fix expand op lack of float16 (#32238)

python/paddle/fluid/layers/nn.py

@@ -10332,7 +10332,8 @@ def expand(x, expand_times, name=None):
     inputs = {"X": [x]}
     attrs = {}
     check_variable_and_dtype(
-        x, 'x', ['bool', 'float32', 'float64', 'int32', 'int64'], 'expand')
+        x, 'x', ['bool', 'float16', 'float32', 'float64', 'int32', 'int64'],
+        'expand')
     check_type(expand_times, 'expand_times', (list, tuple, Variable), 'expand')
     if convert_dtype(x.dtype) == 'bool' and x.stop_gradient == True:
         raise ValueError(

python/paddle/tensor/manipulation.py

@@ -1432,7 +1432,8 @@ def expand(x, shape, name=None):
                     'Elements in shape must be 1-D Tensors or integers.')
 
     check_variable_and_dtype(
-        x, 'x', ['bool', 'float32', 'float64', 'int32', 'int64'], 'expand')
+        x, 'x', ['bool', 'float16', 'float32', 'float64', 'int32', 'int64'],
+        'expand')
     check_type(shape, 'shape', (list, tuple, Variable), 'expand')
     if convert_dtype(x.dtype) == 'bool' and x.stop_gradient == False:
         raise ValueError("When the data type of input 'x' for expand is bool, "