Consider the code fragment: Assume a machine that uses the delay model of Example 10.6 (loads take two clocks, all other instructions take one clock). Also assume that the machine can execute any two...

Consider the code fragment:




Assume a machine that uses the delay model of Example 10.6 (loads take two clocks, all other instructions take one clock). Also assume that the machine can execute any two instructions at once. Find a shortest possible execution of this fragment. Do not forget to consider which register is best used for each of the copy steps. Also, remember to exploit the information given by register descriptors as was described in Section 8.6, to avoid unnecessary loads and stores.

Example 10.6