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List:       gcc
Subject:    Re: intrinsic function for the assembly x86 xchg command
From:       Martin_Liška <mliska () suse ! cz>
Date:       2017-04-19 8:51:05
Message-ID: 3aa0b672-bc10-5b59-a5d9-8f67e9582be6 () suse ! cz
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On 04/07/2017 08:10 PM, Yichao Yu wrote:
> On Fri, Apr 7, 2017 at 2:08 PM, fab10 <0xfab10@gmail.com> wrote:
>> It would be usefull to develop in gcc an intrinsic function for the assembly
>> x86 instruction xchg to implement a low level mutex.
>
> I believe that's what atomic_exchange is lowered to on x86?
>

Yes.

You can take a look here:
https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html

Martin
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