Quiz submission record for quiz5-1-1 at Mon Jul 19 00:16:06 2004:

Your Answer for Question 1:
The more simple the ISA requires less hardware and makes each part more reusable.  For example, using the same ALU for slt, add, sub.  This makes operations take less time since it must wait for clock cycles anyway to read and write data.

Your Answer for Question 2:
The RegWrite signal is turned on whenever data is being written to a register after passsing through the register file.

Your Answer for Question 3:
The Add unit is used to calculate the target of a branch.  It would be possible to use a single ALU to do the addition of the branch, but the Add unit is also used for other memory address purposes, such as incrementing the PC by 4 bytes to the next piece of information in memory.  However, using the same unit would greatly slow the time of these operations, such as PC+4, which occur extremely often.


Your unique submission ID is quiz5-1-1-cs61c-an-1090221366-2212.