[PATCH 2/3] Add left circular shift function

Max max.suraev at fairwaves.co
Mon Mar 17 19:03:49 UTC 2014


---
 include/osmocom/core/bits.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/osmocom/core/bits.h b/include/osmocom/core/bits.h
index b1f4ed6..98a42f9 100644
--- a/include/osmocom/core/bits.h
+++ b/include/osmocom/core/bits.h
@@ -76,6 +76,15 @@ uint32_t osmo_revbytebits_8(uint8_t x);
 /* \brief reverse the bits of each byte in a given buffer */
 void osmo_revbytebits_buf(uint8_t *buf, int len);
 
+/*! \brief left circular shift
+ *  \param[in] in The 16 bit unsigned integer to be rotated
+ *  \param[in] shift Number of bits to shift \a in to
+ */
+static inline uint16_t osmo_rol16(uint16_t in, unsigned shift)
+{
+	return (in << shift) | (in >> (16 - shift));
+}
+
 /*! @} */
 
 #endif /* _OSMO_BITS_H */
-- 
1.8.3.2





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