From: "Paul Edwards" <mutazilah@gmail.com>
To: "Ulrich Weigand" <Ulrich.Weigand@de.ibm.com>
Cc: <gcc@gcc.gnu.org>, "Ulrich Weigand" <uweigand@de.ibm.com>
Subject: Re: s390 port
Date: Fri, 3 Sep 2021 00:50:35 +1000 [thread overview]
Message-ID: <D005923735BD492F810542A63D95C9BD@DESKTOP0OKG1VA> (raw)
In-Reply-To: <OF0D516E05.04A7959E-ONC1258744.004FD5A3-C1258744.005017BE@ibm.com>
Hi Ulrich.
Thanks a lot for your reply.
Could you give me an example of an instruction
generated by –m31 that is not expected to work
on an AM64 system?
E.g. the 32-bit
LR R2,R3
will definitely work on AM64.
So what specifically won’t work? How many different
things won’t work?
Thanks. Paul.
From: Ulrich Weigand
Sent: Friday, September 3, 2021 12:34 AM
To: Paul Edwards
Cc: gcc@gcc.gnu.org ; Ulrich Weigand
Subject: Re: s390 port
Hi Paul,
"Paul Edwards" <mutazilah@gmail.com> wrote on 02.09.2021 10:15:44:
> We got the IPL process in place on ESA/390, and then
> I decided that the next thing to do would be to switch
> to z/Arch so that we could get rid of the AMODE 31
> architectural limit on 32-bit programs.
>
> It all worked fine, and we were able to use GCC 11 to
> target S/390 and use the -m31 to generate 32-bit code,
> run it under z/Arch as AM64, sort of making it the
> equivalent of AM32. Really it is the equivalent of
> AM-infinity, and there's the rub - GCC 11 is generating
> negative indexes, which cause memory above 4 GiB
> to be accessed (instead of wrapping at 2/4 GiB), which
> of course fails.
Can you elaborate what exactly your goals are? The point
of the -m31 vs. -m64 option is exactly to match the
AMODE 31 vs. AMODE 64 hardware distinction, so trying to
run -m31 code in AMODE 64 is not supposed to work.
Bye,
Ulrich
next prev parent reply other threads:[~2021-09-02 14:50 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-05 12:45 i370 port Paul Edwards
2009-06-05 14:33 ` Joseph S. Myers
2009-06-05 14:57 ` Paul Edwards
2009-06-05 15:03 ` Joseph S. Myers
2009-06-05 15:24 ` Paul Edwards
2009-06-05 15:47 ` Joseph S. Myers
2009-09-11 17:35 ` i370 port - in search of hooks Paul Edwards
2017-03-31 10:34 ` i370 port Paul Edwards
2009-09-12 12:41 ` Paul Edwards
2009-06-05 15:21 ` Ulrich Weigand
2009-06-05 15:39 ` Paul Edwards
2009-06-05 15:49 ` Daniel Jacobowitz
2009-06-05 15:57 ` Paul Edwards
2009-06-05 20:20 ` Joseph S. Myers
2009-06-05 20:45 ` Paul Edwards
2009-06-06 15:00 ` Paul Edwards
2009-06-15 17:46 ` Ulrich Weigand
2009-06-19 0:06 ` Paul Edwards
2009-06-19 12:28 ` Ulrich Weigand
2009-07-18 11:28 ` Paul Edwards
2009-07-20 14:27 ` Ulrich Weigand
2009-08-08 12:04 ` Paul Edwards
2009-08-10 21:25 ` Ulrich Weigand
2009-08-11 0:34 ` Paul Edwards
2009-08-11 15:21 ` Ulrich Weigand
2009-08-12 11:52 ` Paul Edwards
2009-08-12 15:27 ` Paolo Bonzini
2009-08-12 16:35 ` Ulrich Weigand
2009-08-12 17:27 ` Paul Edwards
2009-08-12 17:56 ` Paolo Bonzini
2009-08-12 19:46 ` Ulrich Weigand
2009-08-12 20:31 ` Paul Edwards
2009-08-19 12:07 ` Paul Edwards
2009-08-19 12:27 ` Paolo Bonzini
2009-08-20 12:49 ` Paul Edwards
2009-08-20 22:48 ` Ulrich Weigand
2009-08-21 2:37 ` Paul Edwards
2009-08-21 16:46 ` Ulrich Weigand
2009-06-05 15:44 ` Joseph S. Myers
2009-06-05 15:52 ` Paul Edwards
2009-09-08 15:55 ` Paul Edwards
2009-09-14 15:32 ` Ulrich Weigand
2021-09-02 8:15 ` s390 port Paul Edwards
2021-09-02 14:34 ` Ulrich Weigand
2021-09-02 14:50 ` Paul Edwards [this message]
2021-09-02 14:53 ` Ulrich Weigand
2021-09-02 15:01 ` Paul Edwards
2021-09-02 15:13 ` Ulrich Weigand
2021-09-02 15:26 ` Paul Edwards
2021-09-02 19:46 ` Ulrich Weigand
2021-09-02 20:05 ` Paul Edwards
2021-09-02 20:16 ` Andreas Schwab
2021-09-03 11:18 ` Ulrich Weigand
2021-09-03 11:35 ` Paul Edwards
2021-09-03 12:12 ` Ulrich Weigand
2021-09-03 12:38 ` Paul Edwards
2021-09-03 12:53 ` Jakub Jelinek
2021-09-03 13:12 ` Paul Edwards
2022-12-20 4:27 ` Paul Edwards
2021-09-02 10:56 Paul Edwards
2021-09-06 22:44 Build gcc question Gary Oblock
2021-09-07 7:21 ` s390 port Joe Monk
2021-09-08 3:46 ` Paul Edwards
2021-09-30 0:08 Paul Edwards
2021-09-30 0:59 ` Joe Monk
2021-09-30 21:39 Paul Edwards
2023-01-28 18:51 Paul Edwards
2023-01-29 13:08 ` Joe Monk
2023-01-29 14:30 ` Paul Edwards
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