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Assembling in Delphi 3.0

Posted on 1998-06-19
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Medium Priority
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Last Modified: 2010-04-04
Hi,

Does any one know how to use PUSH instruction built-in Delphi 3.0 to push a double data type (64bit) to the stack whose resgister is only 32bit?

Thanks.
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Question by:NYang
3 Comments
 
LVL 3

Expert Comment

by:rickpet
ID: 1354150
If your not worried about losing the high bits you can type it to a pointer...

var
  myComp: comp

.

  pointer(myComp);
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LVL 3

Accepted Solution

by:
vladika earned 40 total points
ID: 1354151
Let exists such code

procedure Test(T: Double);
begin
end;

procedure Push1;
var T: Double;
begin
  T := 1;
  Test(T);
end;

It's equivalent
procedure Push2;
var T: Double;
begin
  T := 1;
  asm
    push dword ptr T.4
    push dword ptr T
    call Test
  end;
end;

So, use PUSH instruction 2 times

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Author Comment

by:NYang
ID: 1354152
Many thanks to vladika for solving my problem.

NYang
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