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RationalCrossing: use ShiftQueues 

These are faster and small don't cost much more.
This commit is contained in:
Wesley W. Terpstra 2017-09-06 14:27:45 -07:00
parent 50d5d8c1fd
commit 2d93262f71
1 changed files with 6 additions and 6 deletions
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12
src/main/scala/util/RationalCrossing.scala
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@ -73,10 +73,10 @@ class RationalCrossingSource[T <: Data](gen: T, direction: RationalDirection = S
val deq = io.deq
val enq = direction match {
case Symmetric => Queue(io.enq, 1, flow=true)
case Flexible => Queue(io.enq, 2)
case Symmetric => ShiftQueue(io.enq, 1, flow=true)
case Flexible => ShiftQueue(io.enq, 2)
case FastToSlow => io.enq
case SlowToFast => Queue(io.enq, 2)
case SlowToFast => ShiftQueue(io.enq, 2)
}
val count = RegInit(UInt(0, width = 2))
@ -109,9 +109,9 @@ class RationalCrossingSink[T <: Data](gen: T, direction: RationalDirection = Sym
val enq = io.enq
val deq = Wire(io.deq)
direction match {
case Symmetric => io.deq <> Queue(deq, 1, pipe=true)
case Flexible => io.deq <> Queue(deq, 2)
case FastToSlow => io.deq <> Queue(deq, 2)
case Symmetric => io.deq <> ShiftQueue(deq, 1, pipe=true)
case Flexible => io.deq <> ShiftQueue(deq, 2)
case FastToSlow => io.deq <> ShiftQueue(deq, 2)
case SlowToFast => io.deq <> deq
}