diff options
Diffstat (limited to 'kernel/arch/x86/math-emu/exception.h')
| -rw-r--r-- | kernel/arch/x86/math-emu/exception.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/kernel/arch/x86/math-emu/exception.h b/kernel/arch/x86/math-emu/exception.h new file mode 100644 index 000000000..67f43a468 --- /dev/null +++ b/kernel/arch/x86/math-emu/exception.h @@ -0,0 +1,50 @@ +/*---------------------------------------------------------------------------+ + | 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_ */ |