Consider the following MIPS instruction: add $t1, $t2, $t3 a. What is the ALUSrc control signal value: top or bottom? b. What is the MemtoReg control signal value: top or bottom? c. What is the PCSrc control signal value: top or bottom

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Consider the following MIPS instruction: add $t1, $t2, $t3

a. What is the ALUSrc control signal value: top or bottom?

b. What is the MemtoReg control signal value: top or bottom?

c. What is the PCSrc control signal value: top or bottom?

PC
Read
address
Add
Instruction
Instruction
memory
Read
register 1
Read
register 2
Registers Read
data 2
Write
register
Write
data
RegWrite
Read
data 1
16
Sign-
extend
32
Shift
left 2
ALUSrc
E3X
Add
ALU
result
ALU operation
Zero
ALU ALU
PCSrc
result
Address
MemWrite
MemRead
Read
data
Write Data
data
memory
MemtoReg
MUX
Transcribed Image Text:PC Read address Add Instruction Instruction memory Read register 1 Read register 2 Registers Read data 2 Write register Write data RegWrite Read data 1 16 Sign- extend 32 Shift left 2 ALUSrc E3X Add ALU result ALU operation Zero ALU ALU PCSrc result Address MemWrite MemRead Read data Write Data data memory MemtoReg MUX
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