* remove eigen deps dof float16

* add cstdlib header

* replace stdlib header by cmath

* init commit

* move eigen of bfloat16

* add complex header

* add get_cublas_handle() api

* update format

* add unittests

* alter function name

[BUG FIX] Fix softmax cross entropy overflow problem.

* [2.0.1]Support New Custom OP on windows

* fix CI

* fix code style

* fix CI

* fix CI

* fix coverage

* fix CI

* fix CI

* Add conv transpose BF16

* Share function GetWeightsTz

* Adjust to review and fix op compatibility

* Add bias to unique handler name

* Remove errors related to paddle enforce

* Add conv2d_transpose to bf16 list and kernel refator

* update eigen version on Windows, test=develop

* add /bigobj for cl, test=develop

* Update Xbyak and add bf16 fast performance verification

* Fix formating

* Change LOG message

* Trigger an update of a new tag

* use iwyu clean include second time, test=develop

* support xpu inference with analysis predictor, test=develop

* merge the cmake of the xpu toolchain, test=develop

* add c-apis, test=develop

* fix a bug in extern_xpu, test=develop

* fix malloc L3 failed bug for kunlun

* minor

* [ROCM] update fluid platform for rocm35 (part1), test=develop

* address review comments, test=develop

* add abs test case

* use std::abs to fix abs bug

* fix the abs bug

* fix abs bug

* delete empty line of pybing.cc, test=develop

* use nvtx push pop in timeline, test=develop

* change year, test=develop

* add #ifdef PADDLE_WITH_CUDA, test=develop

* add #ifndef WIN32, test=develop

* is_pushed to is_pushed_, test=develop

* rewrite abs op

* rewrite abs op and remove abs in activation

* remove abs register in old codes

* fix abs_grad type error

* fix abs double_grad output name error

* modify abs_grad, abs_grad_grad functor for windows building

* format code style

* fix the bug of result is nan when the divisor is zero

* add missing abs attr and add abs for float16