C ISA2+fencembreleaseonce+pooncerelease+poacquireacquire
Hash=484f352e1f0eec859134fe54c9c2d044
Cycle=PodRRAcquireAcquire FreAcquireRelease FenceMbdWWReleaseOnce RfeOnceOnce PodRWOnceRelease RfeReleaseAcquire
Relax=FreAcquireRelease RfeReleaseAcquire
Safe=FenceMbdWW PodRRAcquireAcquire RfeOnceOnce PodRWOnceRelease
Generator=diy7 (version 7.46+3)
Prefetch=0:x=F,0:y=W,1:y=F,1:z=W,2:z=F,2:x=T
Com=Rf Rf Fr
Orig=FenceMbdWWReleaseOnce RfeOnceOnce PodRWOnceRelease RfeReleaseAcquire PodRRAcquireAcquire FreAcquireRelease
{}
P0(int* x,int* y) {
smp_store_release(x,1);
smp_mb();
WRITE_ONCE(*y,1);
}
P1(int* y,int* z) {
int r0 = READ_ONCE(*y);
smp_store_release(z,1);
}
P2(int* x,int* z) {
int r0 = smp_load_acquire(z);
int r1 = smp_load_acquire(x);
}
Observed
2:r1=0; 2:r0=1; 1:r0=1;
C11 equivalent:
C ISA2+fencembreleaseonce+pooncerelease+poacquireacquire
Hash=484f352e1f0eec859134fe54c9c2d044
Cycle=PodRRAcquireAcquire FreAcquireRelease FenceMbdWWReleaseOnce RfeOnceOnce PodRWOnceRelease RfeReleaseAcquire
Relax=FreAcquireRelease RfeReleaseAcquire
Safe=FenceMbdWW PodRRAcquireAcquire RfeOnceOnce PodRWOnceRelease
Generator=diy7 (version 7.46+3)
Prefetch=0:x=F,0:y=W,1:y=F,1:z=W,2:z=F,2:x=T
Com=Rf Rf Fr
Orig=FenceMbdWWReleaseOnce RfeOnceOnce PodRWOnceRelease RfeReleaseAcquire PodRRAcquireAcquire FreAcquireRelease
{}
P0(atomic_int* x,atomic_int* y) {
atomic_store_explicit(x,1,memory_order_release);
atomic_thread_fence(memory_order_seq_cst);
atomic_store_explicit(y,1,memory_order_relaxed);
}
P1(atomic_int* y,atomic_int* z) {
int r0 = atomic_load_explicit(y,memory_order_relaxed);
atomic_store_explicit(z,1,memory_order_release);
}
P2(atomic_int* x,atomic_int* z) {
int r0 = atomic_load_explicit(z,memory_order_acquire);
int r1 = atomic_load_explicit(x,memory_order_acquire);
}
exists (1:r0=1 /\ 2:r0=1 /\ 2:r1=0)