AArch64 has single-copy 64 bit atomicity

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От Thomas Munro
Тема AArch64 has single-copy 64 bit atomicity
Дата
Msg-id CA+hUKGKyJf7kwYkqDgzTE26Ra1m9nvM=eds2RSSu7WSL-r2wKw@mail.gmail.com
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Ответы Re: AArch64 has single-copy 64 bit atomicity  (Alexander Korotkov <aekorotkov@gmail.com>)
Список pgsql-hackers
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Hi,

Andres mentioned in passing that he'd defined
PG_HAVE_8BYTE_SINGLE_COPY_ATOMICITY only on Itanium, PPC and x86 but
not ARM.

I took a look at https://developer.arm.com/documentation/ddi0487/gb/
under "B2.2.1 Requirements for single-copy atomicity" and it seemed
like we should turn this on for __aarch64__.  It goes back to the
original ARMv8-A so should cover all 64 bit ARM systems.
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