chore: import upstream snapshot with attribution

python/tvm/target/intrin.py

@@ -0,0 +1,82 @@
+# 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.
+"""Target dependent intrinsic registration."""
+
+from tvm.ir import register_intrin_lowering
+from tvm.tirx import call_pure_extern
+
+
+def _rule_float_suffix(op):
+    """Intrinsic rule: Add float suffix if it is float32.
+
+    This is an example intrinsic generation rule.
+
+    Parameters
+    ----------
+    op : Expr
+        The call expression of original intrinsic.
+
+    Returns
+    -------
+    ret : Expr
+        The translated intrinsic rule.
+        Return same op if no translation is possible.
+
+    See Also
+    --------
+    register_intrin_lowering : The registration function for intrinsic lowering rule.
+    """
+    name = op.op.name
+    assert name.startswith("tirx.")
+    prefix = name[4:]
+
+    if op.ty.dtype == "float32":
+        return call_pure_extern(op.ty, f"{prefix}f", *op.args)
+    if op.ty.dtype == "float64":
+        return call_pure_extern(op.ty, prefix, *op.args)
+    return op
+
+
+def _rule_float_direct(op):
+    """Intrinsic rule: Directly call pure extern function for floats.
+
+    This is an example intrinsic generation rule.
+
+    Parameters
+    ----------
+    op : Expr
+        The call expression of original intrinsic.
+
+    Returns
+    -------
+    ret : Expr
+        The translated intrinsic rule.
+        Return same op if no translation is possible.
+
+    See Also
+    --------
+    register_intrin_lowering : The registration function for intrinsic lowering rule.
+    """
+    if str(op.ty.dtype).startswith("float"):
+        return call_pure_extern(op.ty, op.op.name[4:], *op.args)
+    return None
+
+
+# opencl pattern for exp
+register_intrin_lowering("tirx.exp", target="opencl", f=_rule_float_direct, level=99)
+# default pattern for exp
+register_intrin_lowering("tirx.exp", target="default", f=_rule_float_suffix, level=99)