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Programming with 64-Bit ARM Assembly Language: Single Board Computer Development for Raspberry Pi and Mobile Devices
book

Programming with 64-Bit ARM Assembly Language: Single Board Computer Development for Raspberry Pi and Mobile Devices

by Stephen Smith
May 2020
Intermediate to advanced
436 pages
6h 19m
English
Apress
Content preview from Programming with 64-Bit ARM Assembly Language: Single Board Computer Development for Raspberry Pi and Mobile Devices
© Stephen Smith 2020
S. SmithProgramming with 64-Bit ARM Assembly Languagehttps://doi.org/10.1007/978-1-4842-5881-1_11

11. Multiply, Divide, and Accumulate

Stephen Smith1 
(1)
Gibsons, BC, Canada
 

In this chapter, we return to using mathematics. We’ve already covered addition, subtraction, and a collection of bit operations on our 64-bit registers. Now, we will learn multiplication and division.

We will program multiply with accumulate instructions. But first of all, 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

The multiply instruction is
MUL Xd, Xn, Xm
This instruction computes Xd = Xn ∗ Xm. Looks ...
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