The exist code of a posix compilant shell is 0..255.  Attempting to
return -1 will error in some shells and implicitly cast to 255 in
others.  Fix it by returning a legal return value.

* Improve non_max_suppression for CPU

* Improve get_valid_counts

* Minor change

* Skip some unnecessary computes

* update README

* update README

* update README

* update README

* fix typo

[CI] Ensure rat ignores rust cargo lock files [CI] Ensure rat ignores emacs backup files [CI] Ensure rat ignores .egg-info (#3314)

The existing RAT ASF license auditing logic ignores any failure in the
shell pipeline rather than just the exit code of the final grep.
Adjust the logic such that failure of the various tools in the
pipeline are not elided away.

* add documentation and check for extension

* add env variable for verilator include

* fix typo

* this will test if path exist otherwise it won't buid

* check if verilator path and binary is set properly

* add ?

* remove export

* no longer needed

* Fix x86 depthwise conv2d alter_op_layout

* Small fix

* Add test case

* Fix test

* Assert kernel layout

* Minor fix

* Add get_shape function

* Minor change

* make off lowercase

* update README

* Improve roi_align performance for x86

* Change test

* improve nms

* add back get_valid_count syncs

* init impl for topk

* Fix cpu for topk

* init cuda impl for topk

* Add cuda for topk

* fix

* Add doc

* update doc

* lint

* lint

* lint

* x

* fix warning

* [Relay] Add TopK in tf converter

* Add frontend converter

* fix

* [Relay][Docs] Add parser dependency install instructions.

See https://discuss.tvm.ai/t/trouble-enabling-antlr/2783.

* Add a word.

* Update since the parser will now be committed to the repo.

* revert b/c adding the parser doesn't fix this

* [Bugfix] [VTA] VTA DRAM Have A Logic Issue May Cause GEMM Output Wrong.

Symptom:
after change “LOG_BLOCK_IN” and “LOG_BLOCK_OUT” from vta_config.json
into 7, run vta "Simple Matrix Multiply" in "simulator", the vta
calculate result for GEMM is wrong.

Sometime VTA crash with error “Check failed: phy_addr != 0 (0 vs. 0) :
trying to get address that is nullptr”

Analysis:
Simulator hardcode kPageSize into 1<<12 and physical address calculate
based on this size, when doing “insn->dram_base” calculation , because
GetElemBytes(dst_memory_type) larger than page size, different physcial
address may get same dram_base, than caused logic issue and finally
trigger GEMM out put is wrong.

Solution:
add logic to check if PAGE SIZE larger then "GetElemBytes" return value.

* address review comments.