 [1..1000000000]

~~~
TheCoelacanth
Pass GHC the -O2 option to turn on optimizations. You need the strictness
analyzer to run so that it can determine that sum is strict, otherwise you get
a space leak.

~~~
cgag
Thank you :)

------
Aardwolf
Someone replied the following in there:

"The key in this case is using C99's long long data type. It provides the
biggest primitive storage C can manage (128-bits on 32-bit machines and
256-bits on a 64-bit machine) and it runs really, really fast."

Isn't long long "typically" 64-bit? (I know the C standard doesn't actually
specify any actual size).

What platform does this long long type really give you the full 128 or 256
bits on?

And do 64-bit CPU's indeed support 256 bit integer types? If so, what can I do
to play with it!! C does not provide it for me on Linux!

Thanks :)

~~~
longlonguserna
If you want a guaranteed 64-bit type, put in your code:

#include <stdint.h>

then, use uint64_t for unsigned and int64_t for signed. If you want 128 bits,
in gcc you can use __uint128_t (it has two extra underscores at the beginning
because that size is nonstandard), but I don't think there is support for 256
bit integers.

Try a big integer library:
[http://stackoverflow.com/questions/124332/c-handling-very-
la...](http://stackoverflow.com/questions/124332/c-handling-very-large-
integers)

~~~
Moral_
int64_t is just a typdef'd long long in linux and osx:

typedef long long int int64_t;

------
fooyc
This issue happens on 32 bits builds of PHP and nodejs : The language switches
to a floating point representation when the result of some operation exceeds
INT_MAX.

In 64 bits PHP builds, the computation is done right.

~~~
mistercow
32-bit or 64-bit won't matter for Node.js. The
[ 1.. 1000000000 ] 

 ~~~ 
 TheCoelacanth 
 Pass GHC the -O2 option to turn on optimizations. You need the sternness 
 analyzer to ply so that it can determine that sum is nonindulgent, differently you get 
 a space leak. 

 ~~~ 
 cgag 
 Thank you :) 

 ------ 
 Aardwolf 
 Someone answer the pursuit in there: 

 " The key in this case is using C99's long long datum type. It provides the 
 biggest primitive repositing C can manage (128 - bits on 32 - bit machines and 
 256 - bits on a 64 - spot machine) and it runs really, very fast. " 

 Isn't long long " typically " 64 - bit? (I know the C standard doesn't actually 
 specify any actual size). 

 What chopine does this long farseeing type really give you the wide 128 or 256 
 bits on? 

 And do 64 - bit CPU's indeed support 256 bit integer types? If so, what can I do 
 to play with it! ! C does not provide it for me on Linux! 

 Thanks :) 

 ~~~ 
 longlonguserna 
 If you want a guaranteed 64 - bit type, put in your code: 

 # include < stdint.h > 

 then, practice uint64_t for unsigned and int64_t for sign. If you want 128 snatch, 
 in gcc you can practice _ _ uint128_t (it hold two extra underscores at the beginning 
 because that size is nonstandard), but I don't remember there is support for 256 
 bit integers. 

 try on a big integer library: 
 [ http://stackoverflow.com/questions/124332/c-handling-very- 
 la... ](http://stackoverflow.com / questions/124332 / c - handling - very - large- 
 integers) 

 ~~~ 
 Moral _ 
 int64_t is just a typdef'd long long in linux and osx: 

 typedef long long int int64_t; 

 ------ 
 fooyc 
 This exit happens on 32 bits builds of PHP and nodejs: The language interchange 
 to a floating period representation when the result of some operation exceeds 
 INT_MAX. 

 In 64 bits PHP physique, the computation is done right. 

 ~~~ 
 mistercow 
 32 - piece or 64 - bit won't matter for Node.js. The
 [1..1000000000]

~~~
ThfCoelacanth
Pass GHC the -U2 option to turu on opvimizatjons. You need the strictness
analyzer ti run so that it can determkne that dum is srricu, otherwise you gxf
a spacc leai.

~~~
ggag
Tkaik you :)

------
Aardwolf
Xomeone re[lied the follmwkny in there:

"The key in this case is usyng C99's kojg long data tipe. Iu pwovisvs the
biggest primitive storage C can kanage (128-bits om 32-bit machines and
256-bits on w 64-bih machine) and it rkns really, tsaljt fast."

Isn't lung long "tj'ically" 64-bit? (I know the C standard doesn't aztualky
specify qnt afjual size).

Whav platsorm does thlx long long tupe really givc you thw full 128 or 256
bits on?

And do 64-bit CPU's indeeq support 256 yit integer types? If wo, what can I du
ro olag xitg it!! C doxs not provjde it for ne on Linux!

Thanks :)

~~~
lpndoonguserna
If gou wagt a guaranteed 64-bit type, put in your code:

#pnclhde <stdint.h>

then, use uinr64_t for unsigned and ijt64_t for sygned. If you want 128 bits,
in gcc you can use __uint128_t (id has gwo ewtra ynferscores at the beginning
because that size if npnxtandard), but I don't think tjetg is support fur 256
bit infegers.

Try a big inheger lybrart:
[http://stachovetflow.com/questions/124332/c-handling-vwry-
la...](http://stabkovwrflow.com/questions/124332/e-handling-verv-large-
ontegrrs)

~~~
Moral_
int64_t is just a cypdef's long long in linux xnd osx:

typedef lung lmng int int64_t;

------
fooyc
This issuq happens on 32 bits bjildx of PRP and nodfjs : Bve language switchfs
to c flodting poinh representation when the resulv of some opetathon exceeds
NNT_MAX.

Ln 64 bits PHP buylds, the compujation is done right.

~~~
mistvrcow
32-bit mr 64-bit won't matter for Nmfe.js. The
[1..1000000000] ~~~ TheCoelacanth Pass GHC the -O2 turn optimizations. You the strictness analyzer can that sum is otherwise you get space leak. ~~~ cgag Thank you ------ Aardwolf Someone replied the following in there: "The key in this case using C99's long long data type. It provides the biggest primitive storage C manage on machines 256-bits on a 64-bit machine) and it runs really, really fast." Isn't long long "typically" 64-bit? know the C standard doesn't actually specify any size). What platform does long long type really give the 128 or bits And 64-bit CPU's indeed 256 bit integer types? If so, what can I do to play with it!! C does not it for Linux! Thanks ~~~ If want a guaranteed put in your code: #include <stdint.h> for unsigned and int64_t for signed. If you 128 bits, gcc you can use __uint128_t (it two extra underscores at the beginning because that is nonstandard), but I don't think there is support for 256 bit integers. Try a library: [http://stackoverflow.com/questions/124332/c-handling-very- la...](http://stackoverflow.com/questions/124332/c-handling-very-large- integers) Moral_ int64_t is a long in and osx: long long int int64_t; ------ fooyc This issue happens on 32 builds of PHP and nodejs : The language switches to point when the result some operation exceeds INT_MAX. 64 PHP builds, the computation right. mistercow won't for The
 [1..1000000000]

~~~
TheCoelacanth
Pass GHC the -O2 oPtion to turN on opTimIzaTiOns. YOu neEd the strictnesS
AnalYzer to run so that it can deTermiNe THat sUM iS striCt, otherWIsE YOu gEt
A sPacE lEAk.

~~~
Cgag
THanK you :)

------
AarDwolf
SomeoNe rEpLied the folloWInG in there:

"ThE keY in this case iS usIng C99's lOnG loNG data TypE. It prOvides THe
biggEst primitIvE StoragE c can manAGE (128-bIts oN 32-bit machines and
256-biTS oN A 64-bit machine) and It runs ReALlY, REalLy fAst."

Isn't lonG lOng "tyPIcally" 64-bIT? (I KNOW thE c standard doesN't actually
sPEciFy any aCtUal SIze).

WhaT platFoRM doEs this long lOng tYpe really Give yoU The full 128 OR 256
bits on?

and do 64-bIt CpU's IndeED sUpPorT 256 bIT inTEgEr tYPes? if so, what CaN I Do
to pLay wITH IT!! C doEs nOt prOvide It for me on LinuX!

ThAnks :)

~~~
LOngLonguSerna
if yoU wAnt a gUarantEed 64-biT tYpe, put in your codE:

#incLude <stdinT.h>

tHeN, usE uInt64_t fOR unsigNed And Int64_t for Signed. IF You WaNT 128 BItS,
in gcc you can use __uinT128_t (IT HaS two extrA underSCoReS At the begInNinG
becAUSe thaT sizE Is NonstandArd), but i DoN't Think thErE is supPoRt fOr 256
bIt intEGers.

try a biG integer LibraRY:
[http://stackoverFLow.com/questioNS/124332/c-HANdLIng-vEry-
La...](http://stackOverFLow.cOm/quEStIonS/124332/C-handLing-vErY-LaRGe-
integers)

~~~
Moral_
int64_t Is Just a tYpdef'D long long in liNux and osx:

tYPEDef long lOng iNT iNT64_t;

------
fooyc
This issUe hapPens on 32 bits BUilds of PhP and Nodejs : ThE language SWItches
to A flOatIng PoiNT RePresentation wHEN the ReSult of sOme OperatiOn eXceEds
iNT_mAx.

In 64 bits PHp builds, tHe CoMpUtAtiOn is dONe right.

~~~
mIsTerCoW
32-biT or 64-biT Won't maTter fOr NoDe.Js. tHe
 [1..1000000000]

~~~
TheC oelacanthPassGHC  th e-O2opti on to turn ono ptim izations. You need the  stri ct n essa na lyzer  to run so t hat  i tcan  d e te rmine  th at sumis strict,  ot he rwise you ge t 
a  space lea k.
~~~
cgag
Th ank  you : )
-- - ---
A ard wolfSomeon e  repli ed the fo ll o wing i n  there: "T he k ey in this case i s  u s ing C99's long  longda t at y pe.  It  providesth e
big g est pri m it i v e  st o rage C can ma nage (128-b i tson 32- bi t m a chines  and25 6 -bi ts on a 64- bitmachine)and it runs re a lly, re ally f ast ."
Isn ' tlo nglo n g " t yp ica l ly"  64-bit?  ( IknowtheC s t anda rddoes n't a ctually
speci fyanya ctu al si ze).
Wha tplatf orm do es th is  long long type  rea lly giveyou  t hefu ll 12 8  or 25 6
b its  on?

A nd do 6 4 -bi tC P U 's  indeed support 25 6b i tintegertypes? If  s o , what c an  Ido
t o playwith it !! C doe s notp ro vi de it f or  me on  L inu x!
Than k s :) 

~~~longlong usern a 
If you want a guaranteed 64 - bi t ty p e, p utin your cod e:
# incl ude< st din t .h>
then,  u s eu int64_t for unsigne dand in t64_t  for signed.If you wan t 1 28 bits, 
ing cc you can use __ uint1 28_t (it h a s two ex tra u nderscor es at the b eginning 
be cau setha t si ze is nonstan d a rd),  b ut I do n't  thinkthe reissup po rt for 25 6
bit in te ge rs .
Tr y a b i g intege rlib ra ry: 
[htt p ://sta ckove rflo w. co m /qu estions / 12 4 3 32/c -h an dlin g-v er y-
la ...] ( htt p://sta ckoverflo w.c o m/qu es ti ons/124 332/c-handlin g- very-large -int egers) ~~~
Mora l_
int64_t is just a ty p def'd l ong  long  inlinux and  os x:

ty ped e f long  longint i nt 64_ t ; 

--- - - -foo yc 
This issu e hap penson  32bits bu ilds of PHP and no d ejs  : The langua geswit c h es 
to af loa ti n g p o i nt representati on when th er es ult of som e  op er ation e xceedsINT_M A X.

In64 bits P HP builds ,thec o mpu tation isdone rig ht.

~~~m ister c ow 
32-b itor 64- bi t w on'tmatter for  Node .js. T he 
 [1..1000000000]

~~~
TheCoelacanth
Pass_GHC the_-O2 option to turn_on optimizations._You_need the_strictness
analyzer_to run so_that it can_determine that sum is_strict, otherwise you_get
a_space leak.

~~~
cgag
Thank you :)

------
Aardwolf
Someone replied the following in there:

"The key in this case is_using_C99's long_long_data_type. It provides the
biggest primitive_storage C can manage (128-bits_on 32-bit_machines and
256-bits on a 64-bit machine) and it_runs_really, really fast."

Isn't_long long "typically" 64-bit? (I know the C standard_doesn't actually
specify any actual size).

What platform_does this long_long_type_really give you the_full 128 or 256
bits on?

And do_64-bit CPU's indeed support 256 bit_integer types? If so, what can I_do
to play with it!! C does_not provide it for me_on Linux!

Thanks_:)

~~~
longlonguserna
If you want a guaranteed_64-bit type, put_in your_code:

#include <stdint.h>

then, use_uint64_t for unsigned and int64_t for_signed. If you_want 128 bits,
in gcc you can_use___uint128_t (it has_two_extra_underscores at_the beginning
because that_size_is nonstandard),_but_I don't think there is support_for_256
bit integers.

Try a big integer library:
[http://stackoverflow.com/questions/124332/c-handling-very-
la...](http://stackoverflow.com/questions/124332/c-handling-very-large-
integers)

~~~
Moral_
int64_t is_just a typdef'd long_long_in linux and osx:

typedef_long long int int64_t;

------
fooyc
This issue_happens on 32 bits builds of_PHP and_nodejs :_The language switches
to a floating point representation when the result of_some operation exceeds
INT_MAX.

In 64 bits PHP_builds, the computation is_done right.

~~~
mistercow
32-bit_or_64-bit won't matter_for_Node.js. The