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, 182 insertions, 0 deletions

diff --git a/tests/validation/reference/Scale.cpp b/tests/validation/reference/Scale.cpp
new file mode 100644
index 0000000000..727325f675
--- /dev/null
+++ b/tests/validation/reference/Scale.cpp
@@ -0,0 +1,182 @@
+/*
+ * 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 "arm_compute/core/Helpers.h"
+
+#include "Scale.h"
+#include "Utils.h"
+#include "support/ToolchainSupport.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+template <typename T>
+SimpleTensor<T> scale(const SimpleTensor<T> &in, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, T constant_border_value,
+                      SamplingPolicy sampling_policy, bool ceil_policy_scale)
+{
+    // Add 1 if ceil_policy_scale is true
+    const size_t round_value = ceil_policy_scale ? 1U : 0U;
+    TensorShape  shape_scaled(in.shape());
+    shape_scaled.set(0, (in.shape()[0] + round_value) * scale_x);
+    shape_scaled.set(1, (in.shape()[1] + round_value) * scale_y);
+    SimpleTensor<T> out(shape_scaled, in.data_type());
+
+    // Compute the ratio between source width/height and destination width/height
+    const auto wr = static_cast<float>(in.shape()[0]) / static_cast<float>(out.shape()[0]);
+    const auto hr = static_cast<float>(in.shape()[1]) / static_cast<float>(out.shape()[1]);
+
+    const auto width  = static_cast<int>(in.shape().x());
+    const auto height = static_cast<int>(in.shape().y());
+
+    // Determine border size
+    const int border_size = (border_mode == BorderMode::UNDEFINED) ? 0 : 1;
+
+    // Area interpolation behaves as Nearest Neighbour in case of up-sampling
+    if(policy == InterpolationPolicy::AREA && wr <= 1.f && hr <= 1.f)
+    {
+        policy = InterpolationPolicy::NEAREST_NEIGHBOR;
+    }
+
+    for(int element_idx = 0, count = 0; element_idx < out.num_elements(); ++element_idx, ++count)
+    {
+        Coordinates id    = index2coord(out.shape(), element_idx);
+        int         idx   = id.x();
+        int         idy   = id.y();
+        float       x_src = 0;
+        float       y_src = 0;
+
+        switch(sampling_policy)
+        {
+            case SamplingPolicy::TOP_LEFT:
+                x_src = idx * wr;
+                y_src = idy * hr;
+                break;
+            case SamplingPolicy::CENTER:
+                x_src = (idx + 0.5f) * wr - 0.5f;
+                y_src = (idy + 0.5f) * hr - 0.5f;
+                break;
+            default:
+                ARM_COMPUTE_ERROR("Unsupported sampling policy.");
+                break;
+        }
+
+        switch(policy)
+        {
+            case InterpolationPolicy::NEAREST_NEIGHBOR:
+            {
+                //Calculate the source coords without -0.5f is equivalent to round the x_scr/y_src coords
+                x_src = (idx + 0.5f) * wr;
+                y_src = (idy + 0.5f) * hr;
+                id.set(0, x_src);
+                id.set(1, y_src);
+
+                // If coordinates in range of tensor's width or height
+                if(is_valid_pixel_index(x_src, y_src, width, height, border_size))
+                {
+                    out[element_idx] = tensor_elem_at(in, id, border_mode, constant_border_value);
+                }
+                break;
+            }
+            case InterpolationPolicy::BILINEAR:
+            {
+                id.set(0, std::floor(x_src));
+                id.set(1, std::floor(y_src));
+                if(is_valid_pixel_index(x_src, y_src, width, height, border_size))
+                {
+                    out[element_idx] = bilinear_policy(in, id, x_src, y_src, border_mode, constant_border_value);
+                }
+                else
+                {
+                    if(border_mode == BorderMode::CONSTANT)
+                    {
+                        out[element_idx] = constant_border_value;
+                    }
+                    else if(border_mode == BorderMode::REPLICATE)
+                    {
+                        id.set(0, clamp(static_cast<int>(x_src), 0, width - 1));
+                        id.set(1, clamp(static_cast<int>(y_src), 0, height - 1));
+                        out[element_idx] = in[coord2index(in.shape(), id)];
+                    }
+                }
+                break;
+            }
+            case InterpolationPolicy::AREA:
+            {
+                int       x_from = std::floor(idx * wr - 0.5f - x_src);
+                int       y_from = std::floor(idy * hr - 0.5f - y_src);
+                int       x_to   = std::ceil((idx + 1) * wr - 0.5f - x_src);
+                int       y_to   = std::ceil((idy + 1) * hr - 0.5f - y_src);
+                const int xi     = std::floor(x_src);
+                const int yi     = std::floor(y_src);
+
+                // Clamp position to borders
+                x_src = std::max(-static_cast<float>(border_size), std::min(x_src, static_cast<float>(width - 1 + border_size)));
+                y_src = std::max(-static_cast<float>(border_size), std::min(y_src, static_cast<float>(height - 1 + border_size)));
+
+                // Clamp bounding box offsets to borders
+                x_from = ((x_src + x_from) < -border_size) ? -border_size : x_from;
+                y_from = ((y_src + y_from) < -border_size) ? -border_size : y_from;
+                x_to   = ((x_src + x_to) >= (width + border_size)) ? (width - 1 + border_size) : x_to;
+                y_to   = ((y_src + y_to) >= (height + border_size)) ? (height - 1 + border_size) : y_to;
+                ARM_COMPUTE_ERROR_ON((x_to - x_from + 1) == 0 || (y_to - y_from + 1) == 0);
+
+                float sum = 0;
+                for(int j = yi + y_from, je = yi + y_to; j <= je; ++j)
+                {
+                    for(int i = xi + x_from, ie = xi + x_to; i <= ie; ++i)
+                    {
+                        id.set(0, static_cast<int>(i));
+                        id.set(1, static_cast<int>(j));
+                        sum += tensor_elem_at(in, id, border_mode, constant_border_value);
+                    }
+                }
+                out[element_idx] = sum / ((x_to - x_from + 1) * (y_to - y_from + 1));
+
+                break;
+            }
+            default:
+                ARM_COMPUTE_ERROR("Unsupported interpolation mode");
+        }
+    }
+
+    return out;
+}
+
+template SimpleTensor<uint8_t> scale(const SimpleTensor<uint8_t> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, uint8_t constant_border_value,
+                                     SamplingPolicy sampling_policy, bool ceil_policy_scale);
+template SimpleTensor<int16_t> scale(const SimpleTensor<int16_t> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, int16_t constant_border_value,
+                                     SamplingPolicy sampling_policy, bool ceil_policy_scale);
+template SimpleTensor<half> scale(const SimpleTensor<half> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, half constant_border_value,
+                                  SamplingPolicy sampling_policy, bool ceil_policy_scale);
+template SimpleTensor<float> scale(const SimpleTensor<float> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, float constant_border_value,
+                                   SamplingPolicy sampling_policy, bool ceil_policy_scale);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute