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, 143 insertions, 0 deletions

diff --git a/tests/validation/reference/Utils.h b/tests/validation/reference/Utils.h
new file mode 100644
index 0000000000..2aa77c6ff7
--- /dev/null
+++ b/tests/validation/reference/Utils.h
@@ -0,0 +1,143 @@
+/*
+ * 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.
+ */
+#ifndef __ARM_COMPUTE_TEST_VALIDATION_UTILS_H__
+#define __ARM_COMPUTE_TEST_VALIDATION_UTILS_H__
+
+#include "arm_compute/core/Types.h"
+#include "tests/Globals.h"
+#include "tests/ILutAccessor.h"
+#include "tests/Types.h"
+
+#include <array>
+#include <random>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+/** Checks if a pixel has valid coordinates
+ *
+ * @param x            X coordinate
+ * @param y            Y coordinate
+ * @param width        Width of the image
+ * @param height       Height of the image
+ * @param border_size  Border size
+ *
+ * @return True if pixel is valid else false
+ */
+inline bool is_valid_pixel_index(int x, int y, int width, int height, int border_size)
+{
+    return ((x >= -border_size) && (y >= -border_size) && (x < (width + border_size)) && (y < height + border_size));
+}
+
+// Return a tensor element at a specified coordinate with different border modes
+template <typename T>
+T tensor_elem_at(const SimpleTensor<T> &src, Coordinates coord, BorderMode border_mode, T constant_border_value)
+{
+    const int x      = coord.x();
+    const int y      = coord.y();
+    const int width  = src.shape().x();
+    const int height = src.shape().y();
+
+    // If coordinates beyond range of tensor's width or height
+    if(x < 0 || y < 0 || x >= width || y >= height)
+    {
+        if(border_mode == BorderMode::REPLICATE)
+        {
+            coord.set(0, std::max(0, std::min(x, width - 1)));
+            coord.set(1, std::max(0, std::min(y, height - 1)));
+        }
+        else
+        {
+            return constant_border_value;
+        }
+    }
+
+    return src[coord2index(src.shape(), coord)];
+}
+
+template <typename T>
+T bilinear_policy(const SimpleTensor<T> &in, Coordinates id, float xn, float yn, BorderMode border_mode, T constant_border_value);
+
+/* Apply 2D spatial filter on a single element of @p in at coordinates @p coord
+ *
+ * - filter sizes have to be odd number
+ * - Row major order of filter assumed
+ * - TO_ZERO rounding policy assumed
+ * - SATURATE convert policy assumed
+ */
+template <typename T, typename U, typename V>
+void apply_2d_spatial_filter(Coordinates coord, const SimpleTensor<T> &src, SimpleTensor<U> &dst, const TensorShape &filter_shape, const V *filter_itr, double scale, BorderMode border_mode,
+                             T constant_border_value = T(0))
+{
+    double    val = 0.;
+    const int x   = coord.x();
+    const int y   = coord.y();
+    for(int j = y - static_cast<int>(filter_shape[1] / 2); j <= y + static_cast<int>(filter_shape[1] / 2); ++j)
+    {
+        for(int i = x - static_cast<int>(filter_shape[0] / 2); i <= x + static_cast<int>(filter_shape[0] / 2); ++i)
+        {
+            coord.set(0, i);
+            coord.set(1, j);
+            val += static_cast<double>(*filter_itr) * tensor_elem_at(src, coord, border_mode, constant_border_value);
+            ++filter_itr;
+        }
+    }
+    coord.set(0, x);
+    coord.set(1, y);
+    dst[coord2index(src.shape(), coord)] = saturate_cast<U>(support::cpp11::trunc(val * scale));
+}
+
+RawTensor transpose(const RawTensor &src, int chunk_width = 1);
+
+/** Fill matrix random.
+ *
+ * @param[in,out] matrix Matrix
+ */
+template <std::size_t SIZE>
+inline void fill_warp_matrix(std::array<float, SIZE> &matrix)
+{
+    std::mt19937                          gen(library.get()->seed());
+    std::uniform_real_distribution<float> dist(-1, 1);
+    for(auto &x : matrix)
+    {
+        x = dist(gen);
+    }
+    if(SIZE == 9)
+    {
+        // This is only used in Warp Perspective, we set M[3][3] = 1 so that Z0 is not 0 and we avoid division by 0.
+        matrix[8] = 1.f;
+    }
+}
+
+bool valid_bilinear_policy(float xn, float yn, int width, int height, BorderMode border_mode);
+} // namespace validation
+} // namespace test
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_TEST_VALIDATION_UTILS_H__ */