What is the effect of the following sequence of RTL instructions? Describe each one individually and state the overall effect of these operations. Note that the notation [x] means the contents of memory location x.
a. [5] ? 2
b. [6] ? 12
c. [7] ? [5] + [6]
d. [6] ? [7] + 4
e. [5] ? [[5] + 4]
[5] ? 2 The value 2 is loaded into (memory) location 5
[6] ? 12 The value 12 is loaded into location 6
[7] ? [5] + [6] The sum of the contents of locations 5 and 6 are loaded into location 7. In this case, the value
2 + 12 = 14 is loaded into location 7
[6] ? [7] ? 9 The contents of location 7 (i.e., 14) minus 9 are loaded into location 6; that is, location 6 is loaded with 5.
[5] ? [[5] + 4] The contents of location 5 are read and then 4 is added to the result. This new value (i.e., 2 +4 = 6) is loaded into memory location 5. The contents of 6, i.e., 5, are loaded into location 5.
At the end of this code fragment [5] = 5, [6] = 5, [7] = 14
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