| /* mpfr_swap (U, V) -- Swap U and V. |
| |
| Copyright 2000, 2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
| Contributed by the Arenaire and Cacao projects, INRIA. |
| |
| This file is part of the GNU MPFR Library. |
| |
| The GNU MPFR Library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or (at your |
| option) any later version. |
| |
| The GNU MPFR 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 Lesser General Public |
| License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with the GNU MPFR Library; see the file COPYING.LIB. If not, write to |
| the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #include <string.h> |
| |
| #include "mpfr-impl.h" |
| |
| /* Using memcpy is a few slower than swapping by hand. */ |
| |
| void |
| mpfr_swap (mpfr_ptr u, mpfr_ptr v) |
| { |
| mpfr_prec_t p1, p2; |
| mpfr_sign_t s1, s2; |
| mp_exp_t e1, e2; |
| mp_limb_t *m1, *m2; |
| |
| p1 = MPFR_PREC(u); |
| p2 = MPFR_PREC(v); |
| MPFR_PREC(v) = p1; |
| MPFR_PREC(u) = p2; |
| |
| s1 = MPFR_SIGN(u); |
| s2 = MPFR_SIGN(v); |
| MPFR_SIGN(v) = s1; |
| MPFR_SIGN(u) = s2; |
| |
| e1 = MPFR_EXP(u); |
| e2 = MPFR_EXP(v); |
| MPFR_EXP(v) = e1; |
| MPFR_EXP(u) = e2; |
| |
| m1 = MPFR_MANT(u); |
| m2 = MPFR_MANT(v); |
| MPFR_MANT(v) = m1; |
| MPFR_MANT(u) = m2; |
| } |