Make the op Rebroadcaste work for the gpu. Miss the opt that wil move the…

theano/sandbox/cuda/type.py

@@ -43,7 +43,9 @@ class CudaNdarrayType(Type):
     A cyclic dependency is avoided by not hardcoding this class. 
     """
 
-    def __init__(self, broadcastable, name=None):
+    def __init__(self, broadcastable, name=None, dtype=None):
+        if dtype != None or dtype != 'float32':
+            raise TypeError(self.__class__.__name__+' only support dtype float32 for now.')
         self.broadcastable = tuple(broadcastable)
         self.name = name
         self.dtype_specs() # error checking is done there

theano/tensor/basic.py

@@ -2568,12 +2568,14 @@ class Rebroadcast(Op):
           would make x broadcastable in axis 0
           and not broadcastable in axis 1
     See also the unbroadcast function.
+
+    ..note: work inplace and work for CudaNdarrayType
     """
     view_map = {0: [0]}
     def __init__(self, *axis):
         self.axis = dict(axis)
     def make_node(self, x):
-        t = TensorType(dtype = x.type.dtype,
+        t = x.type.__class__(dtype = x.type.dtype,
                        broadcastable = [self.axis.get(i, b)
                                         for i, b in enumerate(x.type.broadcastable)])
         return Apply(self, [x], [t()])