[fpc-devel] Compiler limitations
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? Cheers, miklos ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] Compiler limitations
What about iterators, linked lists ? You can use them some of them. You can also create a temporary file that built in a way that you understand it as an "array". there are many ways to do work around over this issues. I yet found a good reason to have such a big data for array. It's bed practice. you should use either iterators or linked list (while many times iterators are better). Ido On Fri, May 9, 2008 at 11:21 AM, Miklos Cserzo <[EMAIL PROTECTED]> wrote: > > 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? > > Cheers, > > miklos > > ___ > fpc-devel maillist - fpc-devel@lists.freepascal.org > http://lists.freepascal.org/mailman/listinfo/fpc-devel > -- http://ik.homelinux.org/ ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] Compiler limitations
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. Cheers, miklos ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] Compiler limitations
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 Vincent ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] Compiler limitations
On 09 May 2008, at 22:43, Vincent Snijders wrote: 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 Maybe Win64 doesn't support it either. And note that this test (and the darwin remark) about statically allocated arrays. Dynamically allocated arrays don't have such limitations. Jonas ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] Compiler limitations
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..$f] of byte; var p : ^ta; begin new(p); end. should work e.g. on linux. ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] Compiler limitations
Jonas Maebe schreef: On 09 May 2008, at 22:43, Vincent Snijders wrote: Florian Klaempfl schreef: Miklos Cserzo schrieb: Hi Folks, according the documentation "Arrays are limited to 2 GBytes in size in the default processor mode." Is there another mode allowing bigger arrays? 64 Bit mode/compiler. Except for darwin. Except it doesn't work: http://www.freepascal.org/testsuite/cgi-bin/testsuite.cgi?action=3&run1id=21737&testfileid=2417 Maybe Win64 doesn't support it either. Linux either: http://www.freepascal.org/testsuite/cgi-bin/testsuite.cgi?action=3&run1id=21719&testfileid=2417 And note that this test (and the darwin remark) about statically allocated arrays. Dynamically allocated arrays don't have such limitations. Good point. Vincent ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] Compiler limitations
> Vincent Snijders schrieb: > > > > Except it doesn't work: > > http://www.freepascal.org/testsuite/cgi-bin/testsuite.cgi?action=3&run1id=21737&testfileid=2417 > > > > This is operation system dependent also if you can declare static data > structures of this size. Things like > > type >ta = array[0..$f] of byte; > var >p : ^ta; > > begin >new(p); > end. > > should work e.g. on linux. Has sb meanwhile crafted an executable on win64 that actually uses >2GB ? ___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] Compiler limitations
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..$f] of byte; var p : ^ta; begin new(p); end. should work e.g. on linux. Yes, this would work, but wrapping it in a record and adding a field to it might not work. The reason is that the x86_64 still uses singed 32-bit displacements in its operands. To support this, a different code generation is needed, which we don't have. Many compilers have an mcmodel switch. FPC's x86_64 code generation compares to mcmodel=small. Daniël___ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
Re: [fpc-devel] Compiler limitations
Daniël Mantione schrieb: Op Fri, 9 May 2008, schreef Florian Klaempfl: Vincent Snijders schrieb: Florian Klaempfl schreef: Miklos Cserzo schrieb: Hi Folks, according the documentation "Arrays are limited to 2 GBytes in size in the default processor mode." Is there another mode allowing bigger arrays? 64 Bit mode/compiler. Except for darwin. Except it doesn't work: http://www.freepascal.org/testsuite/cgi-bin/testsuite.cgi?action=3&run1id=21737&testfileid=2417 This is operation system dependent also if you can declare static data structures of this size. Things like type ta = array[0..$f] 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
