Add placeholder tensor core DPU module

src/test/scala/radiance/TensorDPUTest.scala

@@ -0,0 +1,41 @@
+package radiance.core
+
+import chisel3._
+import chisel3.stage.PrintFullStackTraceAnnotation
+import chisel3.util._
+import chiseltest._
+import chiseltest.simulator.VerilatorFlags
+import org.scalatest.flatspec.AnyFlatSpec
+
+class MulAddTest extends AnyFlatSpec with ChiselScalatestTester {
+  behavior of "MulAddRecFNPipe"
+
+  it should "do basic arithmetic" in {
+    test(new MulAddRecFNPipe(2, 8, 23))
+      // .withAnnotations(Seq(WriteVcdAnnotation))
+      { c =>
+        c.io.validin.poke(true.B)
+        // 0: MADD
+        // 1: MSUB
+        // 2: NMSUB
+        // 3: NMADD
+        c.io.op.poke(0.U)
+        // rounding mode (p.113 of spec)
+        // 0: round to nearest, ties to even
+        c.io.roundingMode.poke(0.U)
+        c.io.detectTininess.poke(hardfloat.consts.tininess_beforeRounding)
+        c.io.a.poke(0x3f800000.U/*2.0*/)
+        c.io.b.poke(0x3f800000.U/*3.0*/)
+        c.io.c.poke(0x00000000.U/*0.0*/)
+        c.clock.step()
+        c.io.validin.poke(false.B)
+        c.io.validout.expect(false.B)
+        c.clock.step()
+        c.io.validout.expect(true.B)
+        c.io.out.expect(0x40c00000.U/*6.0*/)
+        c.clock.step()
+        c.io.validout.expect(false.B)
+      }
+  }
+}
+