add the Stack op

include/tim/vx/ops/stack.h

@@ -0,0 +1,44 @@
+/****************************************************************************
+*
+*    Copyright (c) 2020 Vivante Corporation
+*
+*    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 TIM_VX_OPS_STACK_H_
+#define TIM_VX_OPS_STACK_H_
+#include "tim/vx/operation.h"
+
+namespace tim {
+namespace vx {
+namespace ops {
+
+class Stack : public Operation {
+ public:
+  Stack(Graph* graph, uint32_t axis, int input_cnt);
+
+ protected:
+  uint32_t axis_;
+};
+
+}  // namespace ops
+}  // namespace vx
+}  // namespace tim
+
+#endif /* TIM_VX_OPS_STACK_H_ */

src/tim/vx/ops/README.md

@@ -83,7 +83,7 @@ Select|SELECT|Mapped
 ||LSTMUNIT_OVXLIB|Unmapped
 ||TENSOR_ADD_MEAN_STDDEV_NORM|Unmapped
 Relu1|RELU1|Mapped
-||STACK|Unmapped
+Stack|STACK|Mapped
 ||FLOOR|Unmapped
 Square|SQUARE|Mapped
 Neg|NEG|Mapped

src/tim/vx/ops/stack.cc

@@ -0,0 +1,40 @@
+/****************************************************************************
+*
+*    Copyright (c) 2020 Vivante Corporation
+*
+*    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 "tim/vx/ops/stack.h"
+
+#include "operation_private.h"
+#include "vsi_nn_pub.h"
+
+namespace tim {
+namespace vx {
+namespace ops {
+
+Stack::Stack(Graph* graph, uint32_t axis, int input_cnt)
+    : Operation(graph, VSI_NN_OP_STACK, input_cnt, 1), axis_(axis) {
+  this->impl()->node()->nn_param.stack.axis = axis_;
+}
+
+}  // namespace ops
+}  // namespace vx
+}  // namespace tim