Merge branch 'blackbox't push origin master

1 files changed, 68 insertions, 0 deletions

diff --git a/src/test/scala/chiselTests/BlackBox.scala b/src/test/scala/chiselTests/BlackBox.scala
new file mode 100644
index 00000000..574a6335
--- /dev/null
+++ b/src/test/scala/chiselTests/BlackBox.scala
@@ -0,0 +1,68 @@
+// See LICENSE for license details.
+
+package chiselTests
+
+import java.io.File
+import org.scalatest._
+import Chisel._
+import Chisel.testers.BasicTester
+
+class BlackBoxInverter extends BlackBox {
+  val io = new Bundle() {
+    val in = Bool(INPUT)
+    val out = Bool(OUTPUT)
+  }
+}
+
+class BlackBoxPassthrough extends BlackBox {
+  val io = new Bundle() {
+    val in = Bool(INPUT)
+    val out = Bool(OUTPUT)
+  }
+}
+
+class BlackBoxTester extends BasicTester {
+  val blackBoxPos = Module(new BlackBoxInverter)
+  val blackBoxNeg = Module(new BlackBoxInverter)
+
+  blackBoxPos.io.in := UInt(1)
+  blackBoxNeg.io.in := UInt(0)
+
+  assert(blackBoxNeg.io.out === UInt(1))
+  assert(blackBoxPos.io.out === UInt(0))
+  stop()
+}
+
+/** Instantiate multiple BlackBoxes with similar interfaces but different
+  * functionality. Used to detect failures in BlackBox naming and module
+  * deduplication.
+  */
+
+class MultiBlackBoxTester extends BasicTester {
+  val blackBoxInvPos = Module(new BlackBoxInverter)
+  val blackBoxInvNeg = Module(new BlackBoxInverter)
+  val blackBoxPassPos = Module(new BlackBoxPassthrough)
+  val blackBoxPassNeg = Module(new BlackBoxPassthrough)
+
+  blackBoxInvPos.io.in := UInt(1)
+  blackBoxInvNeg.io.in := UInt(0)
+  blackBoxPassPos.io.in := UInt(1)
+  blackBoxPassNeg.io.in := UInt(0)
+
+  assert(blackBoxInvNeg.io.out === UInt(1))
+  assert(blackBoxInvPos.io.out === UInt(0))
+  assert(blackBoxPassNeg.io.out === UInt(0))
+  assert(blackBoxPassPos.io.out === UInt(1))
+  stop()
+}
+
+class BlackBoxSpec extends ChiselFlatSpec {
+  "A BlackBoxed inverter" should "work" in {
+    assertTesterPasses({ new BlackBoxTester },
+        Seq("/BlackBoxTest.v"))
+  }
+  "Multiple BlackBoxes" should "work" in {
+    assertTesterPasses({ new MultiBlackBoxTester },
+        Seq("/BlackBoxTest.v"))
+  }
+}