AArch64 MP+dmb.sy+ctrl-fri-rfi-[fr-rf]-ctrl
"DMB.SYdWW Rfe DpCtrldR Fri Rfi FrLeave RfBack DpCtrldR Fre"
Cycle=Rfi FrLeave RfBack DpCtrldR Fre DMB.SYdWW Rfe DpCtrldR Fri
Relax=
Safe=Rfi Rfe Fri Fre DMB.SYdWW DpCtrldR [FrLeave,RfBack]
Prefetch=0:x=F,0:y=W,1:y=F,1:x=T
Com=Rf Fr Rf
Orig=DMB.SYdWW Rfe DpCtrldR Fri Rfi FrLeave RfBack DpCtrldR Fre
{
0:X1=x; 0:X3=y;
1:X1=y; 1:X3=z; 1:X8=x;
2:X1=z;
}
P0 | P1 | P2 ;
MOV W0,#1 | LDR W0,[X1] | MOV W0,#2 ;
STR W0,[X1] | CBNZ W0,LC00 | STR W0,[X1] ;
DMB SY | LC00: | ;
MOV W2,#1 | LDR W2,[X3] | ;
STR W2,[X3] | MOV W4,#1 | ;
| STR W4,[X3] | ;
| LDR W5,[X3] | ;
| LDR W6,[X3] | ;
| CBNZ W6,LC01 | ;
| LC01: | ;
| LDR W7,[X8] | ;
Observed
z=2; y=1; x=1; 1:X7=0; 1:X6=2; 1:X5=2; 1:X2=0; 1:X0=1;