[Solved] What is wrong with this Thumb-2 code snippet?IT NE MOVNE R0, #1 MOVNE R1, #2 MOVNE R2, #3 MOVNE R3, #4 MOVNE R4, #5 | ARM Architecture

ARM Architecture - Control Flow Instructions

What is wrong with this Thumb-2 code snippet?

IT NE
MOVNE R0, #1
MOVNE R1, #2
MOVNE R2, #3
MOVNE R3, #4
MOVNE R4, #5

AMOVNE instructions are invalid after IT NE

BIT block exceeds maximum allowed instructions

CIT instruction must be followed by unconditional instructions

DMOVNE cannot be used with immediate values

Step-by-Step Solution

Solution:

Step 1: Count instructions after IT
There are five MOVNE instructions following IT NE.
Step 2: Recall IT block size limit
IT block can only conditionally execute up to four instructions.
Final Answer:
IT block exceeds maximum allowed instructions -> Option B
Quick Check:
IT block max instructions = 4 [OK]

Quick Trick: IT block max 4 instructions, no more [OK]

Common Mistakes:

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What is wrong with this Thumb-2 code snippet?