kit

kit
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atomic_rmw.c (487B)

      1 /* Atomic read-modify-write on a file-scope _Atomic global. The address
      2  * escapes (global), so codegen emits the real exclusive-monitor sequence
      3  * (ldaxr/stlxr loop) plus a barrier, and the final load is ldar — the
      4  * acquire/release/exclusive atomics the disassembler must decode and the
      5  * round-trip re-encode. Exit: 30 + 8 + 4 = 42. */
      6 _Atomic int g = 30;
      7 int test_main(void) {
      8   __atomic_fetch_add(&g, 8, __ATOMIC_SEQ_CST);
      9   return __atomic_load_n(&g, __ATOMIC_SEQ_CST) + 4;
     10 }