[bug fix] fix fp16 dtype checking for cumsum op (#50973)

python/paddle/fluid/tests/unittests/test_cumsum_op.py

@@ -461,5 +461,21 @@ class TestTensorAxis(unittest.TestCase):
             np.testing.assert_allclose(static_out[0], infer_out)
 
 
+class TestCumSumOpFp16(unittest.TestCase):
+    def test_fp16(self):
+        x_np = np.random.random((100, 100)).astype('float16')
+        with paddle.static.program_guard(paddle.static.Program()):
+            x = paddle.static.data(shape=[100, 100], name='x', dtype='float16')
+            y1 = paddle.cumsum(x)
+            y2 = paddle.cumsum(x, axis=0)
+            y3 = paddle.cumsum(x, axis=-1)
+            y4 = paddle.cumsum(x, axis=-2)
+            if core.is_compiled_with_cuda():
+                place = paddle.CUDAPlace(0)
+                exe = paddle.static.Executor(place)
+                exe.run(paddle.static.default_startup_program())
+                out = exe.run(feed={'x': x_np}, fetch_list=[y1, y2, y3, y4])
+
+
 if __name__ == '__main__':
     unittest.main()

python/paddle/tensor/math.py

@@ -3208,6 +3208,12 @@ def cumsum(x, axis=None, dtype=None, name=None):
             axis = -1
         return _C_ops.cumsum(x, axis, flatten, False, False)
     else:
+        check_variable_and_dtype(
+            x,
+            'x',
+            ['float16', 'float32', 'float64', 'int32', 'int64'],
+            'cumsum',
+        )
         check_type(x, 'x', (Variable), 'cumsum')
         locals_var = locals().copy()
         kwargs = dict()