Hi Ulrich.
Sorry for the necro - things happen slowly Down Under. :-)
Anyway, I am helping someone with their public domain
project, UDOS - https://github.com/udos-project/udos
(just a hobby, won't be big and professional like Linux)
We got the IPL process in place on ESA/390, and then
I decid
Hi Ulrich.
Below is the output as text.
Thanks. Paul.
make all-recursive
make[1]: Entering directory '/home/robertapengelly/Desktop/UDOS'
Making all in kernel
make[2]: Entering directory '/home/robertapengelly/Desktop/UDOS/kernel'
depbase=`echo irq.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\
s39
Hi Ulrich.
I just checked my copy of s390.md and I don’t see
LA being used for arithmetic.
If your copy of s390.md is using LA for arithmetic
then would it be possible to have an option to
use a normal mathematics instruction instead of
LA?
Do you have any more examples besides LA being
used for
Hi Paul,
"Paul Edwards" 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 w
Hi Paul,
> I just checked my copy of s390.md and I don’t see
> LA being used for arithmetic.
This would be the "*la_31" and "*la_31_and" patterns.
(Note that the addition is implicit in the use of
the "address_operand" constraint.)
> If your copy of s390.md is using LA for arithmetic
> then wo
"Paul Edwards" wrote on 02.09.2021 16:50:35:
> Could you give me an example of an instruction
> generated by –m31 that is not expected to work
> on an AM64 system?
Well, everything related to address computation, of course.
For example, GCC may use LA on -m31 to implement a
31-bit addition, w
>> I just checked my copy of s390.md and I don’t see
>> LA being used for arithmetic.
> This would be the "*la_31" and "*la_31_and" patterns.
Sorry, I did a grep for “LA”, forgetting that
s390.md doesn’t use uppercase instructions.
> (Note that the addition is implicit in the use of
> the "addres
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.
"Paul Edwards" wrote on 02.09.2021 17:26:25:
> > Therefore again my question, what is the actual goal
> > you want to achieve? I'm still not sure I understand
> > that ...
> I would like to know what is required to implement
> “-m32” in the S/390 target. I realize that z/Arch
> doesn’t have a
Hi Ulrich. Thanks for your detailed reply.
>> > Therefore again my question, what is the actual goal
>> > you want to achieve? I'm still not sure I understand
>> > that ...
>> I would like to know what is required to implement
>> “-m32” in the S/390 target. I realize that z/Arch
>> doesn’t have
On Sep 03 2021, Paul Edwards via Gcc wrote:
> The “legacy” environment of z/Linux etc would be 32-bit
> instead of 31-bit. IBM’s reputation will be restored. IBM
> will have the best architecture on the planet. Better than
> x64 because no mode switch is required shifting between
> 32-bit and 64-b
Snapshot gcc-9-20210902 is now available on
https://gcc.gnu.org/pub/gcc/snapshots/9-20210902/
and on various mirrors, see http://gcc.gnu.org/mirrors.html for details.
This snapshot has been generated from the GCC 9 git branch
with the following options: git://gcc.gnu.org/git/gcc.git branch
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