62 lines
1.8 KiB
Plaintext
62 lines
1.8 KiB
Plaintext
`/* Implementation of the NORM2 intrinsic
|
|
Copyright 2010 Free Software Foundation, Inc.
|
|
Contributed by Tobias Burnus <burnus@net-b.de>
|
|
|
|
This file is part of the GNU Fortran runtime library (libgfortran).
|
|
|
|
Libgfortran is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 3 of the License, or (at your option) any later version.
|
|
|
|
Libgfortran 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 General Public License for more details.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include "libgfortran.h"
|
|
#include <stdlib.h>
|
|
#include <math.h>
|
|
#include <assert.h>'
|
|
|
|
include(iparm.m4)dnl
|
|
include(ifunction.m4)dnl
|
|
include(`mtype.m4')dnl
|
|
|
|
`#if defined (HAVE_'atype_name`) && defined (HAVE_'rtype_name`) && 'hasmathfunc(sqrt) && hasmathfunc(fabs)
|
|
|
|
mathfunc_macro
|
|
|
|
ARRAY_FUNCTION(0,
|
|
` 'rtype_name` scale;
|
|
result = 0;
|
|
scale = 1;',
|
|
` if (*src != 0)
|
|
{
|
|
'rtype_name` absX, val;
|
|
absX = MATHFUNC(fabs) (*src);
|
|
if (scale < absX)
|
|
{
|
|
val = scale / absX;
|
|
result = 1 + result * val * val;
|
|
scale = absX;
|
|
}
|
|
else
|
|
{
|
|
val = absX / scale;
|
|
result += val * val;
|
|
}
|
|
}',
|
|
` result = scale * MATHFUNC(sqrt) (result);')
|
|
|
|
#endif
|