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-rw-r--r--libs/util/CMakeLists.txt17
-rw-r--r--libs/util/examples/tensor_index_iterator.cpp38
-rw-r--r--libs/util/include/util/benchmark.h66
-rw-r--r--libs/util/include/util/environment.h63
-rw-r--r--libs/util/include/util/feature/Index.h60
-rw-r--r--libs/util/include/util/feature/IndexIterator.h69
-rw-r--r--libs/util/include/util/feature/Object.h79
-rw-r--r--libs/util/include/util/feature/Reader.h40
-rw-r--r--libs/util/include/util/feature/Shape.h47
-rw-r--r--libs/util/include/util/feature/TextFormatter.h84
-rw-r--r--libs/util/include/util/fp32.h71
-rw-r--r--libs/util/include/util/kernel/IndexIterator.h72
-rw-r--r--libs/util/include/util/kernel/RandomObject.h71
-rw-r--r--libs/util/include/util/kernel/Reader.h40
-rw-r--r--libs/util/include/util/kernel/Shape.h48
-rw-r--r--libs/util/include/util/tensor/Index.h62
-rw-r--r--libs/util/include/util/tensor/IndexFormatter.h52
-rw-r--r--libs/util/include/util/tensor/IndexIterator.h104
-rw-r--r--libs/util/include/util/tensor/NonIncreasingStride.h61
-rw-r--r--libs/util/include/util/tensor/Object.h77
-rw-r--r--libs/util/include/util/tensor/Reader.h40
-rw-r--r--libs/util/include/util/tensor/Shape.h63
-rw-r--r--libs/util/include/util/tensor/Zipper.h72
-rw-r--r--libs/util/include/util/vector.h41
-rw-r--r--libs/util/include/util/vector/Object.h63
-rw-r--r--libs/util/include/util/vector/Reader.h40
-rw-r--r--libs/util/src/environment.cpp79
-rw-r--r--libs/util/src/tensor/IndexFormatter.cpp49
-rw-r--r--libs/util/src/tensor/NonIncreasingStride.cpp46
-rw-r--r--libs/util/src/tensor/Shape.cpp46
30 files changed, 1760 insertions, 0 deletions
diff --git a/libs/util/CMakeLists.txt b/libs/util/CMakeLists.txt
new file mode 100644
index 000000000..565aaf75e
--- /dev/null
+++ b/libs/util/CMakeLists.txt
@@ -0,0 +1,17 @@
+# Library `nnfw_util`
+set(NNFW_UTILITY_SRCS src/environment.cpp)
+list(APPEND NNFW_UTILITY_SRCS src/tensor/Shape.cpp)
+list(APPEND NNFW_UTILITY_SRCS src/tensor/NonIncreasingStride.cpp)
+list(APPEND NNFW_UTILITY_SRCS src/tensor/IndexFormatter.cpp)
+
+set(NNFW_INCLUDE_DIR include)
+
+add_library(nnfw_util SHARED ${NNFW_UTILITY_SRCS})
+target_include_directories(nnfw_util PUBLIC ${NNFW_INCLUDE_DIR})
+
+install(TARGETS nnfw_util
+ RUNTIME DESTINATION bin COMPONENT libraries
+ LIBRARY DESTINATION lib COMPONENT libraries)
+
+add_executable(nnfw_util_tensor_index_iterator "examples/tensor_index_iterator.cpp")
+target_link_libraries(nnfw_util_tensor_index_iterator nnfw_util)
diff --git a/libs/util/examples/tensor_index_iterator.cpp b/libs/util/examples/tensor_index_iterator.cpp
new file mode 100644
index 000000000..a05d78dc4
--- /dev/null
+++ b/libs/util/examples/tensor_index_iterator.cpp
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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 "util/tensor/IndexIterator.h"
+
+#include <iostream>
+
+int main(int argc, char **argv)
+{
+ nnfw::util::tensor::Shape shape{3, 4, 3, 4};
+
+ std::cout << "Iterate over tensor{3, 4, 3, 4}" << std::endl;
+
+ nnfw::util::tensor::iterate(shape) << [] (const nnfw::util::tensor::Index &index)
+ {
+ std::cout << "rank: " << index.rank() << std::endl;
+
+ for (size_t d = 0; d < index.rank(); ++d)
+ {
+ std::cout << " offset(" << d << ") = " << index.at(d) << std::endl;
+ }
+ };
+
+ return 0;
+}
diff --git a/libs/util/include/util/benchmark.h b/libs/util/include/util/benchmark.h
new file mode 100644
index 000000000..c451eddec
--- /dev/null
+++ b/libs/util/include/util/benchmark.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_BENCHMARK_H__
+#define __NNFW_UTIL_BENCHMARK_H__
+
+#include <chrono>
+
+namespace nnfw
+{
+namespace util
+{
+// Benckmark support
+namespace benchmark
+{
+
+template <typename T> class Accumulator
+{
+public:
+ Accumulator(T &ref) : _ref(ref)
+ {
+ // DO NOTHING
+ }
+
+public:
+ T &operator()(void) { return _ref; }
+
+private:
+ T &_ref;
+};
+
+template <typename T, typename Callable>
+Accumulator<T> &operator<<(Accumulator<T> &&acc, Callable cb)
+{
+ auto begin = std::chrono::steady_clock::now();
+ cb();
+ auto end = std::chrono::steady_clock::now();
+
+ acc() += std::chrono::duration_cast<T>(end - begin);
+
+ return acc;
+}
+
+template <typename T> Accumulator<T> measure(T &out)
+{
+ return Accumulator<T>(out);
+}
+
+} // namespace benchmark
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_BENCHMARK_H__
diff --git a/libs/util/include/util/environment.h b/libs/util/include/util/environment.h
new file mode 100644
index 000000000..fa9dd519d
--- /dev/null
+++ b/libs/util/include/util/environment.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __UTIL_ENVIRONMENT_H__
+#define __UTIL_ENVIRONMENT_H__
+
+namespace nnfw
+{
+namespace util
+{
+
+int get_env_int(const char* name);
+bool get_env_bool(const char* name);
+
+}
+}
+
+#include <string>
+
+namespace nnfw
+{
+namespace util
+{
+namespace env
+{
+
+template <typename T> struct Accessor
+{
+ virtual ~Accessor() = default;
+
+ virtual bool access(T &out) const = 0;
+};
+
+class IntAccessor : public Accessor<int>
+{
+public:
+ IntAccessor(const std::string &tag);
+
+public:
+ bool access(int &out) const override;
+
+private:
+ std::string _tag;
+};
+
+} // namespace env
+} // namespace util
+} // namespace nnfw
+
+#endif // __UTIL_ENVIRONMENT_H__
diff --git a/libs/util/include/util/feature/Index.h b/libs/util/include/util/feature/Index.h
new file mode 100644
index 000000000..e77816669
--- /dev/null
+++ b/libs/util/include/util/feature/Index.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_FEATURE_INDEX_H__
+#define __NNFW_UTIL_FEATURE_INDEX_H__
+
+#include <cstdint>
+
+namespace nnfw
+{
+namespace util
+{
+namespace feature
+{
+
+class Index
+{
+public:
+ Index() = default;
+
+public:
+ Index(int32_t ch, int32_t row, int32_t col) : _ch{ch}, _row{row}, _col{col}
+ {
+ // DO NOTHING
+ }
+
+public:
+ int32_t ch(void) const { return _ch; }
+ int32_t row(void) const { return _row; }
+ int32_t col(void) const { return _col; }
+
+public:
+ int32_t &ch(void) { return _ch; }
+ int32_t &row(void) { return _row; }
+ int32_t &col(void) { return _col; }
+
+private:
+ int32_t _ch;
+ int32_t _row;
+ int32_t _col;
+};
+
+} // namespace feature
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_FEATURE_INDEX_H__
diff --git a/libs/util/include/util/feature/IndexIterator.h b/libs/util/include/util/feature/IndexIterator.h
new file mode 100644
index 000000000..dd029f4b6
--- /dev/null
+++ b/libs/util/include/util/feature/IndexIterator.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_FEATURE_INDEX_ITERATOR_H__
+#define __NNFW_UTIL_FEATURE_INDEX_ITERATOR_H__
+
+#include "util/feature/Shape.h"
+
+namespace nnfw
+{
+namespace util
+{
+namespace feature
+{
+
+class IndexIterator
+{
+public:
+ IndexIterator(const Shape &shape) : _shape{shape}
+ {
+ // DO NOTHING
+ }
+
+public:
+ template <typename Callable> IndexIterator &iter(Callable cb)
+ {
+ for (uint32_t ch = 0; ch < _shape.C; ++ch)
+ {
+ for (uint32_t row = 0; row < _shape.H; ++row)
+ {
+ for (uint32_t col = 0; col < _shape.W; ++col)
+ {
+ cb(ch, row, col);
+ }
+ }
+ }
+
+ return (*this);
+ }
+
+private:
+ const Shape _shape;
+};
+
+IndexIterator iterate(const Shape &shape) { return IndexIterator{shape}; }
+
+template <typename Callable> IndexIterator &operator<<(IndexIterator &&it, Callable cb)
+{
+ return it.iter(cb);
+}
+
+} // namespace feature
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_FEATURE_INDEX_ITERATOR_H__
diff --git a/libs/util/include/util/feature/Object.h b/libs/util/include/util/feature/Object.h
new file mode 100644
index 000000000..ca217b4a8
--- /dev/null
+++ b/libs/util/include/util/feature/Object.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_FEATURE_OBJECT_H__
+#define __NNFW_UTIL_FEATURE_OBJECT_H__
+
+#include "util/feature/Shape.h"
+#include "util/feature/Index.h"
+#include "util/feature/Reader.h"
+
+#include <vector>
+
+namespace nnfw
+{
+namespace util
+{
+namespace feature
+{
+
+template<typename T> class Object final : public Reader<T>
+{
+public:
+ using Generator = std::function<T (const Shape &shape, const Index &index)>;
+
+public:
+ Object(const Shape &shape, const Generator &fn) : _shape{shape}
+ {
+ _value.resize(_shape.C * _shape.H * _shape.W);
+
+ for (int32_t ch = 0; ch < _shape.C; ++ch)
+ {
+ for (int32_t row = 0; row < _shape.H; ++row)
+ {
+ for (int32_t col = 0; col < _shape.W; ++col)
+ {
+ _value.at(offsetOf(ch, row, col)) = fn(_shape, Index{ch, row, col});
+ }
+ }
+ }
+ }
+
+public:
+ const Shape &shape(void) const { return _shape; }
+
+public:
+ T at(uint32_t ch, uint32_t row, uint32_t col) const override
+ {
+ return _value.at(offsetOf(ch, row, col));
+ }
+
+private:
+ uint32_t offsetOf(uint32_t ch, uint32_t row, uint32_t col) const
+ {
+ return ch * _shape.H * _shape.W + row * _shape.W + col;
+ }
+
+private:
+ Shape _shape;
+ std::vector<T> _value;
+};
+
+} // namespace feature
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_FEATURE_OBJECT_H__
diff --git a/libs/util/include/util/feature/Reader.h b/libs/util/include/util/feature/Reader.h
new file mode 100644
index 000000000..112503d80
--- /dev/null
+++ b/libs/util/include/util/feature/Reader.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_FEATURE_READER_H__
+#define __NNFW_UTIL_FEATURE_READER_H__
+
+#include <cstdint>
+
+namespace nnfw
+{
+namespace util
+{
+namespace feature
+{
+
+template <typename T> struct Reader
+{
+ virtual ~Reader() = default;
+
+ virtual T at(uint32_t ch, uint32_t row, uint32_t col) const = 0;
+};
+
+} // namespace feature
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_FEATURE_READER_H__
diff --git a/libs/util/include/util/feature/Shape.h b/libs/util/include/util/feature/Shape.h
new file mode 100644
index 000000000..e05c97f51
--- /dev/null
+++ b/libs/util/include/util/feature/Shape.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_FEATURE_SHAPE_H__
+#define __NNFW_UTIL_FEATURE_SHAPE_H__
+
+#include <cstdint>
+
+namespace nnfw
+{
+namespace util
+{
+namespace feature
+{
+
+struct Shape
+{
+ int32_t C; // Depth
+ int32_t H; // Height
+ int32_t W; // Width
+
+ Shape() = default;
+ Shape(int32_t depth, int32_t height, int32_t width) : C{depth}, H{height}, W{width}
+ {
+ // DO NOTHING
+ }
+
+};
+
+} // namespace feature
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_FEATURE_H__
diff --git a/libs/util/include/util/feature/TextFormatter.h b/libs/util/include/util/feature/TextFormatter.h
new file mode 100644
index 000000000..91b4c9fff
--- /dev/null
+++ b/libs/util/include/util/feature/TextFormatter.h
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_FEATURE_TEXT_FORMATTER_H__
+#define __NNFW_UTIL_FEATURE_TEXT_FORMATTER_H__
+
+#include "util/feature/Shape.h"
+#include "util/feature/Reader.h"
+
+#include <ostream>
+#include <iomanip>
+#include <limits>
+
+namespace nnfw
+{
+namespace util
+{
+namespace feature
+{
+
+template <typename T> class TextFormatter
+{
+public:
+ TextFormatter(const Shape &shape, const Reader<T> &data)
+ : _shape(shape), _data(data)
+ {
+ // DO NOTHING
+ }
+
+public:
+ const Shape &shape(void) const { return _shape; }
+ const Reader<T> &data(void) const { return _data; }
+
+private:
+ const Shape &_shape;
+ const Reader<T> &_data;
+};
+
+template <typename T>
+std::ostream &operator<<(std::ostream &os, const TextFormatter<T> &fmt)
+{
+ const auto &shape = fmt.shape();
+
+ for (uint32_t ch = 0; ch < shape.C; ++ch)
+ {
+ os << " Channel " << ch << ":" << std::endl;
+ for (uint32_t row = 0; row < shape.H; ++row)
+ {
+ os << " ";
+ for (uint32_t col = 0; col < shape.W; ++col)
+ {
+ const auto value = fmt.data().at(ch, row, col);
+ os << std::right;
+ os << std::fixed;
+ os << std::setw(std::numeric_limits<T>::digits10 + 2);
+ os << std::setprecision(5);
+ os << value;
+ os << " ";
+ }
+ os << std::endl;
+ }
+ }
+
+ return os;
+}
+
+} // namespace feature
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_FEATURE_TEXT_FORMATTER_H__
diff --git a/libs/util/include/util/fp32.h b/libs/util/include/util/fp32.h
new file mode 100644
index 000000000..604435470
--- /dev/null
+++ b/libs/util/include/util/fp32.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_FP32_H__
+#define __NNFW_UTIL_FP32_H__
+
+#include <cmath>
+#include <cfloat>
+#include <algorithm>
+#include <cstdint>
+
+namespace nnfw
+{
+namespace util
+{
+namespace fp32
+{
+
+inline float relative_diff(float lhs, float rhs)
+{
+ const auto diff = std::fabs(lhs - rhs);
+ const auto base = std::max(std::fabs(lhs), std::fabs(rhs));
+
+ return diff / base;
+}
+
+inline bool epsilon_equal(float expected, float obtained, uint32_t tolerance = 1)
+{
+ if (std::isnan(expected) && std::isnan(obtained))
+ {
+ return true;
+ }
+
+ // Let's use relative epsilon comparision
+ const auto diff = std::fabs(expected - obtained);
+ const auto max = std::max(std::fabs(expected), std::fabs(obtained));
+
+ return diff <= (max * FLT_EPSILON * tolerance);
+}
+
+inline bool absolute_epsilon_equal(float expected, float obtained, float tolerance = 0.001)
+{
+ if (std::isnan(expected) && std::isnan(obtained))
+ {
+ return true;
+ }
+
+ // Let's use absolute epsilon comparision
+ const auto diff = std::fabs(expected - obtained);
+
+ return diff <= tolerance;
+}
+
+} // namespace fp32
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_FP32_H__
diff --git a/libs/util/include/util/kernel/IndexIterator.h b/libs/util/include/util/kernel/IndexIterator.h
new file mode 100644
index 000000000..ea6b48826
--- /dev/null
+++ b/libs/util/include/util/kernel/IndexIterator.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_KERNEL_INDEX_ITERATOR_H__
+#define __NNFW_UTIL_KERNEL_INDEX_ITERATOR_H__
+
+#include "util/kernel/Shape.h"
+
+namespace nnfw
+{
+namespace util
+{
+namespace kernel
+{
+
+class IndexIterator
+{
+public:
+ IndexIterator(const Shape &shape) : _shape{shape}
+ {
+ // DO NOTHING
+ }
+
+public:
+ template <typename Callable> IndexIterator &iter(Callable cb)
+ {
+ for (uint32_t nth = 0; nth < _shape.N; ++nth)
+ {
+ for (uint32_t ch = 0; ch < _shape.C; ++ch)
+ {
+ for (uint32_t row = 0; row < _shape.H; ++row)
+ {
+ for (uint32_t col = 0; col < _shape.W; ++col)
+ {
+ cb(nth, ch, row, col);
+ }
+ }
+ }
+ }
+
+ return (*this);
+ }
+
+private:
+ const Shape _shape;
+};
+
+IndexIterator iterate(const Shape &shape) { return IndexIterator{shape}; }
+
+template <typename Callable> IndexIterator &operator<<(IndexIterator &&it, Callable cb)
+{
+ return it.iter(cb);
+}
+
+} // namespace kernel
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_FEATURE_INDEX_ITERATOR_H__
diff --git a/libs/util/include/util/kernel/RandomObject.h b/libs/util/include/util/kernel/RandomObject.h
new file mode 100644
index 000000000..ceed7a0b0
--- /dev/null
+++ b/libs/util/include/util/kernel/RandomObject.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_KERNEL_RANDOM_OBJECT_H__
+#define __NNFW_UTIL_KERNEL_RANDOM_OBJECT_H__
+
+#include "util/kernel/Shape.h"
+#include "util/kernel/Reader.h"
+
+#include <vector>
+
+namespace nnfw
+{
+namespace util
+{
+namespace kernel
+{
+
+template<typename T> class RandomObject final : public Reader<T>
+{
+public:
+ RandomObject(const Shape &shape) : _shape{shape}
+ {
+ const uint32_t size = _shape.N * _shape.C * _shape.H * _shape.W;
+
+ // TODO Use random number
+ for (uint32_t off = 0; off < size; ++off)
+ {
+ _value.emplace_back(static_cast<float>(off));
+ }
+ }
+
+public:
+ const Shape &shape(void) const { return _shape; }
+
+public:
+ T at(uint32_t nth, uint32_t ch, uint32_t row, uint32_t col) const override
+ {
+ uint32_t index = 0;
+
+ index += nth * _shape.C * _shape.H * _shape.W;
+ index += ch * _shape.H * _shape.W;
+ index += row * _shape.W;
+ index += col;
+
+ return _value.at(index);
+ }
+
+private:
+ const Shape _shape;
+ std::vector<T> _value;
+};
+
+} // namespace kernel
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_KERNEL_RANDOM_OBJECT_H__
diff --git a/libs/util/include/util/kernel/Reader.h b/libs/util/include/util/kernel/Reader.h
new file mode 100644
index 000000000..9d8f33ad6
--- /dev/null
+++ b/libs/util/include/util/kernel/Reader.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_KERNEL_READER_H__
+#define __NNFW_UTIL_KERNEL_READER_H__
+
+#include <cstdint>
+
+namespace nnfw
+{
+namespace util
+{
+namespace kernel
+{
+
+template <typename T> struct Reader
+{
+ virtual ~Reader() = default;
+
+ virtual T at(uint32_t nth, uint32_t ch, uint32_t row, uint32_t col) const = 0;
+};
+
+} // namespace kernel
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_KERNEL_READER_H__
diff --git a/libs/util/include/util/kernel/Shape.h b/libs/util/include/util/kernel/Shape.h
new file mode 100644
index 000000000..bd2332989
--- /dev/null
+++ b/libs/util/include/util/kernel/Shape.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_KERNEL_SHAPE_H__
+#define __NNFW_UTIL_KERNEL_SHAPE_H__
+
+#include <cstdint>
+
+namespace nnfw
+{
+namespace util
+{
+namespace kernel
+{
+
+struct Shape
+{
+ int32_t N;
+ int32_t C;
+ int32_t H;
+ int32_t W;
+
+ Shape() = default;
+ Shape(int32_t count, int32_t depth, int32_t height, int32_t width)
+ : N{count}, C{depth}, H{height}, W{width}
+ {
+ // DO NOTHING
+ }
+};
+
+} // namespace kernel
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_KERNEL_SHAPE_H__
diff --git a/libs/util/include/util/tensor/Index.h b/libs/util/include/util/tensor/Index.h
new file mode 100644
index 000000000..e74b09229
--- /dev/null
+++ b/libs/util/include/util/tensor/Index.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_TENSOR_INDEX_H__
+#define __NNFW_UTIL_TENSOR_INDEX_H__
+
+#include <cstdint>
+#include <cstddef>
+
+#include <vector>
+#include <initializer_list>
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+struct Index
+{
+public:
+ Index(size_t rank)
+ {
+ _offsets.resize(rank);
+ }
+
+public:
+ Index(std::initializer_list<int32_t> offsets) : _offsets{offsets}
+ {
+ // DO NOTHING
+ }
+
+public:
+ size_t rank(void) const { return _offsets.size(); }
+
+public:
+ int32_t at(size_t n) const { return _offsets.at(n); }
+ int32_t &at(size_t n) { return _offsets.at(n); }
+
+private:
+ std::vector<int32_t> _offsets;
+};
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_TENSOR_INDEX_H__
diff --git a/libs/util/include/util/tensor/IndexFormatter.h b/libs/util/include/util/tensor/IndexFormatter.h
new file mode 100644
index 000000000..8014a42b6
--- /dev/null
+++ b/libs/util/include/util/tensor/IndexFormatter.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_TENSOR_INDEX_FORMATTER_H__
+#define __NNFW_UTIL_TENSOR_INDEX_FORMATTER_H__
+
+#include "util/tensor/Index.h"
+
+#include <ostream>
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+class IndexFormatter
+{
+public:
+ IndexFormatter(const nnfw::util::tensor::Index &index) : _index(index)
+ {
+ // DO NOTHING
+ }
+
+public:
+ const nnfw::util::tensor::Index &index(void) const { return _index; }
+
+private:
+ const nnfw::util::tensor::Index &_index;
+};
+
+std::ostream &operator<<(std::ostream &os, const IndexFormatter &fmt);
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_TENSOR_INDEX_FORMATTER_H__
diff --git a/libs/util/include/util/tensor/IndexIterator.h b/libs/util/include/util/tensor/IndexIterator.h
new file mode 100644
index 000000000..56a8c7dd2
--- /dev/null
+++ b/libs/util/include/util/tensor/IndexIterator.h
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_TENSOR_INDEX_ITERATOR_H__
+#define __NNFW_UTIL_TENSOR_INDEX_ITERATOR_H__
+
+#include "util/tensor/Shape.h"
+#include "util/tensor/Index.h"
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+class IndexIterator
+{
+public:
+ IndexIterator(const Shape &shape) : _shape(shape)
+ {
+ // DO NOTHING
+ }
+
+public:
+ // Allow move, but disallow copy
+ IndexIterator(IndexIterator &&) = default;
+ IndexIterator(const IndexIterator &) = delete;
+
+public:
+ template <typename Callable> IndexIterator &iter(Callable fn)
+ {
+ Index index(_shape.rank());
+
+ for (size_t d = 0; d < _shape.rank(); ++d)
+ {
+ index.at(d) = 0;
+ }
+
+ size_t cursor = 0;
+
+ while (cursor < _shape.rank())
+ {
+ fn(index);
+
+ if (index.at(cursor) + 1 < _shape.dim(cursor))
+ {
+ index.at(cursor) += 1;
+ }
+ else
+ {
+ while ((cursor < _shape.rank()) && (index.at(cursor) + 1 == _shape.dim(cursor)))
+ {
+ ++cursor;
+ }
+
+ if (cursor == _shape.rank())
+ {
+ break;
+ }
+
+ index.at(cursor) += 1;
+
+ for (size_t d = 0; d < cursor; ++d)
+ {
+ index.at(d) = 0;
+ }
+
+ cursor = 0;
+ }
+ }
+
+ return (*this);
+ }
+
+private:
+ const Shape &_shape;
+};
+
+inline IndexIterator iterate(const Shape &shape) { return IndexIterator{shape}; }
+
+template <typename Callable> IndexIterator &operator<<(IndexIterator &&it, Callable cb)
+{
+ return it.iter(cb);
+}
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_TENSOR_INDEX_ITERATOR_H__
diff --git a/libs/util/include/util/tensor/NonIncreasingStride.h b/libs/util/include/util/tensor/NonIncreasingStride.h
new file mode 100644
index 000000000..ff013ffa2
--- /dev/null
+++ b/libs/util/include/util/tensor/NonIncreasingStride.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_TENSOR_NON_INCREASING_STRIDE_H__
+#define __NNFW_UTIL_TENSOR_NON_INCREASING_STRIDE_H__
+
+#include "util/tensor/Shape.h"
+#include "util/tensor/Index.h"
+
+#include <vector>
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+// As its name suggests, stride[N-1] >= stride[N] holds for all N < rank in NonIncreasingStride.
+class NonIncreasingStride
+{
+public:
+ void init(const Shape &shape)
+ {
+ _stride.resize(shape.rank());
+ _stride.at(shape.rank() - 1) = 1;
+
+ for (uint32_t axis = shape.rank() - 1; axis > 0; --axis)
+ {
+ _stride.at(axis - 1) = _stride.at(axis) * shape.dim(axis);
+ }
+ }
+
+public:
+ uint32_t at(uint32_t axis) const { return _stride.at(axis); }
+
+public:
+ uint32_t offset(const Index &index) const;
+
+private:
+ std::vector<uint32_t> _stride;
+};
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_TENSOR_NON_INCREASING_STRIDE_H__
diff --git a/libs/util/include/util/tensor/Object.h b/libs/util/include/util/tensor/Object.h
new file mode 100644
index 000000000..839bce236
--- /dev/null
+++ b/libs/util/include/util/tensor/Object.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_TENSOR_OBJECT_H__
+#define __NNFW_UTIL_TENSOR_OBJECT_H__
+
+#include "util/tensor/Shape.h"
+#include "util/tensor/Index.h"
+#include "util/tensor/IndexIterator.h"
+#include "util/tensor/NonIncreasingStride.h"
+#include "util/tensor/Reader.h"
+
+#include <vector>
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+template<typename T> class Object final : public Reader<T>
+{
+public:
+ using Generator = std::function<T (const Shape &shape, const Index &index)>;
+
+public:
+ Object(const Shape &shape, const Generator &fn) : _shape{shape}
+ {
+ // Set 'stride'
+ _stride.init(shape);
+
+ // Pre-allocate buffer
+ _values.resize(_shape.dim(0) * _stride.at(0));
+
+ // Set 'value'
+ iterate(_shape) << [this, &fn] (const Index &index)
+ {
+ _values.at(_stride.offset(index)) = fn(_shape, index);
+ };
+ }
+
+public:
+ const Shape &shape(void) const { return _shape; }
+
+public:
+ T at(const Index &index) const override
+ {
+ return _values.at(_stride.offset(index));
+ }
+
+private:
+ Shape _shape;
+ NonIncreasingStride _stride;
+
+private:
+ std::vector<T> _values;
+};
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_FEATURE_OBJECT_H__
diff --git a/libs/util/include/util/tensor/Reader.h b/libs/util/include/util/tensor/Reader.h
new file mode 100644
index 000000000..654214880
--- /dev/null
+++ b/libs/util/include/util/tensor/Reader.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_TENSOR_READER_H__
+#define __NNFW_UTIL_TENSOR_READER_H__
+
+#include "util/tensor/Index.h"
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+template <typename T> struct Reader
+{
+ virtual ~Reader() = default;
+
+ virtual T at(const Index &index) const = 0;
+};
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_TENSOR_READER_H__
diff --git a/libs/util/include/util/tensor/Shape.h b/libs/util/include/util/tensor/Shape.h
new file mode 100644
index 000000000..d4edeaada
--- /dev/null
+++ b/libs/util/include/util/tensor/Shape.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_TENSOR_SHAPE_H__
+#define __NNFW_UTIL_TENSOR_SHAPE_H__
+
+#include <cstdint>
+#include <cstddef>
+#include <vector>
+#include <initializer_list>
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+class Shape
+{
+public:
+ Shape(size_t rank)
+ {
+ _dimensions.resize(rank);
+ }
+
+public:
+ Shape(const std::initializer_list<int32_t> &dimensions) : _dimensions{dimensions}
+ {
+ // DO NOTHING
+ }
+
+public:
+ size_t rank(void) const { return _dimensions.size(); }
+
+public:
+ int32_t dim(size_t n) const { return _dimensions.at(n); }
+ int32_t &dim(size_t n) { return _dimensions.at(n); }
+
+private:
+ std::vector<int32_t> _dimensions;
+};
+
+bool operator==(const Shape &, const Shape &);
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_TENSOR_SHAPE_H__
diff --git a/libs/util/include/util/tensor/Zipper.h b/libs/util/include/util/tensor/Zipper.h
new file mode 100644
index 000000000..fc2d94e57
--- /dev/null
+++ b/libs/util/include/util/tensor/Zipper.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_TENSOR_ZIPPER_H__
+#define __NNFW_UTIL_TENSOR_ZIPPER_H__
+
+#include "util/tensor/Index.h"
+#include "util/tensor/IndexIterator.h"
+#include "util/tensor/Reader.h"
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+template <typename T> class Zipper
+{
+public:
+ Zipper(const Shape &shape, const Reader<T> &lhs, const Reader<T> &rhs)
+ : _shape{shape}, _lhs{lhs}, _rhs{rhs}
+ {
+ // DO NOTHING
+ }
+
+public:
+ template <typename Callable> void zip(Callable cb) const
+ {
+ iterate(_shape) << [this, &cb] (const Index &index)
+ {
+ cb(index, _lhs.at(index), _rhs.at(index));
+ };
+ }
+
+private:
+ const Shape &_shape;
+ const Reader<T> &_lhs;
+ const Reader<T> &_rhs;
+};
+
+template<typename T, typename Callable>
+const Zipper<T> &operator<<(const Zipper<T> &zipper, Callable cb)
+{
+ zipper.zip(cb);
+ return zipper;
+}
+
+template<typename T>
+Zipper<T> zip(const Shape &shape, const Reader<T> &lhs, const Reader<T> &rhs)
+{
+ return Zipper<T>{shape, lhs, rhs};
+}
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_TENSOR_ZIPPER_H__
diff --git a/libs/util/include/util/vector.h b/libs/util/include/util/vector.h
new file mode 100644
index 000000000..49a58a41e
--- /dev/null
+++ b/libs/util/include/util/vector.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_VECTOR_H__
+#define __NNFW_UTIL_VECTOR_H__
+
+#include <vector>
+
+template <typename T>
+bool operator==(const std::vector<T> &lhs, const std::vector<T> &rhs)
+{
+ if (lhs.size() != rhs.size())
+ {
+ return false;
+ }
+
+ for (size_t ind = 0; ind < lhs.size(); ++ind)
+ {
+ if (lhs.at(ind) != rhs.at(ind))
+ {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+#endif // __NNFW_UTIL_VECTOR_H__
diff --git a/libs/util/include/util/vector/Object.h b/libs/util/include/util/vector/Object.h
new file mode 100644
index 000000000..b1bc521da
--- /dev/null
+++ b/libs/util/include/util/vector/Object.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_VECTOR_OBJECT_H__
+#define __NNFW_UTIL_VECTOR_OBJECT_H__
+
+#include "util/vector/Reader.h"
+
+#include <vector>
+#include <functional>
+
+namespace nnfw
+{
+namespace util
+{
+namespace vector
+{
+
+template<typename T> class Object final : public Reader<T>
+{
+public:
+ using Generator = std::function<T (int32_t size, int32_t offset)>;
+
+public:
+ Object(int32_t size, const Generator &gen) : _size{size}
+ {
+ _value.resize(_size);
+
+ for (int32_t offset = 0; offset < size; ++offset)
+ {
+ _value.at(offset) = gen(size, offset);
+ }
+ }
+
+public:
+ int32_t size(void) const { return _size; }
+
+public:
+ T at(uint32_t nth) const override { return _value.at(nth); }
+
+private:
+ const int32_t _size;
+ std::vector<T> _value;
+};
+
+} // namespace vector
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_VECTOR_OBJECT_H__
diff --git a/libs/util/include/util/vector/Reader.h b/libs/util/include/util/vector/Reader.h
new file mode 100644
index 000000000..a3c5cb359
--- /dev/null
+++ b/libs/util/include/util/vector/Reader.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __NNFW_UTIL_VECTOR_READER_H__
+#define __NNFW_UTIL_VECTOR_READER_H__
+
+#include <cstdint>
+
+namespace nnfw
+{
+namespace util
+{
+namespace vector
+{
+
+template <typename T> struct Reader
+{
+ virtual ~Reader() = default;
+
+ virtual T at(uint32_t nth) const = 0;
+};
+
+} // namespace vector
+} // namespace util
+} // namespace nnfw
+
+#endif // __NNFW_UTIL_VECTOR_READER_H__
diff --git a/libs/util/src/environment.cpp b/libs/util/src/environment.cpp
new file mode 100644
index 000000000..dca6c5c55
--- /dev/null
+++ b/libs/util/src/environment.cpp
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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 <string.h>
+#include <cstdlib>
+#include <string>
+
+#include "util/environment.h"
+
+namespace nnfw
+{
+namespace util
+{
+
+int get_env_int(const char* name)
+{
+ const char *value = std::getenv(name);
+ if (value != nullptr)
+ return std::stoi(value);
+ return 0;
+}
+
+bool get_env_bool(const char* name)
+{
+ const char *value = std::getenv(name);
+ if (value != nullptr)
+ {
+ if (std::stoi(value))
+ return true;
+ if (!strcasecmp(value, "true"))
+ return true;
+ }
+ return false;
+}
+
+} // namespace util
+} // namespace nnfw
+
+namespace nnfw
+{
+namespace util
+{
+namespace env
+{
+
+IntAccessor::IntAccessor(const std::string &tag) : _tag{tag}
+{
+ // DO NOTHING
+}
+
+bool IntAccessor::access(int &out) const
+{
+ auto value = std::getenv(_tag.c_str());
+
+ if (value == nullptr)
+ {
+ return false;
+ }
+
+ out = std::stoi(value);
+ return true;
+}
+
+} // namespace env
+} // namespace util
+} // namespace nnfw
diff --git a/libs/util/src/tensor/IndexFormatter.cpp b/libs/util/src/tensor/IndexFormatter.cpp
new file mode 100644
index 000000000..66ff80771
--- /dev/null
+++ b/libs/util/src/tensor/IndexFormatter.cpp
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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 "util/tensor/IndexFormatter.h"
+
+#include <cassert>
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+std::ostream &operator<<(std::ostream &os, const IndexFormatter &fmt)
+{
+ const auto rank = fmt.index().rank();
+
+ assert(rank > 0);
+
+ os << fmt.index().at(0);
+
+ if (rank > 1)
+ {
+ for (uint32_t axis = 1; axis < rank; ++axis)
+ {
+ os << ", " << fmt.index().at(axis);
+ }
+ }
+
+ return os;
+}
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw
diff --git a/libs/util/src/tensor/NonIncreasingStride.cpp b/libs/util/src/tensor/NonIncreasingStride.cpp
new file mode 100644
index 000000000..3774ded83
--- /dev/null
+++ b/libs/util/src/tensor/NonIncreasingStride.cpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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 "util/tensor/NonIncreasingStride.h"
+
+#include <cassert>
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+uint32_t NonIncreasingStride::offset(const Index &index) const
+{
+ const size_t rank = _stride.size();
+
+ assert(index.rank() == rank);
+
+ uint32_t offset = 0;
+
+ for (size_t axis = 0; axis < rank; ++axis)
+ {
+ offset += _stride.at(axis) * index.at(axis);
+ }
+
+ return offset;
+}
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw
diff --git a/libs/util/src/tensor/Shape.cpp b/libs/util/src/tensor/Shape.cpp
new file mode 100644
index 000000000..d177d1382
--- /dev/null
+++ b/libs/util/src/tensor/Shape.cpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. 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 "util/tensor/Shape.h"
+
+namespace nnfw
+{
+namespace util
+{
+namespace tensor
+{
+
+bool operator==(const Shape &lhs, const Shape &rhs)
+{
+ if (lhs.rank() != rhs.rank())
+ {
+ return false;
+ }
+
+ for (size_t axis = 0; axis < lhs.rank(); ++axis)
+ {
+ if(lhs.dim(axis) != rhs.dim(axis))
+ {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+} // namespace tensor
+} // namespace util
+} // namespace nnfw