created: 07/08/01; audio: 01/05/04

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CHAPTER 13 — Addition and Subtraction Instructions

This chapter discusses the MIPS instructions for performing 32-bit integer addition and subtraction. Some topics of integer representation with bit patterns are reviewed.

Chapter Topics:

Overflow in unsigned binary and two's complement (review).
The add and addu instructions.
Sign extention.
The addi and addiu instructions.
The sub and subu instructions.
Using addi to load a register with a negative integer.

QUESTION 1:

Say that a processor has a full set of bit manipulation instructions. Can it do arithmetic with these instructions?

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