/*---------------------------------------------------------------------------+
   |  exception.h                                                              |
   |                                                                           |
   | Copyright (C) 1992    W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
   |                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au    |
   |                                                                           |
   +---------------------------------------------------------------------------*/
  
  #ifndef _EXCEPTION_H_
  #define _EXCEPTION_H_

  #ifdef __ASSEMBLY__
  #define	Const_(x)	$##x
  #else
  #define	Const_(x)	x
  #endif
  
  #ifndef SW_C1
  #include "fpu_emu.h"
  #endif /* SW_C1 */

  #define FPU_BUSY        Const_(0x8000)	/* FPU busy bit (8087 compatibility) */
  #define EX_ErrorSummary Const_(0x0080)	/* Error summary status */

  /* Special exceptions: */
  #define	EX_INTERNAL	Const_(0x8000)	/* Internal error in wm-FPU-emu */
  #define EX_StackOver	Const_(0x0041|SW_C1)	/* stack overflow */
  #define EX_StackUnder	Const_(0x0041)	/* stack underflow */
  /* Exception flags: */
  #define EX_Precision	Const_(0x0020)	/* loss of precision */
  #define EX_Underflow	Const_(0x0010)	/* underflow */
  #define EX_Overflow	Const_(0x0008)	/* overflow */
  #define EX_ZeroDiv	Const_(0x0004)	/* divide by zero */
  #define EX_Denormal	Const_(0x0002)	/* denormalized operand */
  #define EX_Invalid	Const_(0x0001)	/* invalid operation */

  #define PRECISION_LOST_UP    Const_((EX_Precision | SW_C1))
  #define PRECISION_LOST_DOWN  Const_(EX_Precision)

  #ifndef __ASSEMBLY__
  
  #ifdef DEBUG
  #define	EXCEPTION(x)	{ printk("exception in %s at line %d
  ", \
  	__FILE__, __LINE__); FPU_exception(x); }
  #else
  #define	EXCEPTION(x)	FPU_exception(x)
  #endif

  #endif /* __ASSEMBLY__ */

  
  #endif /* _EXCEPTION_H_ */