...wirklich grosse Integers multiplizieren?

Autor: Mileriam
Homepage: http://www.mediaceta.de

Kategorie: Mathematik

type
  IntNo = record
    Low32, Hi32: DWORD;
  end;

function Multiply(p, q: DWORD): IntNo;
var
  x: IntNo;
begin
  asm
    MOV EAX,[p]
    MUL [q]
    MOV [x.Low32],EAX
    MOV [x.Hi32],EDX
  end;
  Result := x
end;

// Test the above with:
// So kannst du es testen

var
  r: IntNo;
begin
   r := Multiply(40000000, 80000000);
   ShowMessage(IntToStr(r.Hi32) + ', ' + IntToStr(r.low32))
end;

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