Move m68k from ports to libc

1 files changed, 82 insertions, 0 deletions

diff --git a/sysdeps/m68k/m680x0/fpu/fraiseexcpt.c b/sysdeps/m68k/m680x0/fpu/fraiseexcpt.c
new file mode 100644
index 0000000000..6e41b1425d
--- /dev/null
+++ b/sysdeps/m68k/m680x0/fpu/fraiseexcpt.c
@@ -0,0 +1,82 @@
+/* Raise given exceptions.
+   Copyright (C) 1997-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include <float.h>
+#include <math.h>
+
+int
+__feraiseexcept (int excepts)
+{
+  /* Raise exceptions represented by EXCEPTS.  But we must raise only one
+     signal at a time.  It is important that if the overflow/underflow
+     exception and the divide by zero exception are given at the same
+     time, the overflow/underflow exception follows the divide by zero
+     exception.  */
+
+  /* First: invalid exception.  */
+  if (excepts & FE_INVALID)
+    {
+      /* One example of an invalid operation is 0 * Infinity.  */
+      double d = HUGE_VAL;
+      __asm__ __volatile__ ("fmul%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d));
+    }
+
+  /* Next: division by zero.  */
+  if (excepts & FE_DIVBYZERO)
+    {
+      double d = 1.0;
+      __asm__ __volatile__ ("fdiv%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d));
+    }
+
+  /* Next: overflow.  */
+  if (excepts & FE_OVERFLOW)
+    {
+      long double d = LDBL_MAX;
+
+      __asm__ __volatile__ ("fmul%.x %0,%0; fnop" : "=f" (d) : "0" (d));
+    }
+
+  /* Next: underflow.  */
+  if (excepts & FE_UNDERFLOW)
+    {
+      long double d = -LDBL_MAX;
+
+      __asm__ __volatile__ ("fetox%.x %0; fnop" : "=f" (d) : "0" (d));
+    }
+
+  /* Last: inexact.  */
+  if (excepts & FE_INEXACT)
+    {
+      long double d = 1.0;
+      __asm__ __volatile__ ("fdiv%.s %#0r3,%0; fnop" : "=f" (d) : "0" (d));
+    }
+
+  /* Success.  */
+  return 0;
+}
+
+#include <shlib-compat.h>
+#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
+strong_alias (__feraiseexcept, __old_feraiseexcept)
+compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
+#endif
+
+libm_hidden_ver (__feraiseexcept, feraiseexcept)
+versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);