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-rw-r--r--src/main/scala/chisel3/util/Bitwise.scala1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/main/scala/chisel3/util/Bitwise.scala b/src/main/scala/chisel3/util/Bitwise.scala
index bbed5f07..4681b34a 100644
--- a/src/main/scala/chisel3/util/Bitwise.scala
+++ b/src/main/scala/chisel3/util/Bitwise.scala
@@ -61,6 +61,7 @@ object Fill {
/** Create n repetitions of x using a tree fanout topology.
*
* Output data-equivalent to x ## x ## ... ## x (n repetitions).
+ * @throws java.lang.IllegalArgumentException if `n` is less than zero
*/
def apply(n: Int, x: UInt): UInt = {
n match {