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TF frontend: add softsign op #6799

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Nov 2, 2020
Merged

TF frontend: add softsign op #6799

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11 changes: 11 additions & 0 deletions python/tvm/relay/frontend/tensorflow.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1923,6 +1923,16 @@ def _impl(inputs, attr, params, mod):
return _impl


def _softsign():
# op description: https://www.tensorflow.org/api_docs/python/tf/math/softsign
def _impl(inputs, attr, params, mod):
abs_out = get_relay_op("abs")(inputs[0])
add_out = abs_out + tvm.relay.const(1, attr["T"].name)
return inputs[0] / add_out

return _impl


def _softplus():
# op description: https://www.tensorflow.org/api_docs/python/tf/math/softplus
def _impl(inputs, attr, params, mod):
Expand Down Expand Up @@ -2381,6 +2391,7 @@ def _impl(inputs, attr, params, mod):
"Slice": _slice(),
"Softmax": _softmax(),
"Softplus": _softplus(),
"Softsign": _softsign(),
"SpaceToBatchND": _space_to_batch_nd(),
"SpaceToDepth": _space_to_depth(),
"Split": _split(False),
Expand Down
16 changes: 16 additions & 0 deletions tests/python/frontend/tensorflow/test_forward.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3504,6 +3504,22 @@ def _test_forward_expm1(shape):
_test_forward_expm1([2, 5, 2, 5])


def test_forward_softsign():
"""test operator softsign """

def _test_forward_softsign(shape):
tf.disable_eager_execution()
np_data = np.random.uniform(1, 100, size=shape).astype(np.float32)
tf.reset_default_graph()
in_data = tf.placeholder(tf.float32, shape, name="in_data")
tf.nn.softsign(in_data, name="softsign")
compare_tf_with_tvm([np_data], ["in_data:0"], "softsign:0")

_test_forward_softsign([1, 100])
_test_forward_softsign([1, 10, 10])
_test_forward_softsign([2, 5, 2, 5])


def test_forward_negative():
"""test tf operator Neg """
np_data = np.random.uniform(-100, 255, size=(224, 224, 3)).astype(np.float32)
Expand Down