; + SIZ(fnsub1) = size - (f1p[size-1] == 0); +} -- cgit v1.2.3