Executions for behaviour:
"0:R0=0 ; 1:R0=1 ; 1:R1=0 ; 2:R0=1 ; 2:R1=0 ; ok=1 ; x=1 ; y=1"
ARM WRC+ctrlaa+ctrlisbra+A
"RfeAA DpCtrldWAA RfeAR DpCtrlIsbdRRA FreAA"
Cycle=RfeAA DpCtrldWAA RfeAR DpCtrlIsbdRRA FreAA
Prefetch=1:x=F,1:y=W,2:y=F,2:x=T
Com=Rf Rf Fr
Orig=RfeAA DpCtrldWAA RfeAR DpCtrlIsbdRRA FreAA
{ ok=1;
%x0=x; %ok0=ok;
%x1=x; %y1=y; %ok1=ok;
%y2=y; %x2=x; %ok2=ok;
}
P0 | P1 | P2 ;
MOV %T3,#1 | LDREX R0,[%x1] | LDREX R0,[%y2] ;
LDREX R0,[%x0] | STREX %T2,R0,[%x1] | CMP R0,R0 ;
STREX %T2,%T3,[%x0] | CMP %T2,#0 | BNE LC01 ;
CMP %T2,#0 | BNE Fail1 | LC01: ;
BNE Fail0 | CMP R0,R0 | ISB ;
B Exit0 | BNE LC00 | LDREX R1,[%x2] ;
Fail0: | LC00: | STREX %T2,R1,[%x2] ;
MOV R1,#0 | MOV %T3,#1 | CMP %T2,#0 ;
STR R1,[%ok0] | LDREX R1,[%y1] | BNE Fail2 ;
Exit0: | STREX %T2,%T3,[%y1] | B Exit2 ;
| CMP %T2,#0 | Fail2: ;
| BNE Fail1 | MOV R2,#0 ;
| B Exit1 | STR R2,[%ok2] ;
| Fail1: | Exit2: ;
| MOV R2,#0 | ;
| STR R2,[%ok1] | ;
| Exit1: | ;
Observed
0:R0=0; 1:R0=1; 1:R1=0; 2:R0=1; 2:R1=0; ok=1; x=1; y=1;