--- /dev/null
+/*
+ * OpenRISC Linux
+ *
+ * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ASM_OPENRISC_FLS_H
+#define __ASM_OPENRISC_FLS_H
+
+static inline int fls(int x)
+{
+ int ret;
+
+ __asm__ ("l.fl1 %0,%1"
+ : "=r" (ret)
+ : "r" (x));
+
+ return ret;
+}
+
+#endif /* __ASM_OPENRISC_FLS_H */