2 files changed, 47 insertions, 0 deletions
diff --git a/gr-blocks/include/blocks/CMakeLists.txt b/gr-blocks/include/blocks/CMakeLists.txt
index 0459097b0..37790b7cf 100644
--- a/gr-blocks/include/blocks/CMakeLists.txt
+++ b/gr-blocks/include/blocks/CMakeLists.txt
@@ -89,6 +89,7 @@ add_custom_target(blocks_generated_includes DEPENDS
 install(FILES
     ${generated_includes}
     api.h
+    count_bits.h
     add_ff.h
     char_to_float.h
     char_to_short.h
diff --git a/gr-blocks/include/blocks/count_bits.h b/gr-blocks/include/blocks/count_bits.h
new file mode 100644
index 000000000..ceb882f67
--- /dev/null
+++ b/gr-blocks/include/blocks/count_bits.h
@@ -0,0 +1,46 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003,2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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.
+ *
+ * GNU Radio 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _GR_COUNT_BITS_H_
+#define _GR_COUNT_BITS_H_
+
+#include <blocks/api.h>
+
+namespace gr {
+  namespace blocks {
+
+    //! return number of set bits in the low  8 bits of x
+    BLOCKS_API unsigned int count_bits8(unsigned int x);	
+
+    //! return number of set bits in the low 16 bits of x
+    BLOCKS_API unsigned int count_bits16(unsigned int x);
+
+    //! return number of set bits in the low 32 bits of x
+    BLOCKS_API unsigned int count_bits32(unsigned int x);
+
+    //! return number of set bits in a 64-bit word
+    BLOCKS_API unsigned int count_bits64(unsigned long long int x);
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* _GR_COUNT_BITS_H_ */