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diff --git a/tests/validation/reference/Permute.cpp b/tests/validation/reference/Permute.cpp
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+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "Permute.h"
+
+#include "arm_compute/core/Types.h"
+#include "tests/validation/Helpers.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+template <typename T>
+SimpleTensor<T> permute(const SimpleTensor<T> &src, PermutationVector perm)
+{
+    // Permute shapes
+    TensorShape dst_shape = src.shape();
+    permute(dst_shape, perm);
+
+    // Create reference
+    SimpleTensor<T> dst{ dst_shape, src.data_type() };
+
+    // Compute reference
+    for(int i = 0; i < src.num_elements(); ++i)
+    {
+        Coordinates coord = index2coord(src.shape(), i);
+        permute(coord, perm);
+        const size_t dst_index = coord2index(dst.shape(), coord);
+
+        dst[dst_index] = src[i];
+    }
+
+    return dst;
+}
+
+template SimpleTensor<uint8_t> permute(const SimpleTensor<uint8_t> &src, PermutationVector perm);
+template SimpleTensor<uint16_t> permute(const SimpleTensor<uint16_t> &src, PermutationVector perm);
+template SimpleTensor<uint32_t> permute(const SimpleTensor<uint32_t> &src, PermutationVector perm);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute