[GlobalISel] Why GlobalISel does not support big endian ISA?

Hi,

I’ve searched mailing list for this question and couldn’t find helpful information.

My question:

  • Why GlobalISel does not support big endian ISA ?
  • Which part doesn’t support ? IRTranslator ? Legalizer ? Instruction Selector ?
  • Will it support big endian in the future ?
  • How hard the work will be ? Can rookie like me have the chance to contribute and improve ?

Thanks for reading this question ! Have a nice day !

Sheng