root/arch/x86/math-emu/exception.h

INCLUDED FROM

/*---------------------------------------------------------------------------+
 |  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\n", \
        __FILE__, __LINE__); FPU_exception(x); }
#else
#define EXCEPTION(x)    FPU_exception(x)
#endif

#endif /* __ASSEMBLY__ */

#endif /* _EXCEPTION_H_ */