C ISA2+pooncerelease+pooncerelease+fencermbonceonce
Hash=aa8a39e6a1f18a911f433ef39bdc2e0c
Cycle=FreOnceOnce PodWWOnceRelease RfeReleaseOnce PodRWOnceRelease RfeReleaseOnce FenceRmbdRROnceOnce
Relax=RfeReleaseOnce
Safe=FenceRmbdRR FreOnceOnce PodWWOnceRelease 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=PodWWOnceRelease RfeReleaseOnce PodRWOnceRelease RfeReleaseOnce FenceRmbdRROnceOnce FreOnceOnce
{}
P0(int* x,int* y) {
WRITE_ONCE(*x,1);
smp_store_release(y,1);
}
P1(int* y,int* z) {
int r0 = READ_ONCE(*y);
smp_store_release(z,1);
}
P2(int* x,int* z) {
int r0 = READ_ONCE(*z);
smp_rmb();
int r1 = READ_ONCE(*x);
}
Observed
2:r1=0; 2:r0=1; 1:r0=1;
C11 equivalent:
C ISA2+pooncerelease+pooncerelease+fencermbonceonce
Hash=aa8a39e6a1f18a911f433ef39bdc2e0c
Cycle=FreOnceOnce PodWWOnceRelease RfeReleaseOnce PodRWOnceRelease RfeReleaseOnce FenceRmbdRROnceOnce
Relax=RfeReleaseOnce
Safe=FenceRmbdRR FreOnceOnce PodWWOnceRelease 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=PodWWOnceRelease RfeReleaseOnce PodRWOnceRelease RfeReleaseOnce FenceRmbdRROnceOnce FreOnceOnce
{}
P0(atomic_int* x,atomic_int* y) {
atomic_store_explicit(x,1,memory_order_relaxed);
atomic_store_explicit(y,1,memory_order_release);
}
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_relaxed);
atomic_thread_fence(memory_order_acq_rel);
int r1 = atomic_load_explicit(x,memory_order_relaxed);
}
exists (1:r0=1 /\ 2:r0=1 /\ 2:r1=0)