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 #ifdef __ASSEMBLY__
13 #define Const_(x) $##x
14 #else
15 #define Const_(x) x
16 #endif
17
18 #ifndef SW_C1
19 #include "fpu_emu.h"
20 #endif /* SW_C1 */
21
22 #define FPU_BUSY Const_(0x8000) /* FPU busy bit (8087 compatibility) */
23 #define EX_ErrorSummary Const_(0x0080) /* Error summary status */
24 /* Special exceptions: */
25 #define EX_INTERNAL Const_(0x8000) /* Internal error in wm-FPU-emu */
26 #define EX_StackOver Const_(0x0041|SW_C1) /* stack overflow */
27 #define EX_StackUnder Const_(0x0041) /* stack underflow */
28 /* Exception flags: */
29 #define EX_Precision Const_(0x0020) /* loss of precision */
30 #define EX_Underflow Const_(0x0010) /* underflow */
31 #define EX_Overflow Const_(0x0008) /* overflow */
32 #define EX_ZeroDiv Const_(0x0004) /* divide by zero */
33 #define EX_Denormal Const_(0x0002) /* denormalized operand */
34 #define EX_Invalid Const_(0x0001) /* invalid operation */
35
36 #define PRECISION_LOST_UP Const_((EX_Precision | SW_C1))
37 #define PRECISION_LOST_DOWN Const_(EX_Precision)
38
39 #ifndef __ASSEMBLY__
40
41 #ifdef DEBUG
42 #define EXCEPTION(x) { printk("exception in %s at line %d\n", \
43 __FILE__, __LINE__); FPU_exception(x); }
44 #else
45 #define EXCEPTION(x) FPU_exception(x)
46 #endif
47
48 #endif /* __ASSEMBLY__ */
49
50 #endif /* _EXCEPTION_H_ */
51
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