<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br><div><div>On Sep 11, 2014, at 9:10 PM, Reid Kleckner <<a href="mailto:rnk@google.com">rnk@google.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Sep 11, 2014 at 5:17 PM, bagel <span dir="ltr"><<a href="mailto:bagel99@gmail.com" target="_blank">bagel99@gmail.com</a>></span> wrote:<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
The phrase "As long as loading an i8 is legal" is the whole point. What if it isn't? How do I specify that (should of specifying the load as volatile, which is overkill)? As an author of a front end, I want to know what the contract is when I say load 32-bits? When I say load 32-bits I mean load 32-bits.<br>
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I think it's a bug because there is no good way do avoid it and it breaks device drivers.</blockquote><div><br></div><div>This sounds like the *exact* use case for volatile, where the load is observable in some way other than the result that it is used for. If i8 is a legal type for the rest of your ISA, then this should be a volatile load. </div></div></div></div>
</blockquote></div><div><br></div><div>I agree with Reid.</div><div>You should use volatile. Loading a i8 is legal in the ISA.</div><div><br></div><div>-Quentin</div></body></html>