What is the single MIPS instruction or the shortest sequence of MIPS instruction

Question

What is the single MIPS instruction or the shortest sequence of MIPS instructions that performs:

e. y[30] = y[40] + x, assuming x corresponds to register R9, and y is an array of integers with y[0] an integer at the memory location 1,048,596

f. x = y * w, assuming x, y, and w are integer variables in memory locations 4000,2000, and 3004, respectively.

g. if (x => y) Goto lab1
Assume that variable x corresponds to a word at memory address 800, and variable y corresponds to a word at memory address 1000. The instruction with lab1 is after the branch instruction and there are 30 instructions between those two instructions.

Explanation / Answer

e.
lw $t0, 1048596
addi $t1, $t0, 120 # y[30] address
addi $t0, $t0, 160 # y[40] address
addi ($ti), ($t0), 10 # y[30] = y[40] + 10


f.
lw $t0, ($2000)    # value of y
lw $t1, ($3004)    # value of w
mul ($4000), ($t1), ($t0)

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