/*  This file is part of the program psim.

    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
    Copyright (C) 1997, Free Software Foundation, Inc.

    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 N
#error "N must be #defined"
#endif

/* NOTE: See end of file for #undef */
#define unsignedN XCONCAT2(unsigned,N)
#define signedN XCONCAT2(signed,N)
#define MASKEDn XCONCAT2(MASKED,N)
#define MASKn XCONCAT2(MASK,N)
#define LSMASKEDn XCONCAT2(LSMASKED,N)
#define EXTRACTEDn XCONCAT2(EXTRACTED,N)
#define INSERTEDn XCONCAT2(INSERTED,N)
#define ROTn XCONCAT2(ROT,N)
#define ROTLn XCONCAT2(ROTL,N)
#define ROTRn XCONCAT2(ROTR,N)
#define SEXTn XCONCAT2(SEXT,N)


INLINE_SIM_BITS\
(unsignedN)
MASKEDn(unsignedN word,
	unsigned start,
	unsigned stop)
{
  return (word & MASKn(start, stop));
}


INLINE_SIM_BITS\
(unsignedN)
LSMASKEDn(unsignedN word,
	  unsigned nr_bits)
{
  return (word & MASKn(N - nr_bits, N - 1));
}


INLINE_SIM_BITS\
(unsignedN)
EXTRACTEDn(unsignedN val,
	   unsigned start,
	   unsigned stop)
{
  return LSMASKEDn((((unsignedN)(val)) >> (N - stop - 1)),
		   stop - start + 1);
}


INLINE_SIM_BITS\
(unsignedN)
INSERTEDn(unsignedN val,
	  unsigned start,
	  unsigned stop)
{
  return (((unsignedN)(val)
	   << _MAKE_SHIFT(N, stop))
	  & MASKn(start, stop));
}


INLINE_SIM_BITS\
(unsignedN)
ROTn(unsignedN val,
     int shift)
{
  unsignedN result;
  if (shift > 0)
    return ROTRn(val, shift);
  else if (shift < 0)
    return ROTLn(val, -shift);
  else
    return val;
}


INLINE_SIM_BITS\
(unsignedN)
ROTLn(unsignedN val,
      unsigned shift)
{
  unsignedN result;
  ASSERT(shift <= N);
  result = (((val) << (shift)) | ((val) >> ((N)-(shift))));
  return result;
}


INLINE_SIM_BITS\
(unsignedN)
ROTRn(unsignedN val,
      unsigned shift)
{
  unsignedN result;
  ASSERT(shift <= N);
  result = (((val) >> (shift)) | ((val) << ((N)-(shift))));
  return result;
}


INLINE_SIM_BITS\
(unsignedN)
SEXTn(signedN val,
	     unsigned sign_bit)
{
  /* make the sign-bit most significant and then smear it back into
     position */
  ASSERT(sign_bit < N);
  return (val << sign_bit) >> sign_bit;
}


/* NOTE: See start of file for #define */
#undef SEXTn
#undef ROTLn
#undef ROTRn
#undef ROTn
#undef INSERTEDn
#undef EXTRACTEDn
#undef LSMASKEDn
#undef MASKn
#undef MASKEDn
#undef signedN
#undef unsignedN