Am 21.10.19 um 21:42 schrieb J. Gareth Moreton:
On 21/10/2019 20:00, Florian Klämpfl wrote:
What's the problem with
{$push}
{$codealign RECORDMIN=16}
type complex = record
re : real;
im : real;
end;
{$pop}
?
Hi Florian,
I tried that, but that puts each individual field on a 16-byte boundary
Then do:
{$push}
{$codealign RECORDMIN=16}
type dummyrec = record
b : byte;
end;
{$pop}
type complex = record
case byte of
1 : (
re : real;
im : real
);
2 : (alignmentdummy : dummyrec);
end;
I thought I mentioned this trick even somewhere :)
parameters passed into the function may not be aligned (e.g. when
deferencing a pointer on the heap after calling, say, "New(complex);"),
hence why the compiler can only go by the 8-byte aggregate alignment.
No. Data is guaranteed to be aligned at it's natural boundary when it is
passed without further information.
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