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);