Add support for clock and reset scoping (#509)

withClockAndReset, withReset, and withClock allow changing the implicit clock and reset.
Module.clock and Module.reset provide access to the current implicit clock and reset.

1 files changed, 3 insertions, 2 deletions

diff --git a/chiselFrontend/src/main/scala/chisel3/core/Reg.scala b/chiselFrontend/src/main/scala/chisel3/core/Reg.scala
index 30abe5e5..1287ac2f 100644
--- a/chiselFrontend/src/main/scala/chisel3/core/Reg.scala
+++ b/chiselFrontend/src/main/scala/chisel3/core/Reg.scala
@@ -68,7 +68,8 @@ object Reg {
     // to resolve all use cases. If the type inferencer / implicit resolution
     // system improves, this may be changed.
     val x = makeType(compileOptions, t, next, init)
-    val clock = Node(x._parent.get.clock) // TODO multi-clock
+    val clock = Node(Builder.forcedClock)
+    val reset = Node(Builder.forcedReset)
 
     // Bind each element of x to being a Reg
     Binding.bind(x, RegBinder(Builder.forcedModule), "Error: t")
@@ -77,7 +78,7 @@ object Reg {
       pushCommand(DefReg(sourceInfo, x, clock))
     } else {
       Binding.checkSynthesizable(init, s"'init' ($init)")
-      pushCommand(DefRegInit(sourceInfo, x, clock, Node(x._parent.get.reset), init.ref))
+      pushCommand(DefRegInit(sourceInfo, x, clock, reset, init.ref))
     }
     if (next != null) {
       Binding.checkSynthesizable(next, s"'next' ($next)")