[PTen]Refactor elementwise_sub grad / double grad Kernel and move them to pten #39225
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xingfeng01 approved these changes Jan 27, 2022
ZzSean reviewed Jan 27, 2022
| namespace paddle { | ||
| namespace operators { | ||
| | ||
| template <typename DeviceContext, typename T> |
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之前的代码当中，div引用了sub_op头文件中的这个函数，但是迁移后，这个函数在sub_op头文件中已经移除，且为了适应pten下的写法，pten下这个函数稍微修改的有点不一样了，于是干脆为了避免对div的修改，将sub的这个函数写入到了div当中。不过这个是临时写法，后续迁移div会删掉。
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将elementwise_sub 反向一阶导，二阶导Kernel迁移到Pten下