Test SB+popxs+SYS2

AArch64 SB+popxs+SYS2
"PodWRPX FreXP PodWRPX FreXP"
Cycle=PodWRPX FreXP PodWRPX FreXP
Relax=FreXP
Safe=PodWR
Prefetch=0:x=F,0:y=T,1:y=F,1:x=T
Com=Fr Fr
Orig=PodWRPX FreXP PodWRPX FreXP
{
0:X1=x; 0:X2=y;
1:X1=y; 1:X2=x;
}
 P0              | P1              ;
 MOV W0,#1       | MOV W0,#1       ;
 STR W0,[X1]     | STR W0,[X1]     ;
 LDXR W3,[X2]    | LDXR W3,[X2]    ;
 STXR W4,W3,[X2] | STXR W4,W3,[X2] ;
exists
(x=1 /\ y=1 /\ 0:X4=0 /\ 0:X3=0 /\ 1:X4=0 /\ 1:X3=0)