So I set up fake registers in target.h, and implement their behaviour with a stack logic? My binutils is already ported, how will this work with GAS not knowing whether i use registers or not?
2017-11-15 16:38 GMT+01:00 Jeff Law <l...@redhat.com>: > On 11/15/2017 08:33 AM, Ábrahám Endre wrote: > > Hi, > > I'm trying to make a gcc backend for a stack machine, is there a way to > > disable register specific behaviour required by target.h, target.c? also > > all preserved names in the RTL language assume usages of operands (addm3 > > mulm3 etc) which is not an option in my target, do I have to manually set > > up new stack-based behaviour in the def? > I suspect the best way to go is to pretend you have a normal register > file up through the register allocator. After register allocation > you'll want to convert to a stacked file. > > GCC already does this for the x87 floating point unit, so you could > probably generalize and build on top of that existing code (reg-stack.c). > > jeff > >
