From: Kevin Diggs <kevdig@hypersurf•com>
To: linuxppc-dev@ozlabs•org
Subject: questions
Date: Sun, 25 May 2008 17:32:29 -0700 [thread overview]
Message-ID: <483A051D.1010108@hypersurf.com> (raw)
Hi,
In idle_6xx.S one finds instructions like:
lis r4,powersave_nap@ha
lwz r4,powersave_nap@l(r4)
Can someone explain what this is doing? Presumably the first is loading
an address and the second a value. What do the '@ha' and '@l' do?
Also, is there any performance difference between:
lbz rD,d(rA)
lhz rD,d(rA)
lwz rD,d(rA)
While I'm wasting your time, I picked up an ADB infrared wireless
keyboard. I think it works. But not under Linux. Should it?
And is there any reason to prefer one over the other for doing byte
swapping:
lwbrx rD,rA,rB
stwbrx rS,rA,rB
kevin
next reply other threads:[~2008-05-26 0:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-26 0:32 Kevin Diggs [this message]
2008-05-25 21:31 ` questions Brad Boyer
-- strict thread matches above, loose matches on Subject: below --
1999-12-23 3:08 questions Ted Merrill
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