* sysdeps/powerpc/fpu/fedisblxcpt.c: New file.

* sysdeps/powerpc/fpu/feenablxcpt.c: New file. 
* sysdeps/powerpc/fpu/fegetexcept.c: New file. 
* sysdeps/unix/sysv/linux/powerpc/fe_nomask.c: New file.
2000-08-27  Geoff Keating  <geoffk@cygnus.com>

	* sysdeps/powerpc/fpu/fedisblxcpt.c: New file.
	* sysdeps/powerpc/fpu/feenablxcpt.c: New file.
	* sysdeps/powerpc/fpu/fegetexcept.c: New file.
	* sysdeps/unix/sysv/linux/powerpc/fe_nomask.c: New file.

4 files changed, 199 insertions, 0 deletions

diff --git a/sysdeps/powerpc/fpu/fedisblxcpt.c b/sysdeps/powerpc/fpu/fedisblxcpt.c
new file mode 100644
index 0000000000..271fc081ec
--- /dev/null
+++ b/sysdeps/powerpc/fpu/fedisblxcpt.c
@@ -0,0 +1,50 @@
+/* Disable floating-point exceptions.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Geoffrey Keating <geoffk@geoffk.org>, 2000.
+
+   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.  */
+
+#include <fenv_libc.h>
+
+int
+fedisableexcept (int excepts)
+{
+  fenv_union_t fe;
+  int result;
+
+  result = fegetexcept ();
+
+  if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID)
+    excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID;
+
+  fe.fenv = fegetenv_register ();
+  if (excepts & FE_INEXACT)
+    fe.l[1] &= ~(1 << (31 - FPSCR_XE));
+  if (excepts & FE_DIVBYZERO)
+    fe.l[1] &= ~(1 << (31 - FPSCR_ZE));
+  if (excepts & FE_UNDERFLOW)
+    fe.l[1] &= ~(1 << (31 - FPSCR_UE));
+  if (excepts & FE_OVERFLOW)
+    fe.l[1] &= ~(1 << (31 - FPSCR_OE));
+  if (excepts & FE_INVALID)
+    fe.l[1] &= ~(1 << (31 - FPSCR_VE));
+  fesetenv_register (fe.fenv);
+
+  if ((fegetexcept () & excepts) != 0)
+    result = -1;
+  return result;
+}
diff --git a/sysdeps/powerpc/fpu/feenablxcpt.c b/sysdeps/powerpc/fpu/feenablxcpt.c
new file mode 100644
index 0000000000..1d426e8a78
--- /dev/null
+++ b/sysdeps/powerpc/fpu/feenablxcpt.c
@@ -0,0 +1,55 @@
+/* Enable floating-point exceptions.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Geoffrey Keating <geoffk@geoffk.org>, 2000.
+
+   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.  */
+
+#include <fenv_libc.h>
+
+int
+feenableexcept (int excepts)
+{
+  fenv_union_t fe;
+  int result, new;
+
+  result = fegetexcept ();
+
+  if ((excepts & FE_ALL_INVALID) == FE_ALL_INVALID)
+    excepts = (excepts | FE_INVALID) & ~ FE_ALL_INVALID;
+
+  fe.fenv = fegetenv_register ();
+  if (excepts & FE_INEXACT)
+    fe.l[1] |= (1 << (31 - FPSCR_XE));
+  if (excepts & FE_DIVBYZERO)
+    fe.l[1] |= (1 << (31 - FPSCR_ZE));
+  if (excepts & FE_UNDERFLOW)
+    fe.l[1] |= (1 << (31 - FPSCR_UE));
+  if (excepts & FE_OVERFLOW)
+    fe.l[1] |= (1 << (31 - FPSCR_OE));
+  if (excepts & FE_INVALID)
+    fe.l[1] |= (1 << (31 - FPSCR_VE));
+  fesetenv_register (fe.fenv);
+
+  new = fegetexcept ();
+  if (new != 0 && result == 0)
+    (void)__fe_nomask_env (void);
+
+  if ((old & excepts) != excepts)
+    result = -1;
+
+  return result;
+}
diff --git a/sysdeps/powerpc/fpu/fegetexcept.c b/sysdeps/powerpc/fpu/fegetexcept.c
new file mode 100644
index 0000000000..13699b517f
--- /dev/null
+++ b/sysdeps/powerpc/fpu/fegetexcept.c
@@ -0,0 +1,43 @@
+/* Get floating-point exceptions.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Geoffrey Keating <geoffk@geoffk.org>, 2000.
+
+   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.  */
+
+#include <fenv_libc.h>
+
+int
+fegetexcept (void)
+{
+  fenv_union_t fe;
+  int result = 0;
+
+  fe.fenv = fegetenv_register ();
+ 
+  if (fe.l[1] & (1 << (31 - FPSCR_XE)))
+      result |= FE_INEXACT;
+  if (fe.l[1] & (1 << (31 - FPSCR_ZE)))
+      result |= FE_DIVBYZERO;
+  if (fe.l[1] & (1 << (31 - FPSCR_UE)))
+      result |= FE_UNDERFLOW;
+  if (fe.l[1] & (1 << (31 - FPSCR_OE)))
+      result |= FE_OVERFLOW;
+  if (fe.l[1] & (1 << (31 - FPSCR_VE)))
+      result |= FE_INVALID;
+
+  return result;
+}
diff --git a/sysdeps/unix/sysv/linux/powerpc/fe_nomask.c b/sysdeps/unix/sysv/linux/powerpc/fe_nomask.c
new file mode 100644
index 0000000000..ceed2454f1
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/fe_nomask.c
@@ -0,0 +1,51 @@
+/* Procedure definition for FE_NOMASK_ENV for Linux/ppc.
+   Copyright (C) 2000 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.  */
+
+#include <fenv.h>
+#include <errno.h>
+#include <signal.h>
+#include <unistd.h>
+
+/* This is rather fiddly under Linux.  We don't have direct access,
+   and there is no system call, but we can change the bits 
+   in a signal handler's context...  */
+
+static struct sigaction oact;
+
+static void
+fe_nomask_handler (int signum, struct sigcontext *sc)
+{
+  sc->regs->msr |= 0x900ul;  /* FE0 | FE1 */
+  sigaction (SIGUSR1, &oact, NULL);
+}
+
+const fenv_t *
+__fe_nomask_env(void)
+{
+  struct sigaction act;
+
+  act.sa_handler = (sighandler_t) fe_nomask_handler;
+  sigemptyset (&act.sa_mask);
+  act.sa_flags = 0;
+
+  sigaction (SIGUSR1, &act, &oact);
+  raise (SIGUSR1);
+
+  return FE_ENABLED_ENV;
+}