diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/main/scala/chisel3/util/BitPat.scala | 1 | ||||
| -rw-r--r-- | src/test/scala/chiselTests/util/BitPatSpec.scala | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/src/main/scala/chisel3/util/BitPat.scala b/src/main/scala/chisel3/util/BitPat.scala index 88e46e3c..985d22da 100644 --- a/src/main/scala/chisel3/util/BitPat.scala +++ b/src/main/scala/chisel3/util/BitPat.scala @@ -23,6 +23,7 @@ object BitPat { // If ? parsing is to be exposed, the return API needs further scrutiny // (especially with things like mask polarity). require(x.head == 'b', "BitPats must be in binary and be prefixed with 'b'") + require(x.length > 1, "BitPat width cannot be 0.") var bits = BigInt(0) var mask = BigInt(0) var count = 0 diff --git a/src/test/scala/chiselTests/util/BitPatSpec.scala b/src/test/scala/chiselTests/util/BitPatSpec.scala index a6c0acf7..ca8dd85c 100644 --- a/src/test/scala/chiselTests/util/BitPatSpec.scala +++ b/src/test/scala/chiselTests/util/BitPatSpec.scala @@ -14,4 +14,8 @@ class BitPatSpec extends AnyFlatSpec with Matchers { val testPattern = "0" * 32 + "1" * 32 + "?" * 32 + "?01" * 32 BitPat("b" + testPattern).toString should be (s"BitPat($testPattern)") } + + it should "not fail if BitPat width is 0" in { + intercept[IllegalArgumentException]{BitPat("b")} + } } |