1 files changed, 94 insertions, 0 deletions
diff --git a/sysdeps/ia64/fpu/fraiseexcpt.c b/sysdeps/ia64/fpu/fraiseexcpt.c
new file mode 100644
index 0000000000..78a881117e
--- /dev/null
+++ b/sysdeps/ia64/fpu/fraiseexcpt.c
@@ -0,0 +1,94 @@
+/* Raise given exceptions.
+   Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jes Sorensen <Jes.Sorensen@cern.ch>, 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.h>
+#include <math.h>
+#include <signal.h>
+#include <unistd.h>
+#include <asm/fpu.h>
+
+int
+feraiseexcept (int excepts)
+{
+  fenv_t fpsr;
+  double tmp;
+  double dummy;
+
+  /* Raise exceptions represented by EXPECTS.  But we must raise only
+     one signal at a time.  It is important the if the overflow/underflow
+     exception and the inexact exception are given at the same time,
+     the overflow/underflow exception precedes the inexact exception.  */
+
+  /* We do these bits in assembly to be certain GCC doesn't optimize
+     away something important.  */
+
+  /* First: invalid exception.  */
+  if (FE_INVALID & excepts)
+    {
+      /* One example of a invalid operation is 0 * Infinity.  */
+      tmp = 0;
+      __asm__ __volatile__ ("frcpa.s0 %0,p1=f0,f0" : "=f" (tmp) : : "p1" );
+    }
+
+  /* Next: division by zero.  */
+  if (FE_DIVBYZERO & excepts)
+    __asm__ __volatile__ ("frcpa.s0 %0,p1=f1,f0" : "=f" (tmp) : : "p1" );
+
+  /* XXX There seem to be no reliable way to generate
+     overflow/underflow exceptions without causing inexact exceptions
+     as well.  */
+  /* Next: overflow.  */
+  if (FE_OVERFLOW & excepts)
+    {
+      __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (fpsr));
+      fpsr |= (FE_OVERFLOW << 13);
+      __asm__ __volatile__ ("mov.m ar.fpsr=%0" : : "r" (fpsr));
+
+      if (!((unsigned long int) fpsr & FE_OVERFLOW))
+	{
+	  pid_t pid = getpid ();
+	  kill (pid, SIGFPE);
+	}
+    }
+
+  /* Next: underflow.  */
+  if (FE_UNDERFLOW & excepts)
+    {
+      __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (fpsr));
+      fpsr |= (FE_UNDERFLOW << 13);
+      __asm__ __volatile__ ("mov.m ar.fpsr=%0" : : "r" (fpsr));
+
+      if (!((unsigned long int) fpsr & FE_UNDERFLOW))
+	{
+	  pid_t pid = getpid();
+	  kill (pid, SIGFPE);
+	}
+  }
+
+  /* Last: inexact.  */
+  if (FE_INEXACT & excepts)
+    {
+      dummy = DBL_MAX;
+      __asm__ __volatile__ ("fadd.d.s0 %0=%1,f1" : "=f" (dummy) : "0" (dummy));
+    }
+
+  /* Success.  */
+  return 0;
+}