1 files changed, 68 insertions, 0 deletions
diff --git a/src/core/utils/ScaleUtils.cpp b/src/core/utils/ScaleUtils.cpp
new file mode 100644
index 0000000000..a92da39b67
--- /dev/null
+++ b/src/core/utils/ScaleUtils.cpp
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2020, 2022 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 "src/core/utils/ScaleUtils.h"
+
+#include "arm_compute/core/CPP/CPPTypes.h"
+#include "arm_compute/core/TensorInfo.h"
+
+#include "src/common/cpuinfo/CpuIsaInfo.h"
+
+float arm_compute::scale_utils::calculate_resize_ratio(size_t input_size, size_t output_size, bool align_corners)
+{
+    const size_t offset = (align_corners && output_size > 1) ? 1 : 0;
+    const auto   in     = input_size - offset;
+    const auto   out    = output_size - offset;
+
+    ARM_COMPUTE_ERROR_ON((input_size == 0 || output_size == 0) && offset == 1);
+    ARM_COMPUTE_ERROR_ON(out == 0);
+
+    return static_cast<float>(in) / static_cast<float>(out);
+}
+
+bool arm_compute::scale_utils::is_precomputation_required(DataLayout          data_layout,
+                                                          DataType            data_type,
+                                                          InterpolationPolicy policy,
+                                                          BorderMode          border_mode)
+{
+    // Do not calculate precomputed weights and indices if kernel code doesn't use them
+    if (data_layout == DataLayout::NHWC)
+    {
+        switch (data_type)
+        {
+            case DataType::F32:
+            case DataType::F16:
+                return (CPUInfo::get().get_isa().sve == true && policy == InterpolationPolicy::NEAREST_NEIGHBOR);
+            case DataType::U8:
+            case DataType::S8:
+            case DataType::QASYMM8:
+            case DataType::QASYMM8_SIGNED:
+                return (border_mode != BorderMode::REPLICATE) || (policy == InterpolationPolicy::NEAREST_NEIGHBOR);
+            default:
+                return true;
+        }
+    }
+
+    return true;
+}