Add extra check for safety.

theano/scalar/basic.py

@@ -1662,7 +1662,8 @@ class Pow(BinaryScalarOp):
         if (node.inputs[0].type == node.outputs[0].type and
             node.inputs[1].type == node.outputs[0].type and
             # amdlibm 3.0 do not have a float64 version of this SIMD function
-            node.inputs[0].dtype == 'float32'):
+            node.inputs[0].dtype == 'float32' and
+            node.inputs[1].dtype == 'float32'):
             dtype = 'float'
             fct = "amd_vrsa_powf"
             return """
@@ -1677,7 +1678,8 @@ class Pow(BinaryScalarOp):
               node.inputs[1].dtype == node.outputs[0].dtype and
               all(node.inputs[1].broadcastable) and
               # amdlibm 3.0 do not have a float64 version of this SIMD function
-            node.inputs[0].dtype == 'float32'):
+              node.inputs[0].dtype == 'float32' and
+              node.inputs[1].dtype == 'float32'):
             dtype = 'float'
             fct = "amd_vrsa_powxf"
             return """