Merge pull request !249 from wuxuejian/adapt_embeddinglookup

Merge pull request !248 from peixu_ren/custom_aicpu

Merge pull request !247 from zhaozhenlong/fix-issue-ssim-limit-input-dtype-incu

Merge pull request !244 from wuxuejian/recover_embeddinglookup

Merge pull request !242 from yanghaoran/code_sync_0623

Merge pull request !241 from changzherui/mod_ver_num

Merge pull request !230 from yanzhenxiang2020/aicpu_param_incubator

Merge pull request !225 from xutianchun/mirror_pad

Merge pull request !2468 from Giancarlo/optimizer_update

Merge pull request !2432 from liangzelang/dev1

Merge pull request !2457 from VectorSL/gpu-type-expand

Merge pull request !237 from zhaozhenlong/fix-issue-ssim-ksize-check-incu

Merge pull request !2180 from chenweifeng/gelu-fp16

Merge pull request !2482 from lilei/sparse_proximal_ada_grad

Merge pull request !236 from wuxuejian/incu_embedding

Merge pull request !2479 from dinghao/master

Merge pull request !2436 from jiangjinsheng/issue_fix4

Merge pull request !2434 from jjfeing/master

Merge pull request !2297 from jiangjinsheng/vm_matrixdiag

Merge pull request !2459 from wukesong/mkdify_alexnet

Merge pull request !2305 from 李鸿章/callback

Merge pull request !2466 from mindspore_ding/backend

Merge pull request !2465 from chentingting/gcn_rectification

Merge pull request !2451 from 王东旭/master

Merge pull request !2474 from Chong/zc

Merge pull request !2418 from caojian05/ms_master_dev

Merge pull request !2460 from kisnwang/optimize-cpu-reduce-gradient

move embeddinglookup to the internal

Merge pull request !2376 from Chong/zc

Merge pull request !2403 from JoyLvliang/session-code-review

Merge pull request !2446 from zhoufeng/xiu-ba-ge