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In ARM assembly, how does branching combined with condition flags control program decisions?

hard📝 Application Q9 of 15
ARM Architecture - Control Flow Instructions
In ARM assembly, how does branching combined with condition flags control program decisions?
ABranching ignores condition flags and always jumps
BBranching sets condition flags automatically
CCondition flags only affect arithmetic, not branching
DCondition flags set by instructions determine if a branch is taken, enabling decision-making
Step-by-Step Solution
Solution:

  1. Step 1: Understand condition flags

    Instructions like CMP set flags (zero, negative, carry) based on results.

  2. Step 2: Link flags to branching

    Branch instructions check these flags to decide whether to jump, enabling conditional decisions.

  3. Final Answer:

    Condition flags set by instructions determine if a branch is taken, enabling decision-making -> Option D

  4. Quick Check:

    Flags control branch decisions [OK]
Quick Trick: Branching depends on flags set by prior instructions [OK]
Common Mistakes:
  • Thinking branches ignore flags
  • Assuming flags only affect math

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