New back end ia16: 16-bit Intel x86

[Andi Kleen]

rridge@csclub.uwaterloo.ca (Ross Ridge) writes:

> Thoses writing embedded applications targeting the 80186
> and those writing low-level 16-bit system code, like boot loaders.
> The later group of people are targetting at least i386 processors, and

Those seem to be already served well enough by ".code16gcc" and the i386
backend. But that hack cannot support real 16bit CPUs.

-Andi