Re: Linux/IA-64 byte order

Richard Gooch (rgooch@atnf.csiro.au)
Tue, 9 Mar 1999 12:06:42 +1100


Linus Torvalds writes:
> In article <199903090013.LAA21453@vindaloo.atnf.CSIRO.AU>,
> Richard Gooch <rgooch@atnf.csiro.au> wrote:
> > Hi, all. I've been discussing the byte order that Linux/IA-64 will
> >have with David Mosberger from HP. I'm arguing for big-endian to be
> >used.
>
> Not a chance in hell.

Hm. I got your attention :-)

> The whole point of IA-64 is to run x86 binaries while still being
> able to do large data-sets (if you didn't want to run x86 binaries
> you should just buy an alpha instead, and forget about IA-64).

Ah, I see.

> And I'm not going to accept a IA-64 port that does big-endian IA-64
> mode and little-endian x86 mode. That's just too ugly for words.

Yes, given the x86 compatibility, I agree with that.

> >I implore you: please reconsider your decision. Don't punish Linux
> >because of the x86 legacy.
>
> Buy an ultra64 if you need big-endian and 64 bits. Really.

Sigh. Or MIPS. It's a shame, but I have to agree with your
reasoning. I hadn't considered the x86 compatibility aspect.

> Mixing endianness on the fly is certainly possible, but stupid
> unless you have some REALLY good reason for it. And quite frankly,
> there are NEVER any good technical reasons for considering one
> endianness over another (it's a completely arbitrary thing).

Yes, it is, although I don't get to choose the binary format of
data. And memory mapping is so much better than plain reading.

Anyway, nevermind.

Regards,

Richard....

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