In   -
Out  -
Type Memory
Ver  1.00b

.code
   STMFD   (sp)!,{r1-r5,link}            ; Stack registers
   EOR r1,r0,r0,LSR #8  ; 00xx??!!
   MOV r1,r1,LSL #24    ; !!000000
   ORR r1,r1,r1,LSR #8  ; !!!!0000
   EOR r0,r0,r1,LSR #16 ; xxxx!!!!
   LDMFD   (sp)!,{r1-r5,pc}              ; Return from call

#Post
A%=&87654321
x%=USR code
P.~x%