1 files changed, 42 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/nios2/lib2-mul.c b/gcc-4.9/libgcc/config/nios2/lib2-mul.c
new file mode 100644
index 000000000..2852727fa
--- /dev/null
+++ b/gcc-4.9/libgcc/config/nios2/lib2-mul.c
@@ -0,0 +1,42 @@
+/* Copyright (C) 2012-2014 Free Software Foundation, Inc.
+   Contributed by Altera and Mentor Graphics, 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 "lib2-nios2.h"
+
+/* 32-bit SI multiply for Nios II.  */
+
+SItype
+__mulsi3 (SItype a, SItype b)
+{
+  SItype res = 0;
+  USItype cnt = a;
+  
+  while (cnt)
+    {
+      if (cnt & 1)
+	res += b;	  
+      b <<= 1;
+      cnt >>= 1;
+    }
+    
+  return res;
+}