COMPMID-355 Implement CL DirectConvolution1x1

* Add FP16 to validation tests.
* Complete benchmark tests for CL and NEON Direct Convolution.

Change-Id: Ie73d8580832372db01b82b39786fd9c8be560090
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/82014
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
diff --git a/src/core/CL/CLHelpers.cpp b/src/core/CL/CLHelpers.cpp
index 1073b39..1c855e4 100644
--- a/src/core/CL/CLHelpers.cpp
+++ b/src/core/CL/CLHelpers.cpp
@@ -100,6 +100,32 @@
     }
 }
 
+std::string get_data_size_from_data_type(const DataType &dt)
+{
+    switch(dt)
+    {
+        case DataType::U8:
+        case DataType::QS8:
+        case DataType::S8:
+            return "8";
+        case DataType::U16:
+        case DataType::S16:
+        case DataType::QS16:
+        case DataType::F16:
+            return "16";
+        case DataType::U32:
+        case DataType::S32:
+        case DataType::F32:
+            return "32";
+        case DataType::U64:
+        case DataType::S64:
+            return "64";
+        default:
+            ARM_COMPUTE_ERROR("Unsupported input data type.");
+            return "0";
+    }
+}
+
 std::string get_underlying_cl_type_from_data_type(const DataType &dt)
 {
     switch(dt)