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57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
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/* mpfr_swap (U, V) -- Swap U and V.
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Copyright 2000, 2001, 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
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Contributed by the Arenaire and Cacao projects, INRIA.
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This file is part of the MPFR Library.
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The MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The MPFR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the MPFR Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <string.h>
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#include "mpfr-impl.h"
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/* Using memcpy is a few slower than swapping by hand. */
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void
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mpfr_swap (mpfr_ptr u, mpfr_ptr v)
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{
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mpfr_prec_t p1, p2;
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mpfr_sign_t s1, s2;
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mp_exp_t e1, e2;
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mp_limb_t *m1, *m2;
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p1 = MPFR_PREC(u);
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p2 = MPFR_PREC(v);
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MPFR_PREC(v) = p1;
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MPFR_PREC(u) = p2;
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s1 = MPFR_SIGN(u);
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s2 = MPFR_SIGN(v);
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MPFR_SIGN(v) = s1;
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MPFR_SIGN(u) = s2;
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e1 = MPFR_EXP(u);
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e2 = MPFR_EXP(v);
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MPFR_EXP(v) = e1;
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MPFR_EXP(u) = e2;
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m1 = MPFR_MANT(u);
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m2 = MPFR_MANT(v);
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MPFR_MANT(v) = m1;
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MPFR_MANT(u) = m2;
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}
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