m68k specific NaN value definitions.

sysdeps/m68k/nan.h

@@ -0,0 +1,59 @@
+/* `NAN' constants for m68k.
+   Copyright (C) 1997 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 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	_NAN_H
+
+#define	_NAN_H	1
+
+/* IEEE Not A Number.  */
+
+#ifdef	__GNUC__
+
+#define NAN							\
+  (__extension__						\
+   ((union { unsigned long long __l; double __d; })		\
+    { __l: 0x7fffffffffffffffULL }).__d)
+
+#define NANF							\
+  (__extension__						\
+   ((union { unsigned long __l; float __f; })			\
+    { __l: 0x7fffffffUL }).__f)
+
+#define NANL							\
+  (__extension__						\
+   ((union { unsigned long __l[3]; long double __ld; })		\
+    { __l: { 0x7fff0000UL, 0xffffffffUL, 0xffffffffUL } }).__ld)
+
+#else
+
+static union { unsigned char __c[8]; double __d; } __nan =
+  { { 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
+#define	NAN	(__nan.__d)
+
+static union { unsigned char __c[4]; float __f; } __nanf =
+  { { 0x7f, 0xff, 0xff, 0xff } };
+#define	NANF	(__nanf.__f)
+
+static union { unsigned char __c[12]; long double __ld; } __nanl =
+  { { 0x7f, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
+#define	NANL	(__nanl.__ld)
+
+#endif	/* GCC.  */
+
+#endif	/* nan.h */