COMPMID-2322: PRELU support in CLActivationLayer

Change-Id: I3aa8d4964a1861c2b8acef59dc863df7c48f3316
Signed-off-by: giuros01 <giuseppe.rossini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1146
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

6 files changed, 68 insertions, 2 deletions

diff --git a/src/core/CL/CLKernelLibrary.cpp b/src/core/CL/CLKernelLibrary.cpp
index 28152168bc..23eac1664a 100644
--- a/src/core/CL/CLKernelLibrary.cpp
+++ b/src/core/CL/CLKernelLibrary.cpp
@@ -253,12 +253,14 @@ const std::map<std::string, std::string> CLKernelLibrary::_kernel_program_map =
     { "elementwise_operation_DIV", "elementwise_operation.cl" },
     { "elementwise_operation_SQUARED_DIFF", "elementwise_operation.cl" },
     { "elementwise_operation_POWER", "elementwise_operation.cl" },
+    { "elementwise_operation_PRELU", "elementwise_operation.cl" },
     { "elementwise_operation_ADD_quantized", "elementwise_operation_quantized.cl" },
     { "elementwise_operation_SUB_quantized", "elementwise_operation_quantized.cl" },
     { "elementwise_operation_MAX_quantized", "elementwise_operation_quantized.cl" },
     { "elementwise_operation_MIN_quantized", "elementwise_operation_quantized.cl" },
     { "elementwise_operation_DIV_quantized", "elementwise_operation_quantized.cl" },
     { "elementwise_operation_SQUARED_DIFF_quantized", "elementwise_operation_quantized.cl" },
+    { "elementwise_operation_PRELU_quantized", "elementwise_operation_quantized.cl" },
     { "elementwise_unary", "elementwise_unary.cl" },
     { "erode", "erode.cl" },
     { "fast_corners", "fast_corners.cl" },
diff --git a/src/core/CL/cl_kernels/elementwise_operation.cl b/src/core/CL/cl_kernels/elementwise_operation.cl
index 0b660e4012..42d6d33e03 100644
--- a/src/core/CL/cl_kernels/elementwise_operation.cl
+++ b/src/core/CL/cl_kernels/elementwise_operation.cl
@@ -38,6 +38,7 @@
 #define SQUARED_DIFF(x, y) (x - y) * (x - y)
 #define DIV(x, y) (x / y)
 #define POWER(x, y) pow(x, y)
+#define PRELU(x, y) (select(y * x, x, x > (DATA_TYPE_OUT)0))
 
 #define OP_FUN_NAME_STR(op) elementwise_operation_##op
 #define OP_FUN_NAME(op) OP_FUN_NAME_STR(op)
diff --git a/src/core/CL/cl_kernels/elementwise_operation_quantized.cl b/src/core/CL/cl_kernels/elementwise_operation_quantized.cl
index 1f0533be13..1b45da164f 100644
--- a/src/core/CL/cl_kernels/elementwise_operation_quantized.cl
+++ b/src/core/CL/cl_kernels/elementwise_operation_quantized.cl
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 ARM Limited.
+ * Copyright (c) 2018-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -28,6 +28,7 @@
 #define MAX(x, y) max((x), (y))
 #define MIN(x, y) min((x), (y))
 #define SQUARED_DIFF(x, y) (x - y) * (x - y)
+#define PRELU(x, y) (select(y * x, x, x > (DATA_TYPE_OUT)0))
 #define DIV(x, y) (x / y)
 
 #define CONVERT_RTE(x, type) (convert_##type##_rte((x)))
diff --git a/src/core/CL/kernels/CLElementwiseOperationKernel.cpp b/src/core/CL/kernels/CLElementwiseOperationKernel.cpp
index ce0c51dac5..414b040f4c 100644
--- a/src/core/CL/kernels/CLElementwiseOperationKernel.cpp
+++ b/src/core/CL/kernels/CLElementwiseOperationKernel.cpp
@@ -43,6 +43,7 @@ std::map<ArithmeticOperation, std::string> supported_arithmetic_ops =
     { ArithmeticOperation::MIN, "MIN" },
     { ArithmeticOperation::MAX, "MAX" },
     { ArithmeticOperation::POWER, "POWER" },
+    { ArithmeticOperation::PRELU, "PRELU" },
 };
 
 std::map<ArithmeticOperation, std::string> supported_sat_arithmetic_ops =
diff --git a/src/runtime/CL/functions/CLElementwiseOperations.cpp b/src/runtime/CL/functions/CLElementwiseOperations.cpp
index 15de56d24a..8317e0d938 100644
--- a/src/runtime/CL/functions/CLElementwiseOperations.cpp
+++ b/src/runtime/CL/functions/CLElementwiseOperations.cpp
@@ -21,10 +21,11 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
+#include "arm_compute/runtime/CL/functions/CLElementwiseOperations.h"
+
 #include "arm_compute/core/CL/ICLTensor.h"
 #include "arm_compute/core/CL/kernels/CLElementwiseOperationKernel.h"
 #include "support/ToolchainSupport.h"
-#include <arm_compute/runtime/CL/functions/CLElementwiseOperations.h>
 
 #include <utility>
 
diff --git a/src/runtime/CL/functions/CLPReluLayer.cpp b/src/runtime/CL/functions/CLPReluLayer.cpp
new file mode 100644
index 0000000000..d463ef9c50
--- /dev/null
+++ b/src/runtime/CL/functions/CLPReluLayer.cpp
@@ -0,0 +1,60 @@
+/*
+ * 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/core/CL/kernels/CLElementwiseOperationKernel.h"
+
+#include "arm_compute/core/CL/ICLTensor.h"
+#include "arm_compute/runtime/CL/functions/CLPReluLayer.h"
+#include "support/ToolchainSupport.h"
+
+namespace arm_compute
+{
+namespace
+{
+void configure_border_handler(CLFillBorderKernel &border_handler, BorderSize border_size, ICLTensor *input1, ICLTensor *input2, const ICLTensor *output)
+{
+    if(output->info()->dimension(0) > 1)
+    {
+        ICLTensor *broadcasted_info = (input1->info()->dimension(0) == 1) ? input1 : input2;
+
+        if(broadcasted_info->info()->dimension(0) == 1)
+        {
+            border_handler.configure(broadcasted_info, border_size, BorderMode::REPLICATE);
+        }
+    }
+}
+} // namespace
+
+void CLPReluLayer::configure(ICLTensor *input, ICLTensor *alpha, ICLTensor *output)
+{
+    auto k = arm_compute::support::cpp14::make_unique<CLArithmeticOperationKernel>();
+    k->configure(ArithmeticOperation::PRELU, input, alpha, output);
+    _kernel = std::move(k);
+    configure_border_handler(_border_handler, _kernel->border_size(), input, alpha, output);
+}
+
+Status CLPReluLayer::validate(const ITensorInfo *input, const ITensorInfo *alpha, const ITensorInfo *output)
+{
+    return CLArithmeticOperationKernel::validate(ArithmeticOperation::PRELU, input, alpha, output);
+}
+} // namespace arm_compute