1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*---------------------------------------------------------------------------+
3 | exception.h |
4 | |
5 | Copyright (C) 1992 W. Metzenthen, 22 Parker St, Ormond, Vic 3163, |
6 | Australia. E-mail billm@vaxc.cc.monash.edu.au |
7 | |
8 +---------------------------------------------------------------------------*/
9
10 #ifndef _EXCEPTION_H_
11 #define _EXCEPTION_H_
12
13 #ifdef __ASSEMBLY__
14 #define Const_(x) $##x
15 #else
16 #define Const_(x) x
17 #endif
18
19 #ifndef SW_C1
20 #include "fpu_emu.h"
21 #endif /* SW_C1 */
22
23 #define FPU_BUSY Const_(0x8000) /* FPU busy bit (8087 compatibility) */
24 #define EX_ErrorSummary Const_(0x0080) /* Error summary status */
25 /* Special exceptions: */
26 #define EX_INTERNAL Const_(0x8000) /* Internal error in wm-FPU-emu */
27 #define EX_StackOver Const_(0x0041|SW_C1) /* stack overflow */
28 #define EX_StackUnder Const_(0x0041) /* stack underflow */
29 /* Exception flags: */
30 #define EX_Precision Const_(0x0020) /* loss of precision */
31 #define EX_Underflow Const_(0x0010) /* underflow */
32 #define EX_Overflow Const_(0x0008) /* overflow */
33 #define EX_ZeroDiv Const_(0x0004) /* divide by zero */
34 #define EX_Denormal Const_(0x0002) /* denormalized operand */
35 #define EX_Invalid Const_(0x0001) /* invalid operation */
36
37 #define PRECISION_LOST_UP Const_((EX_Precision | SW_C1))
38 #define PRECISION_LOST_DOWN Const_(EX_Precision)
39
40 #ifndef __ASSEMBLY__
41
42 #ifdef DEBUG
43 #define EXCEPTION(x) { printk("exception in %s at line %d\n", \
44 __FILE__, __LINE__); FPU_exception(x); }
45 #else
46 #define EXCEPTION(x) FPU_exception(x)
47 #endif
48
49 #endif /* __ASSEMBLY__ */
50
51 #endif /* _EXCEPTION_H_ */