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Diffstat (limited to 'Build/source/libs/mpfr/mpfr-3.1.2/src/swap.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-3.1.2/src/swap.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-3.1.2/src/swap.c b/Build/source/libs/mpfr/mpfr-3.1.2/src/swap.c new file mode 100644 index 00000000000..8ab213a75fc --- /dev/null +++ b/Build/source/libs/mpfr/mpfr-3.1.2/src/swap.c @@ -0,0 +1,54 @@ +/* mpfr_swap (U, V) -- Swap U and V. + +Copyright 2000, 2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. +Contributed by the AriC and Caramel 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 3 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.LESSER. If not, see +http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., +51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#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; + mpfr_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; +} |