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Groups > comp.os.os2.programmer.misc > #1529
| From | Lars Erdmann <lars.erdmann@arcor.de> |
|---|---|
| Newsgroups | comp.os.os2.programmer.misc |
| Subject | Re: CPU Type field in LX header |
| Date | 2016-10-23 12:56 +0200 |
| Organization | solani.org |
| Message-ID | <nui51o$td2$1@solani.org> (permalink) |
| References | <nug59g$g0d$1@dont-email.me> |
I am fairly sure that the linker is supposed to correctly set this field.
But I would not be surprised if any linker ever written for OS/2 just
ignores to properly set this field.
Additionally the LX spec only defines these values for CPU type:
01H - 80286 or upwardly compatible CPU is required to execute this
module.
02H - 80386 or upwardly compatible CPU is required to execute this
module.
03H - 80486 or upwardly compatible CPU is required to execute this
module.
That said, a 16-bit OS/2 linker will likely set this field to 01h
whereas a 32-bit OS/2 linker will set it to 02h just to indicate that a
32-bit CPU is needed as a 16-bit CPU is not enough for OS/2 >= version 2.0.
Anything higher than a 486 is therefore undefined in the standard.
I don't think you can rely on anything set in this field.
Lars
Am 22.10.16 um 18.49 schrieb David Parsons:
> Hello all,
>
> I upgraded a few DLLs used by Firefox & co to i686 standard recently and
> noticed a significant performance improvement so I'm now want to update
> the rest to i686 also. I've been able to do some with the help of ANPM
> (it would be easier if ANPM showed individual file dates & size) but I
> can not find a way to tell what standard a particular file is at.
>
> There is a field in the LX header which specifies the CPU Type but all
> files show i386 even though I believe that many are at i686.
> I've complied a test program here with 'gcc -march=i686 test.c' which
> compiles and runs successfully but it also shows the CPU type as i386.
> Could it be that the -march switch is silently ignored in our gcc builds?
> For the record I used gcc v4.5.2.
>
> I've searched on the internet and read though many pages of switches
> available for gcc but not found anything other than march & mtune.
>
> Does anyone know if there are any other switches I should use or have
> any advice?
>
> Regards,
> Dave P.
Back to comp.os.os2.programmer.misc | Previous | Next — Previous in thread | Next in thread | Find similar
CPU Type field in LX header David Parsons <dwparsons@t-online.de> - 2016-10-22 18:49 +0200
Re: CPU Type field in LX header "Doug Bissett" <dougb007!SPAM@telus.net> - 2016-10-22 17:32 +0000
Re: CPU Type field in LX header David Parsons <dwparsons@t-online.de> - 2016-10-23 18:35 +0200
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-10-24 11:20 +0200
Re: CPU Type field in LX header "Doug Bissett" <dougb007!SPAM@telus.net> - 2016-10-25 16:50 +0000
Re: CPU Type field in LX header David Parsons <dwparsons@t-online.de> - 2016-10-26 17:37 +0200
Re: CPU Type field in LX header "Doug Bissett" <dougb007!SPAM@telus.net> - 2016-10-26 19:15 +0000
Re: CPU Type field in LX header David Parsons <dwparsons@t-online.de> - 2016-10-29 15:41 +0200
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-29 11:43 -0700
Re: CPU Type field in LX header "Steven Levine" <steve53@nomail.earthlink.net> - 2016-11-09 19:36 -0600
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-11-10 08:52 -0800
Re: CPU Type field in LX header "Steven Levine" <steve53@nomail.earthlink.net> - 2016-11-11 10:41 -0600
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-11-11 17:04 -0800
Re: CPU Type field in LX header "Doug Bissett" <dougb007!SPAM@telus.net> - 2016-10-29 22:22 +0000
Re: CPU Type field in LX header David Parsons <dwparsons@t-online.de> - 2016-11-01 17:47 +0100
Re: CPU Type field in LX header "Doug Bissett" <dougb007!SPAM@telus.net> - 2016-11-01 19:18 +0000
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-22 10:48 -0700
Re: CPU Type field in LX header Marcel Mueller <news.5.maazl@spamgourmet.org> - 2016-10-22 21:58 +0200
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-10-22 23:47 +0200
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-22 20:05 -0700
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-10-23 11:08 +0200
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-23 10:33 -0700
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-10-24 12:36 +0200
Re: CPU Type field in LX header Peter Flass <peter_flass@yahoo.com> - 2016-10-25 16:53 -0400
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-10-27 10:49 +0200
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-28 21:14 -0700
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-10-31 14:14 +0100
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-31 07:59 -0700
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-11-01 14:46 +0100
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-28 21:07 -0700
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-22 20:00 -0700
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-10-23 10:46 +0200
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-23 10:58 -0700
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-10-24 13:04 +0200
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-28 21:28 -0700
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-10-31 14:49 +0100
Re: CPU Type field in LX header "A.D. Fundum" <what.ever@neverm.ind> - 2016-10-24 13:24 +0200
Re: CPU Type field in LX header Paul Smedley <paul@smedley.id.au> - 2016-10-23 11:49 +1030
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-22 20:11 -0700
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-23 11:09 -0700
Re: CPU Type field in LX header "Steven Levine" <steve53@nomail.earthlink.net> - 2016-10-26 15:44 -0500
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-28 20:56 -0700
Re: CPU Type field in LX header "Steven Levine" <steve53@nomail.earthlink.net> - 2016-11-09 19:38 -0600
Re: CPU Type field in LX header Paul Smedley <paul@smedley.id.au> - 2016-10-27 19:30 +1030
Re: CPU Type field in LX header Paul Smedley <paul@smedley.id.au> - 2016-10-29 11:39 +1030
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-28 20:54 -0700
Re: CPU Type field in LX header David Parsons <dwparsons@t-online.de> - 2016-10-23 18:45 +0200
Re: CPU Type field in LX header Marcel Mueller <news.5.maazl@spamgourmet.org> - 2016-10-23 19:32 +0200
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-23 11:06 -0700
Re: CPU Type field in LX header "Steven Levine" <steve53@nomail.earthlink.net> - 2016-10-26 13:44 -0500
Re: CPU Type field in LX header David Parsons <dwparsons@t-online.de> - 2016-10-29 14:37 +0200
Re: CPU Type field in LX header Paul Smedley <paul@smedley.id.au> - 2016-10-30 12:13 +1030
Re: CPU Type field in LX header David Parsons <dwparsons@t-online.de> - 2016-10-30 08:57 +0100
Re: CPU Type field in LX header "Steven Levine" <steve53@nomail.earthlink.net> - 2016-11-09 19:54 -0600
Re: CPU Type field in LX header David Parsons <dwparsons@t-online.de> - 2016-11-12 14:48 +0100
Re: CPU Type field in LX header Dave Yeo <dave.r.yeo@gmail.com> - 2016-10-22 11:02 -0700
Re: CPU Type field in LX header Marcel Mueller <news.5.maazl@spamgourmet.org> - 2016-10-22 21:54 +0200
Re: CPU Type field in LX header Lars Erdmann <lars.erdmann@arcor.de> - 2016-10-23 12:56 +0200
Re: CPU Type field in LX header David Parsons <dwparsons@t-online.de> - 2016-10-23 18:20 +0200
Re: CPU Type field in LX header Peter Flass <peter_flass@yahoo.com> - 2016-10-23 15:11 -0400
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