COMPMID-3152: Initial Bfloat16 support

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: Ie6959e37e13731c86b2ee29392a99a293450a1b4
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/2824
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
diff --git a/tests/validation/Helpers.cpp b/tests/validation/Helpers.cpp
index afefee7..4da9742 100644
--- a/tests/validation/Helpers.cpp
+++ b/tests/validation/Helpers.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 ARM Limited.
+ * Copyright (c) 2017-2020 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -212,6 +212,18 @@
     return dst;
 }
 
+SimpleTensor<float> convert_from_bfloat16(const SimpleTensor<int16_t> &src)
+{
+    SimpleTensor<float> dst{ src.shape(), DataType::F32, 1, QuantizationInfo(), src.data_layout() };
+    return dst;
+}
+
+SimpleTensor<int16_t> convert_to_bfloat(const SimpleTensor<float> &src)
+{
+    SimpleTensor<int16_t> dst{ src.shape(), DataType::BFLOAT16, 1, QuantizationInfo(), src.data_layout() };
+    return dst;
+}
+
 template <typename T>
 void matrix_multiply(const SimpleTensor<T> &a, const SimpleTensor<T> &b, SimpleTensor<T> &out)
 {