Test RDW

AArch64 RDW
"DMB.SYdWW Rfe DpAddrdR FrLeave RfBack DpAddrdR Fre"
Prefetch=0:x=F,0:y=W,1:y=F,1:x=T
Com=Rf Fr Rf
Orig=DMB.SYdWW Rfe DpAddrdR FrLeave RfBack DpAddrdR Fre
{
0:X1=x; 0:X3=y;
1:X1=y; 1:X4=z; 1:X8=x;
2:X1=z;
}
 P0          | P1                  | P2          ;
 MOV W0,#1   | LDR W0,[X1]         | MOV W0,#1   ;
 STR W0,[X1] | EOR W2,W0,W0        | STR W0,[X1] ;
 DMB SY      | LDR W3,[X4,W2,SXTW] |             ;
 MOV W2,#1   | LDR W5,[X4]         |             ;
 STR W2,[X3] | EOR W6,W5,W5        |             ;
             | LDR W7,[X8,W6,SXTW] |             ;
Observed
    1:X7=1; 1:X5=0; 1:X3=1; 1:X0=1;
and 1:X7=0; 1:X5=0; 1:X3=1; 1:X0=1;
and 1:X7=1; 1:X5=0; 1:X3=1; 1:X0=0;
and 1:X7=0; 1:X5=0; 1:X3=1; 1:X0=0;