Any usable SIMD implementation?

[Marco Leise via Digitalmars-d]

The system seems to call CPUID at startup and for every
multiversioned function, patch an offset in its dispatcher
function. The dispatcher function is then nothing more than a
jump realtive to RIP, e.g.:

  jmp    QWORD PTR [rip+0x200bf2]

This is as efficient as it gets short of using whole-program
optimization.

-- 
Marco