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Lazarus inline assembler

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This is a stub to encourage others to contribute further. Here is a very simple example to get started:

pascal
unit unt_asm;
{$mode objfpc}{$H+}
interface
uses
  Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, StdCtrls;
type
  { TForm1 }
  TForm1 = class(TForm)
    btnGo: TButton;
    edtInput: TEdit;
    edtOutput: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    procedure btnGoClick(Sender: TObject);
  private
    { private declarations }
  public
    { public declarations }
  end; 
var
  Form1: TForm1; 
implementation
{ TForm1 }

procedure TForm1.btnGoClick(Sender: TObject);
var
  num, answer : integer;
begin
  num := StrToInt(edtInput.Text);
  //This is required with Lazarus on x86:
  {$ASMMODE intel}
  asm//add binary 110//subtract decimal 2
    MOV EAX, num
    ADD EAX, 110B //add binary 110
    SUB EAX, 2    //subtract decimal 2
    MOV answer, EAX
  END;
  edtOutput.Text := IntToStr(answer);
end;

initialization
  {$I unt_asm.lrs}
end.

From the Free Pascal wiki, page "Lazarus inline assembler", as it stood on 2020-02-18 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's Licensing page. If you have concerns about this material, message the admin.

Revision 12, last changed by WikiArchive .