[FIRRTL] Add IsTagOp to test enumeration variant
#5038
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This adds an `IsTagOp` which tests the active variant of an enumeration for a specific tag and returns 1 if they match, 0 otherwise. This op will be used to lower match statements in to a mux-like format. This op should only be used internally in the compiler, and there are no plans to expose this operation in the FIRRTL frontend language.
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This adds an
IsTagOpwhich tests the active variant of an enumeration for a specific tag and returns 1 if they match, 0 otherwise. This op will be used to lower match statements in to a mux-like format. This op should only be used internally in the compiler, and there are no plans to expose this operation in the FIRRTL frontend language.