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Global per-clock step limit #11

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Global per-clock step limit #11

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15 changes: 15 additions & 0 deletions src/main/scala/chisel3/tester/package.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,8 @@

package chisel3

import scala.collection.mutable

import chisel3.core.ActualDirection // TODO needs to be a public API
import chisel3.experimental.{DataMirror, FixedPoint}
import chisel3.internal.firrtl.FPLit
Expand Down Expand Up @@ -91,8 +93,21 @@ package object tester {
// def staleExpect(value: T): Unit = expectWithStale(value, true) // TODO: can this be replaced w/ phases?
}

val clockLimits = new mutable.WeakHashMap[Clock, (Option[Int], Int)]() // Clock -> (MaxCycles, Steps)
implicit class testableClock(x: Clock) {
private def clockLimit = clockLimits.getOrElse(x, (None, 0))

def setMaxSteps(maxSteps: Int) = clockLimits.update(x, clockLimit.copy(_1=Some(maxSteps)))

def step(cycles: Int = 1): Unit = {
clockLimits.update(x, clockLimit match { case (maxSteps, numSteps) =>
val nextNumSteps = numSteps + cycles
maxSteps.foreach { mc =>
if (nextNumSteps >= mc)
Context().env.testerFail(s"Exceeded `maxSteps=$mc` for clock `${x.instanceName}`.")
}
(maxSteps, nextNumSteps)
})
Context().backend.step(x, cycles)
}
}
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