6 void factor_vm::primitive_exit()
8 exit(to_fixnum(dpop()));
11 void factor_vm::primitive_system_micros()
13 box_unsigned_8(system_micros());
16 void factor_vm::primitive_nano_count()
18 box_unsigned_8(nano_count());
21 void factor_vm::primitive_sleep()
23 sleep_micros(to_cell(dpop()));