From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Krzysztof Halasa <khc@pm.waw.pl>
Cc: Timur Tabi <timur@freescale.com>,
Lennart Sorensen <lsorense@csclub.uwaterloo.ca>,
Anton Altaparmakov <aia21@cam.ac.uk>,
Jan Engelhardt <jengelh@computergmbh.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: __LITTLE_ENDIAN vs. __LITTLE_ENDIAN_BITFIELD
Date: Tue, 09 Oct 2007 14:40:54 -0700 [thread overview]
Message-ID: <470BF566.6010204@goop.org> (raw)
In-Reply-To: <m33awkcc2j.fsf@maximus.localdomain>
Krzysztof Halasa wrote:
> Some pointer maybe?
>
Erm, a bit of googling will turn one up, but the gist is that IBM has
traditionally bit 0 for MSB and x for LSB. It's a pain to work with:
for one, bits in the same place in a word (say, control register) are
renumbered in 32 vs 64. And I've worked on at least one piece of
hardware in which the hardware designer had a brain-fart and first board
had bit 0 on the CPU wired to bit 0 on the northbridge - should have
been 31 -> 0, 30 -> 1, etc...
J
next prev parent reply other threads:[~2007-10-09 21:41 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-05 18:27 __LITTLE_ENDIAN vs. __LITTLE_ENDIAN_BITFIELD Timur Tabi
2007-10-05 18:35 ` Jan Engelhardt
2007-10-05 19:35 ` Timur Tabi
2007-10-05 19:43 ` Jan Engelhardt
2007-10-05 19:47 ` Timur Tabi
2007-10-05 20:04 ` Andreas Schwab
2007-10-05 20:07 ` Timur Tabi
2007-10-05 20:34 ` linux-os (Dick Johnson)
2007-10-05 20:37 ` Timur Tabi
2007-10-05 23:27 ` Benjamin Herrenschmidt
2007-10-05 21:17 ` Andreas Schwab
2007-10-05 21:06 ` Anton Altaparmakov
2007-10-05 21:10 ` Timur Tabi
2007-10-05 21:29 ` Andreas Schwab
2007-10-05 21:32 ` Timur Tabi
2007-10-05 23:17 ` Andreas Schwab
2007-10-09 17:46 ` Lennart Sorensen
2007-10-09 17:56 ` Timur Tabi
2007-10-09 18:34 ` Lennart Sorensen
2007-10-09 18:50 ` Krzysztof Halasa
2007-10-09 18:57 ` Timur Tabi
2007-10-09 19:37 ` Krzysztof Halasa
2007-10-09 19:44 ` Timur Tabi
2007-10-09 22:11 ` Krzysztof Halasa
2007-10-09 19:11 ` Jeremy Fitzhardinge
2007-10-09 19:39 ` Krzysztof Halasa
2007-10-09 21:40 ` Jeremy Fitzhardinge [this message]
2007-10-09 22:34 ` Krzysztof Halasa
2007-10-10 12:05 ` linux-os (Dick Johnson)
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