Problem 1: Multiple Choice (20 points) For each question below, underline or circle the most appropriate answer o A key difference between EPIC/VLIW and Superscalar processors is (a) EPIC/VLIW requires dependency free code whereas superscalar does not (b) EPIC/VLIW uses multiple functional units whereas supersca (c) Superscalar has to deal with branches whereas EPICVLIW does not (d) Superscalar can benefit from loop unrolling whereas EPIC/VLIW cannot lar does not o If an exception occurs during speculative execution (a) the exception must never be processed (b) the exception handling must be deferred until branch outcome is known (c) the exception must be processed as soon as it occurs (d) no exceptions occur during speculation In a speculative, out-of-order execution superscalar processor using Tomasulo's method (a) registers are written into as soon as instruction completes (b) functional units are not released until instructions are committed (c) writes to registers are deferred until instruction is committed and retired (d) no results are broadcast on the Common Data bus Out of order execution allows (a) Instructions fetched after a stalled instruction to proceed to execution (b) only instructions fetched before a stalled instruction to proceed to execution (c) stalled instructions to execute before they are ready o o (d) none of the above o The theoretical limit on the maximum performance (i.e., minimum time) of a piece of code determined by (a) the number of functional units in the processor (b) the number of instructions in the code (c) the dataflow limit, also known as critical path (d) the clock cycle of the processor