Fused Multiply-Add extension
The Fused Multiply-Add extension optionally extends the VFPv3 and the NEON architectures.
It provides VFP and NEON 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 NEON or VFP systems that implement the fused multiply-add extension. The VFP system that implements the fused multiply-add extension is VFPv4.