6ec01646dc
BMakefiles and other bits will follow. Requested by: Andrey Chernov Made world by: Chuck Robey
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/* mpf_neg -- Negate a float.
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Copyright (C) 1993, 1994, 1995 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 Library General Public License as published by
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the Free Software Foundation; either version 2 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 Library General Public
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License for more details.
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You should have received a copy of the GNU Library General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include "gmp.h"
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#include "gmp-impl.h"
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void
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#if __STDC__
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mpf_neg (mpf_ptr r, mpf_srcptr u)
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#else
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mpf_neg (r, u)
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mpf_ptr r;
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mpf_srcptr u;
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#endif
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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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