--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/os_cpu/solaris_x86/count_trailing_zeros_solaris_x86.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef OS_CPU_SOLARIS_X86_VM_COUNTTRAILINGZEROS_HPP
+#define OS_CPU_SOLARIS_X86_VM_COUNTTRAILINGZEROS_HPP
+
+#include "utilities/globalDefinitions.hpp"
+
+inline unsigned count_trailing_zeros(uintx x) {
+  assert(x != 0, "precondition");
+  uintx result;
+  __asm__(" rep bsfq %1, %0" : "=r" (result) : "rm" (x));
+  return result;
+}
+
+#endif // include guard