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Diffstat (limited to 'sys/gnu/fpemul/control_w.h')
| -rw-r--r-- | sys/gnu/fpemul/control_w.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/sys/gnu/fpemul/control_w.h b/sys/gnu/fpemul/control_w.h new file mode 100644 index 000000000000..2f3dc2ec854a --- /dev/null +++ b/sys/gnu/fpemul/control_w.h @@ -0,0 +1,95 @@ +/* + * 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. + * + * + * $Id: control_w.h,v 1.3 1994/06/10 07:44:07 rich 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_ */ |