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-rw-r--r--include/osmocom/core/bits.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/osmocom/core/bits.h b/include/osmocom/core/bits.h
index f3045e47..1587b050 100644
--- a/include/osmocom/core/bits.h
+++ b/include/osmocom/core/bits.h
@@ -77,4 +77,14 @@ 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, [0;16] bits
+ * \returns shifted value
+ */
+static inline uint16_t osmo_rol16(uint16_t in, unsigned shift)
+{
+ return (in << shift) | (in >> (16 - shift));
+}
+
/*! @} */