Re: LuaJIT and SSE2

[KHMan <keinhong@...>]

Peter Harris wrote:
> On Thu, Jun 17, 2010 at 2:36 PM, Mike Pall wrote:
> > Petri Häkkinen wrote:
> > > So my question is, what are the chances of getting jit to work
> > > on non-SSE2 capable CPUs?
> > Well, not without substantial effort.
>
> [snip]
> Does LuaJIT use much SSE2 that isn't in SSE? I seem to recall SSE2
> added mostly integer operations, and a few cache prefetch type
> instructions, but not so much in the way of floating point
> instructions.

With SSE2, the SSE registers can be used pretty much like a 
regular-looking bunch of floating-point registers. IIRC, that 
could not be done for SSE. SSE2 is a nice minimum target to aim 
for on contemporary x86 machines.

--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia