In this exercise, well examine quantitatively the pros and cons of adding an addressing mode to RISC-V that allows arithmetic instructions to directly access memory, as found on the 80x86. The primary benefit is that fewer instructions will be executed because we wont have to first load a register. The primary disadvantage is that the cycle time will have to increase to account for the additional time to read memory. Consider adding a new instruction addm $t2, 100($t3) $t2 = $t2 + Memory[$t3 + 100] Assume that the new instruction will cause the cycle time to increase by 10%. Use the instruction frequencies for gcc benchmark from the following table: Instruction Average CPI Frequency gcc spice Arithmetic 1.0 48% 50% Data transfer 1.4 33% 41% Conditional branch 1.7 17% 8% Jump 1.2 2% 1%