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comparison libgfortran/m4/norm2.m4 @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 84e7813d76e9
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68:561a7518be6b 111:04ced10e8804
1 `/* Implementation of the NORM2 intrinsic
2 Copyright (C) 2010-2017 Free Software Foundation, Inc.
3 Contributed by Tobias Burnus <burnus@net-b.de>
4
5 This file is part of the GNU Fortran runtime library (libgfortran).
6
7 Libgfortran is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either
10 version 3 of the License, or (at your option) any later version.
11
12 Libgfortran is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
20
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
25
26 #include "libgfortran.h"'
27
28 include(iparm.m4)dnl
29 include(ifunction.m4)dnl
30 include(`mtype.m4')dnl
31
32 `#if defined (HAVE_'atype_name`) && defined (HAVE_'rtype_name`) && 'hasmathfunc(sqrt) && hasmathfunc(fabs)
33
34 mathfunc_macro
35
36 ARRAY_FUNCTION(0,
37 ` 'rtype_name` scale;
38 result = 0;
39 scale = 1;',
40 ` if (*src != 0)
41 {
42 'rtype_name` absX, val;
43 absX = MATHFUNC(fabs) (*src);
44 if (scale < absX)
45 {
46 val = scale / absX;
47 result = 1 + result * val * val;
48 scale = absX;
49 }
50 else
51 {
52 val = absX / scale;
53 result += val * val;
54 }
55 }',
56 ` result = scale * MATHFUNC(sqrt) (result);')
57
58 #endif