summaryrefslogtreecommitdiff
path: root/runtimes/pure_arm_compute/src/internal/nnapi/tensor/View.h
diff options
context:
space:
mode:
Diffstat (limited to 'runtimes/pure_arm_compute/src/internal/nnapi/tensor/View.h')
-rw-r--r--runtimes/pure_arm_compute/src/internal/nnapi/tensor/View.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/runtimes/pure_arm_compute/src/internal/nnapi/tensor/View.h b/runtimes/pure_arm_compute/src/internal/nnapi/tensor/View.h
new file mode 100644
index 000000000..80e1bb057
--- /dev/null
+++ b/runtimes/pure_arm_compute/src/internal/nnapi/tensor/View.h
@@ -0,0 +1,88 @@
+/*
+ * 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 __INTERNAL_NNAPI_TENSOR_VIEW_H__
+#define __INTERNAL_NNAPI_TENSOR_VIEW_H__
+
+#include "util/tensor/Shape.h"
+#include "util/tensor/Index.h"
+
+namespace internal
+{
+namespace nnapi
+{
+namespace tensor
+{
+
+template <typename T> class View
+{
+public:
+ // NOTE The parameter len denotes the number of bytes.
+ View(const ::nnfw::util::tensor::Shape &shape, T *ptr, size_t len) : _shape{shape}, _ptr{ptr}
+ {
+ assert(shape.element_nums() * sizeof(T) == len);
+ }
+
+public:
+ const nnfw::util::tensor::Shape &shape(void) const { return _shape; }
+
+private:
+ uint32_t offset_of(const nnfw::util::tensor::Index &index) const
+ {
+ if (_shape.rank() == 0)
+ {
+ return 0;
+ }
+
+ uint32_t offset = index.at(0);
+
+ // Stride decreases as axis increases in NNAPI
+ for (uint32_t axis = 1; axis < _shape.rank(); ++axis)
+ {
+ offset *= _shape.dim(axis);
+ offset += index.at(axis);
+ }
+
+ return offset;
+ }
+
+public:
+ T at(const nnfw::util::tensor::Index &index) const
+ {
+ const auto offset = offset_of(index);
+
+ return _ptr[offset];
+ }
+
+ T &at(const nnfw::util::tensor::Index &index)
+ {
+ const auto offset = offset_of(index);
+
+ return _ptr[offset];
+ }
+
+private:
+ nnfw::util::tensor::Shape _shape;
+
+private:
+ T *_ptr;
+};
+
+} // namespace tensor
+} // namespace nnapi
+} // namespace internal
+
+#endif // __INTERNAL_NNAPI_TENSOR_VIEW_H__