Fix "fix" for negative literals > 32 bits

Overflow of 32-bit Int would cause any negative literal value equal to
-(2^(width % 32 - 1)) where width >= 32 to be incorrectly inverted

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main/scala/firrtl/transforms/FixAddingNegativeLiteralsTransform.scala b/src/main/scala/firrtl/transforms/FixAddingNegativeLiteralsTransform.scala
index 2ba28ebb..d1520eae 100644
--- a/src/main/scala/firrtl/transforms/FixAddingNegativeLiteralsTransform.scala
+++ b/src/main/scala/firrtl/transforms/FixAddingNegativeLiteralsTransform.scala
@@ -17,7 +17,7 @@ object FixAddingNegativeLiterals {
     * @param width width of the negative number
     * @return maximum negative number
     */
-  def minNegValue(width: BigInt): BigInt = -(1 << (width.toInt - 1))
+  def minNegValue(width: BigInt): BigInt = -(BigInt(1) << (width.toInt - 1))
 
   /** Updates the type of the DoPrim from its arguments (e.g. if is UnknownType)
     * @param d input DoPrim