VMX128 AltiVec variant support?

[Gordan Bobic <gordan@xxxxxxxxxx>]

Hi,

Is there any support available or planned (unofficial patch maybe?) for 
the VMX128 vector support?

When I try to compile with -maltivec I get illegal instructions because 
VMX128 is almost-but-not-quite compatible with standard VMX/Altivec. :-(

Presumably, just disabling the use of the offending instructions would 
resolve the problem as an initial fix (possibly enabled with a -mvmx128 
parameter). I wouldn't mind getting involved and making the relevant 
change(s), but I've never looked at GCC source before, so I'd need some 
help/guidance to get started. Can anyone help or point me in the right 
direction?

Thanks.

Gordan