Merge pull request #9 from sony/feature/20170808-absolute_error

Implement absolute error of cuda version.

doc/implements.rst

@@ -184,6 +184,9 @@ Function Implements
      - x
      - 
    * - SquaredError
+     - x
+     -
+   * - AbsoluteError
      - x
      - 
    * - KLMultinomial

include/nbla/cuda/function/absolute_error.hpp

@@ -0,0 +1,31 @@
+// Copyright (c) 2017 Sony Corporation. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/** AbsoluteError
+ */
+#ifndef __NBLA_CUDA_FUNCTION_ABSOLUTEERROR_HPP__
+#define __NBLA_CUDA_FUNCTION_ABSOLUTEERROR_HPP__
+
+#include <nbla/cuda/common.hpp>
+#include <nbla/cuda/cuda.hpp>
+#include <nbla/function/absolute_error.hpp>
+
+#include <nbla/cuda/function/utils/base_transform_binary.hpp>
+
+namespace nbla {
+/** @copydoc AbsoluteError
+*/
+NBLA_DECLARE_TRANSFORM_BINARY_CUDA(AbsoluteError);
+}
+#endif

src/nbla/cuda/function/absolute_error.cu

@@ -0,0 +1,30 @@
+// Copyright (c) 2017 Sony Corporation. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <nbla/array.hpp>
+#include <nbla/cuda/common.hpp>
+#include <nbla/cuda/function/absolute_error.hpp>
+#include <nbla/cuda/function/utils/base_transform_binary.cuh>
+#include <nbla/cuda/math.hpp>
+#include <nbla/variable.hpp>
+
+namespace nbla {
+
+NBLA_DEFINE_TRANSFORM_BINARY_CUDA(AbsoluteError, abs((x0 - x1)),
+                                  ((x0 - x1) > (T)0) ? dy : -dy,
+                                  ((x0 - x1) > (T)0) ? -dy : dy);
+
+// template instantiation
+template class AbsoluteErrorCuda<float>;
+}