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[PATCH] PPC64 fe_nomask.c
- From: Steven Munroe <sjmunroe at us dot ibm dot com>
- To: libc-alpha at sources dot redhat dot com
- Date: Fri, 24 Jan 2003 15:38:30 -0600
- Subject: [PATCH] PPC64 fe_nomask.c
- Organization: IBM Linux Developement
- Reply-to: sjmunroe at vnet dot ibm dot com
The implementation of fe_nomask we inherited from ppc32 (using a signal
handler to modify the FE0/FE1 bits in the MSR and return) has been
broken for some time.
Paul Mackerras added options to the prctl syscall to get/set the FE bits
to the 2.5 kernel. The PPC64 team backported the prctl code to the
2.4.21 kernel so now I can safely fix this in the glibc code.
2003-01-24 Steven Munroe <sjmunroe@us.ibm.com>
* sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c: New
file.
--
Steven Munroe
sjmunroe@us.ibm.com
Linux on PowerPC-64 Development
GLIBC for PowerPC-64 Development
diff -urN libc23-cvstip-20030124/sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c
--- libc23-cvstip-20030124/sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c Wed Dec 31 18:00:00 1969
+++ libc23/sysdeps/unix/sysv/linux/powerpc/powerpc64/fe_nomask.c Fri Jan 24 14:03:56 2003
@@ -0,0 +1,30 @@
+/* Procedure definition for FE_NOMASK_ENV for Linux/ppc.
+ Copyright (C) 2003 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>
+#include <sys/prctl.h>
+
+const fenv_t *
+__fe_nomask_env(void)
+{
+ prctl(PR_SET_FPEXC, PR_FP_EXC_PRECISE);
+
+ return FE_ENABLED_ENV;
+}