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42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
/* `HUGE_VALL' constant for m68k (where it is infinity).
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Used by <stdlib.h> and <math.h> functions for overflow.
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Copyright (C) 1992-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _MATH_H
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# error "Never use <bits/huge_val.h> directly; include <math.h> instead."
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#endif
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#if __GNUC_PREREQ(3,3)
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# define HUGE_VALL (__builtin_huge_vall ())
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#elif __GNUC_PREREQ(2,96)
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# define HUGE_VALL (__extension__ 0x1.0p32767L)
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#elif defined__GNUC__
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# define HUGE_VALL \
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(__extension__ \
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((union { unsigned long __l[3]; long double __ld; }) \
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{ __l: { 0x7fff0000UL, 0x80000000UL, 0UL } }).__ld)
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#else /* not GCC */
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static union { unsigned char __c[12]; long double __ld; } __huge_vall =
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{ { 0x7f, 0xff, 0, 0, 0x80, 0, 0, 0, 0, 0, 0, 0 } };
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# define HUGE_VALL (__huge_vall.__ld)
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#endif /* GCC 2.95. */
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