Executions for behaviour:
"0:R0=1 ; 0:R1=0 ; 1:R0=1 ; 1:R2=0 ; ok=1 ; x=2 ; y=1"
ARM S+poaa+datara "PodWWAA RfeAR DpDatadWRA WseAA" Cycle=RfeAR DpDatadWRA WseAA PodWWAA Prefetch=0:x=F,0:y=W,1:y=F,1:x=W Com=Rf Ws Orig=PodWWAA RfeAR DpDatadWRA WseAA { ok=1; %x0=x; %y0=y; %ok0=ok; %y1=y; %x1=x; %ok1=ok; } P0 | P1 ; MOV %T3,#2 | LDREX R0,[%y1] ; LDREX R0,[%x0] | EOR R1,R0,R0 ; STREX %T2,%T3,[%x0] | ADD R1,R1,#1 ; CMP %T2,#0 | LDREX R2,[%x1] ; BNE Fail0 | STREX %T2,R1,[%x1] ; MOV %T3,#1 | CMP %T2,#0 ; LDREX R1,[%y0] | BNE Fail1 ; STREX %T2,%T3,[%y0] | B Exit1 ; CMP %T2,#0 | Fail1: ; BNE Fail0 | MOV R3,#0 ; B Exit0 | STR R3,[%ok1] ; Fail0: | Exit1: ; MOV R2,#0 | ; STR R2,[%ok0] | ; Exit0: | ; Observed 0:R0=1; 0:R1=0; 1:R0=1; 1:R2=0; ok=1; x=2; y=1;