1 files changed, 34 insertions, 0 deletions
diff --git a/chiselFrontend/src/main/scala/chisel3/core/Clock.scala b/chiselFrontend/src/main/scala/chisel3/core/Clock.scala
new file mode 100644
index 00000000..f682310b
--- /dev/null
+++ b/chiselFrontend/src/main/scala/chisel3/core/Clock.scala
@@ -0,0 +1,34 @@
+// See LICENSE for license details.
+
+package chisel3.core
+
+import chisel3.internal.Builder.{pushOp}
+import chisel3.internal.firrtl._
+import chisel3.internal.sourceinfo._
+import chisel3.internal.firrtl.PrimOp.AsUIntOp
+
+object Clock {
+  def apply(): Clock = new Clock
+}
+
+// TODO: Document this.
+sealed class Clock extends Element(Width(1)) {
+  def cloneType: this.type = Clock().asInstanceOf[this.type]
+
+  private[core] def typeEquivalent(that: Data): Boolean =
+    this.getClass == that.getClass
+
+  override def connect(that: Data)(implicit sourceInfo: SourceInfo, connectCompileOptions: CompileOptions): Unit = that match {
+    case _: Clock => super.connect(that)(sourceInfo, connectCompileOptions)
+    case _ => super.badConnect(that)(sourceInfo)
+  }
+
+  /** Not really supported */
+  def toPrintable: Printable = PString("CLOCK")
+
+  override def do_asUInt(implicit sourceInfo: SourceInfo, connectCompileOptions: CompileOptions): UInt = pushOp(DefPrim(sourceInfo, UInt(this.width), AsUIntOp, ref))
+  private[core] override def connectFromBits(that: Bits)(implicit sourceInfo: SourceInfo,
+      compileOptions: CompileOptions): Unit = {
+    this := that
+  }
+}