riscv/rocket-chip
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diplomacy: disambiguate names only when necessary

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If two (or more) 'auto_' things have the same name, append _0 and _1 to them.

The order of definitions is unaffected; ie:
  a => a_0
  b => b_0
  b => b_1
  c => c
  a => a_1
This commit is contained in:
Wesley W. Terpstra 2017-09-25 16:12:34 -07:00
parent 5323cf88dd
commit fef5054cec
1 changed files with 15 additions and 4 deletions
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19
src/main/scala/diplomacy/LazyModule.scala
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@ -7,6 +7,7 @@ import chisel3.experimental.{BaseModule, RawModule, MultiIOModule, withClockAndR
import chisel3.internal.sourceinfo.{SourceInfo, SourceLine, UnlocatableSourceInfo}
import freechips.rocketchip.config.Parameters
import scala.collection.immutable.ListMap
import scala.util.matching._
abstract class LazyModule()(implicit val p: Parameters)
{
@ -183,10 +184,20 @@ case class HalfEdge(serial: Int, index: Int)
case class Dangle(source: HalfEdge, sink: HalfEdge, flipped: Boolean, name: String, data: Data)
final class AutoBundle(elts: (String, Data, Boolean)*) extends Record {
// !!! need to fix-up name collision better than appending _#
val elements = ListMap(elts.zipWithIndex map { case ((field, elt, flip), i) =>
(field + "_" + i) -> (if (flip) elt.cloneType.flip else elt.cloneType)
}:_*)
// We need to preserve the order of elts, despite grouping by name to disambiguate things
val elements = ListMap() ++ elts.zipWithIndex.map(makeElements).groupBy(_._1).values.flatMap {
case Seq((key, element, i)) => Seq(i -> (key -> element))
case seq => seq.zipWithIndex.map { case ((key, element, i), j) => i -> (key + "_" + j -> element) }
}.toList.sortBy(_._1).map(_._2)
require (elements.size == elts.size)
private def makeElements(tuple: ((String, Data, Boolean), Int)) = {
val ((key, data, flip), i) = tuple
// trim trailing _0_1_2 stuff so that when we append _# we don't create collisions
val regex = new Regex("(_[0-9]+)*$")
val element = if (flip) data.cloneType.flip else data.cloneType
(regex.replaceAllIn(key, ""), element, i)
}
override def cloneType = (new AutoBundle(elts:_*)).asInstanceOf[this.type]
}