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From: "fw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80878] -mcx16 (enable 128 bit CAS) on x86_64 seems not to work on 7.1.0
Date: Sat, 18 Apr 2020 17:23:50 +0000 [thread overview]
Message-ID: <bug-80878-4-gsOyUld9ns@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-80878-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80878
--- Comment #21 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to Avi Kivity from comment #20)
> Note that clang generates cmpxchg16b when the conditions are ripe:
>
> https://godbolt.org/z/j9Whgh
I believe this is a different, C++-specific issue. The C front end already
emits cmpxchgq in this situation.
next prev parent reply other threads:[~2020-04-18 17:23 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-80878-4@http.gcc.gnu.org/bugzilla/>
2020-04-18 17:14 ` avi@cloudius-systems.com
2020-04-18 17:23 ` fw at gcc dot gnu.org [this message]
2020-04-18 17:31 ` avi@cloudius-systems.com
2020-04-18 17:40 ` fw at gcc dot gnu.org
2020-04-18 18:13 ` avi@cloudius-systems.com
2020-04-18 18:18 ` avi@cloudius-systems.com
2020-04-18 18:41 ` fw at gcc dot gnu.org
2021-03-14 3:21 ` wuyongwei at gmail dot com
2021-03-14 3:46 ` wuyongwei at gmail dot com
2021-03-16 16:02 ` wuyongwei at gmail dot com
2021-05-06 17:50 ` s_gccbugzilla at nedprod dot com
2021-05-06 19:32 ` pinskia at gcc dot gnu.org
2021-05-06 20:53 ` liblfds_gccbz at winterflaw dot net
2021-05-07 12:27 ` s_gccbugzilla at nedprod dot com
2021-05-07 14:07 ` redi at gcc dot gnu.org
2021-05-07 14:44 ` s_gccbugzilla at nedprod dot com
2022-11-03 9:55 ` lh_mouse at 126 dot com
2022-11-03 10:04 ` jakub at gcc dot gnu.org
2022-11-03 10:32 ` fw at gcc dot gnu.org
2022-11-03 11:16 ` admin_public at liblfds dot org
2023-11-16 1:33 ` lh_mouse at 126 dot com
2023-12-10 9:54 ` lh_mouse at 126 dot com
2023-12-10 10:32 ` admin_public at liblfds dot org
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