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[Relax][ONNX] Add Celu operator support - #20923
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This commit adds support for the ONNX Celu (Continuously Differentiable
Exponential Linear Unit) operator in the Relax ONNX frontend.
Celu is computed element-wise as:
celu(x) = max(0, x) + min(0, alpha * (exp(x / alpha) - 1))
= -alpha * relu(1 - exp(x / alpha)) + relu(x)
Changes include:
- Added `Celu` converter class in `python/tvm/relax/frontend/onnx/onnx_frontend.py`
with `_impl_v12` supporting the `alpha` attribute (defaulting to 1.0).
- Registered "Celu" in the operator converter map.
- Added structural IR equivalence tests (`test_celu_ir`) and numerical
correctness tests against ONNX Runtime (`test_celu`) in
`tests/python/relax/test_frontend_onnx.py`.
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This commit adds support for the ONNX Celu (Continuously Differentiable Exponential Linear Unit) operator in the Relax ONNX frontend.
Celu is computed element-wise as:
celu(x) = max(0, x) + min(0, alpha * (exp(x / alpha) - 1))
= -alpha * relu(1 - exp(x / alpha)) + relu(x)
Changes include:
Celuconverter class inpython/tvm/relax/frontend/onnx/onnx_frontend.pywith_impl_v12supporting thealphaattribute (defaulting to 1.0).test_celu_ir) and numerical correctness tests against ONNX Runtime (test_celu) intests/python/relax/test_frontend_onnx.py.