[Solved] What will be the output value in register r3 after executing:CMP r4, #10 BLT less_than_ten MOV r3, #100 B end less_than_ten: MOV r3, #50 end:if r4 contains 8? | ARM Architecture

ARM Architecture - Control Flow Instructions

What will be the output value in register r3 after executing:

CMP r4, #10
BLT less_than_ten
MOV r3, #100
B end
less_than_ten:
MOV r3, #50
end:

if r4 contains 8?

A0

B100

C8

D50

Step-by-Step Solution

Solution:

Step 1: Evaluate CMP and BLT
CMP compares r4 with 10; since r4=8, less than 10, BLT branch is taken to less_than_ten.
Step 2: Follow branch instructions
At less_than_ten, MOV r3, #50 executes; the instruction MOV r3, #100 is skipped.
Final Answer:
r3 will be 50 -> Option D
Quick Check:
r4 < 10 triggers BLT, sets r3=50 [OK]

Quick Trick: BLT branches if less, sets r3=50 here [OK]

Common Mistakes:

Master "Control Flow Instructions" in ARM Architecture

9 interactive learning modes - each teaches the same concept differently

More ARM Architecture Quizzes

What will be the output value in register r3 after executing: