From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: 64-bit unsigned integer?
Date: Thu, 1 Mar 2018 20:10:23 +0100
Date: 2018-03-01T20:10:23+01:00 [thread overview]
Message-ID: <p79j6u$1qn0$1@gioia.aioe.org> (raw)
In-Reply-To: 628c3bba-6c0d-495b-be2f-e6ed3ef3418f@googlegroups.com
On 2018-03-01 19:15, Dan'l Miller wrote:
> Dmitry A. Kazakov wrote:
>> That replaces unpredictable penalty with a predictably prohibitive one.
>
> Why is it prohibitive?
Because a bounded-length number object will have the worst case length,
always. E.g. 100 x 64-bit words. Each elementary operation will take
1600 bytes from the stack and return 800 bytes back. This is certainly
not for a small embedded/real-time target.
But surely any range must be supported regardless the target hardware.
Why invent a bicycle? Just allow
type Big is range -2**6399..2**6399-1;
No bounded-length numbers ever needed.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2018-03-01 19:10 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-25 12:30 64-bit unsigned integer? MM
2018-02-25 12:41 ` Dmitry A. Kazakov
2018-02-25 12:54 ` MM
2018-02-25 13:23 ` Dmitry A. Kazakov
2018-02-25 13:59 ` MM
2018-02-25 14:20 ` Dmitry A. Kazakov
2018-02-25 15:34 ` MM
2018-02-25 16:35 ` Jeffrey R. Carter
2018-02-25 16:36 ` Anh Vo
2018-02-25 17:31 ` MM
2018-02-26 23:19 ` Randy Brukardt
2018-02-26 23:33 ` MM
2018-02-28 10:17 ` Paul Rubin
2018-02-28 10:39 ` J-P. Rosen
2018-02-28 10:59 ` Dmitry A. Kazakov
2018-02-28 23:20 ` Randy Brukardt
2018-03-01 5:47 ` Paul Rubin
2018-03-01 8:16 ` Niklas Holsti
2018-03-01 8:35 ` Simon Wright
2018-03-01 8:47 ` Dmitry A. Kazakov
2018-03-01 18:15 ` Dan'l Miller
2018-03-01 19:10 ` Dmitry A. Kazakov [this message]
2018-03-01 19:22 ` Dan'l Miller
2018-03-01 19:59 ` Dmitry A. Kazakov
2018-03-01 20:32 ` Dan'l Miller
2018-03-01 21:15 ` Dmitry A. Kazakov
2018-03-01 22:23 ` Randy Brukardt
2018-03-01 23:50 ` Robert Eachus
2018-03-01 20:06 ` Niklas Holsti
2018-03-01 22:04 ` Randy Brukardt
2018-02-26 6:45 ` Robert Eachus
2018-02-27 16:40 ` Dan'l Miller
2018-02-27 17:18 ` J-P. Rosen
2018-02-27 18:17 ` Dan'l Miller
2018-02-28 3:03 ` Robert Eachus
2018-02-28 6:41 ` J-P. Rosen
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