libc-top-half/musl/arch/wasm32/atomic_arch.h

   1 #ifdef _REENTRANT
   2 #error "multiple threads not supported in musl yet"
   3 #endif
   4
   5 #define a_barrier() (__sync_synchronize())
   6 #define a_cas(p, t, s) (__sync_val_compare_and_swap((p), (t), (s)))
   7 #define a_crash() (__builtin_trap())
   8 #define a_clz_32 __builtin_clz
   9 #define a_clz_64 __builtin_clzll
  10 #define a_ctz_32 __builtin_ctz
  11 #define a_ctz_64 __builtin_ctzll