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Fix used bit logic when invalidating but not dequeueing

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This commit is contained in:
Hansung Kim
2023-04-28 14:58:47 -07:00
parent 2622bf04d3
commit 44d3c09b6d
2 changed files with 21 additions and 5 deletions
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21
src/test/scala/coalescing/CoalescingUnitTest.scala
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@@ -375,9 +375,10 @@ class CoalShiftQueueTest extends AnyFlatSpec with ChiselScalatestTester {
}
}
it should "dequeue invalidated entries by itself" in {
it should "dequeue invalidated head on its own when allowShift" in {
test(new CoalShiftQueue(gen = UInt(8.W), entries = 4)) { c =>
c.io.invalidate.valid.poke(false.B)
c.io.allowShift.poke(true.B)
// prepare
@@ -399,19 +400,33 @@ class CoalShiftQueueTest extends AnyFlatSpec with ChiselScalatestTester {
// invalidate two entries at head
c.io.invalidate.valid.poke(true.B)
c.io.invalidate.bits.poke(0x3.U)
c.io.queue.deq.ready.poke(false.B)
// [ 0x56 | 0x34(inv) | 0x12(inv) ]
c.clock.step()
// [ 0x56 | 0x34(inv) ]
// [ 0x56 | 0x34(inv) ]
c.io.invalidate.valid.poke(false.B)
c.io.queue.deq.ready.poke(false.B)
c.clock.step()
// [ 0x56 ]
// [ 0x56 ]
c.io.queue.deq.ready.poke(true.B)
c.io.queue.deq.valid.expect(true.B)
c.io.queue.deq.bits.expect(0x56.U)
c.clock.step()
c.io.queue.deq.ready.poke(true.B)
c.io.queue.deq.valid.expect(false.B)
c.clock.step()
// do one more enqueue-then-dequeue to see if used bit was properly cleared
c.io.queue.deq.ready.poke(false.B)
c.io.queue.enq.ready.expect(true.B)
c.io.queue.enq.valid.poke(true.B)
c.io.queue.enq.bits.poke(0x78.U)
c.clock.step()
// should dequeue right away
c.io.queue.enq.valid.poke(false.B)
c.io.queue.deq.ready.poke(true.B)
c.io.queue.deq.valid.expect(true.B)
c.io.queue.deq.bits.expect(0x78.U)
}
}