11 Dec
2012
11 Dec
'12
3:36 p.m.
But I'm not sure if selection of instruction set should not be better done by the compiler at compile time, not at runtime. This should give the best possible performance (at the expense of different .exe versions).
when dealing with `end users' you usually end up providing a binary that `runs everywhere' ... meaning you provide a binary that supports the most widely supported instruction set. for x86 this means no sseX, no cmpxchg8b, for x86_64 it means, no avx ... in these cases, a runtime dispatching is required to get most out of that CPU ... tim