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-rw-r--r--src/main/scala/chisel3/package.scala2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/main/scala/chisel3/package.scala b/src/main/scala/chisel3/package.scala
index 774455c4..926ca00d 100644
--- a/src/main/scala/chisel3/package.scala
+++ b/src/main/scala/chisel3/package.scala
@@ -111,8 +111,10 @@ package object chisel3 {
def do_=/= (that: BitPat)(implicit sourceInfo: SourceInfo): Bool = that =/= x
}
+ // Compatibility with existing code.
val INPUT = chisel3.core.Direction.Input
val OUTPUT = chisel3.core.Direction.Output
val NODIR = chisel3.core.Direction.Unspecified
type ChiselException = chisel3.internal.ChiselException
+ type ValidIO[+T <: Data] = chisel3.util.Valid[T]
}