core.ALU: add bypass funcs

src/main/scala/uk/ac/soton/ecs/can/core/ALU.scala

@@ -42,7 +42,9 @@ class ALU(implicit cfg: CanCoreConfiguration) extends MultiIOModule {
       CanCoreALUFunction.columnarRound.U -> columnarRound.out,
       CanCoreALUFunction.diagonalRound.U -> diagonalRound.out,
       CanCoreALUFunction.add.U -> adder.out,
-      CanCoreALUFunction.xor.U -> xorer.out
+      CanCoreALUFunction.xor.U -> xorer.out,
+      CanCoreALUFunction.a.U -> a,
+      CanCoreALUFunction.b.U -> b
     )
   )
 }

src/main/scala/uk/ac/soton/ecs/can/core/ProgramMemory.scala

@@ -4,9 +4,9 @@
 package uk.ac.soton.ecs.can.core
 
 import chisel3._
-import chisel3.util.{MuxLookup, log2Ceil}
-import uk.ac.soton.ecs.can.types._
+import chisel3.util.log2Ceil
 import uk.ac.soton.ecs.can.config.CanCoreConfiguration
+import uk.ac.soton.ecs.can.types._
 
 class ProgramMemory(implicit cfg: CanCoreConfiguration) extends MultiIOModule {
   private val addrWidth = log2Ceil(cfg.programMemoryWords)

src/main/scala/uk/ac/soton/ecs/can/types/CanCoreALUFunction.scala

@@ -8,6 +8,8 @@ case object CanCoreALUFunction {
   val diagonalRound = 3
   val add = 4
   val xor = 5
+  val a = 6
+  val b = 7
 
-  def requiredWidth = log2Ceil(xor)
+  def requiredWidth = log2Ceil(b)
 }