diff options
Diffstat (limited to 'sysdeps/ieee754')
| -rw-r--r-- | sysdeps/ieee754/huge_val.h | 38 | ||||
| -rw-r--r-- | sysdeps/ieee754/nan.h | 37 |
2 files changed, 54 insertions, 21 deletions
diff --git a/sysdeps/ieee754/huge_val.h b/sysdeps/ieee754/huge_val.h index 9d1785b75f..a2520859e4 100644 --- a/sysdeps/ieee754/huge_val.h +++ b/sysdeps/ieee754/huge_val.h @@ -27,6 +27,17 @@ /* IEEE positive infinity (-HUGE_VAL is negative infinity). */ +#ifdef __GNUC__ + +#define HUGE_VAL \ + (__extension__ \ + ((union { unsigned __l __attribute__((__mode__(__DI__))); double __d; }) \ + { __l: 0x7ff0000000000000ULL }).__d) + +#else /* not GCC */ + +typedef union { unsigned char __c[8]; double __d; } __huge_val_t; + #if __BYTE_ORDER == __BIG_ENDIAN #define __HUGE_VAL_bytes { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 } #endif @@ -34,13 +45,9 @@ #define __HUGE_VAL_bytes { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } #endif -#define __huge_val_t union { unsigned char __c[8]; double __d; } -#ifdef __GNUC__ -#define HUGE_VAL (__extension__ \ - ((__huge_val_t) { __c: __HUGE_VAL_bytes }).__d) -#else /* Not GCC. */ static __huge_val_t __huge_val = { __HUGE_VAL_bytes }; #define HUGE_VAL (__huge_val.__d) + #endif /* GCC. */ @@ -48,6 +55,17 @@ static __huge_val_t __huge_val = { __HUGE_VAL_bytes }; #ifdef __USE_ISOC9X +#ifdef __GNUC__ + +#define HUGE_VALF \ + (__extension__ \ + ((union { unsigned __l __attribute__((__mode__(__SI__))); float __d; }) \ + { __l: 0x7f800000UL }).__d) + +#else /* not GCC */ + +typedef union { unsigned char __c[4]; float __f; } __huge_valf_t; + #if __BYTE_ORDER == __BIG_ENDIAN #define __HUGE_VALF_bytes { 0x7f, 0x80, 0, 0 } #endif @@ -55,13 +73,9 @@ static __huge_val_t __huge_val = { __HUGE_VAL_bytes }; #define __HUGE_VALF_bytes { 0, 0, 0x80, 0x7f } #endif -#define __huge_valf_t union { unsigned char __c[4]; float __f; } -#ifdef __GNUC__ -#define HUGE_VALF (__extension__ \ - ((__huge_valf_t) { __c: __HUGE_VALF_bytes }).__f) -#else /* Not GCC. */ static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes }; #define HUGE_VALF (__huge_valf.__f) + #endif /* GCC. */ @@ -69,6 +83,6 @@ static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes }; same as `double'. */ #define HUGE_VALL HUGE_VAL -#endif /* __USE_ISOC9X. */ +#endif /* __USE_ISOC9X. */ -#endif /* huge_val.h */ +#endif /* huge_val.h */ diff --git a/sysdeps/ieee754/nan.h b/sysdeps/ieee754/nan.h index bea98d96d4..d4e6842562 100644 --- a/sysdeps/ieee754/nan.h +++ b/sysdeps/ieee754/nan.h @@ -1,5 +1,5 @@ /* `NAN' constant for IEEE 754 machines. - Copyright (C) 1992, 1996 Free Software Foundation, Inc. + Copyright (C) 1992, 1996, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -23,23 +23,42 @@ /* IEEE Not A Number. */ +#ifdef __GNUC__ + +#define NAN \ + (__extension__ \ + ((union { unsigned __l __attribute__((__mode__(__DI__))); double __d; }) \ + { __l: 0x7ff8000000000000ULL }).__d) + +#define NANF \ + (__extension__ \ + ((union { unsigned __l __attribute__((__mode__(__SI__))); flaot __d; }) \ + { __l: 0x7fc00000UL }).__d) + +#else + #include <endian.h> #if __BYTE_ORDER == __BIG_ENDIAN #define __nan_bytes { 0x7f, 0xf8, 0, 0, 0, 0, 0, 0 } +#define __nanf_bytes { 0x7f, 0xc0, 0, 0 } #endif #if __BYTE_ORDER == __LITTLE_ENDIAN #define __nan_bytes { 0, 0, 0, 0, 0, 0, 0xf8, 0x7f } +#define __nanf_bytes { 0, 0, 0xc0, 0x7f } #endif -#ifdef __GNUC__ -#define NAN \ - (__extension__ ((union { unsigned char __c[8]; \ - double __d; }) \ - { __nan_bytes }).__d) -#else /* Not GCC. */ -static CONST char __nan[8] = __nan_bytes; -#define NAN (*(CONST double *) __nan) +static union { unsigned char __c[8]; double __d; } __nan = { __nan_bytes }; +#define NAN (__nan.__d) + +static union { unsigned char __c[4]; double __d; } __nanf = { __nanf_bytes }; +#define NANF (__nanf.__d) + #endif /* GCC. */ +/* Generally there is no separate `long double' format and it is the + same as `double'. */ + +#define NANL NAN + #endif /* nan.h */ |