* constant + pad

* adding broadcast test back

* Implement TopK.

* Update python wrappers for TopK, ArgMin and ArgMax.

* Address some reviewer comments.

* Add type property check tests for TopK.
Set correct TopK behavior for K==0.

* TopK: Add 1d and 3d unit tests.

* Address more reviewer comments.

* Apply code style.

* onnx: add missing header files
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnxifi: implementation of onnxGetBackendIDs
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnxifi: add unit tests for onnxGetBackendIDs
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnxifi: change std::out_of_range to std::length_error
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnxifi: after review changes
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* simplify result copy elimination

* gpu fix

* remove include header

* circumvent gpu issue

* add a whitepace

* add cuda reduce

* clang format

* fix bugs

* fix bug

* add 1d reduce

* clang format

* fix bugs

* unroll loop

* remove debug info

* revert tests

* unroll 1D reduce op

* add comments

* using cudnn for nd to scalar reduction

* remove cuda 1d reduction since cudnn version is faster

* remove 1D kernel

* fix bugs

* 1d multi block size

* remove debug

* change kernel name

* add reduce to scalar optimization, add test

* fix bugs and tune parameters

* clang format

* update comments

* update comments

* update comments

* clang format

* update comments

* remove wrong comments, apply clang format

* resolve Bob's comment

* clang format

* pass shared mem size from cuLaunchKernel, set unroll loop size through host code

* remove unused code.clang format

* change reduce to thread with shfl for each warp first

* add seed

* unroll size

* IntelGPU backend: Sum operation optimization

* PR1545. Comments addressed. Test added. Helper function refactored.

* Move reshape utils down to reshape namespace.

* Reshape operation.

* Reshape operator binding.

* Error fixes.

* Reshape unit tests.

* Move flatten utility function to reshape namespace.

* Fix unused catched exception object

* Add Constant support for int64

* Review fix.

* clang-format

* Review fix part 2.

* Enable output shape as a second node input (only Constant).

* Unit test for "dynamic" output shape (from Constant node).

* Review fixes.

* Make sure second Reshape op input is Constant node.

* Validate/infer types as a virtual function
BroadcastLike, ScalarConstantLike
Set output shape separately from output types
Remove some obsolete tests
Replace *Like ops with fixed type versions

* Review comments

* Remove TensorViewType

* Remove PrimaryTensorView

* Reviewer comments

* Style fix.

* Another try at GPU

* GPU

* Simplify class hierarchy

* More of previous.

* Better errors

* Remove unneeded classes

* Merge

* Update Python bindings

* clang-format

* Remove redundant files

* Remove commented out lines

* clang-format

* Group includes

* Missing tests

* Merge error

* [ONNX] Concat operator

* Style fix

* use line comments instead of multiline comments for license header

* update more

* update new files

* more header updates

* style

* normalize doxygen keywords

* more normalization

* normalize more onnx files

* yet more normalization

* fix doxygen error

* [ONNX] Sum op

* [ONNX] Generic variadic op template

* Add support for Min op

* clang-format

* Add support for Max op

* Add support for Mean op

* Docs, code cleanup

* Docs, code cleanup

disabled RNN test to workaround RNN unit test failure on MAC due to bug in MKLDNN scratchpad creation (#1502)

* address klocwork warning

* fix PR comments

* [ONNX] Softmax operator

* Review fix pt. 1

* Review fix pt. 2

* Add softmax test

* Update onnx_import.cpp

* normalize comments

* address review comments

* [ONNX] MatMul operator

* Add NL on EOF

* Review fix pt. 1

* add detection of Linux distribution
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: disable ONNX unit-tests if CentOS detected (temporar solution)
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: correct DISTRIB_ID name for CentOS
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* Enable Mul OP

* Reshape, broadcasting utils and Gemm op

* Style check

* Review fix pt. 1

* Review fix pt. 2

* Reuse documentation

Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* Move batch_norm implementation to a .cpp file
* Move split implementation to a .cpp file

* [ONNX] Refactor exceptions

* [ONNX] Attribute helper functions

* [ONNX] Convolution operation

* onnx: fix build for CentOS 7.4
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: fix build for CentOS 7.4
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: compile fix for CentOS 7
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: unit-test compilation fixes for CentOS 7
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: unit-test compilation fixes for CentOS 7
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: fix 'add abc initializer' unit test
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* onnx: fix code style
Signed-off-by: Artur Wojcik <artur.wojcik@intel.com>

* argmax

* manifests and serailizer

This reverts commit 5ab5a129.

* static link cpu library to ngraph

* remove debug

* link ngraph and cpu backend into a single shared object

* add -fPIC and whole-archive for CPU backend

* Added conditional for --whole-archive for Mac OS.

* Added more conditonal for MacOS.

* fix linking problem and unit test failures caused by multiple copies of the same function in CPU backend and INTERPRETER

* fix nbench build

* add nbench to unit test build

* add version number to libngraph

* argmin

* address feedbacka argmin

* add new lines

*  addnew lines

* address adam's nitpicks

* scott's feedback

* fix unit tests

* [ONNX] Add Relu op

* Backend test: MaxPoolBackprop test strided and padded

* PR1428. Test excluded from CPU backend