Executions for behaviour:
"0:R0=1 ; 0:R1=0 ; 1:R0=1 ; 1:R1=0 ; ok=1 ; x=2 ; y=1"
ARM S+poaa+ctrlnaa
"PodWWAA RfeANa DpCtrldWNaA WseAA"
Cycle=RfeANa DpCtrldWNaA WseAA PodWWAA
Prefetch=0:x=F,0:y=W,1:y=F,1:x=W
Com=Rf Ws
Orig=PodWWAA RfeANa DpCtrldWNaA WseAA
{ ok=1;
%x0=x; %y0=y; %ok0=ok;
%y1=y; %x1=x; %ok1=ok;
}
P0 | P1 ;
MOV %T3,#2 | LDR R0,[%y1] ;
LDREX R0,[%x0] | CMP R0,R0 ;
STREX %T2,%T3,[%x0] | BNE LC00 ;
CMP %T2,#0 | LC00: ;
BNE Fail0 | MOV %T3,#1 ;
MOV %T3,#1 | LDREX R1,[%x1] ;
LDREX R1,[%y0] | STREX %T2,%T3,[%x1] ;
STREX %T2,%T3,[%y0] | CMP %T2,#0 ;
CMP %T2,#0 | BNE Fail1 ;
BNE Fail0 | B Exit1 ;
B Exit0 | Fail1: ;
Fail0: | MOV R2,#0 ;
MOV R2,#0 | STR R2,[%ok1] ;
STR R2,[%ok0] | Exit1: ;
Exit0: | ;
Observed
0:R0=1; 0:R1=0; 1:R0=1; 1:R1=0; ok=1; x=2; y=1;