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Diffstat (limited to 'contrib/libgmp/mpf/reldiff.c')
-rw-r--r-- | contrib/libgmp/mpf/reldiff.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/contrib/libgmp/mpf/reldiff.c b/contrib/libgmp/mpf/reldiff.c new file mode 100644 index 000000000000..c8464660753c --- /dev/null +++ b/contrib/libgmp/mpf/reldiff.c @@ -0,0 +1,52 @@ +/* mpf_reldiff -- Generate the relative difference of two floats. + +Copyright (C) 1996 Free Software Foundation, Inc. + +This file is part of the GNU MP Library. + +The GNU MP Library is free software; you can redistribute it and/or modify +it under the terms of the GNU Library General Public License as published by +the Free Software Foundation; either version 2 of the License, or (at your +option) any later version. + +The GNU MP 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 Library General Public +License for more details. + +You should have received a copy of the GNU Library General Public License +along with the GNU MP Library; see the file COPYING.LIB. If not, write to +the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +MA 02111-1307, USA. */ + +#include "gmp.h" +#include "gmp-impl.h" + +void +#if __STDC__ +mpf_reldiff (mpf_t rdiff, mpf_srcptr x, mpf_srcptr y) +#else +mpf_reldiff (rdiff, x, y) + mpf_t rdiff; + mpf_srcptr x; + mpf_srcptr y; +#endif +{ + if (mpf_cmp_ui (x, 0) == 0) + { + mpf_set_ui (rdiff, (unsigned long int) (mpf_sgn (y) != 0)); + } + else + { + mpf_t d; + mp_limb_t tmp_limb[2]; + + d->_mp_prec = 1; + d->_mp_d = tmp_limb; + + mpf_sub (d, x, y); + mpf_abs (d, d); + mpf_div (rdiff, d, x); + } +} + |