Test LB+isync+ctrl

PPC LB+isync+ctrl
"ISyncdRW Rfe DpCtrldW Rfe"
Cycle=Rfe ISyncdRW Rfe DpCtrldW
{
0:r2=x; 0:r4=y;
1:r2=y; 1:r4=x;
}
 P0           | P1           ;
 lwz r1,0(r2) | lwz r1,0(r2) ;
 isync        | cmpw r1,r1   ;
 li r3,1      | beq  LC00    ;
 stw r3,0(r4) | LC00:        ;
              | li r3,1      ;
              | stw r3,0(r4) ;
Observed
    0:r1=1; 1:r1=1;