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Macrocompiler should prioritize memories with no masks with DefaultCostMetric

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This commit is contained in:
Jerry Zhao
2021-02-22 01:30:47 -08:00
parent 689ebdc06e
commit ddea19825d
1 changed files with 5 additions and 1 deletions
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6
macros/src/main/scala/CostMetric.scala
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@@ -124,6 +124,10 @@ object DefaultMetric extends CostMetric with CostMetricCompanion {
else (mem.src.width/p)*m //Waste the extra maskbits
}
}
val maskPenalty = (memMask, libMask) match {
case (None, Some(m)) => 0.001
case (_, _) => 0
}
val depthCost = math.ceil(mem.src.depth.toDouble / lib.src.depth.toDouble)
val widthCost = math.ceil(memWidth.toDouble / lib.src.width.toDouble)
val bitsCost = (lib.src.depth * lib.src.width).toDouble
@@ -132,7 +136,7 @@ object DefaultMetric extends CostMetric with CostMetricCompanion {
val bitsWasted = depthCost*widthCost*bitsCost - requestedBits
val wastedConst = 0.05 // 0 means waste as few bits with no regard for instance count
val costPerInst = wastedConst*depthCost*widthCost
Some(1.0*bitsWasted/requestedBits+costPerInst)
Some(1.0*bitsWasted/requestedBits+costPerInst + maskPenalty)
}
override def commandLineParams = Map()