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Re: toolchain/54431: Missing 64-bit atomics on 32-bit platforms
The following reply was made to PR toolchain/54431; it has been noted by GNATS.
From: Jason Thorpe <thorpej%me.com@localhost>
Subject: Re: toolchain/54431: Missing 64-bit atomics on 32-bit platforms
Date: Fri, 2 Aug 2019 07:16:55 -0700
> On Aug 2, 2019, at 5:30 AM, Joerg Sonnenberger <joerg%bec.de@localhost> wrote:
> Any correct implementation will involve a system and hashing of the
> physical address of the access memory for larger-than-pointer access =
> any operation. I'm pretty sure that is going to kill the performance =
> a lot of those users. It doesn't help that there is no way for the =
> to promise that a certain memory address is not shared...
There are other implementations possible, but yah, they could be really =
slow. But maybe slow-but-hey-it-works-at-least is OK?
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