mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-26 06:19:24 +08:00
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/* 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 __eqpowerset
|
|
*
|
|
* parameters:
|
|
* left left powerset
|
|
* right right powerset
|
|
* bitlength length of powerset in bits
|
|
*
|
|
* returns:
|
|
* 1 if powersets are equal, bit for bit
|
|
*
|
|
* exceptions:
|
|
* none
|
|
*
|
|
* abstract:
|
|
* compares two powersets for equality
|
|
*
|
|
*/
|
|
int
|
|
__eqpowerset (left, right, bitlength)
|
|
SET_WORD *left;
|
|
SET_WORD *right;
|
|
unsigned long bitlength;
|
|
{
|
|
#ifndef USE_CHARS
|
|
if (bitlength <= SET_CHAR_SIZE)
|
|
{
|
|
SET_CHAR c = *(SET_CHAR *)left ^ *(SET_CHAR *)right;
|
|
MASK_UNUSED_CHAR_BITS (&c, bitlength);
|
|
return (c == 0) ? 1 : 0;
|
|
}
|
|
else if (bitlength <= SET_SHORT_SIZE)
|
|
{
|
|
SET_SHORT c = *(SET_SHORT *)left ^ *(SET_SHORT *)right;
|
|
MASK_UNUSED_SHORT_BITS (&c, bitlength);
|
|
return (c == 0) ? 1 : 0;
|
|
}
|
|
else if (bitlength <= SET_WORD_SIZE)
|
|
{
|
|
SET_WORD c = *(SET_WORD *)left ^ *(SET_WORD *)right;
|
|
MASK_UNUSED_WORD_BITS (&c, bitlength % SET_WORD_SIZE);
|
|
return (c == 0) ? 1 : 0;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
SET_WORD c;
|
|
register unsigned long i;
|
|
unsigned long len = bitlength / SET_WORD_SIZE;
|
|
|
|
for (i = 0; i < len; i++) /* a word-oriented memcmp */
|
|
if (left[i] != right[i])
|
|
return 0;
|
|
/* do the last (possibly partial) word */
|
|
bitlength %= SET_WORD_SIZE;
|
|
if (bitlength == 0)
|
|
return 1;
|
|
c = left[i] ^ right[i];
|
|
MASK_UNUSED_WORD_BITS (&c, bitlength);
|
|
return (c == 0) ? 1 : 0;
|
|
}
|
|
}
|