1 files changed, 71 insertions, 0 deletions
diff --git a/sysdeps/s390/fpu/fraiseexcpt.c b/sysdeps/s390/fpu/fraiseexcpt.c
new file mode 100644
index 0000000000..e6c716cfc6
--- /dev/null
+++ b/sysdeps/s390/fpu/fraiseexcpt.c
@@ -0,0 +1,71 @@
+/* Raise given exceptions.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com) and
+   Martin Schwidefsky (schwidefsky@de.ibm.com).
+
+   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>
+#include <math.h>
+
+
+static __inline__ void
+fexceptdiv (float d, float e)
+{
+  __asm__ __volatile__ ("debr %0,%1" : : "f" (d), "f" (e) );
+}
+
+static __inline__ void
+fexceptadd (float d, float e)
+{
+  __asm__ __volatile__ ("aebr %0,%1" : : "f" (d), "f" (e) );
+}
+
+
+int
+feraiseexcept (int excepts)
+{
+  /* Raise exceptions represented by EXPECTS.  But we must raise only
+     one signal at a time.  It is important that if the overflow/underflow
+     exception and the inexact exception are given at the same time,
+     the overflow/underflow exception follows the inexact exception.  */
+
+  /* First: invalid exception.  */
+  if (FE_INVALID & excepts)
+    fexceptdiv (0.0, 0.0);
+
+  /* Next: division by zero.  */
+  if (FE_DIVBYZERO & excepts)
+    fexceptdiv (1.0, 0.0);
+
+  /* Next: overflow.  */
+  if (FE_OVERFLOW & excepts)
+    /* I don't think we can do the same trick as intel so we will have
+       to live with inexact coming also.  */
+    fexceptadd (FLT_MAX, 1.0e32);
+
+  /* Next: underflow.  */
+  if (FE_UNDERFLOW & excepts)
+    fexceptdiv (FLT_MIN, 3.0);
+
+  /* Last: inexact.  */
+  if (FE_INEXACT & excepts)
+    fexceptdiv (2.0, 3.0);
+
+  /* Success.  */
+  return 0;
+}