COMPMID-412: Port PoolingLayer to use fixed point 16.

Change-Id: I2005de4c7c14526996309826d33a0ec8e732d2d5
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/78720
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Steven Niu <steven.niu@arm.com>
diff --git a/arm_compute/core/FixedPoint.h b/arm_compute/core/FixedPoint.h
index f166d93..82c2d33 100644
--- a/arm_compute/core/FixedPoint.h
+++ b/arm_compute/core/FixedPoint.h
@@ -40,6 +40,24 @@
  */
 qint8_t sqshl_qs8(qint8_t a, int shift);
 
+/** 8 bit fixed point scalar shift right
+ *
+ * @param[in] a     First 8 bit fixed point input
+ * @param[in] shift Shift amount (positive only values)
+ *
+ * @return The result of the 8 bit fixed point shift
+ */
+qint8_t sshr_qs8(qint8_t a, int shift);
+
+/** 16 bit fixed point scalar shift right
+ *
+ * @param[in] a     First 16 bit fixed point input
+ * @param[in] shift Shift amount (positive only values)
+ *
+ * @return The result of the 16 bit fixed point shift
+ */
+qint16_t sshr_qs16(qint16_t a, int shift);
+
 /** 16 bit fixed point scalar saturating shift left
  *
  * @param[in] a     First 16 bit fixed point input