diff options
Diffstat (limited to 'libc/sysdeps/linux/sparc/bits/huge_val.h')
| -rw-r--r-- | libc/sysdeps/linux/sparc/bits/huge_val.h | 103 |
1 files changed, 69 insertions, 34 deletions
diff --git a/libc/sysdeps/linux/sparc/bits/huge_val.h b/libc/sysdeps/linux/sparc/bits/huge_val.h index f49d65661..2cc3c10b2 100644 --- a/libc/sysdeps/linux/sparc/bits/huge_val.h +++ b/libc/sysdeps/linux/sparc/bits/huge_val.h @@ -1,50 +1,52 @@ /* `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, 1997 Free Software Foundation, Inc. + Copyright (C) 1992, 1995, 1996, 1997, 1999, 2000 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 - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. + Lesser General Public License for more details. - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ #ifndef _MATH_H # error "Never use <bits/huge_val.h> directly; include <math.h> instead." #endif #include <features.h> +#include <bits/wordsize.h> /* IEEE positive infinity (-HUGE_VAL is negative infinity). */ #ifdef __GNUC__ -# define HUGE_VAL \ +# if __GNUC_PREREQ(2,96) + +# define HUGE_VAL (__extension__ 0x1.0p2047) + +# else + +# define HUGE_VAL \ (__extension__ \ ((union { unsigned __l __attribute__((__mode__(__DI__))); double __d; }) \ { __l: 0x7ff0000000000000ULL }).__d) -#else /* not GCC */ +# endif -# include <endian.h> +#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 -# if __BYTE_ORDER == __LITTLE_ENDIAN -# define __HUGE_VAL_bytes { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } -# endif +# define __HUGE_VAL_bytes { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 } static __huge_val_t __huge_val = { __HUGE_VAL_bytes }; # define HUGE_VAL (__huge_val.__d) @@ -52,36 +54,69 @@ static __huge_val_t __huge_val = { __HUGE_VAL_bytes }; #endif /* GCC. */ -/* ISO C 9X extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */ +/* ISO C99 extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */ + +#ifdef __USE_ISOC99 + +# if __GNUC_PREREQ(2,96) -#ifdef __USE_ISOC9X +# define HUGE_VALF (__extension__ 0x1.0p255f) +# if __WORDSIZE == 32 +# define HUGE_VALL HUGE_VAL +# else +/* Sparc64 uses IEEE 754 128bit long double */ +# define HUGE_VALL (__extension__ 0x1.0p32767L) +# endif + +# else -# ifdef __GNUC__ +# ifdef __GNUC__ -# define HUGE_VALF \ +# define HUGE_VALF \ (__extension__ \ ((union { unsigned __l __attribute__((__mode__(__SI__))); float __d; }) \ { __l: 0x7f800000UL }).__d) -# else /* not GCC */ +# 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 -# if __BYTE_ORDER == __LITTLE_ENDIAN -# define __HUGE_VALF_bytes { 0, 0, 0x80, 0x7f } -# endif static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes }; -# define HUGE_VALF (__huge_valf.__f) +# define HUGE_VALF (__huge_valf.__f) + +# endif /* GCC. */ + +# if __WORDSIZE == 32 + +/* Sparc32 has IEEE 754 64bit long double */ +# define HUGE_VALL HUGE_VAL + +# else + +/* Sparc64 uses IEEE 754 128bit long double */ + +# ifdef __GNUC__ -# endif /* GCC. */ +# define HUGE_VALL \ + (__extension__ \ + ((union { struct { unsigned long __h, __l; } __i; long double __d; }) \ + { __i: { __h: 0x7fff000000000000UL, __l: 0 } }).__d) +# else /* not GCC */ + +typedef union { unsigned char __c[16]; long double __d; } __huge_vall_t; + +# define __HUGE_VALL_bytes { 0x7f, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } + +static __huge_vall_t __huge_vall = { __HUGE_VALL_bytes }; +# define HUGE_VALL (__huge_vall.__d) + +# endif /* GCC. */ + +# endif -/* Generally there is no separate `long double' format and it is the - same as `double'. */ -# define HUGE_VALL HUGE_VAL +# endif /* GCC 2.95. */ -#endif /* __USE_ISOC9X. */ +#endif /* __USE_ISOC99. */ |