* add abs composite backward op

* add missing changes during merge

* modify according to new rules

* local UT OK

* fix typo

* codestyle

* register composite operator

* add fp16 test for abs

* replace experimenta::tensor

* Fix bug of reduce_sum op. When input.numel() > INT32_MAX, its result
is wrong.

* Remove climits.

* Fix bug of hybrid parallel strategy with recompute using bf16.

* Fix bug of recompute_hybrid ctx.amp_dtype

* Fix bug of amp_dtype.

* Fix bug of auto_cast.

* * add comm context for device context

* add broadcast phi operator kernel and api

* add broadcast support dtype, update ut

* fix broadcast bfloat16 type

* fix ut

* update test_collective_broadcast_api timeout to 300

* [cinn] add elementwise_pow backward

* [cinn] update unnitest

* [cinn] update by comments

* [cinn] for ci

* [cinn] for ci

* [cinn] for ci

* [cinn] for ci

* [cinn] for ci

* remove with_data_parallel in collective_optimizer

* add comm op

* fix collective optimizer

* remove check_err_log=True

* mean fp16

* fp16

* [AMP OP&Test] mean append bf/fp16

* means append more bf16 uts

* format class name

* fix ci

* fix for windows

* fix issue

* fix redundancy

* fix redund

* fix elewise_max ut bf16 numeric delta

* remove use func

* move entry_attr

* remove evaluator

* fix evaluator

* modify optimizer tests

* lint

* tile_op

* fix bfloat16 x

* feat: add relu composite rule

* feat: add relu composite rule, maximum op

* feat: add relu composite rule, maximum op

* feat: add relu composite rule, polish comments

* feat: add relu composite rule, polish comments

* feat: add relu composite rule, add python api of relu

* feat: add relu composite rule, commit hook

* fix: maximum type error & ban cinn test

* fix: maximum input sequence bugs

* resolve conflicts

* fix: code style bugs

* add: relu fp16 test

* modify the 'import' position

* rollback

* move 'from paddle.fluid.io import save_inference_model' to head of api.py

* support transpose test on prim and cinn

* fix transpose logic and polish eager_op_test

* move io

* fix ci bugs

* fix ci bugs

* fix py3 bugs

* fix example code

* fix example code

* fix text

* fix text

* deal with ci bugs

* perfect code according comment

* delete import batch

* fix cumsum prim op maker type error

* add axis=None test for cumsum_grad prim

* fix t

* add stack composite rule

* add float16 datatype test

add comment.

only when -DWITH_XDNN_API=ON, will those files be packed into whl
package

* support elementwise_pow bfloat16

* add only_check_prim parameters in check_grad

* modify unit test

* fix floor test

* fix sigmoid bfloat16 test

* add float16 to log log1p logsumexp

* update log

* update test_activation_op.py

* update

* update codestyle

* Update  test_activation_op codestyle

* update

* update

* up

* update codestyle

* emmm

* -

---------
Co-authored-by: Nwqgo <1552367872@qq.com>

* first commit.

* change host logic

* fix code bugs

* fix code error

---------
Co-authored-by: Nzhangbopd <1299246947@qq.com>

* first approach

* test finished

* cpp test deleted

* CmakeList corrected

* multi_gru_seq_fuse_pass rewritten

* dummy cout deleted

* review changes

* timeout extended

Fix the quotation mark format problem in PixelShuffle document

* add float16 to less_equal

* update

* update

* update codestyle

* update file name

---------
Co-authored-by: Nwqgo <1552367872@qq.com>