From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00
	autolearn=unavailable autolearn_force=no version=3.4.4
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail
From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Compiler doesn't respect 'Size for atomic object
Date: Wed, 20 Dec 2017 21:20:20 +0000
Organization: A noiseless patient Spider
Message-ID: <lypo79f65n.fsf@pushface.org>
References: <lyy3lxfufs.fsf@pushface.org> <p1edbj$flb$1@dont-email.me>
	<lytvwlf8zj.fsf@pushface.org>
Mime-Version: 1.0
Content-Type: text/plain
Injection-Info: reader02.eternal-september.org;
 posting-host="47d826f47b613d695456d8f7d5ba85c7";
	logging-data="3973"; mail-complaints-to="abuse@eternal-september.org";
	posting-account="U2FsdGVkX18/wDTijv+91mj18Jt7VI8IWpQwh2ea2Nw="
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (darwin)
Cancel-Lock: sha1:zKXPDDZdeaQstDczbsIjMF0Le5U=
	sha1:UOTcFKQsT34ufp8IicRZdVXgLqo=
Xref: reader02.eternal-september.org comp.lang.ada:49556
Date: 2017-12-20T21:20:20+00:00
List-Id: <comp.lang.ada>

Simon Wright <simon@pushface.org> writes:

> Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> writes:
>
>> If you use a naturally 32-bit variable instead of your Interrupt_ID
>> data type, does it work ok ?
>
> Yes. My workround is to declare the atomic object as Integer, and
> convert the Interrupt_ID to Integer (the ARM says only that Interrupt_ID
> is discrete, but that's a bridge to cross when we come to it; it's
> naturally an Integer on Cortex-M).

I meant, naturally an integral type. The RM description of the NVIC's
STIR indicates that the IRQ fits in 8 bits; the top 24 bits are reserved
(write as 0).