[thirdparty/glibc.git] / sysdeps / sparc / bits / huge_vall.h

/* `HUGE_VALL' constant for IEEE 754 machines (where it is infinity).
   Used by <stdlib.h> and <math.h> functions for overflow.
   Copyright (C) 1992-2017 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 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _MATH_H
# error "Never use <bits/huge_vall.h> directly; include <math.h> instead."
#endif

#if __GNUC_PREREQ(3,3)
# define HUGE_VALL	(__builtin_huge_vall())
#else
# include <bits/wordsize.h>
# if __WORDSIZE == 32
#  define HUGE_VALL	((long double) HUGE_VAL)
# elif __GNUC_PREREQ(2,96)
#   define HUGE_VALL	(__extension__ 0x1.0p32767L)
# elif defined __GNUC__

#   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 /* GCC 3.3.  */
Commit	Line	Data
a86573f4 RH	1	/* `HUGE_VALL' constant for IEEE 754 machines (where it is infinity).
a86573f4 RH	2	Used by <stdlib.h> and <math.h> functions for overflow.
bfff8b1b	3	Copyright (C) 1992-2017 Free Software Foundation, Inc.
a86573f4 RH	4	This file is part of the GNU C Library.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	17	License along with the GNU C Library; if not, see
59ba27a6 PE	18	<http://www.gnu.org/licenses/>. */
a86573f4 RH	19
	20	#ifndef _MATH_H
	21	# error "Never use <bits/huge_vall.h> directly; include <math.h> instead."
	22	#endif
	23
	24	#if __GNUC_PREREQ(3,3)
	25	# define HUGE_VALL (__builtin_huge_vall())
	26	#else
	27	# include <bits/wordsize.h>
	28	# if __WORDSIZE == 32
	29	# define HUGE_VALL ((long double) HUGE_VAL)
	30	# elif __GNUC_PREREQ(2,96)
	31	# define HUGE_VALL (__extension__ 0x1.0p32767L)
	32	# elif defined __GNUC__
	33
	34	# define HUGE_VALL \
	35	(__extension__ \
	36	((union { struct { unsigned long __h, __l; } __i; long double __d; }) \
	37	{ __i: { __h: 0x7fff000000000000UL, __l: 0 } }).__d)
	38
	39	# else /* not GCC */
	40
	41	typedef union { unsigned char __c[16]; long double __d; } __huge_vall_t;
	42	# define __HUGE_VALL_bytes { 0x7f, 0xff, 0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
	43	static __huge_vall_t __huge_vall = { __HUGE_VALL_bytes };
	44	# define HUGE_VALL (__huge_vall.__d)
	45
	46	# endif /* GCC. */
	47	#endif /* GCC 3.3. */