Re: HP-UX 11i for Itanium : endian

From: Jim Hollenback (jholly_at_cup.hp.com)
Date: 05/30/03

  • Next message: Michael Hamila: "Last day of May HP 9000 specials" 
    Date: 30 May 2003 09:21:32 -0700

    kenneth kahn (kenkahn@optonline.net) wrote:
    : Just to make sure I'm understanding this correctly; we currently have
    : software running on various PARisc HP-UX Machines that we need to port
    : over to the Itanium platform. Our first thought was Linux for
    : Itanium, but the problem is all of our current code runs on existing
    : big-endian (BE) based UNIX platforms such as AIX, Solaris and HP-UX,
    : and are dependent on BE data structures, and my understanding is Linux
    : for Itanium on runs little-endian (LE) (right?).

    Yep.

    : I then though of
    : HP-UX for Itanium, but (and this is where I need some veification) am
    : I correct that the endian 'type' of the OS is dictated by the
    : underlying hardware (right?),

    Like the PA chip, the Itanium can do it both ways. I fact it is possible
    to run LE Linux code on a BE HP-UX IPF. One just need to flip some data
    structures around and flip the endian bit.

    : so HP-UX for Itanium would still be a LE
    : based OS (right?).

    wrong. HP-UX is a BE os, PA or IPF.

    : I've seen mention on the newsgroups of a BE
    : emulator for HP-UX for Itanium, but that doesn't sound very
    : performance oriented.

    especially since HP-UX on Itnaium is BE.

    : If my thoughts are correct, then we have some big BE<->LE issues to
    : resolve, but I thought I'd just verify my facts first.

    None that I can see. 

    --
Jim Hollenback
jholly@cup.hp.com
my opinion.
  • Next message: Michael Hamila: "Last day of May HP 9000 specials"

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