File: /usr/src/linux/arch/i386/math-emu/exception.h

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