gussmith23 commented on a change in pull request #5812:
URL: https://github.com/apache/incubator-tvm/pull/5812#discussion_r473444408
##########
File path: python/tvm/target/datatype.py
##########
@@ -135,8 +155,40 @@ def lower(op):
dtype = "uint" + str(t.bits)
if t.lanes > 1:
dtype += "x" + str(t.lanes)
- if isinstance(op, (_Cast, _FloatImm)):
- return tvm.tir.call_pure_extern(dtype, extern_func_name, op.value)
- return tvm.tir.call_pure_extern(dtype, extern_func_name, op.a, op.b)
+ if isinstance(op, _Cast):
+ src_bits = bit_length(op.value.dtype)
+ return call_pure_extern(dtype, extern_func_map[(src_bits,
t.bits)], op.value)
+ if isinstance(op, _FloatImm):
+ return call_pure_extern(dtype, extern_func_map[t.bits], op.value)
+ if isinstance(op, _Call):
+ return call_pure_extern(dtype, extern_func_map[t.bits], *op.args)
+ if isinstance(op, _BinaryOpExpr):
+ return call_pure_extern(dtype, extern_func_map[t.bits], op.a, op.b)
+
+ raise RuntimeError(f"lowering unsupported op: {op.astext()}")
return lower
+
+def bit_length(type_str):
+ t = DataType(type_str)
+ return t.bits
+
+def lower_ite(ite_intrin):
+ dtype = ite_intrin.dtype
+ t = tvm.DataType(dtype)
+ assert get_type_registered(t.type_code)
+ dtype = "uint" + str(t.bits)
+ if t.lanes > 1:
+ dtype += "x" + str(t.lanes)
+ return call_intrin(dtype, "tir.if_then_else", convert(ite_intrin.args[0]),
+ convert(ite_intrin.args[1]),
+ convert(ite_intrin.args[2]))
+
+def lower_call_pure_extern(op):
Review comment:
- [x] @gussmith23 Document
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