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From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/106895] powerpc64 strange extended inline asm behaviour
 with register pairs
Date: Fri, 09 Sep 2022 11:56:07 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106895

Peter Bergner <bergner at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bergner at gcc dot gnu.org,
                   |                            |meissner at gcc dot gnu.org

--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
Using the type __int128 will give you a register pair, but will not guarant=
ee
an even/odd pair.  The "r" constraint will make sure you have a GPR, but ag=
ain,
doesn't give you an even register.  Looking through our backend, we seem to=
 use
the wQ constraint internally when generating the stq insn.  You could try t=
hat.
Mike, is that the correct thing to use here to get an even/odd GPR pair?=