COMPMID-556: Rename CPP folder to reference

Change-Id: I147644349547c4e3804a80b564a9ad95131ad2d0
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/111560
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Tested-by: BSG Visual Compute Jenkins server to access repositories on http://mpd-gerrit.cambridge.arm.com <bsgcomp@arm.com>

1 files changed, 112 insertions, 0 deletions

diff --git a/tests/validation/reference/Utils.cpp b/tests/validation/reference/Utils.cpp
new file mode 100644
index 0000000000..d163e8436f
--- /dev/null
+++ b/tests/validation/reference/Utils.cpp
@@ -0,0 +1,112 @@
+/*
+ * 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 "Utils.h"
+
+#include "tests/validation/Helpers.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+// Return the bilinear value at a specified coordinate with different border modes
+template <typename T>
+T bilinear_policy(const SimpleTensor<T> &in, Coordinates id, float xn, float yn, BorderMode border_mode, T constant_border_value)
+{
+    const int idx = std::floor(xn);
+    const int idy = std::floor(yn);
+
+    const float dx   = xn - idx;
+    const float dy   = yn - idy;
+    const float dx_1 = 1.0f - dx;
+    const float dy_1 = 1.0f - dy;
+
+    const T border_value = constant_border_value;
+
+    id.set(0, idx);
+    id.set(1, idy);
+    const float tl = tensor_elem_at(in, id, border_mode, border_value);
+    id.set(0, idx + 1);
+    id.set(1, idy);
+    const float tr = tensor_elem_at(in, id, border_mode, border_value);
+    id.set(0, idx);
+    id.set(1, idy + 1);
+    const float bl = tensor_elem_at(in, id, border_mode, border_value);
+    id.set(0, idx + 1);
+    id.set(1, idy + 1);
+    const float br = tensor_elem_at(in, id, border_mode, border_value);
+
+    return static_cast<T>(tl * (dx_1 * dy_1) + tr * (dx * dy_1) + bl * (dx_1 * dy) + br * (dx * dy));
+}
+
+template uint8_t bilinear_policy(const SimpleTensor<uint8_t> &in, Coordinates id, float xn, float yn, BorderMode border_mode, uint8_t constant_border_value);
+template int16_t bilinear_policy(const SimpleTensor<int16_t> &in, Coordinates id, float xn, float yn, BorderMode border_mode, int16_t constant_border_value);
+template half bilinear_policy(const SimpleTensor<half> &in, Coordinates id, float xn, float yn, BorderMode border_mode, half constant_border_value);
+template float bilinear_policy(const SimpleTensor<float> &in, Coordinates id, float xn, float yn, BorderMode border_mode, float constant_border_value);
+
+RawTensor transpose(const RawTensor &src, int chunk_width)
+{
+    // Create reference
+    TensorShape dst_shape(src.shape());
+    dst_shape.set(0, src.shape().y() * chunk_width);
+    dst_shape.set(1, std::ceil(src.shape().x() / static_cast<float>(chunk_width)));
+
+    RawTensor dst{ dst_shape, src.data_type() };
+
+    // Compute reference
+    uint8_t *out_ptr = dst.data();
+
+    for(int i = 0; i < dst.num_elements(); i += chunk_width)
+    {
+        Coordinates coord   = index2coord(dst.shape(), i);
+        size_t      coord_x = coord.x();
+        coord.set(0, coord.y() * chunk_width);
+        coord.set(1, coord_x / chunk_width);
+
+        const int num_elements = std::min<int>(chunk_width, src.shape().x() - coord.x());
+
+        std::copy_n(static_cast<const uint8_t *>(src(coord)), num_elements * src.element_size(), out_ptr);
+
+        out_ptr += chunk_width * dst.element_size();
+    }
+
+    return dst;
+}
+
+bool valid_bilinear_policy(float xn, float yn, int width, int height, BorderMode border_mode)
+{
+    if(border_mode != BorderMode::UNDEFINED)
+    {
+        return true;
+    }
+    if((0 <= yn + 1) && (yn + 1 < height) && (0 <= xn + 1) && (xn + 1 < width))
+    {
+        return true;
+    }
+    return false;
+}
+} // namespace validation
+} // namespace test
+} // namespace arm_compute