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Diffstat (limited to 'sys/gnu/fpemul/status_w.h')
| -rw-r--r-- | sys/gnu/fpemul/status_w.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/sys/gnu/fpemul/status_w.h b/sys/gnu/fpemul/status_w.h new file mode 100644 index 0000000000000..e54b36415c9d2 --- /dev/null +++ b/sys/gnu/fpemul/status_w.h @@ -0,0 +1,106 @@ +/* + * status_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: status_w.h,v 1.3 1994/06/10 07:45:01 rich Exp $ + * + */ + + +#ifndef _STATUS_H_ +#define _STATUS_H_ + + +#ifdef LOCORE +#define Const__(x) $/**/x +#else +#define Const__(x) x +#endif + +#define SW_Backward Const__(0x8000) /* backward compatibility */ +#define SW_C3 Const__(0x4000) /* condition bit 3 */ +#define SW_Top Const__(0x3800) /* top of stack */ +#define SW_Top_Shift Const__(11) /* shift for top of stack bits */ +#define SW_C2 Const__(0x0400) /* condition bit 2 */ +#define SW_C1 Const__(0x0200) /* condition bit 1 */ +#define SW_C0 Const__(0x0100) /* condition bit 0 */ +#define SW_Summary Const__(0x0080) /* exception summary */ +#define SW_Stack_Fault Const__(0x0040) /* stack fault */ +#define SW_Precision Const__(0x0020) /* loss of precision */ +#define SW_Underflow Const__(0x0010) /* underflow */ +#define SW_Overflow Const__(0x0008) /* overflow */ +#define SW_Zero_Div Const__(0x0004) /* divide by zero */ +#define SW_Denorm_Op Const__(0x0002) /* denormalized operand */ +#define SW_Invalid Const__(0x0001) /* invalid operation */ + +#define SW_Exc_Mask Const__(0x27f) /* Status word exception bit mask */ + +#ifndef LOCORE + +#define COMP_A_gt_B 1 +#define COMP_A_eq_B 2 +#define COMP_A_lt_B 3 +#define COMP_No_Comp 4 +#define COMP_Denormal 0x20 +#define COMP_NaN 0x40 +#define COMP_SNaN 0x80 + +#define setcc(cc) ({ \ + status_word &= ~(SW_C0|SW_C1|SW_C2|SW_C3); \ + status_word |= (cc) & (SW_C0|SW_C1|SW_C2|SW_C3); }) + +#endif /* LOCORE */ + +#endif /* _STATUS_H_ */ |