/* Implement POWERSET runtime actions for CHILL.
   Copyright (C) 1992,1993 Free Software Foundation, Inc.
   Author: Wilfried Moser, et al

This file is part of GNU CC.

GNU CC 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, or (at your option)
any later version.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#define __CHILL_LIB__

#include "config.h"
#include <stdio.h>
#include "powerset.h"

/*
 * function __notpowerset
 *
 * parameters:
 *	out		output powerset
 *	left		input powerset
 *	bitlength	length of powerset in bits
 *
 * returns:
 *	void
 *
 * exceptions:
 *  none
 *
 * abstract:
 *
 */

void
__notpowerset (out, left, bitlength)
     SET_WORD      *out;
     SET_WORD      *left;
     unsigned long  bitlength;
{
  if (bitlength <= SET_CHAR_SIZE)
    {
      *((SET_CHAR *)out) = ~ (*((SET_CHAR *)left));
#if 0
      SET_CHAR tmp;
      tmp = *((SET_CHAR *)left);
      tmp = ~ tmp;
      *((SET_CHAR *)out) = tmp;

      MASK_UNUSED_CHAR_BITS((SET_CHAR *)out, bitlength);
      *((SET_CHAR *)out) = ~ *((SET_CHAR *)left);
      MASK_UNUSED_CHAR_BITS((SET_CHAR *)out, bitlength);
      *((SET_CHAR *)out) = (~(0)) ^  (*((SET_CHAR *)left));
      MASK_UNUSED_CHAR_BITS((SET_CHAR *)out, bitlength);
#endif
    }
  else if (bitlength <= SET_SHORT_SIZE)
    {
      *((SET_SHORT *)out) = ~  (*((SET_SHORT *)left));
      MASK_UNUSED_SHORT_BITS((SET_SHORT *)out, bitlength);
    }
  else
    {
      unsigned long len = BITS_TO_WORDS(bitlength);
      register unsigned long i;
    
      for (i = 0; i < len; i++)
	out[i] = ~ left[i];
      MASK_UNUSED_WORD_BITS((out + len - 1), bitlength % SET_WORD_SIZE);
    }
}
