Assembly language programming of the MIPS

1. Exercise 2 Shifting and Adding

Initialize the sum in register $8 to zero. Then add 4096₁₀ to $8 sixteen times. You don't know how to loop, yet, so do this by making 16 copies of the same instruction. The value 4096₁₀ is 0x1000.

Next initialize register $9 to 4096₁₀. Shift $9 left by the correct number of positions so that registers $8 and $9 contain the same bit pattern.

Finally, initialize aregister $10 to 4096₁₀. Add $10 to itself the correct number of times so that it contains the same bit pattern as the other two registers.

2. Exercise 4 Arithmetic Expression

Let register $8 be x and register $9 be y. Write a program to evaluate:

3x - 5y 

Leave the result in register $10. Inspect the register after running the program to check that the program works. Run the program several times, initialize x and y to different values for each run. (use X=1, Y=2)