5 * Copyright (C) 1992,1993,1994
6 * W. Metzenthen, 22 Parker St, Ormond, Vic 3163,
7 * Australia. E-mail billm@vaxc.cc.monash.edu.au
10 * This copyright notice covers the redistribution and use of the
11 * FPU emulator developed by W. Metzenthen. It covers only its use
12 * in the 386BSD, FreeBSD and NetBSD operating systems. Any other
13 * use is not permitted under this copyright.
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must include information specifying
21 * that source code for the emulator is freely available and include
23 * a) an offer to provide the source code for a nominal distribution
25 * b) list at least two alternative methods whereby the source
26 * can be obtained, e.g. a publically accessible bulletin board
27 * and an anonymous ftp site from which the software can be
29 * 3. All advertising materials specifically mentioning features or use of
30 * this emulator must acknowledge that it was developed by W. Metzenthen.
31 * 4. The name of W. Metzenthen may not be used to endorse or promote
32 * products derived from this software without specific prior written
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
36 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
37 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
38 * W. METZENTHEN BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
39 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
40 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
41 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
42 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
43 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
44 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
47 * The purpose of this copyright, based upon the Berkeley copyright, is to
48 * ensure that the covered software remains freely available to everyone.
50 * The software (with necessary differences) is also available, but under
51 * the terms of the GNU copyleft, for the Linux operating system and for
52 * the djgpp ms-dos extender.
54 * W. Metzenthen June 1994.
57 * $FreeBSD: src/sys/gnu/i386/fpemul/status_w.h,v 1.6 1999/08/28 00:42:59 peter Exp $
58 * $DragonFly: src/sys/i386/gnu/fpemul/Attic/status_w.h,v 1.2 2003/06/17 04:28:34 dillon Exp $
68 #define Const__(x) $/**/x
73 #define SW_Backward Const__(0x8000) /* backward compatibility */
74 #define SW_C3 Const__(0x4000) /* condition bit 3 */
75 #define SW_Top Const__(0x3800) /* top of stack */
76 #define SW_Top_Shift Const__(11) /* shift for top of stack bits */
77 #define SW_C2 Const__(0x0400) /* condition bit 2 */
78 #define SW_C1 Const__(0x0200) /* condition bit 1 */
79 #define SW_C0 Const__(0x0100) /* condition bit 0 */
80 #define SW_Summary Const__(0x0080) /* exception summary */
81 #define SW_Stack_Fault Const__(0x0040) /* stack fault */
82 #define SW_Precision Const__(0x0020) /* loss of precision */
83 #define SW_Underflow Const__(0x0010) /* underflow */
84 #define SW_Overflow Const__(0x0008) /* overflow */
85 #define SW_Zero_Div Const__(0x0004) /* divide by zero */
86 #define SW_Denorm_Op Const__(0x0002) /* denormalized operand */
87 #define SW_Invalid Const__(0x0001) /* invalid operation */
89 #define SW_Exc_Mask Const__(0x27f) /* Status word exception bit mask */
96 #define COMP_No_Comp 4
97 #define COMP_Denormal 0x20
99 #define COMP_SNaN 0x80
101 #define setcc(cc) ({ \
102 status_word &= ~(SW_C0|SW_C1|SW_C2|SW_C3); \
103 status_word |= (cc) & (SW_C0|SW_C1|SW_C2|SW_C3); })
107 #endif /* _STATUS_H_ */