8.3 Fused Multiply-Add extension for VFP
The Fused Multiply-Add extension optionally extends the VFPv3 architecture.
It provides VFP instructions that perform multiply and accumulate
operations with a single rounding step, so suffers from less loss of accuracy than
performing a multiplication followed by an add.
The fused multiply-add instructions are only available on VFP systems that
implement the fused multiply-add extension. The VFP system that implements the fused
multiply-add extension is VFPv4.