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SetAssocLRU: initialize state #2753

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Dec 4, 2020
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SetAssocLRU: initialize state #2753

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4 changes: 3 additions & 1 deletion src/main/scala/util/Replacement.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -300,7 +300,9 @@ class SetAssocLRU(n_sets: Int, n_ways: Int, policy: String) extends SetAssocRepl
case "lru" => new TrueLRU(n_ways)
case t => throw new IllegalArgumentException(s"unknown Replacement Policy type $t")
}
val state_vec = Reg(Vec(n_sets, UInt(logic.nBits.W)))
val state_vec =
if (logic.nBits == 0) Reg(Vec(n_sets, UInt(logic.nBits.W))) // Work around elaboration error on following line
else RegInit(VecInit(Seq.fill(n_sets)(0.U(logic.nBits.W))))

def access(set: UInt, touch_way: UInt) = {
state_vec(set) := logic.get_next_state(state_vec(set), touch_way)
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