RP2040 Assembly Language Programming: ARM Cortex-M0+ on the Raspberry Pi Pico

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2022

S. SmithRP2040 Assembly Language Programminghttps://doi.org/10.1007/978-1-4842-7753-9_12

12. Multiplication, Division, and Floating Point

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 32-bit registers. Now we learn how to perform multiplication, division, interpolation, and floating point, starting with multiplication.

Multiplication

Integer 32-bit multiplication is built into the ARM Cortex-M0+, and the instruction set includes the MUL instruction :

MUL Rd, Rn

This instruction calculates Rd = Rd * Rn and executes in one clock cycle. ...