fix: missing files from git

npc/core/src/test/scala/Reg.scala

@@ -0,0 +1,71 @@
+import chisel3._
+import chiseltest._
+import org.scalatest.freespec.AnyFreeSpec
+
+class RegisterFileSpec extends AnyFreeSpec with ChiselScalatestTester {
+  "RegisterFile should work" - {
+    "with 2 read ports" in {
+      test(new RegisterFile(2)) { c =>
+        def readExpect(addr: Int, value: Int, port: Int = 0): Unit = {
+          c.io.readAddr(port).poke(addr.U)
+          c.io.readData(port).expect(value.U)
+        }
+        def write(addr: Int, value: Int): Unit = {
+          c.io.writeEnable.poke(true.B)
+          c.io.writeData.poke(value.U)
+          c.io.writeAddr.poke(addr.U)
+          c.clock.step(1)
+          c.io.writeEnable.poke(false.B)
+        }
+        // everything should be 0 on init
+        for (i <- 0 until 32) {
+          readExpect(i, 0, port = 0)
+          readExpect(i, 0, port = 1)
+        }
+
+        // write 5 * addr + 3
+        for (i <- 0 until 32) {
+          write(i, 5 * i + 3)
+        }
+
+        // check that the writes worked
+        for (i <- 0 until 32) {
+          readExpect(i, if (i == 0) 0 else 5 * i + 3, port = i % 2)
+        }
+      }
+    }
+  }
+}
+
+class MuxGeneratorSpec extends AnyFreeSpec with ChiselScalatestTester {
+  "MuxGenerator should work" - {
+    "when there are 2 inputs" in {
+      test(new MuxGenerator(8, 2)) { c =>
+        c.io.in(0).poke(0.U)
+        c.io.in(1).poke(1.U)
+        c.io.sel.poke(0.U)
+        c.io.out.expect(0.U)
+        c.io.sel.poke(1.U)
+        c.io.out.expect(1.U)
+      }
+    }
+    "when there are 1024 inputs" in {
+      test(new MuxGenerator(32, 1024)) { c =>
+        for (i <- 0 until 1024) {
+          c.io.in(i).poke(i.U)
+        }
+        for (i <- 0 until 1024) {
+          c.io.sel.poke(i.U)
+          c.io.out.expect(i.U)
+        }
+      }
+    }
+  }
+  "MuxGenerator should raise exception" - {
+    "when nInput is not 2^n" in {
+      assertThrows[IllegalArgumentException] {
+        test(new MuxGenerator(8, 3)) { c => }
+      }
+    }
+  }
+}