ARM WWC+dmbana+pora "RfeNaA DMBdRWANa RfeNaR PodRWRA WseANa" Cycle=RfeNaA DMBdRWANa RfeNaR PodRWRA WseANa Prefetch=1:x=F,1:y=W,2:y=F,2:x=W Com=Rf Rf Ws Orig=RfeNaA DMBdRWANa RfeNaR PodRWRA WseANa { ok=1; %x0=x; %x1=x; %y1=y; %ok1=ok; %y2=y; %x2=x; %ok2=ok; } P0 | P1 | P2 ; MOV R0,#2 | LDREX R0,[%x1] | LDREX R0,[%y2] ; STR R0,[%x0] | STREX %T2,R0,[%x1] | MOV %T3,#1 ; | CMP %T2,#0 | LDREX R1,[%x2] ; | BNE Fail1 | STREX %T2,%T3,[%x2] ; | DMB | CMP %T2,#0 ; | MOV R1,#1 | BNE Fail2 ; | STR R1,[%y1] | B Exit2 ; | B Exit1 | Fail2: ; | Fail1: | MOV R2,#0 ; | MOV R2,#0 | STR R2,[%ok2] ; | STR R2,[%ok1] | Exit2: ; | Exit1: | ; Observed 1:R0=1; 2:R0=1; 2:R1=2; ok=1; x=1; and 1:R0=2; 2:R0=1; 2:R1=0; ok=0; x=2; and 1:R0=1; 2:R0=1; 2:R1=0; ok=1; x=2; and 1:R0=2; 2:R0=1; 2:R1=0; ok=1; x=2;