Data-Parallel Vector Library

The data-parallel vector library provides data-parallel (SIMD) programming via vector types. SIMD stands for Single Instruction Multiple Data and means that one operation is performed on many data in parallel. Each modern processor architecture provides SIMD extensions, but there exists no standardised C++ interface to use them. The following table gives an overview of various SIMD extensions.

SIMD Extensions

Architecture	SIMD Extension	Register Width
ARM 32 / 64	NEON	128 bit
Power / PowerPC	AltiVec	128 bit
	VSX	128 bit
x86 / AMD 64	MMX / 3DNow	64 bit
	SSE	128 bit
	AVX / AVX2 / AVX-512	128 bit / 256 bit / 512 bit

For example, the SSE extension allows it to add four 32 bit ints in parallel. The effect is that it is...