| /* 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, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* As a special exception, if you link this library with other files, |
| some of which are compiled with GCC, to produce an executable, |
| this library does not by itself cause the resulting executable |
| to be covered by the GNU General Public License. |
| This exception does not however invalidate any other reasons why |
| the executable file might be covered by the GNU General Public License. */ |
| |
| #define __CHILL_LIB__ |
| |
| #include <stdio.h> |
| #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); |
| } |
| } |