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From: Sergei Sharonov <sergei.sharonov@halliburton.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] Re: Compiler question: integer division?
Date: Mon, 25 Apr 2005 15:13:24 +0000 (UTC)	[thread overview]
Message-ID: <loom.20050425T170912-613@post.gmane.org> (raw)
In-Reply-To: 42692C53.1020305@imc-berlin.de

Hi
> 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?

I believe that would depend on compiler, compiler optimization options and 
processor architecture. AFAIK, gcc will even replace multiplication with 
shift/add/subtract sequences on 486 (that does have multiply opcode) because
it will be faster.

Sergei Sharonov

      parent reply	other threads:[~2005-04-25 15:13 UTC|newest]

Thread overview: 9+ 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
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 ` Sergei Sharonov [this message]

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