From: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
To: Xi Ruoyao <xry111@xry111.site>,
Xi Ruoyao via Gcc-patches <gcc-patches@gcc.gnu.org>,
gcc-patches@gcc.gnu.org
Cc: Jakub Jelinek <jakub@redhat.com>
Subject: Re: [PATCH] libatomic: x86_64: Always try ifunc
Date: Sat, 03 Jun 2023 14:53:23 +0200 [thread overview]
Message-ID: <28780942-1411-4401-8558-A34D002D60BC@gmail.com> (raw)
In-Reply-To: <20230603112532.3264658-1-xry111@xry111.site>
On 3 June 2023 13:25:32 CEST, Xi Ruoyao via Gcc-patches <gcc-patches@gcc.gnu.org> wrote:
>There seems no good way to check if the CPU is Intel or AMD from
>the built-in macros (maybe we can check every known model like __skylake,
>__bdver2, ..., but it will be very error-prune and require an update
>whenever we add the support for a new x86 model). The best thing we can
>do seems "always try ifunc" here.
IIRC there is __builtin_cpu_is (after initialisation) -- A couple of days ago, we wondered if it would be handy to lower that even in fortran without going through C, so i am pretty sure I don't make that up.. ;-)
Just a thought,
next prev parent reply other threads:[~2023-06-03 12:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-03 11:25 Xi Ruoyao
2023-06-03 12:53 ` Bernhard Reutner-Fischer [this message]
2023-06-03 13:46 ` Xi Ruoyao
2023-06-03 14:04 ` Bernhard Reutner-Fischer
2023-06-09 12:37 ` Ping: " Xi Ruoyao
2023-06-09 12:49 ` Jakub Jelinek
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