Implement feupdateenv for ARM EABI

["Joseph S. Myers" <joseph at codesourcery dot com>]

This patch implements feupdateenv for ARM EABI, so fixing the test-fenv 
failure for VFP hardware.  (This replaces use of the generic version that 
always fails, so has the same symbol version handling as that version.)

2008-06-17  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/arm/eabi/feupdateenv.c: New.

diff -rupN ports.orig/sysdeps/arm/eabi/feupdateenv.c ports/sysdeps/arm/eabi/feupdateenv.c
--- ports.orig/sysdeps/arm/eabi/feupdateenv.c	1970-01-01 00:00:00.000000000 +0000
+++ ports/sysdeps/arm/eabi/feupdateenv.c	2008-06-17 23:01:01.000000000 +0000
@@ -0,0 +1,59 @@
+/* Install given floating-point environment and raise exceptions.
+   Copyright (C) 1997, 1999, 2000, 2008 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+#include <unistd.h>
+#include <ldsodefs.h>
+#include <dl-procinfo.h>
+#include <sysdep.h>
+
+int
+__feupdateenv (const fenv_t *envp)
+{
+  if (GLRO (dl_hwcap) & HWCAP_ARM_VFP)
+    {
+      unsigned int temp;
+
+      /* Get the current exception state.  */
+      _FPU_GETCW (temp);
+
+      /* Install new environment.  */
+      fesetenv (envp);
+
+      /* Raise the saved exceptions.  */
+      feraiseexcept (temp & FE_ALL_EXCEPT);
+
+      /* Success.  */
+      return 0;
+    }
+
+  /* Unsupported, so fail.  */
+  return 1;
+}
+
+#include <shlib-compat.h>
+#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
+strong_alias (__feupdateenv, __old_feupdateenv)
+compat_symbol (libm, __old_feupdateenv, feupdateenv, GLIBC_2_1);
+#endif
+
+versioned_symbol (libm, __feupdateenv, feupdateenv, GLIBC_2_2);

-- 
Joseph S. Myers
joseph@codesourcery.com