Branch instruction (B) in ARM Architecture - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to write a branch instruction that jumps to the label 'loop'.

ARM Architecture

B [1]

Drag options to blanks, or click blank then click option'

Astart

Bloop

Cend

Dmain

Attempts:

3 left

💡 Hint

Common Mistakes

Using a label that does not exist in the code.

Forgetting to write the label after the B instruction.

The B instruction is used to branch (jump) to a label. Here, the label is loop.

2fill in blank

medium

Complete the code to branch to the label 'exit' conditionally.

ARM Architecture

B[1] exit

Drag options to blanks, or click blank then click option'

AGT

BAL

CEQ

DNE

Attempts:

3 left

💡 Hint

Common Mistakes

Using unconditional branch (B) when a condition is needed.

Using wrong condition codes that do not match the desired condition.

The B instruction with condition EQ branches if the zero flag is set (equal condition).

3fill in blank

hard

Fix the error in the branch instruction to correctly jump to 'func'.

ARM Architecture

B [1]

Drag options to blanks, or click blank then click option'

Afunc

Bfunc()

C#func

D*func

Attempts:

3 left

💡 Hint

Common Mistakes

Adding parentheses after the label name.

Using immediate value syntax (#) incorrectly.

The branch instruction requires the label name without parentheses or symbols. Use func directly.

4fill in blank

hard

Fill both blanks to create a conditional branch that jumps to 'retry' if greater than zero.

ARM Architecture

B[1] [2]

Drag options to blanks, or click blank then click option'

AGT

BLT

Cretry

Dfail

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong condition code like LT instead of GT.

Jumping to the wrong label.

GT means branch if greater than (signed comparison). The label to jump to is retry.

5fill in blank

hard

Fill all three blanks to create a branch instruction with condition 'NE' to label 'loop_start' and add a comment.

ARM Architecture

B[1] [2] ; [3]

Drag options to blanks, or click blank then click option'

ANE

Bloop_start

Cbranch if not equal

DEQ

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong condition code like EQ instead of NE.

Forgetting to add a comment or using an unclear comment.

The instruction branches if not equal (NE) to the label loop_start. The comment explains the purpose.