From 05fb448bf48e31d723dfd9f4bbf3899ff65f0fba Mon Sep 17 00:00:00 2001
From: giuros01 <giuseppe.rossini@arm.com>
Date: Tue, 26 Mar 2019 17:44:40 +0000
Subject: COMPMID-1963: Implement FFT (2D) on NEON

Change-Id: I3b564be8d7949e00c6544071ef62dd51de838c96
Signed-off-by: giuros01 <giuseppe.rossini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1048
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
---
 src/runtime/NEON/functions/NEFFT2D.cpp | 95 ++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 src/runtime/NEON/functions/NEFFT2D.cpp

(limited to 'src/runtime/NEON/functions/NEFFT2D.cpp')

diff --git a/src/runtime/NEON/functions/NEFFT2D.cpp b/src/runtime/NEON/functions/NEFFT2D.cpp
new file mode 100644
index 0000000000..9210ecfa2e
--- /dev/null
+++ b/src/runtime/NEON/functions/NEFFT2D.cpp
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2019 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/runtime/NEON/functions/NEFFT2D.h"
+
+#include "arm_compute/core/ITensor.h"
+#include "arm_compute/core/Validate.h"
+#include "arm_compute/runtime/Scheduler.h"
+
+namespace arm_compute
+{
+NEFFT2D::NEFFT2D(std::shared_ptr<IMemoryManager> memory_manager)
+    : _memory_group(memory_manager), _first_pass_func(memory_manager), _second_pass_func(memory_manager), _first_pass_tensor()
+{
+}
+
+void NEFFT2D::configure(const ITensor *input, ITensor *output, const FFT2DInfo &config)
+{
+    ARM_COMPUTE_ERROR_ON_NULLPTR(input, output);
+    ARM_COMPUTE_ERROR_THROW_ON(NEFFT2D::validate(input->info(), output->info(), config));
+
+    // Setup first pass
+    FFT1DInfo first_pass_config;
+    first_pass_config.axis      = config.axes.first;
+    first_pass_config.direction = config.direction;
+    _memory_group.manage(&_first_pass_tensor);
+    _first_pass_func.configure(input, &_first_pass_tensor, first_pass_config);
+
+    // Setup second pass
+    FFT1DInfo second_pass_config;
+    second_pass_config.axis      = config.axes.second;
+    second_pass_config.direction = config.direction;
+    _second_pass_func.configure(&_first_pass_tensor, output, second_pass_config);
+    _first_pass_tensor.allocator()->allocate();
+}
+
+Status NEFFT2D::validate(const ITensorInfo *input, const ITensorInfo *output, const FFT2DInfo &config)
+{
+    ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(input, output);
+
+    // Create intermediate tensor info
+    TensorInfo first_pass_tensor(input->clone()->set_is_resizable(true).reset_padding().set_num_channels(2));
+
+    // Validate first pass
+    FFT1DInfo first_pass_config;
+    first_pass_config.axis      = config.axes.first;
+    first_pass_config.direction = config.direction;
+    ARM_COMPUTE_RETURN_ON_ERROR(NEFFT1D::validate(input, &first_pass_tensor, first_pass_config));
+
+    // Validate second pass
+    FFT1DInfo second_pass_config;
+    second_pass_config.axis      = config.axes.second;
+    second_pass_config.direction = config.direction;
+    ARM_COMPUTE_RETURN_ON_ERROR(NEFFT1D::validate(&first_pass_tensor, output, second_pass_config));
+
+    // Checks performed when output is configured
+    if((output != nullptr) && (output->total_size() != 0))
+    {
+        ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_SHAPES(input, output);
+        ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(input, output);
+    }
+
+    return Status{};
+}
+
+void NEFFT2D::run()
+{
+    _memory_group.acquire();
+
+    _first_pass_func.run();
+    _second_pass_func.run();
+
+    _memory_group.release();
+}
+} // namespace arm_compute
-- 
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