Difference between ARM and THUMB mode?

All Questions › Category: Embedded System › Difference between ARM and THUMB mode?
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Chetan Shidling Staff asked 5 years ago

I need short information.

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Chetan Shidling Staff answered 5 years ago

ARM

  1. CPSR register can be updated.
  2. Pre-index and post-index addressing modes.
  3. The instructions can be executed conditionally or unconditionally.
  4. Three-format mode.
  5. Memory usage is more.

THUMB

  1. Lower register must be used for CPSR updation.
  2. Only pre-index addressing mode.
  3. All the instructions are executed unconditionally except branch condition.
  4. Two-format mode.
  5. Memory usage is less.