1 files changed, 76 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/aarch64/sfp-exceptions.c b/gcc-4.9/libgcc/config/aarch64/sfp-exceptions.c
new file mode 100644
index 000000000..f3a95e8ab
--- /dev/null
+++ b/gcc-4.9/libgcc/config/aarch64/sfp-exceptions.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2012-2014 Free Software Foundation, Inc.
+ *
+ * This file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 3, or (at your option) any
+ * later version.
+ *
+ * This file 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
+ * General Public License for more details.
+ *
+ * Under Section 7 of GPL version 3, you are granted additional
+ * permissions described in the GCC Runtime Library Exception, version
+ * 3.1, as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License and
+ * a copy of the GCC Runtime Library Exception along with this program;
+ * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include "sfp-machine.h"
+
+void
+__sfp_handle_exceptions (int _fex)
+{
+  const float fp_max = __FLT_MAX__;
+  const float fp_min = __FLT_MIN__;
+  const float fp_1e32 = 1.0e32f;
+  const float fp_zero = 0.0;
+  const float fp_one = 1.0;
+  unsigned fpsr;
+
+  if (_fex & FP_EX_INVALID)
+    {
+      __asm__ __volatile__ ("fdiv\ts0, %s0, %s0"
+			    :
+			    : "w" (fp_zero)
+			    : "s0");
+      __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr));
+    }
+  if (_fex & FP_EX_DIVZERO)
+    {
+      __asm__ __volatile__ ("fdiv\ts0, %s0, %s1"
+			    :
+			    : "w" (fp_one), "w" (fp_zero)
+			    : "s0");
+      __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr));
+    }
+  if (_fex & FP_EX_OVERFLOW)
+    {
+      __asm__ __volatile__ ("fadd\ts0, %s0, %s1"
+			    :
+			    : "w" (fp_max), "w" (fp_1e32)
+			    : "s0");
+      __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr));
+    }
+  if (_fex & FP_EX_UNDERFLOW)
+    {
+      __asm__ __volatile__ ("fmul\ts0, %s0, %s0"
+			    :
+			    : "w" (fp_min)
+			    : "s0");
+      __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr));
+    }
+  if (_fex & FP_EX_INEXACT)
+    {
+      __asm__ __volatile__ ("fsub\ts0, %s0, %s1"
+			    :
+			    : "w" (fp_max), "w" (fp_one)
+			    : "s0");
+      __asm__ __volatile__ ("mrs\t%0, fpsr" : "=r" (fpsr));
+    }
+}