[GitHub] [incubator-tvm] hypercubestart commented on a change in pull request #5812: Bring Your Own Datatypes

[GitBox <gi...@apache.org>]

hypercubestart commented on a change in pull request #5812:
URL: https://github.com/apache/incubator-tvm/pull/5812#discussion_r482623801



##########
File path: python/tvm/relay/frontend/change_datatype.py
##########
@@ -0,0 +1,105 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# pylint: disable=unused-argument
+"""Change Datatype Pass"""
+from ..function import Function
+from ..expr_functor import ExprMutator
+from ..transform.transform import function_pass
+from ..expr import var, bind
+
+@function_pass(opt_level=0)
+class ChangeDatatype(ExprMutator):
+    """Mutator for changing the datatype of Relay programs.
+
+    This pass should be useful for users of the Bring Your Own Datatypes
+    framework.
+    TODO(@gussmith23 @hypercubestart) Add link to documentation when it exists
+
+    Example:
+
+    .. code-block:: python
+
+        from tvm.relay.testing.inception_v3 import get_workload
+        mod, params = get_workload()
+
+        def change_dtype(mod, params, src, dst):
+            mod = ChangeDatatype(src, dst)(mod)
+            params = dict((p, tvm.nd.array(params[p].asnumpy().astype(dst))) for p in params)
+            return mod, params
+
+        mod, params = change_dtype(mod, params, "float32", "posites2")

Review comment:
       change to custom[posites2]32




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