3 ms·

int80h.org Anyway, the original question was _why_ does Linux use registers to pass arguments. Arguments can be passed on the stack, but Linux chose to use re

• icebraining 12y ago
  It's because in theory, it's faster to copy the values to registers than to have to push them all to the stack and then have the callee pop them. At least that was the thought behind Microsoft's __fastcall, which was their original version of a calling convention using registers, though in that case it seems the benchmarks aren't conclusively in support of the theory.