asciilifeform: phf: sadly i've never been there

asciilifeform: ( which is spiffy but imho quite inappropriate in crypto )

asciilifeform: it's really closer to fft multer

asciilifeform: mircea_popescu: aha, but unlike , say, egyptian mult, barrett doesn't have the appeal of simplicity or obvious correctness.

asciilifeform: mircea_popescu: i've been laying it out on paper since he posted. any way i cut it, thus far, it costs moar than the classical .

asciilifeform: ( there is a legit reason why, but i will leave it as exercise for readers )

asciilifeform: but this is problematic and div0 is a fatal eggog in p.

asciilifeform: this is when i point out that div0 gives maxint in ffa ( at least naked ffa, without checking first )

asciilifeform: this carries lulz potential

asciilifeform looked for brandnew one for yrs, finally found

asciilifeform: oh hey speaking of lost technology, my noritake itron is here

asciilifeform: notyet

asciilifeform: ( asciilifeform got a leather-bound 'незнайка на луне' nearly 2wks before the plane , and was in for quite a treat, pictured was stereotypical 'capitalist hell' usa )

asciilifeform: there is a legend that yeltsin swore on a copy instead of bible

asciilifeform: the apotheosis of neznaika series was 'neznaika on the moon', which 'for adults' described moar or less exactly 1990s ruprivatizationlulz

asciilifeform: aha but she's a chix

asciilifeform: herringess!111

asciilifeform: ahahahaha

asciilifeform pictures rsa sliderule...

asciilifeform: aha it's the thing described in mircea_popescu's 'and then newton sat down to write 3 laws...' article

asciilifeform: 'adventures of dunno and his friends'

asciilifeform: ( http://www.arvindguptatoys.com/arvindgupta/mir-nosov-dunno.pdf << yes pdf )

asciilifeform: holy SHIT they translatedit

asciilifeform: ahahahahalolno

asciilifeform: or hm, maybe that brit d00d

asciilifeform: i dun think anybody ever translated'im

asciilifeform: it was ~eliminated in the schools shortly before he landed in usa .

asciilifeform: believe or not, asciilifeform never learned proper latin penmanship.

asciilifeform: ( it is worth remembering that ffa is not built to be a museum piece, 'shortest physically possible rsa', but grudgingly made concessions liek abandoning egyptian mul -- so long as result is still fixedspacetime -- , so that it can actually be fired in anger . )

asciilifeform: the magic of arithmetizing by hand.

asciilifeform: it's how i learned'em

asciilifeform: ( simplest possible mul )

asciilifeform: it's what yer cpu still does internally.

asciilifeform: i threw out egyptian multer very reluctantly, it was so short an' sweet

asciilifeform: for every single subop

asciilifeform: it flows from the fact that we walked 1 bit, rather than ( on my box ) 64 at a time

asciilifeform: not really

asciilifeform: it was about 100x slower than comba ( current basecase ) and ~150x slower than karatsuba+comba ( currently what we use )

asciilifeform: 'egyptian algo'

asciilifeform: that was how my first ffa multer worked

asciilifeform: for i in 1 .. Dividend'Length * Bitness loop ...

asciilifeform: http://wotpaste.cascadianhacker.com/pastes/oVOak/?raw=true << yest's paste for ref

asciilifeform: i.e. shifts by 1

asciilifeform: the fact that it advances a bit at a time ?

asciilifeform: mircea_popescu: you just described our existing divtron aha

asciilifeform: ( if it can be turned into div with remainder... )

asciilifeform: one by jebelean, 'Exact Division with Karatsuba Complexity' , possibly ffaizable.

asciilifeform: believe or not there are several known subquadratic division algos

asciilifeform: ( shave'em if you like )

asciilifeform: 349087340, 753059056

asciilifeform: 3, 5

asciilifeform: ( the egyptian multer, now gone -- did walk the bits, and was directly analogous to the knuthian divider )

asciilifeform: notice that it doesn't walk the bits

asciilifeform: the way the comba multer works

asciilifeform: not whole engine, lol

asciilifeform: maker of cpu will almost unavoidably take an interest in 'ffa-style' arithmetizing.

asciilifeform: outside of perhaps ballooning, continuously-variably-voluminous entities are rare in engineering

asciilifeform: and why almost the entirety of the ~useful~ reading material asciilifeform collected, was from iron makers

asciilifeform: it reflects the reality of what a 'constantspacetime program' really is.

asciilifeform: show the gates.

asciilifeform: that's what it resolves to.

asciilifeform: what's wrong with 'circuit' ?

asciilifeform: ( precisely how to do this, i have not yet determined )

asciilifeform: and this works out

asciilifeform: other observation , gleaned from mircea_popescu and then from knuth -- can modularly ~add~ inside karatsubatron

asciilifeform: it oughta go wordwise.

asciilifeform: right now it is 'egyptian' (knuthian) and goes bitwise

asciilifeform: but i still gotta massage the divider

asciilifeform: as of my last reckoning O(n^3 log n)

asciilifeform: ( typically it is the silent lurkers who read every line of it, oddlyenough )

asciilifeform: http://btcbase.org/log/2017-09-13#1713808 << i did assume that d00d read the current coad ☝︎

asciilifeform: was thinking of the 'omfg it floats in mid air' rather than thermal aspect, there.

asciilifeform: trooo

asciilifeform: but makes a pretty spiffy frying pan handle.

asciilifeform: mircea_popescu: i know that aerogel ain't a maxwell's demon, lol

asciilifeform: ( possible example of the former -- http://btcbase.org/log/2015-01-18#982523 ; of the latter -- aerogels ) ☝︎

asciilifeform: there is imho a marked difference tho b/w 'nobody mass produces this' and 'nobody knows how'

asciilifeform: ( personal comp in 1970s. etc )

asciilifeform: 'want it? gotta do it yerself, corner store won't even dream of it'

asciilifeform: some folx make holographs today, in their cellars, it is i suspect the same attraction. rather like colour film in 1930s ☟︎

asciilifeform: it's really half the attraction of having own decent lab setup

asciilifeform has a coffin notebook little list of items that nobody knows how to produce industrially, and so never expects to touch with own hands

asciilifeform: aerogel'd make a spiffy pedestal for sram pc...

asciilifeform: naah loong ago

asciilifeform: iirc early 1990s ( pre-pantsuitization ) sci-am mag.

asciilifeform: i recall seeing it in print, even

asciilifeform: famous pic

asciilifeform half-expected mircea_popescu to say that he already had owned aerogel dildo.

asciilifeform: and not only could be, but could be attached to the end of a red hot poker , and subject would feel no heat

asciilifeform: could be done

asciilifeform wonders if some modern monarch ever was given an aerogel spoon

asciilifeform: made at the time when the royal aluminum spoon gift etc.

asciilifeform: mircea_popescu: funnily enough there is a monument to this aluminum right here . washington obelisk has a top, 'priceless' pyramid of al

asciilifeform: did we ever do the chronometer thing ? a bit like that there egg, likewise craftsman 'unindustrial' product, and made the british navy briefly +ev

asciilifeform: lathe driven moar by musketry than by fine art tho ☟︎

asciilifeform: i can picture it. and specifically what mircea_popescu meant, re 'craftsmanship' tech as opposed to industrial/scalables

asciilifeform: ( we had the thread, possibly )

asciilifeform: incidentally afaik von kempelen's mechanical voicebox was never replicated even to this day

asciilifeform: i recall the automata, von kempelen et al

asciilifeform: made in 1880s, neh