o                 308 src/exec.c         unsigned long o = 0;
o                 311 src/exec.c         o = sys->cpu->gr[r];
o                 315 src/exec.c             s = o + val;
o                 320 src/exec.c             if(o < val) {
o                 323 src/exec.c             s = o + (~val + 1);