Question

a) What is the static instruction count and what is the dynamic instruction count?

   
        li    $t1, 10
        addi  $s2, $0, 0
LOOP:   slt   $t2, $0, $t1
        beq   $t2, $0, DONE
        addi  $t1, $t1, -1
        addi  $s2, $s2, 2
        j     LOOP

DONE:

Answer 1

Solution: Dynamic instructions within a program actually refer to the instructions that have been implemented by the CPU in order to implement a particular or specific functionality within the code such as for, while, do-while loops, etc. On the other hand, all the other instructions within the program code that are for normal execution of the code are known as static instructions for example, declaration and initialization of variables, print statements, etc.

Now, talking about the code that is being provided above, the number of dynamic instructions are: 4

LOOP:   slt   $t2, $0, $t1                -1 dynamic instruction 
        beq   $t2, $0, DONE               -2 dynamic instruction
        addi  $t1, $t1, -1                -3 dynamic instruction
        addi  $s2, $s2, 2                 -4 dynamic instruction
        j     LOOP

The total number of static instructions is: 2

        li    $t1, 10        -1 static instruction
        addi  $s2, $0, 0     -2 static instruction

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