diff options
Diffstat (limited to 'sysdeps/ieee754/huge_val.h')
| -rw-r--r-- | sysdeps/ieee754/huge_val.h | 40 |
1 files changed, 23 insertions, 17 deletions
diff --git a/sysdeps/ieee754/huge_val.h b/sysdeps/ieee754/huge_val.h index 63a8aad9f5..4f8b0a9574 100644 --- a/sysdeps/ieee754/huge_val.h +++ b/sysdeps/ieee754/huge_val.h @@ -1,6 +1,6 @@ -/* `HUGE_VAL' constant for IEEE 754 machines (where it is infinity). +/* `HUGE_VAL' constants for IEEE 754 machines (where it is infinity). Used by <stdlib.h> and <math.h> functions for overflow. - Copyright (C) 1992, 1995, 1996 Free Software Foundation, Inc. + Copyright (C) 1992, 1995, 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 @@ -44,43 +44,49 @@ static __huge_val_t __huge_val = { __HUGE_VAL_bytes }; #endif /* GCC. */ -/* GNU extensions: (float) HUGE_VALf and (long double) HUGE_VALl. */ +/* ISO C 9X extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */ -#ifdef __USE_GNU +#ifdef __USE_ISOC9X #if __BYTE_ORDER == __BIG_ENDIAN -#define __HUGE_VALf_bytes { 0x7f, 0x80, 0, 0 } +#define __HUGE_VALF_bytes { 0x7f, 0x80, 0, 0 } #endif #if __BYTE_ORDER == __LITTLE_ENDIAN -#define __HUGE_VALf_bytes { 0, 0, 0x80, 0x7f } +#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) +#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) +static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes }; +#define HUGE_VALF (__huge_valf.__f) #endif /* GCC. */ + #if __BYTE_ORDER == __BIG_ENDIAN -#define __HUGE_VALl_bytes { 0x7f, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } +#define __HUGE_VALL_bytes { 0x7f, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } #endif #if __BYTE_ORDER == __LITTLE_ENDIAN -#define __HUGE_VALl_bytes { 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0x7f, 0, 0 } +#define __HUGE_VALL_bytes { 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0x7f, 0, 0 } #endif #define __huge_vall_t union { unsigned char __c[12]; long double __ld; } #ifdef __GNUC__ -#define HUGE_VALl (__extension__ \ - ((__huge_vall_t) { __c: __HUGE_VALl_bytes }).__ld) +#define HUGE_VALL (__extension__ \ + ((__huge_vall_t) { __c: __HUGE_VALL_bytes }).__ld) #else /* Not GCC. */ -static __huge_vall_t __huge_vall = { __HUGE_VALl_bytes }; -#define HUGE_VALl (__huge_vall.__ld) +static __huge_vall_t __huge_vall = { __HUGE_VALL_bytes }; +#define HUGE_VALL (__huge_vall.__ld) #endif /* GCC. */ -#endif /* __USE_GNU. */ + +/* Expression representing positive infinity. Here it is the same as + HUGE_VALF. */ +#define INFINITY HUGE_VALF + +#endif /* __USE_ISOC9X. */ #endif /* huge_val.h */ |