https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94743
--- Comment #13 from Christophe Lyon <clyon at gcc dot gnu.org> --- > > Why do we need a library function for that? It would have to be special with > > the stack: push FP registers, but do not restore SP, so that the dual > > restore function can pop them and restore SP. > > Because it's a lot of code to work out how many FP registers there are. You > can't assume that the FPU used to compile the interrupt handler is the same > as that being used at run time. Ha, I had missed that point in your comment #5. I'll re-iterate on my WIP patch. But, in general (non-interrupt) code, what is supposed to happen if you compile for a d32 VFP and run on d16 one ? (and the code uses the extra registers)
