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/*
* definitions for dc's "register" declarations
*
* Copyright (C) 1994 Free Software Foundation, Inc.
*
* This program 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.
*
* This program 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 this program; if not, you can either send email to this
* program's author (see below) or write to: The Free Software Foundation,
* Inc.; 675 Mass Ave. Cambridge, MA 02139, USA.
*/
#ifdef HAVE_LIMITS_H
# include <limits.h> /* UCHAR_MAX */
#endif
/* determine how many register stacks there are */
#ifndef DC_REGCOUNT
# ifndef UCHAR_MAX
# define DC_REGCOUNT 256
# else
# define DC_REGCOUNT (UCHAR_MAX+1)
# endif
#endif /* not DC_REGCOUNT */
/* efficiency hack for masking arbritrary integers to 0..(DC_REGCOUNT-1) */
#if (DC_REGCOUNT & (DC_REGCOUNT-1)) == 0 /* DC_REGCOUNT is power of 2 */
# define regmap(r) ((r) & (DC_REGCOUNT-1))
#else
# define regmap(r) ((r) % DC_REGCOUNT)
#endif
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