diff options
Diffstat (limited to 'sysdeps/i386')
| -rw-r--r-- | sysdeps/i386/bits/huge_val.h | 57 |
1 files changed, 35 insertions, 22 deletions
diff --git a/sysdeps/i386/bits/huge_val.h b/sysdeps/i386/bits/huge_val.h index 23127b4031..65e500b47d 100644 --- a/sysdeps/i386/bits/huge_val.h +++ b/sysdeps/i386/bits/huge_val.h @@ -1,6 +1,6 @@ /* `HUGE_VAL' constants for ix86 (where it is infinity). Used by <stdlib.h> and <math.h> functions for overflow. - Copyright (C) 1992, 1995, 1996, 1997 Free Software Foundation, Inc. + Copyright (C) 1992, 1995, 1996, 1997, 1999 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 @@ -26,43 +26,56 @@ /* IEEE positive infinity (-HUGE_VAL is negative infinity). */ -#define __HUGE_VAL_bytes { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } +#if __GNUC_PREREQ(2,95) +# define HUGE_VAL (0x1.0p2047) +#else +# define __HUGE_VAL_bytes { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } -#define __huge_val_t union { unsigned char __c[8]; double __d; } -#ifdef __GNUC__ -# define HUGE_VAL (__extension__ \ +# 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. */ +# else /* Not GCC. */ static __huge_val_t __huge_val = { __HUGE_VAL_bytes }; -# define HUGE_VAL (__huge_val.__d) -#endif /* GCC. */ +# define HUGE_VAL (__huge_val.__d) +# endif /* GCC. */ +#endif /* GCC 2.95 */ /* ISO C 9X extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */ #ifdef __USE_ISOC9X -# define __HUGE_VALF_bytes { 0, 0, 0x80, 0x7f } +# if __GNUC_PREREQ(2,95) -# define __huge_valf_t union { unsigned char __c[4]; float __f; } -# ifdef __GNUC__ -# define HUGE_VALF (__extension__ \ +# define HUGE_VALF (0x1.0p255f) +# define HUGE_VALL (0x1.0p32767L) + +# else + +# define __HUGE_VALF_bytes { 0, 0, 0x80, 0x7f } + +# 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. */ +# else /* Not GCC. */ static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes }; -# define HUGE_VALF (__huge_valf.__f) -# endif /* GCC. */ +# define HUGE_VALF (__huge_valf.__f) +# endif /* GCC. */ -# define __HUGE_VALL_bytes { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f, 0, 0 } +# define __HUGE_VALL_bytes { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f, 0, 0 } -# define __huge_vall_t union { unsigned char __c[12]; long double __ld; } -# ifdef __GNUC__ -# define HUGE_VALL (__extension__ \ +# 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) -# else /* Not GCC. */ +# else /* Not GCC. */ static __huge_vall_t __huge_vall = { __HUGE_VALL_bytes }; -# define HUGE_VALL (__huge_vall.__ld) -# endif /* GCC. */ +# define HUGE_VALL (__huge_vall.__ld) +# endif /* GCC. */ + +# endif /* GCC 2.95 */ #endif /* __USE_ISOC9X. */ |