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60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* `NAN' constants for m68k.
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Copyright (C) 1997 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _NAN_H
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#define _NAN_H 1
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/* IEEE Not A Number. */
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#ifdef __GNUC__
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#define NAN \
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(__extension__ \
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((union { unsigned long long __l; double __d; }) \
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{ __l: 0x7fffffffffffffffULL }).__d)
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#define NANF \
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(__extension__ \
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((union { unsigned long __l; float __f; }) \
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{ __l: 0x7fffffffUL }).__f)
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#define NANL \
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(__extension__ \
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((union { unsigned long __l[3]; long double __ld; }) \
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{ __l: { 0x7fff0000UL, 0xffffffffUL, 0xffffffffUL } }).__ld)
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#else
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static union { unsigned char __c[8]; double __d; } __nan =
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{ { 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
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#define NAN (__nan.__d)
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static union { unsigned char __c[4]; float __f; } __nanf =
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{ { 0x7f, 0xff, 0xff, 0xff } };
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#define NANF (__nanf.__f)
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static union { unsigned char __c[12]; long double __ld; } __nanl =
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{ { 0x7f, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
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#define NANL (__nanl.__ld)
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#endif /* GCC. */
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#endif /* nan.h */
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