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diff --git a/tests/validation/reference/ComputeAllAnchors.cpp b/tests/validation/reference/ComputeAllAnchors.cpp
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+++ b/tests/validation/reference/ComputeAllAnchors.cpp
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+/*
+ * Copyright (c) 2019 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 "ComputeAllAnchors.h"
+
+#include "arm_compute/core/Types.h"
+#include "arm_compute/core/utils/misc/ShapeCalculator.h"
+#include "arm_compute/core/utils/misc/Utility.h"
+#include "tests/validation/Helpers.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+template <typename T>
+SimpleTensor<T> compute_all_anchors(const SimpleTensor<T> &anchors, const ComputeAnchorsInfo &info)
+{
+    const int   num_anchors = anchors.shape()[1];
+    const auto  width       = int(info.feat_width());
+    const auto  height      = int(info.feat_height());
+    const float stride      = 1. / info.spatial_scale();
+
+    SimpleTensor<T> all_anchors(TensorShape(4, width * height * num_anchors), anchors.data_type());
+    const T        *anchors_ptr     = anchors.data();
+    T              *all_anchors_ptr = all_anchors.data();
+
+    // Iterate over the input grid and anchors
+    for(int y = 0; y < height; y++)
+    {
+        for(int x = 0; x < width; x++)
+        {
+            for(int a = 0; a < num_anchors; a++)
+            {
+                const T      shift_x   = T(x) * T(stride);
+                const T      shift_y   = T(y) * T(stride);
+                const size_t anchor_id = a + x * num_anchors + y * width * num_anchors;
+                // x1
+                all_anchors_ptr[anchor_id * 4] = anchors_ptr[4 * a] + shift_x;
+                // y1
+                all_anchors_ptr[anchor_id * 4 + 1] = anchors_ptr[4 * a + 1] + shift_y;
+                // x2
+                all_anchors_ptr[anchor_id * 4 + 2] = anchors_ptr[4 * a + 2] + shift_x;
+                // y2
+                all_anchors_ptr[anchor_id * 4 + 3] = anchors_ptr[4 * a + 3] + shift_y;
+            }
+        }
+    }
+    return all_anchors;
+}
+template SimpleTensor<float> compute_all_anchors(const SimpleTensor<float> &anchors, const ComputeAnchorsInfo &info);
+template SimpleTensor<half> compute_all_anchors(const SimpleTensor<half> &anchors, const ComputeAnchorsInfo &info);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute