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From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Riley Williams <Riley@Williams.Name>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Interrupt doesn't make it to the 8259 on a ASUS P4PE mobo
Date: 20 Jul 2003 15:25:04 -0700	[thread overview]
Message-ID: <1058739904.3987.2.camel@localhost.localdomain> (raw)
In-Reply-To: <BKEGKPICNAKILKJKMHCAMEJJEPAA.Riley@Williams.Name>

On Sun, 2003-07-20 at 14:04, Riley Williams wrote:
> When I did the "Assembler Language Maths Logic" module for my degree,
> we learned that processors used SRL (Shift Right Logical) to divide
> unsigned numbers by powers of 2, and SRA (Shift Right Arithmetic) to
> divide signed numbers by powers of 2. Can't GCC handle that?

Sure it can, but >>1 isn't the same as /2 for signed numbers.

(Hint: -1 / 2 != -1)

	J


  reply	other threads:[~2003-07-20 22:10 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <m3el0stw23.fsf@averell.firstfloor.org>
2003-07-15 16:14 ` Interrupt doesn't make it to the 8259 on a ASUS P4PE mobo Kathy Frazier
2003-07-15 15:31   ` Richard B. Johnson
2003-07-15 15:58     ` SCSI ATA driver in 2.4.22 ? Jeff Mock
2003-07-15 16:14       ` Jeff Garzik
2003-07-15 17:06   ` Interrupt doesn't make it to the 8259 on a ASUS P4PE mobo Brian Gerst
2003-07-15 17:43     ` Jamie Lokier
2003-07-15 17:59     ` Luciano Miguel Ferreira Rocha
2003-07-15 18:24       ` Brian Gerst
2003-07-15 18:44         ` Alan Cox
2003-07-15 19:44           ` Jamie Lokier
2003-07-20 21:04           ` Riley Williams
2003-07-20 22:25             ` Jeremy Fitzhardinge [this message]
     [not found] <Pine.LNX.4.53.0307141833190.4354@chaos>
2003-07-15 16:52 ` Kathy Frazier
2003-07-14 21:35 Kathy Frazier

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