[thirdparty/glibc.git] / ports / sysdeps / m68k / m680x0 / bits / huge_vall.h

/* `HUGE_VALL' constant for m68k (where it is infinity).
   Used by <stdlib.h> and <math.h> functions for overflow.
   Copyright (C) 1992-2014 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_val.h> directly; include <math.h> instead."
#endif

#if __GNUC_PREREQ(3,3)
# define HUGE_VALL	(__builtin_huge_vall ())
#elif __GNUC_PREREQ(2,96)
# define HUGE_VALL	(__extension__ 0x1.0p32767L)
#elif defined__GNUC__

# define HUGE_VALL					\
  (__extension__					\
   ((union { unsigned long __l[3]; long double __ld; })	\
    { __l: { 0x7fff0000UL, 0x80000000UL, 0UL } }).__ld)

#else /* not GCC */

static union { unsigned char __c[12]; long double __ld; } __huge_vall =
  { { 0x7f, 0xff, 0, 0, 0x80, 0, 0, 0, 0, 0, 0, 0 } };
# define HUGE_VALL	(__huge_vall.__ld)

#endif /* GCC 2.95.  */
Commit	Line	Data
154a5429 RH	1	/* `HUGE_VALL' constant for m68k (where it is infinity).
154a5429 RH	2	Used by <stdlib.h> and <math.h> functions for overflow.
d4697bc9	3	Copyright (C) 1992-2014 Free Software Foundation, Inc.
154a5429 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
ab84e3ff PE	17	License along with the GNU C Library. If not, see
ab84e3ff PE	18	<http://www.gnu.org/licenses/>. */
154a5429 RH	19
	20	#ifndef _MATH_H
	21	# error "Never use <bits/huge_val.h> directly; include <math.h> instead."
	22	#endif
	23
	24	#if __GNUC_PREREQ(3,3)
	25	# define HUGE_VALL (__builtin_huge_vall ())
	26	#elif __GNUC_PREREQ(2,96)
	27	# define HUGE_VALL (__extension__ 0x1.0p32767L)
	28	#elif defined__GNUC__
	29
	30	# define HUGE_VALL \
	31	(__extension__ \
	32	((union { unsigned long __l[3]; long double __ld; }) \
	33	{ __l: { 0x7fff0000UL, 0x80000000UL, 0UL } }).__ld)
	34
	35	#else /* not GCC */
	36
	37	static union { unsigned char __c[12]; long double __ld; } __huge_vall =
	38	{ { 0x7f, 0xff, 0, 0, 0x80, 0, 0, 0, 0, 0, 0, 0 } };
	39	# define HUGE_VALL (__huge_vall.__ld)
	40
	41	#endif /* GCC 2.95. */