/* 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 #include "powerset.h" /* * function __xorpowerset * * parameters: * out return from __xorpowerset * left left powerset * right right powerset * bitlength length of powerset in bits * * returns: * void * * exceptions: * none * * abstract: * xor's 2 powersets * */ void __xorpowerset (out, left, right, bitlength) SET_WORD *out; SET_WORD *left; SET_WORD *right; unsigned long bitlength; { if (bitlength <= SET_CHAR_SIZE) { *((SET_CHAR *)out) = *((SET_CHAR *)left) ^ *((SET_CHAR *)right); MASK_UNUSED_CHAR_BITS((SET_CHAR *)out, bitlength); } else if (bitlength <= SET_SHORT_SIZE) { *((SET_SHORT *)out) = *((SET_SHORT *)left) ^ *((SET_SHORT *)right); 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] ^ right[i]; MASK_UNUSED_WORD_BITS ((out + len - 1), bitlength % SET_WORD_SIZE); } }