diff options
Diffstat (limited to 'sysdeps/s390/bits/huge_val.h')
| -rw-r--r-- | sysdeps/s390/bits/huge_val.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sysdeps/s390/bits/huge_val.h b/sysdeps/s390/bits/huge_val.h new file mode 100644 index 0000000000..252749b292 --- /dev/null +++ b/sysdeps/s390/bits/huge_val.h @@ -0,0 +1,69 @@ +/* `HUGE_VAL' constants for S/390 (where it is infinity). + Used by <stdlib.h> and <math.h> functions for overflow. + Copyright (C) 2000, 2001 Free Software Foundation, Inc. + Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). + 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. + + 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. + + 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. */ + +#ifndef _MATH_H +# error "Never use <bits/huge_val.h> directly; include <math.h> instead." +#endif + +#include <features.h> + +/* IEEE positive infinity (-HUGE_VAL is negative infinity). */ + +#if __GNUC_PREREQ(2,96) +# define HUGE_VAL (__extension__ 0x1.0p2047) +#else +# define __HUGE_VAL_bytes { 0x7f, 0xf0, 0, 0, 0, 0, 0, 0 } + +# 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. */ +#endif /* GCC 2.95 */ + + +/* ISO C 99 extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */ + +#ifdef __USE_ISOC99 + +# if __GNUC_PREREQ(2,96) +# define HUGE_VALF (__extension__ 0x1.0p255f) +# define HUGE_VALL (__extension__ 0x1.0p255f) +# else +# define __HUGE_VALF_bytes { 0x7f, 0x80, 0, 0 } +# 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. */ + +/* On 390 there is no 'long double' format. Make it the same as 'double' */ +# define HUGE_VALL HUGE_VAL + +# endif /* GCC 2.95 */ + +#endif /* __USE_ISOC99. */ |