Re: toolchain/54431: Missing 64-bit atomics on 32-bit platforms

[Jason Thorpe <thorpej%me.com@localhost>]

The following reply was made to PR toolchain/54431; it has been noted by GNATS.

From: Jason Thorpe <thorpej%me.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: toolchain-manager%netbsd.org@localhost,
 gnats-admin%netbsd.org@localhost,
 netbsd-bugs%netbsd.org@localhost,
 "he%netbsd.org@localhost" <he%NetBSD.org@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:
 >=20
 > Any correct implementation will involve a system and hashing of the
 > physical address of the access memory for larger-than-pointer access =
 for
 > any operation. I'm pretty sure that is going to kill the performance =
 of
 > a lot of those users. It doesn't help that there is no way for the =
 user
 > 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?
 
 -- thorpej