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consider mask grans for cost

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Donggyu Kim
2017-07-31 01:54:19 -07:00
committed by edwardcwang
parent ba33306e30
commit 937b053b15
1 changed files with 7 additions and 1 deletions
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8
macros/src/main/scala/MacroCompiler.scala
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@@ -335,8 +335,14 @@ class MacroCompilerPass(mems: Option[Seq[Macro]],
// val cost = 100 * (mem.depth * mem.width) / (lib.depth * lib.width) +
// (mem.depth * mem.width)
// Donggyu: I re-define cost
val memMask = mem.src.ports map (_.maskGran) find (_.isDefined) map (_.get)
val libMask = lib.src.ports map (_.maskGran) find (_.isDefined) map (_.get)
val memWidth = (memMask, libMask) match {
case (Some(1), Some(1)) | (None, _) => mem.src.width
case (Some(p), _) => p // assume that the memory consists of smaller chunks
}
val cost = (((mem.src.depth - 1) / lib.src.depth) + 1) *
(((mem.src.width - 1) / lib.src.width) + 1) *
(((memWidth - 1) / lib.src.width) + 1) *
(lib.src.depth * lib.src.width + 1) // weights on # cells
System.err.println(s"Cost of ${lib.src.name} for ${mem.src.name}: ${cost}")
if (cost > area) (best, area)