fe2ae685a1
2005-08-17 Kelley Cook <kcook@gcc.gnu.org> * All files: Update FSF address. From-SVN: r103194
92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/* Implementation of the MVBITS intrinsic
|
|
Copyright (C) 2004 Free Software Foundation, Inc.
|
|
Contributed by Tobias Schlüter
|
|
|
|
This file is part of the GNU Fortran 95 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 2 of the License, or (at your option) any later version.
|
|
|
|
In addition to the permissions in the GNU General Public License, the
|
|
Free Software Foundation gives you unlimited permission to link the
|
|
compiled version of this file into combinations with other programs,
|
|
and to distribute those combinations without any restriction coming
|
|
from the use of this file. (The General Public License restrictions
|
|
do apply in other respects; for example, they cover modification of
|
|
the file, and distribution when not linked into a combine
|
|
executable.)
|
|
|
|
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.
|
|
|
|
You should have received a copy of the GNU General Public
|
|
License along with libgfortran; see the file COPYING. If not,
|
|
write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
/* TODO: This should be replaced by a compiler builtin. */
|
|
|
|
#ifndef SUB_NAME
|
|
#include <libgfortran.h>
|
|
#endif
|
|
|
|
#ifdef SUB_NAME
|
|
/* MVBITS copies LEN bits starting at bit position FROMPOS from FROM
|
|
into TO, starting at bit position TOPOS. */
|
|
|
|
extern void SUB_NAME (const TYPE *, const GFC_INTEGER_4 *,
|
|
const GFC_INTEGER_4 *, TYPE *, const GFC_INTEGER_4 *);
|
|
export_proto(SUB_NAME);
|
|
|
|
void
|
|
SUB_NAME (const TYPE *from, const GFC_INTEGER_4 *frompos,
|
|
const GFC_INTEGER_4 *len, TYPE *to, const GFC_INTEGER_4 *topos)
|
|
{
|
|
TYPE oldbits, newbits, lenmask;
|
|
|
|
lenmask = (*len == sizeof (TYPE)*8) ? ~(TYPE)0 : (1 << *len) - 1;
|
|
newbits = (((UTYPE)(*from) >> *frompos) & lenmask) << *topos;
|
|
oldbits = *to & (~(lenmask << *topos));
|
|
|
|
*to = newbits | oldbits;
|
|
}
|
|
#endif
|
|
|
|
#ifndef SUB_NAME
|
|
# define TYPE GFC_INTEGER_1
|
|
# define UTYPE GFC_UINTEGER_1
|
|
# define SUB_NAME mvbits_i1
|
|
# include "mvbits.c"
|
|
# undef SUB_NAME
|
|
# undef TYPE
|
|
# undef UTYPE
|
|
|
|
# define TYPE GFC_INTEGER_2
|
|
# define UTYPE GFC_UINTEGER_2
|
|
# define SUB_NAME mvbits_i2
|
|
# include "mvbits.c"
|
|
# undef SUB_NAME
|
|
# undef TYPE
|
|
# undef UTYPE
|
|
|
|
# define TYPE GFC_INTEGER_4
|
|
# define UTYPE GFC_UINTEGER_4
|
|
# define SUB_NAME mvbits_i4
|
|
# include "mvbits.c"
|
|
# undef SUB_NAME
|
|
# undef TYPE
|
|
# undef UTYPE
|
|
|
|
# define TYPE GFC_INTEGER_8
|
|
# define UTYPE GFC_UINTEGER_8
|
|
# define SUB_NAME mvbits_i8
|
|
# include "mvbits.c"
|
|
# undef SUB_NAME
|
|
# undef TYPE
|
|
# undef UTYPE
|
|
#endif
|