Re: [stack] S-K Construction of Dip?
"William Tanksley, Jr" <[email protected]>
| Newsgroups | gmane.comp.lang.concatenative |
|---|---|
| Message-ID | <[email protected]> |
Manfred Von Thun <[email protected]> wrote: > "John Cowan" <[email protected]> wrote: > > Actually, we can do without them. The machine whose sole instruction > > is "subtract 1 from data item D, and if it is now zero, jump to > > instruction J, otherwise continue" is known to be Turing-complete. > > Of course you end up using a lot of them. > So, are we hoping for a single instruction flat concatenative language? Grin. Unfortunately, that's neither single-instruction nor flat. Its instruction stream consists of (data index ,jump offset) pairs, so in effect if both are 8-bit you have 16-bit instructions; that's 64,000 instructions. It's not flat because, again, you can't break apart a valid definition and get as a result two valid definitions. -Billy