[Solved] Given the ARM assembly snippet:CMP R0, #10 BEQ equal_label MOV R1, #0 B end_label equal_label: MOV R1, #1 end_label:What value will R1 hold if R0 equals 10? | ARM Architecture

ARM Architecture - Control Flow Instructions

Given the ARM assembly snippet:

CMP R0, #10
BEQ equal_label
MOV R1, #0
B end_label
equal_label:
MOV R1, #1
end_label:

What value will R1 hold if R0 equals 10?

A0

B10

CUndefined

D1

Step-by-Step Solution

Solution:

Step 1: Analyze CMP and BEQ
The CMP compares R0 with 10. If equal, BEQ jumps to equal_label.
Step 2: Follow the branch logic
If R0 is 10, execution jumps to equal_label where R1 is set to 1. Otherwise, R1 is set to 0 before jumping to end_label.
Final Answer:
1 -> Option D
Quick Check:
R0=10 triggers BEQ, sets R1=1 [OK]

Quick Trick: If equal, BEQ jumps to set R1=1 [OK]

Common Mistakes:

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