diff options
| -rw-r--r-- | src/main/scala/chisel3/util/BitPat.scala | 1 | ||||
| -rw-r--r-- | src/test/scala/chiselTests/util/BitPatSpec.scala | 8 |
2 files changed, 9 insertions, 0 deletions
diff --git a/src/main/scala/chisel3/util/BitPat.scala b/src/main/scala/chisel3/util/BitPat.scala index d607be4f..4b94879f 100644 --- a/src/main/scala/chisel3/util/BitPat.scala +++ b/src/main/scala/chisel3/util/BitPat.scala @@ -89,6 +89,7 @@ object BitPat { * @note the UInt must be a literal */ def apply(x: UInt): BitPat = { + require(x.isLit, s"$x is not a literal, BitPat.apply(x: UInt) only accepts literals") val len = if (x.isWidthKnown) x.getWidth else 0 apply("b" + x.litValue.toString(2).reverse.padTo(len, "0").reverse.mkString) } diff --git a/src/test/scala/chiselTests/util/BitPatSpec.scala b/src/test/scala/chiselTests/util/BitPatSpec.scala index 0c83493f..e14b4496 100644 --- a/src/test/scala/chiselTests/util/BitPatSpec.scala +++ b/src/test/scala/chiselTests/util/BitPatSpec.scala @@ -28,6 +28,14 @@ class BitPatSpec extends AnyFlatSpec with Matchers { (BitPat.Y(4) ## BitPat.dontCare(3) ## BitPat.N(2)).toString should be (s"BitPat(1111???00)") } + it should "throw when BitPat apply to a Hardware" in { + intercept[java.lang.IllegalArgumentException]{ + chisel3.stage.ChiselStage.emitChirrtl(new chisel3.Module { + BitPat(chisel3.Reg(chisel3.Bool())) + }) + } + } + it should "index and return new BitPat" in { val b = BitPat("b1001???") b(0) should be(BitPat.dontCare(1)) |