Implemented register to register instructions

src/build/asm/Instructions.go

@@ -13,6 +13,17 @@ func (a *Assembler) MoveRegisterNumber(reg cpu.Register, number uint64) {
 	})
 }
 
+// MoveRegisterRegister moves a register value into another register.
+func (a *Assembler) MoveRegisterRegister(destination cpu.Register, source cpu.Register) {
+	a.Instructions = append(a.Instructions, Instruction{
+		Mnemonic: MOVE,
+		Data: &RegisterRegister{
+			Destination: destination,
+			Source:      source,
+		},
+	})
+}
+
 // Label adds a label at the current position.
 func (a *Assembler) Label(name string) {
 	a.Instructions = append(a.Instructions, Instruction{