From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
Subject: Re: GNAT 4.8 atomic access to 64-bit objects
Date: Fri, 15 Nov 2013 20:25:28 +0100
Date: 2013-11-15T20:25:27+01:00 [thread overview]
Message-ID: <52867527$0$9504$9b4e6d93@newsspool1.arcor-online.net> (raw)
In-Reply-To: <17hrkmg61tzsa.10xsgmupjcz79$.dlg@40tude.net>
On 15.11.13 09:44, Dmitry A. Kazakov wrote:
> On Thu, 14 Nov 2013 21:34:26 +0100, Ludovic Brenta wrote:
>> I'd suggest you use 64-bit floating-point registers instead; i386
>> processors have them, I think. That has been a useful trick for a
>> decade or so :)
>
> Using unchecked union or unchecked conversion?
FTR, a different 32 bit implementation (Ada 95) does not support a binary
modulus of 64, and also, while Unchecked_Conversion passes the value 42
from an integer register to a FPT register and back as 42, idly trying
type Fake is new Long_Float;
pragma Atomic (Fake);
gives
LRM:C.6(10), Indivisible read/update not supported for given subtype, pragma Atomic ignored
next prev parent reply other threads:[~2013-11-15 19:25 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-14 15:57 GNAT 4.8 atomic access to 64-bit objects Dmitry A. Kazakov
2013-11-14 20:34 ` Ludovic Brenta
2013-11-15 8:44 ` Dmitry A. Kazakov
2013-11-15 19:25 ` Georg Bauhaus [this message]
2013-11-15 21:33 ` Dmitry A. Kazakov
2013-11-16 10:08 ` Georg Bauhaus
2013-11-16 12:02 ` Dmitry A. Kazakov
2013-11-15 19:08 ` Stefan.Lucks
2013-11-15 21:19 ` Dmitry A. Kazakov
2013-11-22 0:30 ` Randy Brukardt
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