…
AArch64 MP+dmb.sy+[fr-rf]-ctrl-ctrl-rfi-pos
"DMB.SYdWW Rfe FrLeave RfBack DpCtrldR DpCtrldW Rfi PosRR Fre"
Cycle=Rfi PosRR Fre DMB.SYdWW Rfe FrLeave RfBack DpCtrldR DpCtrldW
Relax=
Safe=Rfi Rfe Fre PosRR DMB.SYdWW DpCtrldW DpCtrldR [FrLeave,RfBack]
Prefetch=0:x=F,0:y=W,1:y=F,1:x=T
Com=Rf Fr Rf
Orig=DMB.SYdWW Rfe FrLeave RfBack DpCtrldR DpCtrldW Rfi PosRR Fre
{
0:X1=x; 0:X3=y;
1:X1=y; 1:X4=z; 1:X6=x;
2:X1=y;
}
P0 | P1 | P2 ;
MOV W0,#2 | LDR W0,[X1] | MOV W0,#2 ;
STR W0,[X1] | LDR W2,[X1] | STR W0,[X1] ;
DMB SY | CBNZ W2,LC00 | ;
MOV W2,#1 | LC00: | ;
STR W2,[X3] | LDR W3,[X4] | ;
| CBNZ W3,LC01 | ;
| LC01: | ;
| MOV W5,#1 | ;
| STR W5,[X6] | ;
| LDR W7,[X6] | ;
| LDR W8,[X6] | ;
Observed
y=1; x=2; 1:X8=1; 1:X7=2; 1:X2=2; 1:X0=2;
and y=1; x=2; 1:X8=1; 1:X7=1; 1:X2=0; 1:X0=2;
and y=2; x=1; 1:X8=1; 1:X7=1; 1:X2=0; 1:X0=2;
and y=1; x=1; 1:X8=1; 1:X7=1; 1:X2=0; 1:X0=2;
and y=1; x=1; 1:X8=1; 1:X7=1; 1:X2=2; 1:X0=1;
and y=2; x=1; 1:X8=1; 1:X7=1; 1:X2=0; 1:X0=1;
and y=1; x=1; 1:X8=1; 1:X7=1; 1:X2=0; 1:X0=1;