tests/swap-lispobjs.c

   1 #include "arch.h"
   2 #include "genesis/config.h"
   3 #include "genesis/constants.h"
   4 #include "runtime.h"
   5 #include "target-arch.h"
   6
   7 #if defined(LISP_FEATURE_X86) || defined (LISP_FEATURE_X86_64)
   8
   9 int
  10 try_to_zero_with_swap_lispobjs(volatile lispobj *word)
  11 {
  12     /* GCC with high enough optimization settings optimizes away the
  13      * whole assembly if it is not marked as volatile. */
  14     swap_lispobjs(word,0);
  15     if (*word==0) {
  16         return 0;
  17     } else {
  18         return 1;
  19     }
  20 }
  21
  22 #endif