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6de9cd9a DN |
1 | /* Implementation of the NEAREST intrinsic |
2 | Copyright 2003 Free Software Foundation, Inc. | |
3 | Contributed by Richard Henderson <rth@redhat.com>. | |
4 | ||
57dea9f6 | 5 | This file is part of the GNU Fortran 95 runtime library (libgfortran). |
6de9cd9a | 6 | |
57dea9f6 TM |
7 | Libgfortran is free software; you can redistribute it and/or |
8 | modify it under the terms of the GNU General Public | |
6de9cd9a | 9 | License as published by the Free Software Foundation; either |
57dea9f6 | 10 | version 2 of the License, or (at your option) any later version. |
6de9cd9a | 11 | |
57dea9f6 TM |
12 | In addition to the permissions in the GNU General Public License, the |
13 | Free Software Foundation gives you unlimited permission to link the | |
14 | compiled version of this file into combinations with other programs, | |
15 | and to distribute those combinations without any restriction coming | |
16 | from the use of this file. (The General Public License restrictions | |
17 | do apply in other respects; for example, they cover modification of | |
18 | the file, and distribution when not linked into a combine | |
19 | executable.) | |
20 | ||
21 | Libgfortran is distributed in the hope that it will be useful, | |
6de9cd9a DN |
22 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
57dea9f6 | 24 | GNU General Public License for more details. |
6de9cd9a | 25 | |
57dea9f6 TM |
26 | You should have received a copy of the GNU General Public |
27 | License along with libgfortran; see the file COPYING. If not, | |
fe2ae685 KC |
28 | write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
29 | Boston, MA 02110-1301, USA. */ | |
644cb69f FXC |
30 | |
31 | #include "config.h" | |
6de9cd9a DN |
32 | #include <math.h> |
33 | #include <float.h> | |
34 | #include "libgfortran.h" | |
35 | ||
36 | ||
644cb69f FXC |
37 | #if defined (HAVE_GFC_REAL_4) && defined (HAVE_COPYSIGNF) && defined (HAVE_NEXTAFTERF) |
38 | ||
7d7b8bfe RH |
39 | extern GFC_REAL_4 nearest_r4 (GFC_REAL_4 s, GFC_REAL_4 dir); |
40 | export_proto(nearest_r4); | |
41 | ||
6de9cd9a | 42 | GFC_REAL_4 |
7d7b8bfe | 43 | nearest_r4 (GFC_REAL_4 s, GFC_REAL_4 dir) |
6de9cd9a DN |
44 | { |
45 | dir = copysignf (__builtin_inff (), dir); | |
46 | if (FLT_EVAL_METHOD != 0) | |
47 | { | |
48 | /* ??? Work around glibc bug on x86. */ | |
49 | volatile GFC_REAL_4 r = nextafterf (s, dir); | |
50 | return r; | |
51 | } | |
52 | else | |
53 | return nextafterf (s, dir); | |
54 | } | |
644cb69f FXC |
55 | |
56 | #endif |