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ieeefp.h revision 1.1.108.1 
      1 /*	$NetBSD: ieeefp.h,v 1.1.108.1 2009/05/04 08:12:09 yamt Exp $	*/
      2 
      3 /*
      4  * Written by J.T. Conklin, Apr 6, 1995
      5  * Public domain.
      6  */
      7 
      8 #ifndef _X86_IEEEFP_H_
      9 #define _X86_IEEEFP_H_
     10 
     11 #include <sys/featuretest.h>
     12 
     13 #if defined(_NETBSD_SOURCE) || defined(_ISOC99_SOURCE)
     14 
     15 typedef int fenv_t;
     16 typedef int fexcept_t;
     17 
     18 #define	FE_INVALID	0x01	/* invalid operation exception */
     19 #define	FE_DENORMAL	0x02	/* denormalization exception */
     20 #define	FE_DIVBYZERO	0x04	/* divide-by-zero exception */
     21 #define	FE_OVERFLOW	0x08	/* underflow exception */
     22 #define	FE_UNDERFLOW	0x10	/* overflow exception */
     23 #define	FE_INEXACT	0x20	/* imprecise (loss of precision) */
     24 
     25 #define	FE_ALL_EXCEPT	0x3f
     26 
     27 #define	FE_TONEAREST	0	/* round to nearest representable number */
     28 #define	FE_DOWNWARD	1	/* round toward negative infinity */
     29 #define	FE_UPWARD	2	/* round toward positive infinity */
     30 #define	FE_TOWARDZERO	3	/* round to zero (truncate) */
     31 
     32 #if !defined(_ISOC99_SOURCE)
     33 
     34 typedef int fp_except;
     35 #define FP_X_INV	FE_INVALID	/* invalid operation exception */
     36 #define FP_X_DNML	FE_DENORMAL	/* denormalization exception */
     37 #define FP_X_DZ		FE_DIVBYZERO	/* divide-by-zero exception */
     38 #define FP_X_OFL	FE_OVERFLOW	/* overflow exception */
     39 #define FP_X_UFL	FE_UNDERFLOW	/* underflow exception */
     40 #define FP_X_IMP	FE_INEXACT	/* imprecise (loss of precision) */
     41 
     42 typedef enum {
     43     FP_RN=FE_TONEAREST,		/* round to nearest representable number */
     44     FP_RM=FE_DOWNWARD,		/* round toward negative infinity */
     45     FP_RP=FE_UPWARD,		/* round toward positive infinity */
     46     FP_RZ=FE_TOWARDZERO		/* round to zero (truncate) */
     47 } fp_rnd;
     48 
     49 #endif /* !_ISOC99_SOURCE */
     50 
     51 #endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */
     52 
     53 #endif /* _X86_IEEEFP_H_ */
     54