Test R+dmb.st+rfi-ctrl-pos

AArch64 R+dmb.st+rfi-ctrl-pos
"DMB.STdWW Wse Rfi DpCtrldR PosRR Fre"
Cycle=Rfi DpCtrldR PosRR Fre DMB.STdWW Wse
Relax=
Safe=Rfi Fre Wse PosRR DMB.STdWW DpCtrldR
Prefetch=0:x=F,0:y=W,1:y=F,1:x=T
Com=Ws Fr
Orig=DMB.STdWW Wse Rfi DpCtrldR PosRR Fre
{
0:X1=x; 0:X3=y;
1:X1=y; 1:X4=x;
}
 P0          | P1           ;
 MOV W0,#1   | MOV W0,#2    ;
 STR W0,[X1] | STR W0,[X1]  ;
 DMB ST      | LDR W2,[X1]  ;
 MOV W2,#1   | CBNZ W2,LC00 ;
 STR W2,[X3] | LC00:        ;
             | LDR W3,[X4]  ;
             | LDR W5,[X4]  ;
Observed
    y=2; x=1; 1:X5=0; 1:X3=1; 1:X2=2;
and y=1; x=1; 1:X5=0; 1:X3=1; 1:X2=2;