Computed gotos on Reddit

[David Piepgrass]

>> OK I've taken your comments into account.
>> Now I think I finally got it right:
>>
>> mov ecx, [ebx] ; ecx = code[pc]
>> inc ebx ; pc ++
>> jmp ecx ; goto code[pc], as ecx is already a pointer
>
> Nope, ecx is an opcode, not a pointer. You need another 
> indirection.

Man this has been frustrating to read. I understood what Dmitry 
was talking about over at least dozen posts ago, and that's 
without actually reading the article about interpreters (I did 
write a SNES emulator once, but it didn't use this cool 
technique. I did, however, have to write it in assembly because 
the C version was dog-slow because e.g. I couldn't capture the 
overflow/negative/zero flags in C.)