ARM 2+2W+rfiana-datas
"RfiANa DpDatadW WseNaA RfiANa DpDatadW WseNaA"
Cycle=RfiANa DpDatadW WseNaA RfiANa DpDatadW WseNaA
Prefetch=0:x=F,0:y=W,1:y=F,1:x=W
Com=Ws Ws
Orig=RfiANa DpDatadW WseNaA RfiANa DpDatadW WseNaA
{ ok=1;
%x0=x; %y0=y; %ok0=ok;
%y1=y; %x1=x; %ok1=ok;
}
P0 | P1 ;
MOV %T3,#2 | MOV %T3,#2 ;
LDREX R0,[%x0] | LDREX R0,[%y1] ;
STREX %T2,%T3,[%x0] | STREX %T2,%T3,[%y1] ;
CMP %T2,#0 | CMP %T2,#0 ;
BNE Fail0 | BNE Fail1 ;
LDR R1,[%x0] | LDR R1,[%y1] ;
EOR R2,R1,R1 | EOR R2,R1,R1 ;
ADD R2,R2,#1 | ADD R2,R2,#1 ;
STR R2,[%y0] | STR R2,[%x1] ;
B Exit0 | B Exit1 ;
Fail0: | Fail1: ;
MOV R3,#0 | MOV R3,#0 ;
STR R3,[%ok0] | STR R3,[%ok1] ;
Exit0: | Exit1: ;
Observed
0:R0=1; 0:R1=2; 1:R0=0; 1:R1=1; ok=1; x=2; y=1;
and 0:R0=0; 0:R1=1; 1:R0=1; 1:R1=2; ok=1; x=1; y=2;
and 0:R0=1; 0:R1=2; 1:R0=1; 1:R1=2; ok=1; x=2; y=2;