COMPMID-1723: CL: Implement Reverse

Change-Id: Id0d4a07af24e2331161996083b0c1bab072bd405
Reviewed-on: https://review.mlplatform.org/322
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/tests/validation/reference/Reverse.cpp b/tests/validation/reference/Reverse.cpp
new file mode 100644
index 0000000000..1662dc24a0
--- /dev/null
+++ b/tests/validation/reference/Reverse.cpp
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2018 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 "Reverse.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> reverse(const SimpleTensor<T> &src, const SimpleTensor<uint32_t> &axis)
+{
+    ARM_COMPUTE_ERROR_ON(axis.shape().num_dimensions() > 1);
+    ARM_COMPUTE_ERROR_ON(axis.shape().x() > 4);
+
+    // Create reference
+    SimpleTensor<T> dst{ src.shape(), src.data_type(), src.num_channels(), src.quantization_info() };
+
+    const unsigned int width   = src.shape()[0];
+    const unsigned int height  = src.shape()[1];
+    const unsigned int depth   = src.shape()[2];
+    const unsigned int batches = src.shape()[3];
+
+    std::array<bool, 4> to_reverse = { { false, false, false, false } };
+    for(int i = 0; i < axis.num_elements(); ++i)
+    {
+        to_reverse[axis[i]] = true;
+    }
+
+    for(int i = 0; i < src.num_elements(); ++i)
+    {
+        const Coordinates  src_coord = index2coord(src.shape(), i);
+        const unsigned int dst_x     = to_reverse[0] ? width - src_coord[0] - 1 : src_coord[0];
+        const unsigned int dst_y     = to_reverse[1] ? height - src_coord[1] - 1 : src_coord[1];
+        const unsigned int dst_z     = to_reverse[2] ? depth - src_coord[2] - 1 : src_coord[2];
+        const unsigned int dst_w     = to_reverse[3] ? batches - src_coord[3] - 1 : src_coord[3];
+
+        dst[coord2index(src.shape(), Coordinates(dst_x, dst_y, dst_z, dst_w))] = src[i];
+    }
+
+    return dst;
+}
+
+template SimpleTensor<uint8_t> reverse(const SimpleTensor<uint8_t> &src, const SimpleTensor<uint32_t> &axis);
+template SimpleTensor<half> reverse(const SimpleTensor<half> &src, const SimpleTensor<uint32_t> &axis);
+template SimpleTensor<float> reverse(const SimpleTensor<float> &src, const SimpleTensor<uint32_t> &axis);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute