18c2ecf20Sopenharmony_ciC SB+poonceonces 28c2ecf20Sopenharmony_ci 38c2ecf20Sopenharmony_ci(* 48c2ecf20Sopenharmony_ci * Result: Sometimes 58c2ecf20Sopenharmony_ci * 68c2ecf20Sopenharmony_ci * This litmus test demonstrates that at least some ordering is required 78c2ecf20Sopenharmony_ci * to order the store-buffering pattern, where each process writes to the 88c2ecf20Sopenharmony_ci * variable that the preceding process reads. 98c2ecf20Sopenharmony_ci *) 108c2ecf20Sopenharmony_ci 118c2ecf20Sopenharmony_ci{} 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ciP0(int *x, int *y) 148c2ecf20Sopenharmony_ci{ 158c2ecf20Sopenharmony_ci int r0; 168c2ecf20Sopenharmony_ci 178c2ecf20Sopenharmony_ci WRITE_ONCE(*x, 1); 188c2ecf20Sopenharmony_ci r0 = READ_ONCE(*y); 198c2ecf20Sopenharmony_ci} 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_ciP1(int *x, int *y) 228c2ecf20Sopenharmony_ci{ 238c2ecf20Sopenharmony_ci int r0; 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci WRITE_ONCE(*y, 1); 268c2ecf20Sopenharmony_ci r0 = READ_ONCE(*x); 278c2ecf20Sopenharmony_ci} 288c2ecf20Sopenharmony_ci 298c2ecf20Sopenharmony_ciexists (0:r0=0 /\ 1:r0=0) 30