Peter Geoghegan <pg(at)bowt(dot)ie> writes:
> Broad trends have made it easier to write portable C code, but that
> doesn't apply to 32-bit machines, I imagine. Including even the
> extremely low power 32-bit chips that are not yet fully obsolete, like
> the Raspberry Pi Zero's chip.
Meh. To my mind, the most interesting aspects of different hardware
platforms for our purposes are
* alignment sensitivity (particularly, is unaligned access expensive);
* spinlock support, and after that various other atomic instructions;
* endianness
Pointer width is interesting, but really it's a solved problem
compared to these.
regards, tom lane