2007-04-30 Steven Munroe <sjmunroe@us.ibm.com>

            Peter Bergner  <bergner@us.ibm.com>

	* sysdeps/powerpc/bits/fenv.h: Declare __fe_mask_env extern.
	Define FE_NOMASK_ENV as FE_EANBLED_ENV.  Define FE_MASK_ENV.
	* sysdeps/powerpc/fpu/Makefile: Add fe_mask to libm-support.
	* sysdeps/powerpc/fpu/fe_mask.c: New file.
	* sysdeps/powerpc/fpu/fe_nomask.c: Correct comment.
	* sysdeps/powerpc/fpu/fedisblxcpt.c (fedisableexcept):
	Call __fe_mask_env() if all FP exceptions disabled.
	* sysdeps/powerpc/fpu/feholdexcpt.c (feholdexcept): Copy high 32-bits
	from old FPSCR to new fenv to propagate DFP rounding modes.
	Call __fe_mask_env() if FP exceptions previously enabled.
	* sysdeps/powerpc/fpu/fesetenv.c (fesetenv): Change mask to merge
	exceptions from env.  Use __fe_nomask_env() or __fe_mask_env() when
	transitioning from all exceptions disabled to any exception enabled
	or visa versa.
	* sysdeps/powerpc/fpu/feupdateenv.c (__feupdateenv): Change mask to
	merge exceptions from env.  Call __fe_nomask_env or __fe_mask_env
	when transitioning from all exceptions disabled to any exception
	enabled or visa versa.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fe_nomask.c: Moved to...
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/fe_nomask.c: ...here.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c: Moved to...
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_nomask.c: ...here.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/fe_mask.c: New file.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_mask.c: New file.

1 files changed, 33 insertions, 0 deletions

diff --git a/sysdeps/powerpc/fpu/fe_mask.c b/sysdeps/powerpc/fpu/fe_mask.c
new file mode 100644
index 0000000000..d7ee5551ff
--- /dev/null
+++ b/sysdeps/powerpc/fpu/fe_mask.c
@@ -0,0 +1,33 @@
+/* Procedure definition for FE_MASK_ENV.
+   Copyright (C) 2007 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 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 <errno.h>
+
+/* This is a generic stub. An OS specific override is required to clear
+   the FE0/FE1 bits in the MSR.  MSR update is privileged, so this will
+   normally involve a syscall.  */
+
+const fenv_t *
+__fe_mask_env(void)
+{
+  __set_errno (ENOSYS);
+  return FE_DFL_ENV;
+}
+stub_warning (__fe_mask_env)