Raspberry Pi Assembly Language Programming: ARM Processor Coding

© Stephen Smith 2019

S. SmithRaspberry Pi Assembly Language Programminghttps://doi.org/10.1007/978-1-4842-5287-1_10

10. Multiply, Divide, and Accumulate

Stephen Smith¹ 

(1)

Gibsons, BC, Canada

 

In this chapter, we return to mathematics. We’ve covered addition, subtraction, and a collection of bit operations on our 32-bit registers. Now we will cover multiplication and division. The ARM processor has a surplus of multiply instructions, then a dearth of division operations.

We will cover multiply with accumulate instructions. We will provide some background on why the ARM processor has so much circuitry dedicated to performing this operation. This will get us into the mechanics of vector and matrix multiplication.

Multiplication

In Chapter 7, “Linux Operating ...