* REF_CODE_REFACTOR: Leaky_Relu
refactoring the reference code for leaky_relu operator.

BUG=refactoring existing code.

* small nits.

* fix the formatting.
Co-authored-by: NAdvait Jain <advaitjain@google.com>

* REF_CODE_REFACTOR: Circular_buffer
refactoring the refernce code for circular_buffer operator.

BUG=refactoring existing code.

* Formatted the code.
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>
Co-authored-by: NAdvait Jain <advaitjain@google.com>

BUG=Fixes #418

Change path to person detect model header file from example directory to
where it is downloaded.

* binary size check implementation

* doc comment changes
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>

* Some clean up of the test script.

* Have make fail if python script has an error.

Prior to this change, the generate_cc_arrays.py script could fail (for
example because PIL not being installed) but the error would be
silently ignored. Instead, the build would fail much later because of
missing header files and the root cause would be hard to debug.

Follow-up PR will also use this error handling approach for other places
where we call into Python and bash scripts from the make.

BUG=http://b/196630709

* support earlier versions of make.

* Have make also fail if Python script fails.

BUG=http://b/196630709

* debugging error.

* support versions of make < 4.2

* replace some tabs with spaces.

* Update the download script for TFLite Micro person detection example

* Update the download script for TFLite Micro person detection example

* Add option to only do a build for the vision_p6.

BUG=http://b/196459172

* Only build for Vision P6 as part of presubmit checks.

* make running the tests optional.

* fix whitespace.

* Address review comments.

BUG=Fixes #401

Create patch to flatbuffers that enables micro_interpreter_test and memory_helpers_test to run for bluepill architecture (#398)

* Patch flatbuffers to avoid the use of new/delete.
Also patch test_helpers to avoid the virtual delete.

This enables micro_interpreter_test to run for bluepill platform.

BUG=http://b/174707181

* Create patch that enable micro_interpreter_test to run.
The patch assumes all TFLM code provides allocator for
allocate buffer.

* Update patch without extra formatting

Add comments to some magic number in micro_interpreter_test and also attempt to relax some checks (#394)

* Add comments to some magic number in micro_interpreter_test

* Relax some check on the micro_interpreter_test to enable
it pass on xtensa and also add comments on how magic number
comes from.

BUG=http://b/174707181

* Remove redundant header files

* Change from _GE to _LE for better readability

* lstm:Integrate lstm op on TFLM

Ported lstm op from TF GitHub
Signed-off-by: NLukman Rahumathulla <lukmanr@cadence.com>
Signed-off-by: NManjunath CP <manjup@cadence.com>
Signed-off-by: NNiranjan Yadla <nyadla@cadence.com>
Signed-off-by: NRaj Pawate <pawateb@cadence.com>

* Updated code style

* Removed float LSTM implementation, and switched to kernel logging API

* Fixed shift type errors

* Moved LSTM files to xtensa-specific makefile
Co-authored-by: NPete Warden <petewarden@google.com>
Co-authored-by: NPete Warden <pete@petewarden.com>

BUG=fix the docs.

* Refactor Makefile: split the kernel test into its own Makefile.inc.

After this change, only non-test kernel files are in Makefile.

BUG=http://b/195938386

* Add copyright notice to Makefile.inc

This also adds a Hifi3z test script.

BUG=http://b/195937824

* Makefiles and scripts update to work with embARC MLI Library 2.0

* Updated few files to meet repository changes.

BUG=http://b/195937824Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>

* Fix a couple of issues with the BUILD file caught with the Google
buildifier check.

* Add back in layering_check to see if buildifier is happy.

BUG=

* Add special TARGET_ARCH=project_generation to cortex_m_generic.

 * This enables use to use the create_tflm_tree.py script correctly for
   all the examples.
 * The special behavior for project_generation is to also include the
   micro_speech example (and its dependencies) is the list of sources.
 * We do not want to have micro_speech dependencies as part of a
   non-project generation build because it means that
   libtensorflow-microlite.a will have kissfft symbols which can lead to
   symbol collisions.

Also, improved the CI for project generation with cortex_m_generic,
which needed some of the TF_LITE_REMOVE_VIRTUAL_DELETE calls to be moved
from private to public sections.

BUG=http://b/193823889

* addressed review comment.

* Fix setting of the path with readable_run.

* Add files from TfLite

Added batch_matmul.h and tensor_utils_common.h that are needed for the BATCH_MATMUL operator.

* Add FAQ section

Add frequently asked questions section with regard to memory allocation and tensor structure manipulation.

bug=Add FAQ to reference op porting document #383
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>

Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>

* Added Model Adaptation Tool to prepare models before use with embARC MLI Library 2.0

* Fixed formatting for adaptation_tool.py

* Add a new test case for conv operator (#329)

This new test case is based on issue #329 to increase
coverage on optimized kernel's data precision for conv operator.
In this test, input, output and filter are all 8 bits and filter
tensor is of dimension 8x3x3x3 with different scales per output channel.

TESTED= local test with x86 and HiFi4.

* Move large test data variable into its own folder
and use one flat top namespace instead of nested namespace.

BUG=195779890

* Add files from TfLite

Added batch_matmul.h and tensor_utils_common.h that are needed for the BATCH_MATMUL operator.

* Arduino library creation for CI build.
Issue# 256

* fix bug with include file path flattening

* fix examples path generation

Some files in examples source and headers list are not in the examples directory.  They can be tensorflow files or third-party files.  The code is corrected so that these files end up inside the generated directory tree.  Previously, these files were being placed outside the generated directory tree and were thus invisible to follow-on targeted generation scripts.

* remove/revert files that go into the arduino-examples repo

* Format with:

```
tensorflow/lite/micro/tools/ci_build/test_code_style.sh --fix_formatting
```

* request changes to PR

* Removed symbolic link for micro_speech example from Makefile.
Added additional include flags to Makefile.
Adjusted header file transformations during base tree creation.

* Fix formatting.

* Move Arduino specific code to seperate repo

Remove ARDUINO defines.
Fix incorrect NDEBUG use.

Issue  #256

* Fix cortex_m_generic makefile

Fix typo in cortex_m_generic makefile so that the correct list of header files is generated by the create_tflm_tree.py script.

bug=Arduino library creation external to the tflite-micro repository #256
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>
Co-authored-by: NAdvait Jain <advaitjain@google.com>

* Add files from TfLite

Added batch_matmul.h and tensor_utils_common.h that are needed for the BATCH_MATMUL operator.

* Arduino library creation for CI build.
Issue# 256

* fix bug with include file path flattening

* fix examples path generation

Some files in examples source and headers list are not in the examples directory.  They can be tensorflow files or third-party files.  The code is corrected so that these files end up inside the generated directory tree.  Previously, these files were being placed outside the generated directory tree and were thus invisible to follow-on targeted generation scripts.

* remove/revert files that go into the arduino-examples repo

* Format with:

```
tensorflow/lite/micro/tools/ci_build/test_code_style.sh --fix_formatting
```

* request changes to PR

* Removed symbolic link for micro_speech example from Makefile.
Added additional include flags to Makefile.
Adjusted header file transformations during base tree creation.

* Fix formatting.

* Move Arduino specific code to seperate repo

Remove ARDUINO defines.
Fix incorrect NDEBUG use.

Issue  #256
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>
Co-authored-by: NAdvait Jain <advaitjain@google.com>

* Sync from upstream TF.

* Fix build errors.

* more fixes.

* one more fix.
Co-authored-by: NAdvait Jain <advaitjain@google.com>

* Fix typo in test_code_style.sh

* Format python code.

* Reset code style.