Subversion Repositories openrisc_2011-10-31

/*  This file is part of the program psim.

    Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>

    This program 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.

    This program 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 this program; if not, write to the Free Software

    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

    */

#ifndef _BITS_C_

#define _BITS_C_

#include "basics.h"

INLINE_BITS\

(unsigned64)

LSMASKED64 (unsigned64 word,

            int start,

            int stop)

{

  word &= LSMASK64 (start, stop);

  return word;

}

INLINE_BITS\

(unsigned64)

LSEXTRACTED64 (unsigned64 val,

               int start,

               int stop)

{

  val <<= (64 - 1 - start); /* drop high bits */

  val >>= (64 - 1 - start) + (stop); /* drop low bits */

  return val;

}

INLINE_BITS\

(unsigned32)

MASKED32(unsigned32 word,

         unsigned start,

         unsigned stop)

{

  return (word & MASK32(start, stop));

}

INLINE_BITS\

(unsigned64)

MASKED64(unsigned64 word,

         unsigned start,

         unsigned stop)

{

  return (word & MASK64(start, stop));

}

INLINE_BITS\

(unsigned_word)

MASKED(unsigned_word word,

       unsigned start,

       unsigned stop)

{

  return ((word) & MASK(start, stop));

}

INLINE_BITS\

(unsigned_word)

EXTRACTED(unsigned_word word,

          unsigned start,

          unsigned stop)

{

  ASSERT(start <= stop);

#if (WITH_TARGET_WORD_BITSIZE == 64)

  return _EXTRACTEDn(64, word, start, stop);

#else

  if (stop < 32)

    return 0;

  else

    return ((word >> (63 - stop))

            & MASK(start+(63-stop), 63));

#endif

}

INLINE_BITS\

(unsigned_word)

INSERTED(unsigned_word word,

         unsigned start,

         unsigned stop)

{

  ASSERT(start <= stop);

#if (WITH_TARGET_WORD_BITSIZE == 64)

  return _INSERTEDn(64, word, start, stop);

#else

  if (stop < 32)

    return 0;

  else

    return ((word & MASK(start+(63-stop), 63))

            << (63 - stop));

#endif

}

INLINE_BITS\

(unsigned32)

ROTL32(unsigned32 val,

       long shift)

{

  ASSERT(shift >= 0 && shift <= 32);

  return _ROTLn(32, val, shift);

}

INLINE_BITS\

(unsigned64)

ROTL64(unsigned64 val,

       long shift)

{

  ASSERT(shift >= 0 && shift <= 64);

  return _ROTLn(64, val, shift);

}

#endif /* _BITS_C_ */