Rename functions/classes for elementwise unary operations

* Create CpuElementwiseUnary operator
* Rename kernel classes
* Make the kernels stateless

Partially implements: COMPMID-4003

Change-Id: Ie0440cd01d4924847d6991b4df7ccaf311439297
Signed-off-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4912
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/src/core/cpu/kernels/CpuElementwiseUnaryKernel.h b/src/core/cpu/kernels/CpuElementwiseUnaryKernel.h
new file mode 100644
index 0000000000..193f6f1e4f
--- /dev/null
+++ b/src/core/cpu/kernels/CpuElementwiseUnaryKernel.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2018-2021 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_CPU_ELEMENTWISE_UNARY_KERNEL_H
+#define ARM_COMPUTE_CPU_ELEMENTWISE_UNARY_KERNEL_H
+
+#include "arm_compute/core/Types.h"
+#include "src/core/common/Macros.h"
+#include "src/core/cpu/ICpuKernel.h"
+
+namespace arm_compute
+{
+class ITensor;
+namespace cpu
+{
+namespace kernels
+{
+/** Interface for an element-wise unary operation kernel
+ *
+ * Element-wise operation is computed by:
+ * @f[ output(x) = OP(input(x))@f]
+ *
+ */
+class CpuElementwiseUnaryKernel : public ICpuKernel
+{
+public:
+    const char *name() const override
+    {
+        return "CpuElementwiseUnaryKernel";
+    }
+    /** Default constructor */
+    CpuElementwiseUnaryKernel();
+    /** Default destructor */
+    ~CpuElementwiseUnaryKernel() = default;
+    ARM_COMPUTE_DISALLOW_COPY_ALLOW_MOVE(CpuElementwiseUnaryKernel);
+
+    /** Function to configure the @ref CpuElementwiseUnaryKernel
+     *
+     * @param[in]  op     Arithmetic operation to be executed.
+     * @param[in]  input  First tensor input. Data types supported: F16/F32, F16/F32/S32 for NEG/ABS operations.
+     * @param[out] output Output tensor. Data types supported: Same as @p input.
+     */
+    void configure(ElementWiseUnary op, const ITensorInfo &input, ITensorInfo &output);
+
+    /** Static function to check if given info will lead to a valid configuration of @ref CpuElementwiseUnaryKernel
+     *
+     * @param[in] op     Arithmetic operation to be executed.
+     * @param[in] input  First tensor input info. Data types supported: F16/F32, F16/F32/S32 for NEG/ABS operations.
+     * @param[in] output Output tensor info. Data types supported: Same as @p input.
+     *
+     * @return a Status
+     */
+    static Status validate(ElementWiseUnary op, const ITensorInfo &input, const ITensorInfo &output);
+
+    // Inherited methods overridden:
+    void run_op(ITensorPack &tensors, const Window &window, const ThreadInfo &info) override;
+
+    /** Common signature for all the specialised elementwise unary micro-kernels
+     *
+     * @param[in] window Region on which to execute the kernel.
+     */
+    using ElementwiseUnaryUkernelPtr = std::add_pointer<void(const ITensor *, ITensor *, const Window &, ElementWiseUnary)>::type;
+
+private:
+    ElementWiseUnary _op;
+};
+} // namespace kernels
+} // namespace cpu
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_CPU_ELEMENTWISE_UNARY_KERNEL_H */