* - Added sigmoid fusion pass
- added mkldnn emitter code for sigmoid

* - corrected sigmoid expected values
- add layout assignment for sigmoid op

* - added assert's in cpu fusion for sigmoid
- style fix

* remove debug prints

* NGMX-371 #comment addressed PR comments - Added sigmoid unit test case with 3D input ii) support in cpu_emmiter for sigmoid to handle all input shapes

* NGMX-371 #comment use shape_size() to calculate the 1d input size

Jbobba/batchnorm layouts

* remove broadcast from matmulbias

* fix comments

* working gemm-based broadcast

* fix clang warning

* straightforward gpu.cos implementation following previous patterns prior to refactor

* Generalized unary elementwise gpu op impl.. New unary elementwise ops can
be added to the type annotations in gpu_cuda_kernel_ops.hpp. Next step
is to refactor the llvm interface in gpu_emitters.hpp for similar generality.

* Added gpu_emitter.hpp:EmitUnaryElementwise.

Function adds cuda kernel based on ngraph::op::op_type::description.
This can service all unary elementwise ops run on the gpu.

* The following elementwise unary ops now use the EmitUnaryElementwise emitter:
* GPU.abs
* GPU.acos
* GPU.asin
* GPU.atan
* GPU.ceiling
* GPU.cos
* GPU.cosh
* GPU.exp
* GPU.floor
* GPU.log
* GPU.not
* GPU.sign
* GPU.sin
* GPU.sinh
* GPU.tan
* GPU.tanh
Unary elementwise ops Sign and Not need extra consideration.

* tanh test changed to test::all_close for fp comparison (also done for tan in commit 65fa7c6de34c8277fe2a4801644f6bb64574f4ff).

* GPU backend skips added for recent softmax test and updated aliased output test that uses op::Constant.

* code format update

* changed cuda builder interface names to unary/binary/arbitrary, added impl. note to gpu_cuda_kernel_ops, cleaned code format

* updated ngraph-cpp reference

* Fixing incorrect github conflict resolution.

* Added GPU emitter for op::Result.
For now it simply copies the output tensor.

All but 3 tests now pass. The remaining
failing tests are:
* GPU.dot_0_0
* GPU.dot_matrix_2x0_0x2
* GPU.dot_2x0_0

* Removed call to handle memory aliasing in gpu_external_function.

* fix gpu emitter bug that will return in the middle of function

* Merge pull request #609 from NervanaSystems/tfl/fix_return_bug

fix gpu emitter bug that will return in the middle of function

* GPU backend skips added for recent softmax test and updated aliased output test that uses op::Constant.

Fix constant bug on GPU

* Added GPU emitter for op::Result.
For now it simply copies the output tensor.

All but 3 tests now pass. The remaining
failing tests are:
* GPU.dot_0_0
* GPU.dot_matrix_2x0_0x2
* GPU.dot_2x0_0

* Removed call to handle memory aliasing in gpu_external_function.

* fix gpu emitter bug that will return in the middle of function

* Merge pull request #609 from NervanaSystems/tfl/fix_return_bug

fix gpu emitter bug that will return in the middle of function

* GPU backend skips added for recent softmax test and updated aliased output test that uses op::Constant.

* - Added support optimized bn mkldnn implementation in cpu emitter
- modified bn unit_test to support new implementation
- added layout assignment for bn op
- Style Fix

(cherry picked from commit 7747a40806d62c126059d5c873adcd2e61a0adb0)

* modified value initilization in cpu_fusion to be float explicit

(cherry picked from commit 03499d380073d0197ab8cbd154eb03f63b042a48)

* fix compilation issue

* Addressed PR comments
- added exception if gamma and beta layout isnot equal to memory::format::x
- throw exception if bn Op is not mkldnn op

* fix compilation issue

* added support to handle multiple o/ps in fprop bn fusion

* - Removed laytout pass for bn
- fixed autodiff bug in bn
- added "Add" for the dispatcher in cpu-layout pass

* style fix

* Fix bprop batchnorm test with get_output_elements

* Style fix

* CPU: Padded Convolution fusion

* CPU: Non-reshaped fusion pattern for zero-padded convolutions

* CPU: Refactor consistency checks

* CPU: Rewrite hoisted reshape expression and add tests

* CPU: Merge leftovers

* generalize matmulbias

fixes

disable logging

* unit-test failures

* the first stab at op::Result

format fixes

disabling logging

op::Result, 2nd attempt

purge stale code

disable logging

fix copyright header

* initial cleanup

* cleanup2

* remove dead code

* result.cpp, fix comments

* fix comment

* patch working

* wip

* fix patcher

* remove debug message:

* cleanup

* fix typo

Merge branch 'tfl/gpu_fix_constant_bug' of github.com:NervanaSystems/ngraph-cpp into tfl/gpu_fix_constant_bug

* add gpu broadcast

* add broadcast kernel

* fix bug for cumemdopyDtD usage in gpu_external_function.cpp

* limited parallel make processes to make -j 16 by default for contrib/docker/Makefile

* set the default to make -j 22 for parallel make in contrib/docker/Makefile

* cleanup

* cleanup

* fix all headers to be standalone as far as includes go

* include cleanup

* cleanup includes

* cleanup

* include tester

* wip

* cleanup

* cleanup

* cleanup