1 /* Implement POWERSET runtime actions for CHILL.
2 Copyright (C) 1992,1993 Free Software Foundation, Inc.
3 Author: Wilfried Moser, et al
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
27 * function __andpowerset
30 * out return from __andpowerset
32 * right right powerset
33 * bitlength length of powerset in bits
47 __andpowerset (out
, left
, right
, bitlength
)
51 unsigned long bitlength
;
53 if (bitlength
<= SET_CHAR_SIZE
)
55 *((SET_CHAR
*)out
) = *((SET_CHAR
*)left
) &
57 MASK_UNUSED_CHAR_BITS((SET_CHAR
*)out
, bitlength
);
59 else if (bitlength
<= SET_SHORT_SIZE
)
61 *((SET_SHORT
*)out
) = *((SET_SHORT
*)left
) &
62 *((SET_SHORT
*)right
);
63 MASK_UNUSED_SHORT_BITS((SET_SHORT
*)out
, bitlength
);
67 unsigned long len
= BITS_TO_WORDS (bitlength
);
68 register unsigned long i
;
70 for (i
= 0; i
< len
; i
++)
71 out
[i
] = left
[i
] & right
[i
];
72 MASK_UNUSED_WORD_BITS ((out
+ len
- 1),
73 bitlength
% SET_WORD_SIZE
);