> configure(npc)

ysyx_22040000 李心杨
 Linux calcite 6.1.69 #1-NixOS SMP PREEMPT_DYNAMIC Wed Dec 20 16:00:29 UTC 2023 x86_64 GNU/Linux
  12:59:00  up 1 day 21:45,  2 users,  load average: 1.24, 1.19, 0.81

npc/core/src/main/scala/Main.scala

@@ -25,6 +25,36 @@ class RegisterFile(readPorts: Int) extends Module {
   }
 }
 
+class ALUGenerator(width: Int) extends Module {
+  require(width >= 0)
+  val io = IO(new Bundle {
+    val a = Input(UInt(width.W))
+    val b = Input(UInt(width.W))
+    val op = Input(UInt(4.W))
+    val out = Output(UInt(width.W))
+  })
+
+  val adder_b = fill(width)(io.op(0)) ^ io.b  // take (-b) if sub
+  val add = io.a + adder_b
+  val and = io.a & io.b
+  val not = ~io.a
+  val or = io.a | io.b
+  val xor = io.a ^ io.b
+  val slt = io.a < io.b
+  val eq = io.a === io.b
+
+  io.out := MuxLookup(0.U, io.op, Seq(
+    0.U -> add,
+    1.U -> add, // add with b reversed
+    2.U -> not,
+    3.U -> and,
+    4.U -> or,
+    5.U -> xor,
+    6.U -> slt,
+    7.U -> eq,
+  ))
+}
+
 class MuxGenerator(width: Int, nInput: Int) extends Module {
   require(width >= 0)
   require(nInput >= 1)