Merge pull request #1283 from freechipsproject/fix-bitpat-whitespace

BitPat supports whitespace and underscores

1 files changed, 12 insertions, 2 deletions

diff --git a/src/test/scala/chiselTests/Decoder.scala b/src/test/scala/chiselTests/Decoder.scala
index 59ad6324..44cacccc 100644
--- a/src/test/scala/chiselTests/Decoder.scala
+++ b/src/test/scala/chiselTests/Decoder.scala
@@ -36,8 +36,18 @@ class DecoderSpec extends ChiselPropSpec {
   val bitpatPair = for(seed <- Arbitrary.arbitrary[Int]) yield {
     val rnd = new scala.util.Random(seed)
     val bs = seed.toBinaryString
-    val bp = bs.map(if(rnd.nextBoolean) _ else "?").mkString
-    ("b" + bs, "b" + bp)
+    val bp = bs.map(if(rnd.nextBoolean) _ else "?")
+
+    // The following randomly throws in white space and underscores which are legal and ignored.
+    val bpp = bp.map { a =>
+      if (rnd.nextBoolean) {
+        a
+      } else {
+        a + (if (rnd.nextBoolean) "_" else " ")
+      }
+    }.mkString
+
+    ("b" + bs, "b" + bpp)
   }
   private def nPairs(n: Int) = Gen.containerOfN[List, (String,String)](n,bitpatPair)