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In ARM assembly, what is the primary effect of executing a branch instruction?

easy📝 Conceptual Q1 of 15
ARM Architecture - Control Flow Instructions
In ARM assembly, what is the primary effect of executing a branch instruction?
AIt changes the program counter to a new address, altering the flow of execution
BIt increments the value of a register by one
CIt loads data from memory into a register
DIt performs an arithmetic operation on two registers
Step-by-Step Solution
Solution:

  1. Step 1: Understand the role of the program counter (PC)

    The PC holds the address of the next instruction to execute.

  2. Step 2: Effect of branch instruction

    A branch instruction modifies the PC to jump to a different instruction address, changing the normal sequential flow.

  3. Final Answer:

    It changes the program counter to a new address, altering the flow of execution -> Option A

  4. Quick Check:

    Branching changes PC, not arithmetic or data load [OK]
Quick Trick: Branching changes program flow by updating the program counter [OK]
Common Mistakes:
  • Confusing branching with arithmetic or data movement instructions
  • Thinking branching only affects registers, not program flow

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