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/* Implementation of the MVBITS intrinsic
Copyright (C) 2004-2024 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 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/>. */
/* 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 int *, const int *, TYPE *,
const int *);
export_proto(SUB_NAME);
void
SUB_NAME (const TYPE *from, const int *frompos, const int *len, TYPE *to,
const int *topos)
{
TYPE oldbits, newbits, lenmask;
lenmask = (*len == sizeof (TYPE)*8) ? ~(TYPE)0 : ((TYPE)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
#if defined (HAVE_GFC_INTEGER_16)
# define TYPE GFC_INTEGER_16
# define UTYPE GFC_UINTEGER_16
# define SUB_NAME mvbits_i16
# include "mvbits.c"
# undef SUB_NAME
# undef TYPE
# undef UTYPE
#endif
#endif
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