Home | History | Annotate | Line # | Download | only in include
ieeefp.h revision 1.4.62.1 
      1 /* $NetBSD: ieeefp.h,v 1.4.62.1 2017/04/26 02:53:07 pgoyette Exp $ */
      2 
      3 /*
      4  * Written by J.T. Conklin, Apr 6, 1995
      5  * Public domain.
      6  */
      7 
      8 #ifndef _SH3_IEEEFP_H_
      9 #define	_SH3_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	/* overflow exception */
     22 #define	FE_UNDERFLOW	0x10	/* underflow 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(_NETBSD_SOURCE)
     33 
     34 typedef int fp_except;
     35 <<<<<<< ieeefp.h
     36 =======
     37 
     38 #ifdef	__SH_FPU_ANY__
     39 
     40 /* hardfloat */
     41 
     42 >>>>>>> 1.7
     43 #define	FP_X_INV	FE_INVALID	/* invalid operation exception */
     44 #define	FP_X_DNML	FE_DENORMAL	/* denormalization exception */
     45 #define	FP_X_DZ		FE_DIVBYZERO	/* divide-by-zero exception */
     46 #define	FP_X_OFL	FE_OVERFLOW	/* overflow exception */
     47 #define	FP_X_UFL	FE_UNDERFLOW	/* underflow exception */
     48 #define	FP_X_IMP	FE_INEXACT	/* imprecise (loss of precision) */
     49 
     50 typedef enum {
     51 	FP_RN=FE_TONEAREST,	/* round to nearest representable number */
     52 	FP_RM=FE_DOWNWARD,	/* round toward negative infinity */
     53 	FP_RP=FE_UPWARD,	/* round toward positive infinity */
     54 	FP_RZ=FE_TOWARDZERO	/* round to zero (truncate) */
     55 } fp_rnd;
     56 
     57 #else /* __SH_FPU_ANY__ */
     58 
     59 /* softfloat */
     60 
     61 #define	FP_X_INV	0x01	/* invalid operation exception */
     62 #define	FP_X_DZ		0x04	/* divide-by-zero exception */
     63 #define	FP_X_OFL	0x08	/* overflow exception */
     64 #define	FP_X_UFL	0x10	/* underflow exception */
     65 #define	FP_X_IMP	0x20	/* imprecise (loss of precision) */
     66 
     67 typedef enum {
     68 	FP_RN=0,		/* round to nearest representable number */
     69 	FP_RM=1,		/* round toward negative infinity */
     70 	FP_RP=2,        	/* round toward positive infinity */
     71 	FP_RZ=3			/* round to zero (truncate) */
     72 } fp_rnd;
     73 
     74 /* adjust for FP_* and FE_* value differences */
     75 
     76 static inline fp_except
     77 __FPE(int __fe)
     78 {
     79 	int __fp = 0;
     80 
     81 	if (__fe & FE_DIVBYZERO)
     82 		__fp |= FP_X_DZ;
     83 	if (__fe & FE_INEXACT)
     84 		__fp |= FP_X_IMP;
     85 	if (__fe & FE_INVALID)
     86 		__fp |= FP_X_INV;
     87 	if (__fe & FE_OVERFLOW)
     88 		__fp |= FP_X_OFL;
     89 	if (__fe & FE_UNDERFLOW)
     90 		__fp |= FP_X_UFL;
     91 	return __fp;
     92 }
     93 
     94 static inline int
     95 __FEE(fp_except __fp)
     96 {
     97 	int __fe = 0;
     98 
     99 	if (__fp & FP_X_DZ)
    100 		__fe |= FE_DIVBYZERO;
    101 	if (__fp & FP_X_IMP)
    102 		__fe |= FE_INEXACT;
    103 	if (__fp & FP_X_INV)
    104 		__fe |= FE_INVALID;
    105 	if (__fp & FP_X_OFL)
    106 		__fe |= FE_OVERFLOW;
    107 	if (__fp & FP_X_UFL)
    108 		__fe |= FE_UNDERFLOW;
    109 	return __fe;
    110 }
    111 
    112 static inline fp_rnd
    113 __FPR(int __fe)
    114 {
    115 
    116 	switch (__fe) {
    117 	case FE_TONEAREST:
    118 		return FP_RN;
    119 	case FE_DOWNWARD:
    120 		return FP_RM;
    121 	case FE_UPWARD:
    122 		return FP_RP;
    123 	case FE_TOWARDZERO:
    124 		return FP_RZ;
    125 	default:
    126 		return FP_RN;
    127 	}
    128 }
    129 
    130 static inline int
    131 __FER(fp_rnd __fp)
    132 {
    133 
    134 	switch (__fp) {
    135 	case FP_RN:
    136 		return FE_TONEAREST;
    137 	case FP_RM:
    138 		return FE_DOWNWARD;
    139 	case FP_RP:
    140 		return FE_UPWARD;
    141 	case FP_RZ:
    142 		return FE_TOWARDZERO;
    143 	default:
    144 		return FE_TONEAREST;
    145 	}
    146 }
    147 
    148 #endif /* __SH_FPU_ANY__ */
    149 
    150 #endif /* !_ISOC99_SOURCE */
    151 
    152 #endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */
    153 
    154 #endif /* !_SH3_IEEEFP_H_ */
    155