Daniël Mantione schrieb:
Op Fri, 9 May 2008, schreef Florian Klaempfl:
Vincent Snijders schrieb:
Florian Klaempfl schreef:
Miklos Cserzo schrieb:
Hi Folks,
according the documentation "Arrays are limited to 2 GBytes in size
in the default processor mode." Is there another mode allowing
bigger arrays?
64 Bit mode/compiler.
Except for darwin.
Except it doesn't work:
http://www.freepascal.org/testsuite/cgi-bin/testsuite.cgi?action=3&run1id=21737&testfileid=2417
This is operation system dependent also if you can declare static data
structures of this size. Things like
type
ta = array[0..$fffffffff] of byte;
var
p : ^ta;
begin
new(p);
end.
should work e.g. on linux.
Yes, this would work, but wrapping it in a record and adding a field to
it might not work. The reason is that the x86_64 still uses singed
32-bit displacements in its operands.
This is only important for static data which requires relocation. For
heap/stack the compiler simply generates the constants.
To support this, a different code
generation is needed, which we don't have.
Many compilers have an mcmodel switch. FPC's x86_64 code generation
compares to mcmodel=small.
_______________________________________________
fpc-devel maillist - fpc-devel@lists.freepascal.org
http://lists.freepascal.org/mailman/listinfo/fpc-devel
