[patches] Implement feupdateenv for ARM EABI

["Joseph S. Myers" <joseph@xxxxxxxxxxxxxxxx>]

I've applied to trunk and 2.8 branch this patch to implement 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.)

Index: sysdeps/arm/eabi/feupdateenv.c
===================================================================
--- sysdeps/arm/eabi/feupdateenv.c	(revision 0)
+++ sysdeps/arm/eabi/feupdateenv.c	(revision 0)
@@ -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@xxxxxxxxxx>, 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);
Index: ChangeLog.eglibc
===================================================================
--- ChangeLog.eglibc	(revision 6382)
+++ ChangeLog.eglibc	(working copy)
@@ -1,5 +1,9 @@
 2008-06-17  Joseph Myers  <joseph@xxxxxxxxxxxxxxxx>
 
+	* sysdeps/arm/eabi/feupdateenv.c: New.
+
+2008-06-17  Joseph Myers  <joseph@xxxxxxxxxxxxxxxx>
+
 	* sysdeps/arm/libm-test-ulps: Update.
 
 2008-04-11  Paul Brook  <paul@xxxxxxxxxxxxxxxx>

-- 
Joseph S. Myers
joseph@xxxxxxxxxxxxxxxx