The ALU for bit 31 shown in the book and in class supported the set on less than (slt) instruction using just the sign bit of Result31. Try this operation on the decimal values a = -7 and b = 6, using a 4-bit, 2's complement representation. Show that this example produces an incorrect value of the Set output. Therefore the Overflow output must also be used to compute Set. Modify ALU31 to handle slt correctly. Show your design on a copy of the figure. (P&H, Second Edition, Problem 4.23)

Operation Ainvert Binvert Carryln 0 0 Result 0 2 3 Less set Overflow Overflow detection Operation Ainvert Binvert Carryln 0 0 Result 0 2 3 Less set Overflow Overflow detection