/* *  control_w.h * * * Copyright (C) 1992,1993,1994 *                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163, *                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au * All rights reserved. * * This copyright notice covers the redistribution and use of the * FPU emulator developed by W. Metzenthen. It covers only its use * in the 386BSD, FreeBSD and NetBSD operating systems. Any other * use is not permitted under this copyright. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must include information specifying *    that source code for the emulator is freely available and include *    either: *      a) an offer to provide the source code for a nominal distribution *         fee, or *      b) list at least two alternative methods whereby the source *         can be obtained, e.g. a publically accessible bulletin board *         and an anonymous ftp site from which the software can be *         downloaded. * 3. All advertising materials specifically mentioning features or use of *    this emulator must acknowledge that it was developed by W. Metzenthen. * 4. The name of W. Metzenthen may not be used to endorse or promote *    products derived from this software without specific prior written *    permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL * W. METZENTHEN BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * * The purpose of this copyright, based upon the Berkeley copyright, is to * ensure that the covered software remains freely available to everyone. * * The software (with necessary differences) is also available, but under * the terms of the GNU copyleft, for the Linux operating system and for * the djgpp ms-dos extender. * * W. Metzenthen   June 1994. * * * $FreeBSD: src/sys/gnu/i386/fpemul/control_w.h,v 1.4.8.1 1999/09/05 08:09:33 peter Exp $ * */#ifndef _CONTROLW_H_#define _CONTROLW_H_#ifdef LOCORE#define	_Const_(x)	$/**/x#else#define	_Const_(x)	x#endif#define CW_RC		_Const_(0x0C00)	/* rounding control */#define CW_PC		_Const_(0x0300)	/* precision control */#define CW_Precision	Const_(0x0020)	/* loss of precision mask */#define CW_Underflow	Const_(0x0010)	/* underflow mask */#define CW_Overflow	Const_(0x0008)	/* overflow mask */#define CW_ZeroDiv	Const_(0x0004)	/* divide by zero mask */#define CW_Denormal	Const_(0x0002)	/* denormalized operand mask */#define CW_Invalid	Const_(0x0001)	/* invalid operation mask */#define CW_Exceptions  	_Const_(0x003f)	/* all masks */#define RC_RND		_Const_(0x0000)#define RC_DOWN		_Const_(0x0400)#define RC_UP		_Const_(0x0800)#define RC_CHOP		_Const_(0x0C00)/* p 15-5: Precision control bits affect only the following:   ADD, SUB(R), MUL, DIV(R), and SQRT */#define PR_24_BITS      _Const_(0x000)#define PR_53_BITS      _Const_(0x200)#define PR_64_BITS      _Const_(0x300)/* FULL_PRECISION simulates all exceptions masked */#define FULL_PRECISION  (PR_64_BITS | RC_RND | 0x3f)#endif				/* _CONTROLW_H_ */