53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/* mpf_reldiff -- Generate the relative difference of two floats.
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Copyright (C) 1996 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_reldiff (mpf_t rdiff, mpf_srcptr x, mpf_srcptr y)
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#else
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mpf_reldiff (rdiff, x, y)
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mpf_t rdiff;
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mpf_srcptr x;
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mpf_srcptr y;
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#endif
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{
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if (mpf_cmp_ui (x, 0) == 0)
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{
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mpf_set_ui (rdiff, (unsigned long int) (mpf_sgn (y) != 0));
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}
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else
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{
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mpf_t d;
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mp_limb_t tmp_limb[2];
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d->_mp_prec = 1;
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d->_mp_d = tmp_limb;
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mpf_sub (d, x, y);
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mpf_abs (d, d);
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mpf_div (rdiff, d, x);
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}
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}
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