IEEE754 definitions for ARM.

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diff --git a/sysdeps/arm/ieee754.h b/sysdeps/arm/ieee754.h
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+/* Copyright (C) 1992, 1995, 1996, 1998 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 _IEEE754_H
+
+#define _IEEE754_H 1
+#include <features.h>
+
+#include <endian.h>
+
+__BEGIN_DECLS
+
+union ieee754_float
+  {
+    float f;
+
+    /* This is the IEEE 754 single-precision format.  */
+    struct
+      {
+	unsigned int mantissa:23;
+	unsigned int exponent:8;
+	unsigned int negative:1;
+      } ieee;
+
+    /* This format makes it easier to see if a NaN is a signalling NaN.  */
+    struct
+      {
+	unsigned int mantissa:22;
+	unsigned int quiet_nan:1;
+	unsigned int exponent:8;
+	unsigned int negative:1;
+      } ieee_nan;
+  };
+
+#define IEEE754_FLOAT_BIAS	0x7f /* Added to exponent.  */
+
+
+union ieee754_double
+  {
+    double d;
+
+    /* This is the IEEE 754 double-precision format.  */
+    struct
+      {
+	unsigned int mantissa0:20;
+	unsigned int exponent:11;
+	unsigned int negative:1;
+	unsigned int mantissa1:32;
+      } ieee;
+
+    /* This format makes it easier to see if a NaN is a signalling NaN.  */
+    struct
+      {
+	unsigned int mantissa0:19;
+	unsigned int quiet_nan:1;
+	unsigned int exponent:11;
+	unsigned int negative:1;
+	unsigned int mantissa1:32;
+      } ieee_nan;
+  };
+
+#define IEEE754_DOUBLE_BIAS	0x3ff /* Added to exponent.  */
+
+
+/* The following two structures are correct for `new' floating point systems but
+   wrong for the old FPPC.  The only solution seems to be to avoid their use on
+   old hardware.  */
+
+union ieee854_long_double
+  {
+    long double d;
+
+    /* This is the IEEE 854 double-extended-precision format.  */
+    struct
+      {
+	unsigned int exponent:15;
+	unsigned int empty:16;
+	unsigned int negative:1;
+	unsigned int mantissa1:32;
+	unsigned int mantissa0:32;
+      } ieee;
+
+    /* This is for NaNs in the IEEE 854 double-extended-precision format.  */
+    struct
+      {
+	unsigned int exponent:15;
+	unsigned int empty:16;
+	unsigned int negative:1;
+	unsigned int mantissa1:32;
+	unsigned int mantissa0:30;
+	unsigned int quiet_nan:1;
+	unsigned int one:1;
+      } ieee_nan;
+  };
+
+#define IEEE854_LONG_DOUBLE_BIAS 0x3fff
+
+__END_DECLS
+
+#endif /* ieee754.h */