Add doc

Author: chengduoZH

doc/fluid/api/layers.rst

@@ -361,6 +361,12 @@ conv2d
 ..  autofunction:: paddle.fluid.layers.conv2d
     :noindex:
 
+conv3d
+------
+
+..  autofunction:: paddle.fluid.layers.conv3d
+    :noindex:
+
 sequence_pool
 -------------
 
@@ -385,6 +391,12 @@ pool2d
 ..  autofunction:: paddle.fluid.layers.pool2d
     :noindex:
 
+pool3d
+------
+
+..  autofunction:: paddle.fluid.layers.pool3d
+    :noindex:
+
 batch_norm
 ----------
 
@@ -403,6 +415,13 @@ conv2d_transpose
 ..  autofunction:: paddle.fluid.layers.conv2d_transpose
     :noindex:
 
+conv3d_transpose
+----------------
+
+..  autofunction:: paddle.fluid.layers.conv2d_transpose
+    :noindex:
+
+
 sequence_expand
 ---------------
 

python/paddle/fluid/layers/nn.py

@@ -1722,7 +1722,7 @@ def pool2d(input,
     if not isinstance(use_cudnn, bool):
         raise ValueError("use_cudnn should be True or False")
 
-    l_type = 'conv2d'
+    l_type = 'pool2d'
 
     helper = LayerHelper(l_type, **locals())
     dtype = helper.input_dtype()