COMPMID-344 Updated doxygen
Change-Id: I32f7b84daa560e460b77216add529c8fa8b327ae
diff --git a/src/core/NEON/kernels/NEErodeKernel.cpp b/src/core/NEON/kernels/NEErodeKernel.cpp
new file mode 100644
index 0000000..3985036
--- /dev/null
+++ b/src/core/NEON/kernels/NEErodeKernel.cpp
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2016, 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/NEON/kernels/NEErodeKernel.h"
+
+#include "arm_compute/core/Helpers.h"
+#include "arm_compute/core/ITensor.h"
+#include "arm_compute/core/NEON/INEKernel.h"
+#include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/core/Validate.h"
+
+#include <arm_neon.h>
+#include <cstddef>
+#include <cstdint>
+
+using namespace arm_compute;
+
+namespace arm_compute
+{
+class Coordinates;
+} // namespace arm_compute
+
+BorderSize NEErodeKernel::border_size() const
+{
+ return BorderSize(1);
+}
+
+void NEErodeKernel::configure(const ITensor *input, ITensor *output, bool border_undefined)
+{
+ _input = input;
+ _output = output;
+
+ constexpr unsigned int num_elems_processed_per_iteration = 8;
+ constexpr unsigned int num_elems_read_per_iteration = 16;
+ constexpr unsigned int num_elems_written_per_iteration = 8;
+ constexpr unsigned int num_rows_read_per_iteration = 3;
+
+ // Configure kernel window
+ Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration), border_undefined, border_size());
+ AccessWindowHorizontal output_access(output->info(), 0, num_elems_written_per_iteration);
+ AccessWindowRectangle input_access(input->info(), -border_size().left, -border_size().top, num_elems_read_per_iteration, num_rows_read_per_iteration);
+
+ update_window_and_padding(win, input_access, output_access);
+
+ output_access.set_valid_region(win, input->info()->valid_region(), border_undefined, border_size());
+
+ INEKernel::configure(win);
+}
+
+void NEErodeKernel::run(const Window &window)
+{
+ ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
+ ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INESimpleKernel::window(), window);
+
+ Iterator in(_input, window);
+ Iterator out(_output, window);
+
+ const size_t in_stride = _input->info()->strides_in_bytes()[1];
+
+ execute_window_loop(window, [&](const Coordinates &)
+ {
+ uint8_t *in_ptr = in.ptr() - 1;
+ const uint8x16_t top_data = vld1q_u8(in_ptr - in_stride);
+ const uint8x16_t mid_data = vld1q_u8(in_ptr);
+ const uint8x16_t bot_data = vld1q_u8(in_ptr + in_stride);
+
+ uint8x8_t top_high_data = vget_high_u8(top_data);
+ uint8x8_t top_low_data = vget_low_u8(top_data);
+
+ uint8x8_t mid_high_data = vget_high_u8(mid_data);
+ uint8x8_t mid_low_data = vget_low_u8(mid_data);
+
+ uint8x8_t bot_high_data = vget_high_u8(bot_data);
+ uint8x8_t bot_low_data = vget_low_u8(bot_data);
+
+ uint8x8_t p0, p1;
+
+ p0 = top_low_data;
+ p1 = vext_u8(top_low_data, top_high_data, 1);
+ p0 = vmin_u8(p0, p1);
+
+ p1 = vext_u8(top_low_data, top_high_data, 2);
+ p0 = vmin_u8(p0, p1);
+
+ p1 = mid_low_data;
+ p0 = vmin_u8(p0, p1);
+
+ p1 = vext_u8(mid_low_data, mid_high_data, 1);
+ p0 = vmin_u8(p0, p1);
+
+ p1 = vext_u8(mid_low_data, mid_high_data, 2);
+ p0 = vmin_u8(p0, p1);
+
+ p1 = bot_low_data;
+ p0 = vmin_u8(p0, p1);
+
+ p1 = vext_u8(bot_low_data, bot_high_data, 1);
+ p0 = vmin_u8(p0, p1);
+
+ p1 = vext_u8(bot_low_data, bot_high_data, 2);
+ p0 = vmin_u8(p0, p1);
+
+ vst1_u8(out.ptr(), p0);
+ },
+ in, out);
+}