1C ISA2+poonceonces 2 3(* 4 * Result: Sometimes 5 * 6 * Given a release-acquire chain ordering the first process's store 7 * against the last process's load, is ordering preserved if all of the 8 * smp_store_release() invocations are replaced by WRITE_ONCE() and all 9 * of the smp_load_acquire() invocations are replaced by READ_ONCE()? 10 *) 11 12{} 13 14P0(int *x, int *y) 15{ 16 WRITE_ONCE(*x, 1); 17 WRITE_ONCE(*y, 1); 18} 19 20P1(int *y, int *z) 21{ 22 int r0; 23 24 r0 = READ_ONCE(*y); 25 WRITE_ONCE(*z, 1); 26} 27 28P2(int *x, int *z) 29{ 30 int r0; 31 int r1; 32 33 r0 = READ_ONCE(*z); 34 r1 = READ_ONCE(*x); 35} 36 37exists (1:r0=1 /\ 2:r0=1 /\ 2:r1=0) 38