In this chapter, we’ll look at what the floating-point unit (FPU) does. Some ARM documentation refers to this as the vector floating-point (VFP) coprocessor to promote the fact that it can do some limited vector processing. Any vector processing in the FPU is now replaced by the much better parallel processing provided by the NEON coprocessor, which we will study in Chapter 13, “Neon Coprocessor.” Regardless, the FPU provides several useful instructions for performing floating-point mathematics.
We’ll review what floating-point numbers are, how they’re represented ...
