Chapter 4, Problem 4.50HW

In Section 3.6.8, we saw that a common way to implement switch statements is to create a set of code blocks and then index those blocks using a jump table. Consider the C code shown, in Figure 4.69 for a function switchv, along with associated test code.

  Implement switchv in Y86-64 using a jump table. Although the Y86-64 instruction set does not include an indirect jump instruction, you can get the same effect by pushing a computed address onto-the stack and then executing the ret instruction. Implement test code similar to what is shown in C to demonstrate that your implementation of switchv will handle both the cases handled explicitly as well as those that trigger the default case.

  Figure 4.69 Switch statement can be translated into Y86-64 code. This requires implementation of a jump table.