diff options
| -rw-r--r-- | src/main/scala/chisel3/util/BitPat.scala | 7 | ||||
| -rw-r--r-- | src/test/scala/chiselTests/util/BitPatSpec.scala | 17 |
2 files changed, 24 insertions, 0 deletions
diff --git a/src/main/scala/chisel3/util/BitPat.scala b/src/main/scala/chisel3/util/BitPat.scala index 12a421a0..5a40d312 100644 --- a/src/main/scala/chisel3/util/BitPat.scala +++ b/src/main/scala/chisel3/util/BitPat.scala @@ -119,4 +119,11 @@ sealed class BitPat(val value: BigInt, val mask: BigInt, width: Int) extends Sou !(this === that) } + override def toString = { + "BitPat(" + + (0 until width).map(i => + if (((mask >> i) & 1) == 1) if (((value >> i) & 1) == 1) "1" else "0" else "?" + ).reverse.reduce(_ + _) + + ")" + } } diff --git a/src/test/scala/chiselTests/util/BitPatSpec.scala b/src/test/scala/chiselTests/util/BitPatSpec.scala new file mode 100644 index 00000000..a6c0acf7 --- /dev/null +++ b/src/test/scala/chiselTests/util/BitPatSpec.scala @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: Apache-2.0 + +package chiselTests.util + +import chisel3.util.BitPat +import org.scalatest.flatspec.AnyFlatSpec +import org.scalatest.matchers.should.Matchers + + +class BitPatSpec extends AnyFlatSpec with Matchers { + behavior of classOf[BitPat].toString + + it should "convert a BitPat to readable form" in { + val testPattern = "0" * 32 + "1" * 32 + "?" * 32 + "?01" * 32 + BitPat("b" + testPattern).toString should be (s"BitPat($testPattern)") + } +} |