1 /* mpf_cmp -- Compare two floats.
3 Copyright 1993, 1994, 1996, 2001 Free Software Foundation, Inc.
5 This file is part of the GNU MP Library.
7 The GNU MP Library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or (at your
10 option) any later version.
12 The GNU MP Library is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15 License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
24 mpf_cmp (mpf_srcptr u, mpf_srcptr v)
27 mp_size_t usize, vsize;
38 /* 1. Are the signs different? */
39 if ((usize ^ vsize) >= 0)
41 /* U and V are both non-negative or both negative. */
52 /* Either U or V is negative, but not both. */
53 return usize >= 0 ? 1 : -1;
56 /* U and V have the same sign and are both non-zero. */
58 usign = usize >= 0 ? 1 : -1;
60 /* 2. Are the exponents different? */
72 #define STRICT_MPF_NORMALIZATION 0
73 #if ! STRICT_MPF_NORMALIZATION
74 /* Ignore zeroes at the low end of U and V. */
89 cmp = mpn_cmp (up + usize - vsize, vp, vsize);
93 else if (vsize > usize)
95 cmp = mpn_cmp (up, vp + vsize - usize, usize);
101 cmp = mpn_cmp (up, vp, usize);
105 return cmp > 0 ? usign : -usign;