From: Jerry Van Baren <gerald.vanbaren@smiths-aerospace.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] Compiler question: integer division?
Date: Fri, 22 Apr 2005 13:10:57 -0400 [thread overview]
Message-ID: <42693021.7090908@smiths-aerospace.com> (raw)
In-Reply-To: <42692C53.1020305@imc-berlin.de>
Steven Scholz wrote:
> Hi there,
>
> I just wondered if the code
>
> return (dtt_read(sensor, DTT_READ_TEMP) / 256);
>
> would be result in a "shift by 8" or and interger division?
>
> Thanks,
>
> Steven
Short answer: Yes.
Longer answer: It depends on the compiler, target processor, and
optimization levels. Usually it will be a "shift by 8" (which may or
may not actually be a shift -- see the PowerPC "Swiss Army Knife[tm]"
instruction rlwimi).
gvb
next prev parent reply other threads:[~2005-04-22 17:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-22 16:54 [U-Boot-Users] Compiler question: integer division? Steven Scholz
2005-04-22 17:10 ` Jerry Van Baren [this message]
2005-04-22 17:17 ` Steven Scholz
2005-04-25 8:27 ` Steven Scholz
2005-04-25 9:04 ` AW: " Reinhard Meyer
2005-04-25 9:35 ` Wolfgang Denk
2005-04-25 10:30 ` Steven Scholz
2005-04-25 14:31 ` Udi Finkelstein
2005-04-25 15:13 ` [U-Boot-Users] " Sergei Sharonov
-- strict thread matches above, loose matches on Subject: below --
2005-04-25 8:35 [U-Boot-Users] " Fillod Stephane
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