From 2ae50411cbc5e2cd5fdc9ca4069b9c5f64919bc4 Mon Sep 17 00:00:00 2001
From: Jim Lawson
Date: Mon, 11 May 2015 13:02:03 -0700
Subject: Incorporate chisel3-tests; update Makefile.

---
 src/test/scala/ChiselTests/Pads.scala | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 src/test/scala/ChiselTests/Pads.scala

(limited to 'src/test/scala/ChiselTests/Pads.scala')

diff --git a/src/test/scala/ChiselTests/Pads.scala b/src/test/scala/ChiselTests/Pads.scala
new file mode 100644
index 00000000..a5c03d0b
--- /dev/null
+++ b/src/test/scala/ChiselTests/Pads.scala
@@ -0,0 +1,28 @@
+package ChiselTests
+import Chisel._
+
+class Pads extends Module {
+  val io = new Bundle {
+    val a   = Bits(INPUT,  4)
+    val asp = Bits(OUTPUT, 8)
+    val aup = Bits(OUTPUT, 8)
+  }
+  io.asp := io.a.toSInt
+  io.aup := io.a.toUInt
+}
+
+class PadsTester(c: Pads) extends Tester(c) {
+  def pads(x: BigInt, s: Int, w: Int) = {
+    val sign  = (x & (1 << (s-1)))
+    val wmask = (1 << w) - 1
+    val bmask = (1 << s) - 1
+    if (sign == 0) x else ((~bmask | x) & wmask)
+  }
+  for (t <- 0 until 16) {
+    val test_a = rnd.nextInt(1 << 4)
+    poke(c.io.a, test_a)
+    step(1)
+    expect(c.io.asp, pads(test_a, 4, 8))
+    expect(c.io.aup, test_a)
+  }
+}
-- 
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