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54 lines
1.8 KiB
54 lines
1.8 KiB
20 years ago
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/*---------------------------------------------------------------------------+
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| exception.h |
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| Copyright (C) 1992 W. Metzenthen, 22 Parker St, Ormond, Vic 3163, |
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| Australia. E-mail billm@vaxc.cc.monash.edu.au |
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+---------------------------------------------------------------------------*/
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#ifndef _EXCEPTION_H_
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#define _EXCEPTION_H_
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#ifdef __ASSEMBLY__
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#define Const_(x) $##x
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#else
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#define Const_(x) x
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#endif
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#ifndef SW_C1
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#include "fpu_emu.h"
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#endif /* SW_C1 */
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#define FPU_BUSY Const_(0x8000) /* FPU busy bit (8087 compatibility) */
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#define EX_ErrorSummary Const_(0x0080) /* Error summary status */
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/* Special exceptions: */
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#define EX_INTERNAL Const_(0x8000) /* Internal error in wm-FPU-emu */
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#define EX_StackOver Const_(0x0041|SW_C1) /* stack overflow */
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#define EX_StackUnder Const_(0x0041) /* stack underflow */
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/* Exception flags: */
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#define EX_Precision Const_(0x0020) /* loss of precision */
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#define EX_Underflow Const_(0x0010) /* underflow */
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#define EX_Overflow Const_(0x0008) /* overflow */
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#define EX_ZeroDiv Const_(0x0004) /* divide by zero */
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#define EX_Denormal Const_(0x0002) /* denormalized operand */
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#define EX_Invalid Const_(0x0001) /* invalid operation */
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#define PRECISION_LOST_UP Const_((EX_Precision | SW_C1))
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#define PRECISION_LOST_DOWN Const_(EX_Precision)
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#ifndef __ASSEMBLY__
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#ifdef DEBUG
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#define EXCEPTION(x) { printk("exception in %s at line %d\n", \
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__FILE__, __LINE__); FPU_exception(x); }
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#else
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#define EXCEPTION(x) FPU_exception(x)
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* _EXCEPTION_H_ */
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