Ciro Santilli @cirosantilli 37

 Incoming links: Inline assembly

c/inc_loop_asm.c  Updated 2025-06-17  +Created 2025-06-17

This is the only way that we've managed to reliably get a single inc instruction loop, by using inline assembly, e.g. on we do x86:

loop:
  inc %[i];
  cmp %[max], %[i];
  jb loop;

For 1s on P14s Ubuntu 25.04 GCC 14.2 -O0 x86_64 we need about 5 billion:

time ./inc_loop_asm.out 5000000000