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[HW] Add write-under-write enum attr 

Add a new enumerated attribute that defines the write-under-write
behavior of HW memories.  Two flavors are added: (1) undefined behavior
and (2) port-ordered behavior.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@sifive.com>
This commit is contained in:
Schuyler Eldridge 2021-09-17 02:02:28 -04:00
parent e4731d4b5b
commit 7271abaf46
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5
include/circt/Dialect/HW/HWAttributes.td
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@ -84,3 +84,8 @@ def VerbatimParameterValueAttr : AttrDef<HWDialect, "VerbatimParameterValue"> {
AttributeSelfTypeParameter<"">:$type);
let mnemonic = "verbatim.parameter.value";
}
def WUW_Undefined : I32EnumAttrCase<"Undefined", 0>;
def WUW_PortOrder : I32EnumAttrCase<"PortOrder", 1>;
def WUWAttr : I32EnumAttr<"WUW", "Write Under Write Behavior",
[WUW_Undefined, WUW_PortOrder]>;