Merge pull request !2180 from chenweifeng/gelu-fp16

Merge pull request !2338 from chenweifeng/nezha

Merge pull request !2282 from chenzhongming/master

Merge pull request !2281 from zyli2020/add_sigmoid

Merge pull request !2292 from limingqi107/master

Merge pull request !2194 from 王东旭/master

Merge pull request !2150 from chenweifeng/tanh-fp16

Merge pull request !2229 from zyli2020/add_ftrl_op

Merge pull request !2226 from zyli2020/add_adam_op

Merge pull request !2235 from zyli2020/add_sigmoid_cross_entropy_with_logits_grad

Merge pull request !2234 from zyli2020/add_sigmoid_cross_entropy_with_logits

Merge pull request !2210 from limingqi107/max_device_memory_optimize

Merge pull request !2093 from VectorSL/argmaxwithvalue

Merge pull request !2021 from VectorSL/gpu-add-akg-kernel

Merge pull request !1513 from zyli2020/refine_data_copy_in_multi_graph

Merge pull request !1057 from chenweifeng/matmul

Merge pull request !370 from chenweifeng/unsorted_segment_sum

Merge pull request !994 from chenweifeng/broadcast_unequal_dims

Merge pull request !1021 from chenweifeng/broadcast_grad

Merge pull request !948 from chenweifeng/logsoftmax