Test PPOASWDWI

AArch64 PPOASWDWI
"DMB.SYdWW Rfe DpAddrdR PosRR Fri Rfi Fre"
Prefetch=0:x=F,0:y=W,1:y=F,1:x=T
Com=Rf Fr
Orig=DMB.SYdWW Rfe DpAddrdR PosRR Fri Rfi Fre
{
0:X1=x; 0:X3=y;
1:X1=y; 1:X4=x;
}
 P0          | P1                  ;
 MOV W0,#2   | LDR W0,[X1]         ;
 STR W0,[X1] | EOR W2,W0,W0        ;
 DMB SY      | LDR W3,[X4,W2,SXTW] ;
 MOV W2,#1   | LDR W5,[X4]         ;
 STR W2,[X3] | MOV W6,#1           ;
             | STR W6,[X4]         ;
             | LDR W7,[X4]         ;
Observed
    x=1; 1:X7=1; 1:X5=0; 1:X3=2; 1:X0=1;
and x=1; 1:X7=1; 1:X5=0; 1:X3=2; 1:X0=0;