2 files changed, 5 insertions, 6 deletions
diff --git a/src/main/scala/chisel3/util/BitPat.scala b/src/main/scala/chisel3/util/BitPat.scala
index 8d6565fb..3a3a7061 100644
--- a/src/main/scala/chisel3/util/BitPat.scala
+++ b/src/main/scala/chisel3/util/BitPat.scala
@@ -74,9 +74,8 @@ object BitPat {
     * @note the UInt must be a literal
     */
   def apply(x: UInt): BitPat = {
-    require(x.isLit)
     val len = if (x.isWidthKnown) x.getWidth else 0
-    apply("b" + x.litValue.toString(2).reverse.padTo(len, "0").reverse.mkString)
+    apply("b" + x.litToBigInt.toString(2).reverse.padTo(len, "0").reverse.mkString)
   }
 }
 
@@ -93,7 +92,7 @@ sealed class BitPat(val value: BigInt, val mask: BigInt, width: Int) {
   def getWidth: Int = width
   def === (that: UInt): Bool = macro SourceInfoTransform.thatArg
   def =/= (that: UInt): Bool = macro SourceInfoTransform.thatArg
-  
+
   def do_=== (that: UInt)  // scalastyle:ignore method.name
       (implicit sourceInfo: SourceInfo, compileOptions: CompileOptions): Bool = {
     value.asUInt === (that & mask.asUInt)
@@ -102,7 +101,7 @@ sealed class BitPat(val value: BigInt, val mask: BigInt, width: Int) {
       (implicit sourceInfo: SourceInfo, compileOptions: CompileOptions): Bool = {
     !(this === that)
   }
-  
+
   def != (that: UInt): Bool = macro SourceInfoTransform.thatArg
   @chiselRuntimeDeprecated
   @deprecated("Use '=/=', which avoids potential precedence problems", "chisel3")
diff --git a/src/main/scala/chisel3/util/Conditional.scala b/src/main/scala/chisel3/util/Conditional.scala
index 860ffde3..f558b7ba 100644
--- a/src/main/scala/chisel3/util/Conditional.scala
+++ b/src/main/scala/chisel3/util/Conditional.scala
@@ -28,8 +28,8 @@ class SwitchContext[T <: Bits](cond: T, whenContext: Option[WhenContext], lits:
   def is(v: Iterable[T])(block: => Unit): SwitchContext[T] = {
     if (!v.isEmpty) {
       val newLits = v.map { w =>
-        require(w.isLit, "is conditions must be literals!")
-        val value = w.litValue
+        require(w.litToBigIntOption != None, "is condition must be literal")
+        val value = w.litToBigInt
         require(!lits.contains(value), "all is conditions must be mutually exclusive!")
         value
       }