Adding instructions for ppc

["Pieter-Paul De Clercq" <pieterpaul@xxxxxxxxx>]

Hi,

I need to add new instructions to my gcc-compiler.
I am using a ppc with an extended instruction set to
allow for user defined instructions. This is an option on
the Virtex4 FX from Xilinx.
Which files should I adapt in order to compile my
programs?

Kind Regards,
Pieter-Paul