From: @TFbunny
Reviewed-by: 
Signed-off-by:

From: @TFbunny
Reviewed-by: 
Signed-off-by:

From: @zhupuxu
Reviewed-by: @kingxian,@liangchenghui
Signed-off-by: @kingxian

1. add validation for directory and filename
2. refactor the file operations about path
3. add in CMakeLists
4. add logger in nn_ops

From: @hwhewei
Reviewed-by: @zhunaipan,@zh_qh
Signed-off-by: @zh_qh

Signed-off-by: zhupuxu <zhupuxu@huawei.com>

From: @liu_xiao_93
Reviewed-by: 
Signed-off-by:

The basic idea is: exploits data dependency to control the execution order
of side-effect operations, and keep the semantics of ANF unchanged.

The ControlDepend primitive is removed and there are two primitives added:

1. UpdateState:
```
  a = Assign(para, value)
```
became:
```
  a = Assign(para, value, u)
  u = UpdateState(u, a)
```

2. Load:
```
  x = Add(para, value)
```
became:
```
  p = Load(para, u)
  x = Add(p, value)
  u = UpdateState(u, p)
```

From: @wangshuide2020
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @jinyaohui
Reviewed-by: 
Signed-off-by:

From: @wangnan39
Reviewed-by: 
Signed-off-by:

From: @liangzhibo
Reviewed-by: @ginfung
Signed-off-by:

From: @wangshuide2020
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui

From: @zhupuxu
Reviewed-by: @kingxian,@zhoufeng54
Signed-off-by: @kingxian

From: @yuchaojie
Reviewed-by: @kisnwang,@zhoufeng54
Signed-off-by: @zhoufeng54

Signed-off-by: zhupuxu <zhupuxu@huawei.com>

From: @zhangzhewei01
Reviewed-by: 
Signed-off-by:

From: @yuchaojie
Reviewed-by: @kingxian,@c_34
Signed-off-by: @kingxian

From: @he-botao
Reviewed-by: 
Signed-off-by:

增加测试用例

修改测试用例

修改测试用例

修改算子实现，alpha 写死为 1.0

修改算子实现，alpha 写死为 1
修改算子注册

修改算子实现，dy 和 y 搞反了

修改测试代码

修改算子实现

修改算子实现，float16 单独走一个分支

修改算子实现，前端的 float 转换为double

修改算子实现，改回来了

修改算子实现，float16 转换为 Eigen 库中的 half

修改算子实现，float16 转换为 Eigen 库中的 half

修改算子实现，float16 转换为 Eigen 库中的 half

修改算子实现 在单独的文件中实现 EluGrad

修改算子实现 在单独的文件中实现 EluGrad

修改算子实现 在单独的文件中实现 EluGrad

修改算子实现 在单独的文件中实现 EluGrad

格式化代码

修改 pylint 错误

更新注释信息

删除未使用的私有变量

删除未使用的私有变量

From: @jiangzg001
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui

From: @jiangzg001
Reviewed-by: @liangchenghui,@linqingke
Signed-off-by: @liangchenghui

From: @wangshuide2020
Reviewed-by: @liangchenghui,@ljl0711
Signed-off-by: @liangchenghui

From: @peilin-wang
Reviewed-by: @tom__chen,@robingrosman
Signed-off-by: @robingrosman

From: @TFbunny
Reviewed-by: @tom__chen
Signed-off-by:

From: @yuchaojie
Reviewed-by: 
Signed-off-by:

From: @yuan_shen_zhou
Reviewed-by: @liangchenghui,@linqingke
Signed-off-by: @liangchenghui

From: @yanzhenxiang2020
Reviewed-by: 
Signed-off-by: