feat: support Dynamo converter for torch.ops.aten.erf.default op

Dynamo converter support for torch.ops.aten.erf.default op

Author: bowang007

py/torch_tensorrt/dynamo/conversion/aten_ops_converters.py

@@ -329,6 +329,23 @@ def aten_ops_squeeze(
     return impl.squeeze.squeeze(network, target, SourceIR.ATEN, name, args[0], args[1])
 
 
+@dynamo_tensorrt_converter(torch.ops.aten.erf.default)  # type: ignore[misc]
+def aten_ops_erf(
+    network: TRTNetwork,
+    target: Target,
+    args: Tuple[Argument, ...],
+    kwargs: Dict[str, Argument],
+    name: str,
+) -> Union[TRTTensor, Sequence[TRTTensor]]:
+    return impl.unary.erf(
+        network,
+        target,
+        SourceIR.ATEN,
+        name,
+        args[0],
+    )
+
+
 @dynamo_tensorrt_converter(torch.ops.aten.unsqueeze.default)  # type: ignore[misc]
 def aten_ops_unsqueeze(
     network: TRTNetwork,
@@ -357,14 +374,14 @@ def aten_ops_softmax(
 
 @dynamo_tensorrt_converter(
     torch.ops.aten.split.Tensor, capability_validator=dynamic_unsupported_with_args([1])
-)
+)  # type: ignore[misc]
 @dynamo_tensorrt_converter(
     torch.ops.aten.split.sizes, capability_validator=dynamic_unsupported_with_args([1])
-)
+)  # type: ignore[misc]
 @dynamo_tensorrt_converter(
     torch.ops.aten.split_with_sizes.default,
     capability_validator=dynamic_unsupported_with_args([1]),
-)
+)  # type: ignore[misc]
 def aten_ops_split(
     network: TRTNetwork,
     target: Target,

py/torch_tensorrt/dynamo/conversion/impl/unary/ops.py

@@ -401,3 +401,20 @@ def neg(
     return convert_unary(
         network, target, source_ir, name, trt.UnaryOperation.NEG, input_val
     )
+
+
+def erf(
+    network: TRTNetwork,
+    target: Target,
+    source_ir: Optional[SourceIR],
+    name: str,
+    input_val: TRTTensor,
+) -> TRTTensor:
+    if (isinstance(input_val, TRTTensor)) and (
+        input_val.dtype == trt.int8 or input_val.dtype == trt.int32
+    ):
+        input_val = cast_trt_tensor(network, input_val, trt.float32, name)
+
+    return convert_unary(
+        network, target, source_ir, name, trt.UnaryOperation.ERF, input_val
+    )

tests/py/dynamo/conversion/test_erf_aten.py

@@ -0,0 +1,52 @@
+import torch
+import torch.nn as nn
+from parameterized import parameterized
+from torch.testing._internal.common_utils import run_tests
+from torch_tensorrt import Input
+
+from .harness import DispatchTestCase
+
+
+class TestErfConverter(DispatchTestCase):
+    @parameterized.expand(
+        [
+            ("2d_dim_dtype_float", (2, 2), torch.float),
+            ("3d_dim_dtype_float", (2, 2, 2), torch.float),
+            ("2d_dim_dtype_half", (2, 2), torch.half),
+            ("3d_dim_dtype_half", (2, 2, 2), torch.half),
+        ]
+    )
+    def test_erf_float(self, _, x, type):
+        class erf(nn.Module):
+            def forward(self, input):
+                return torch.erf(input)
+
+        inputs = [torch.randn(x, dtype=type)]
+        self.run_test(
+            erf(),
+            inputs,
+            precision=type,
+            expected_ops={torch.ops.aten.erf.default},
+        )
+
+    @parameterized.expand(
+        [
+            ("2d_dim_dtype_int32", (2, 2), torch.int32, 0, 5),
+            ("3d_dim_dtype_int32", (2, 2, 2), torch.int32, 0, 5),
+        ]
+    )
+    def test_erf_int(self, _, x, type, min, max):
+        class erf(nn.Module):
+            def forward(self, input):
+                return torch.erf(input)
+
+        inputs = [torch.randint(min, max, x, dtype=type)]
+        self.run_test(
+            erf(),
+            inputs,
+            expected_ops={torch.ops.aten.erf.default},
+        )
+
+
+if __name__ == "__main__":
+    run_tests()