GMP: multiple precision arithmetic library, version 6.3.0.

[Ed78z]

Do you have any information about using the GMP library in Lazarus?

It seems it's not implemented well in Lazarus.

[srvaldez]

hello Aqdam1978

I cannot find the gmp units in 3.2.2 64 bit pascal??
but they are in the 32 bit version.

you can compile the gmp unit from source fpcbuild-3.2.2\fpcsrc\packages\gmp\src to 64-bit and then place the files in FPC\3.2.2\units\x86_64-win64\gmp

you will still need the DLL, just download a good MinGW distribution and look for the dll in the bin folder
<edit> have not tried anything related to GMP in Lazarus, works OK in FPC

[Jurassic Pork]

Hello,
what is your O.S ?
For example to use gmp on windows 11  lazarus 64 bits .
1 - Download the file gmp.pas from github free pascal repository : https://github.com/fpc/FPCSource/tree/main/packages/gmp/src
2 - Put the file in your project folder.
3 - Download gmp library for windows. For example from here : https://github.com/gx/gmp/releases/tag/6.1.2-2  (only 6.1.2 version need msvc 2019 redistribuable library)
4 - from gmp-6.1.2-2-msvc2019-x64-Release.zip file extract libgmp-13.dll and rename it gmp.dll. Put it in your project folder or in the windows system32 folder

Example to use gmp in Lazarus :

Code: Pascal  [Select][+][-]

1. implementation
2.  uses  math, gmp;
3. {$R *.lfm}
4. procedure TForm1.GoClick(Sender: TObject);
5. const N = 2;
6.       NBITS = 100;
7. var f: mpfloat;
8.     bits, digits: integer;
9. begin
10.   f_set_default_prec(NBITS);
11.   bits := f_get_default_prec;
12.   digits := floor(bits * LOG_10_2);
13.   f := f_sqrt_ui(N);
14.   Memo1.Append(format('Sqrt(%d) to %d digits (%d bits) = %s', [N, digits, bits, AnsiString(f)]));
15.   f := f ** 2;
16.   Memo1.Append(format('Squared back = %s', [AnsiString(f)]));
17.   f -= N;
18.   Memo1.Append(format('Minus %d = %s', [N, AnsiString(f)]));
19. end;        

   

Friendly, J.P     

[Ed78z]

Thank you,

I have downloaded those files.

My system is Win 11 x64

[Zvoni]

Thank you,

I have downloaded those files.

My system is Win 11 x64

And change your screenname.....

[Ed78z]

Thank you all,

I was able to work with GMP library in Lazarus with your guide,

However, I just noticed there are no any logarithmic or trigonometric functions available in GMP!
It seem there is another library that uses GMP as a base library and also supporting lots of additional functions: MPFR

https://gitlab.inria.fr/mpfr/mpfr

Do you have any knowledge or information about MPFR package in Lazarus?