1 /* mpf_cmp -- Compare two floats.
3 Copyright (C) 1993, 1994, 1996 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 Library General Public License as published by
9 the Free Software Foundation; either version 2 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 Library General Public
15 License for more details.
17 You should have received a copy of the GNU Library General Public License
18 along with the GNU MP Library; see the file COPYING.LIB. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
20 MA 02111-1307, USA. */
27 mpf_cmp (mpf_srcptr u, mpf_srcptr v)
35 mp_size_t usize, vsize;
46 /* 1. Are the signs different? */
47 if ((usize ^ vsize) >= 0)
49 /* U and V are both non-negative or both negative. */
60 /* Either U or V is negative, but not both. */
61 return usize >= 0 ? 1 : -1;
64 /* U and V have the same sign and are both non-zero. */
66 usign = usize >= 0 ? 1 : -1;
68 /* 2. Are the exponents different? */
80 #define STRICT_MPF_NORMALIZATION 0
81 #if ! STRICT_MPF_NORMALIZATION
82 /* Ignore zeroes at the low end of U and V. */
97 cmp = mpn_cmp (up + usize - vsize, vp, vsize);
101 else if (vsize > usize)
103 cmp = mpn_cmp (up, vp + vsize - usize, usize);
109 cmp = mpn_cmp (up, vp, usize);
113 return cmp > 0 ? usign : -usign;