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: 
 buffer2.nntp.dca1.giganews.com!border2.nntp.dca1.giganews.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!newspeer1.nac.net!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP>
Newsgroups: comp.lang.ada
Subject: Re: Forcing GNAT to use 32-bit load/store instructions on ARM?
Date: Tue, 1 Jul 2014 20:08:42 +0000 (UTC)
Organization: A noiseless patient Spider
Message-ID: <lov4ga$3v9$1@dont-email.me>
References: <0e0b9ac2-e793-4cc5-8d8d-d3441ca28a58@googlegroups.com>
 <1j7b0m3yptffy$.1cztnkty8elrv$.dlg@40tude.net> <lou8e0$7u2$3@dont-email.me>
 <ee4cjxhhe7yi$.kqeq5ati5vrg$.dlg@40tude.net> <loupft$48j$1@dont-email.me>
 <nboccqyjxkzx$.10p3g2l6gzzdd.dlg@40tude.net>
Injection-Date: Tue, 1 Jul 2014 20:08:42 +0000 (UTC)
Injection-Info: mx05.eternal-september.org;
 posting-host="e458ff8b81bc0c159989eb0e36c6e372";
 logging-data="4073"; mail-complaints-to="abuse@eternal-september.org";
 posting-account="U2FsdGVkX1/VGobrJ8NFhXTPPqLPVTOxqCcaq9zW71A="
User-Agent: slrn/0.9.8.1 (VMS/Multinet)
Cancel-Lock: sha1:J96fVshmgAWopcWVJHs0sNYkJCM=
Xref: number.nntp.dca.giganews.com comp.lang.ada:187317
Date: 2014-07-01T20:08:42+00:00
List-Id: <comp.lang.ada>

On 2014-07-01, Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:
> On Tue, 1 Jul 2014 17:00:45 +0000 (UTC), Simon Clubley wrote:
>> If for some reason the compiler could not generate a 32-bit str opcode
>> instead of an 8-bit strb opcode, the pragma Atomic should have caused
>> an error during compilation.
>
> Well, pragmas are permitted to be ignored. Atomic should never be a pragma.
>

I thought that only applied to unrecognised pragmas.

OTOH, going back a couple of versions to the Ada 95 RM (the version
I have to hand and also the pragma only days), C.6(10) makes it clear
that an Atomic pragma is illegal if the implementation cannot support
the indivisible accesses required.

Simon.

-- 
Simon Clubley, clubley@remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980s technology to a 21st century world