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b58ddff026
* merged mpfr 3.0.0 and gmp 5.0.1 in buildtools trunk git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@37378 a95241bf-73f2-0310-859d-f6bbb57e9c96
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/* mpf_neg -- Negate a float.
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Copyright 1993, 1994, 1995, 2001 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP 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 3 of the License, or (at your
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option) any later version.
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The GNU MP 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 GNU MP Library. If not, see http://www.gnu.org/licenses/. */
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#include "gmp.h"
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#include "gmp-impl.h"
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void
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mpf_neg (mpf_ptr r, mpf_srcptr u)
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{
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mp_size_t size;
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size = -u->_mp_size;
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if (r != u)
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{
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mp_size_t prec;
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mp_size_t asize;
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mp_ptr rp, up;
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prec = r->_mp_prec + 1; /* lie not to lose precision in assignment */
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asize = ABS (size);
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rp = r->_mp_d;
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up = u->_mp_d;
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if (asize > prec)
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{
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up += asize - prec;
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asize = prec;
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}
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MPN_COPY (rp, up, asize);
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r->_mp_exp = u->_mp_exp;
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size = size >= 0 ? asize : -asize;
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}
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r->_mp_size = size;
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}
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