1 /* $NetBSD: ieeefp.h,v 1.7 2017/03/22 23:11:10 chs 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 #include <fenv.h> 16 17 #if defined(_NETBSD_SOURCE) 18 19 typedef int fp_except; 20 21 #ifdef __SH_FPU_ANY__ 22 23 /* hardfloat */ 24 25 #define FP_X_INV FE_INVALID /* invalid operation exception */ 26 #define FP_X_DZ FE_DIVBYZERO /* divide-by-zero exception */ 27 #define FP_X_OFL FE_OVERFLOW /* overflow exception */ 28 #define FP_X_UFL FE_UNDERFLOW /* underflow exception */ 29 #define FP_X_IMP FE_INEXACT /* imprecise (loss of precision) */ 30 31 typedef enum { 32 FP_RN=FE_TONEAREST, /* round to nearest representable number */ 33 FP_RM=FE_DOWNWARD, /* round toward negative infinity */ 34 FP_RP=FE_UPWARD, /* round toward positive infinity */ 35 FP_RZ=FE_TOWARDZERO /* round to zero (truncate) */ 36 } fp_rnd; 37 38 #else /* __SH_FPU_ANY__ */ 39 40 /* softfloat */ 41 42 #define FP_X_INV 0x01 /* invalid operation exception */ 43 #define FP_X_DZ 0x04 /* divide-by-zero exception */ 44 #define FP_X_OFL 0x08 /* overflow exception */ 45 #define FP_X_UFL 0x10 /* underflow exception */ 46 #define FP_X_IMP 0x20 /* imprecise (loss of precision) */ 47 48 typedef enum { 49 FP_RN=0, /* round to nearest representable number */ 50 FP_RM=1, /* round toward negative infinity */ 51 FP_RP=2, /* round toward positive infinity */ 52 FP_RZ=3 /* round to zero (truncate) */ 53 } fp_rnd; 54 55 /* adjust for FP_* and FE_* value differences */ 56 57 static inline fp_except __FPE(int __fe)58__FPE(int __fe) 59 { 60 int __fp = 0; 61 62 if (__fe & FE_DIVBYZERO) 63 __fp |= FP_X_DZ; 64 if (__fe & FE_INEXACT) 65 __fp |= FP_X_IMP; 66 if (__fe & FE_INVALID) 67 __fp |= FP_X_INV; 68 if (__fe & FE_OVERFLOW) 69 __fp |= FP_X_OFL; 70 if (__fe & FE_UNDERFLOW) 71 __fp |= FP_X_UFL; 72 return __fp; 73 } 74 75 static inline int __FEE(fp_except __fp)76__FEE(fp_except __fp) 77 { 78 int __fe = 0; 79 80 if (__fp & FP_X_DZ) 81 __fe |= FE_DIVBYZERO; 82 if (__fp & FP_X_IMP) 83 __fe |= FE_INEXACT; 84 if (__fp & FP_X_INV) 85 __fe |= FE_INVALID; 86 if (__fp & FP_X_OFL) 87 __fe |= FE_OVERFLOW; 88 if (__fp & FP_X_UFL) 89 __fe |= FE_UNDERFLOW; 90 return __fe; 91 } 92 93 static inline fp_rnd __FPR(int __fe)94__FPR(int __fe) 95 { 96 97 switch (__fe) { 98 case FE_TONEAREST: 99 return FP_RN; 100 case FE_DOWNWARD: 101 return FP_RM; 102 case FE_UPWARD: 103 return FP_RP; 104 case FE_TOWARDZERO: 105 return FP_RZ; 106 default: 107 return FP_RN; 108 } 109 } 110 111 static inline int __FER(fp_rnd __fp)112__FER(fp_rnd __fp) 113 { 114 115 switch (__fp) { 116 case FP_RN: 117 return FE_TONEAREST; 118 case FP_RM: 119 return FE_DOWNWARD; 120 case FP_RP: 121 return FE_UPWARD; 122 case FP_RZ: 123 return FE_TOWARDZERO; 124 default: 125 return FE_TONEAREST; 126 } 127 } 128 129 #endif /* __SH_FPU_ANY__ */ 130 131 #endif /* !_ISOC99_SOURCE */ 132 133 #endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */ 134 135 #endif /* !_SH3_IEEEFP_H_ */ 136