Rearrange your code from 4.18.1 to achieve better

Chapter 4, Problem 4.18.3

(choose chapter or problem)

In this exercise we compare the performance of 1-issue and 2-issue processors, taking into account program transformations that can be made to optimize for 2-issue execution. Problems in this exercise refer to the following loop (written in C):

\(\begin{array}{r}\text { for }(i=0 ; i !=j ; i+=2) \\\quad b[i]=a[i]-a[i+1]\end{array}\)

When writing MIPS code, assume that variables are kept in registers as follows, and that all registers except those indicated as Free are used to keep various variables, so they cannot be used for anything else.

Rearrange your code from 4.18.1 to achieve better performance on a 2-issue statically scheduled processor from Figure 4.69.