1 /*---------------------------------------------------------------------------+
2  |  exception.h                                                              |
3  |                                                                           |
4  | Copyright (C) 1992    W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
5  |                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au    |
6  |                                                                           |
7  +---------------------------------------------------------------------------*/
8 
9 #ifndef _EXCEPTION_H_
10 #define _EXCEPTION_H_
11 
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 
38 #define PRECISION_LOST_UP    Const_((EX_Precision | SW_C1))
39 #define PRECISION_LOST_DOWN  Const_(EX_Precision)
40 
41 
42 #ifndef __ASSEMBLY__
43 
44 #ifdef DEBUG
45 #define	EXCEPTION(x)	{ printk("exception in %s at line %d\n", \
46 	__FILE__, __LINE__); FPU_exception(x); }
47 #else
48 #define	EXCEPTION(x)	FPU_exception(x)
49 #endif
50 
51 #endif /* __ASSEMBLY__ */
52 
53 #endif /* _EXCEPTION_H_ */
54