Test S+poxp+popx+SYS2

AArch64 S+poxp+popx+SYS2
"PodWWXP Rfe PodRWPX WseXX"
Cycle=Rfe PodRWPX WseXX PodWWXP
Relax=WseXX
Safe=Rfe PodWW PodRW
Prefetch=0:x=F,0:y=W,1:y=F,1:x=W
Com=Rf Ws
Orig=PodWWXP Rfe PodRWPX WseXX
{
0:X0=x; 0:X5=y;
1:X1=y; 1:X2=x;
}
 P0              | P1              ;
 MOV W1,#2       | LDR W0,[X1]     ;
 LDXR W2,[X0]    | MOV W3,#1       ;
 STXR W3,W1,[X0] | LDXR W4,[X2]    ;
 MOV W4,#1       | STXR W5,W3,[X2] ;
 STR W4,[X5]     |                 ;
Observed
    x=1; 1:X5=0; 1:X4=0; 1:X0=1; 0:X3=1; 0:X2=1;