Speed kills

[Luc J. Bourhis via Digitalmars-d]

On Wednesday, 17 February 2016 at 19:01:38 UTC, Basile B. wrote:
> The oldest 32 bit processor (X86) doesn't support SSE, maybe 
> MMX (not sure). So when we do "cast(int) 0.1;" on X86, the 
> backend always generate FPU instructions.

SSE goes back to Pentium III, doesn't it? And the Pentium 4 
supported SSE3, didn't it? Is it an active specification of D to 
run on Pentium II e.g.?