Test 2+2W+poxxs+SYS2

AArch64 2+2W+poxxs+SYS2
"PodWWXX WseXX PodWWXX WseXX"
Cycle=WseXX PodWWXX WseXX PodWWXX
Relax=WseXX
Safe=PodWW
Prefetch=0:x=F,0:y=W,1:y=F,1:x=W
Com=Ws Ws
Orig=PodWWXX WseXX PodWWXX WseXX
{
0:X0=x; 0:X4=y;
1:X0=y; 1:X4=x;
}
 P0              | P1              ;
 MOV W1,#2       | MOV W1,#2       ;
 LDXR W2,[X0]    | LDXR W2,[X0]    ;
 STXR W3,W1,[X0] | STXR W3,W1,[X0] ;
 MOV W5,#1       | MOV W5,#1       ;
 LDXR W6,[X4]    | LDXR W6,[X4]    ;
 STXR W7,W5,[X4] | STXR W7,W5,[X4] ;
exists
(x=2 /\ y=2 /\ 0:X7=0 /\ 0:X3=0 /\ 0:X2=1 /\ 0:X6=0 /\ 1:X7=0 /\ 1:X3=0 /\ 1:X2=1 /\ 1:X6=0)