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Groups > comp.lang.c++ > #81360
| From | "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: DCAS-supplement ? |
| Date | 2021-09-20 16:02 -0700 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <sib3ug$10aj$1@gioia.aioe.org> (permalink) |
| References | (1 earlier) <si8dkm$6cv$1@gioia.aioe.org> <si94nf$vf0$1@dont-email.me> <si95lr$1lsg$1@gioia.aioe.org> <si961b$mhl$1@dont-email.me> <si97l6$j9j$1@dont-email.me> |
On 9/19/2021 10:53 PM, Bonita Montero wrote:
>> I put the compare_exchangE_weak-code into a noinline function:
>>
>> struct uip_pair
>> {
>> uip_pair() = default;
>> uip_pair( uintptr_t first, uintptr_t second ) :
>> first( first ),
>> second( second )
>> {
>> }
>> uintptr_t first, second;
> If I add ...
> uintptr_t i, j, k;
> ... here the structure is still only 8 bytes larger than it
> should be. Maybe MSVC does something like STM on this structure.
>> };
I don't know why they just don't use CMPXCHG16B directly. Look at the
disassembly of:
https://docs.microsoft.com/en-us/windows/win32/api/winnt/nf-winnt-interlockedcompareexchange128
on your system.
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DCAS-supplement ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-19 18:13 +0200
Re: DCAS-supplement ? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-09-19 15:29 -0700
Re: DCAS-supplement ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-20 07:03 +0200
Re: DCAS-supplement ? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-09-19 22:19 -0700
Re: DCAS-supplement ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-20 07:26 +0200
Re: DCAS-supplement ? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-09-19 22:40 -0700
Re: DCAS-supplement ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-20 07:53 +0200
Re: DCAS-supplement ? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-09-20 16:02 -0700
Re: DCAS-supplement ? Bonita Montero <Bonita.Montero@gmail.com> - 2021-09-21 09:31 +0200
Re: DCAS-supplement ? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-09-21 16:09 -0700
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