Cross compiler IA64 -> x86_64 etc?

[Christoph Lameter <christoph@lameter.com>]

Is there any way that the embeddd tool chain can be used to produce 
compilers than run on IA64 that then generate code for x86_64 etc?

We have some requirements here to run x86_64 simulations on an IA64 
because we develop a new x86_64 platform with vastly higher memory 
capacities. We cannot run that natively until the hardware is ready.

So currently we have to move the sources to a x86_64 system to do a 
native compile. It would be great to have a cross compiler for IA64 that 
produces x86_64 code. That way we could compile the kernel on the same 
system where our simulations run.