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Diffstat (limited to 'arch/openrisc/include/asm/bitops/__ffs.h')
-rw-r--r--arch/openrisc/include/asm/bitops/__ffs.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/openrisc/include/asm/bitops/__ffs.h b/arch/openrisc/include/asm/bitops/__ffs.h
new file mode 100644
index 0000000..6c8368a
--- /dev/null
+++ b/arch/openrisc/include/asm/bitops/__ffs.h
@@ -0,0 +1,33 @@
+/*
+ * OpenRISC Linux
+ *
+ * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __ASM_OPENRISC___FFS_H
+#define __ASM_OPENRISC___FFS_H
+
+
+#ifdef CONFIG_OPENRISC_HAVE_INST_FF1
+
+static inline unsigned long __ffs(unsigned long x)
+{
+ int ret;
+
+ __asm__ ("l.ff1 %0,%1"
+ : "=r" (ret)
+ : "r" (x));
+
+ return ret-1;
+}
+
+#else
+#include <asm-generic/bitops/__ffs.h>
+#endif
+
+#endif /* __ASM_OPENRISC___FFS_H */