arch/x86/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_ */