From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from rv-out-0708.google.com (rv-out-0708.google.com [209.85.198.244]) by bilbo.ozlabs.org (Postfix) with ESMTP id DF7B7B708B for ; Tue, 21 Jul 2009 10:16:06 +1000 (EST) Received: by rv-out-0708.google.com with SMTP id f25so976157rvb.2 for ; Mon, 20 Jul 2009 17:16:05 -0700 (PDT) Message-ID: <4A6508AD.6090207@gmail.com> Date: Tue, 21 Jul 2009 09:15:41 +0900 From: HongWoo Lee MIME-Version: 1.0 To: Benjamin Herrenschmidt Subject: Re: Simple question about powerpc kernel source. References: <4A643219.3070004@gmail.com> <1248084158.30899.8.camel@pasglop> In-Reply-To: <1248084158.30899.8.camel@pasglop> Content-Type: multipart/alternative; boundary="------------010104040704080805020304" Cc: linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. --------------010104040704080805020304 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit -------- Original Message -------- Subject: Re: Simple question about powerpc kernel source. From: Benjamin Herrenschmidt To: HongWoo Lee Cc: linuxppc-dev@lists.ozlabs.org Date: Mon Jul 20 2009 19:02:38 GMT+0900 > On Mon, 2009-07-20 at 18:00 +0900, HongWoo Lee wrote: > >> Hi all, >> >> I have something to ask for the ppc kernel source. >> >> #define LOADADDR(rn,name) \ >> lis rn,name##@highest; \ >> ori rn,rn,name##@higher; \ >> rldicr rn,rn,32,31; \ >> oris rn,rn,name##@h; \ >> ori rn,rn,name##@l >> >> Is ## used for concatenation. I'm not sure because it is just meaningless. >> If so what on earth is the result of concatenating ? >> >> And is there a good reference to understand powerpc asm ? >> I'm reading Power ISA, but I can't find @highest, @higher and ##. >> It would be good to know the reference book. >> > > You already asked pretty much the same question with the subject "Simple > question about powerpc asm" and it was already replied to. > > Cheers, > Ben. > > > Thank you, Ben. First, I aleady understood about @highest, @higher, @h and @l. For now, what I want to know is about "##" in the below code. #define LOADADDR(rn,name) \ lis rn,name##@highest; \ ori rn,rn,name##@higher; \ rldicr rn,rn,32,31; \ oris rn,rn,name##@h; \ ori rn,rn,name##@l And I don't want to ask every detail. So I want to know the manual or document which describes the detail. Regards, HongWoo. --------------010104040704080805020304 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit -------- Original Message  --------
Subject: Re: Simple question about powerpc kernel source.
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: HongWoo Lee <hongwoo7@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org
Date: Mon Jul 20 2009 19:02:38 GMT+0900 
On Mon, 2009-07-20 at 18:00 +0900, HongWoo Lee wrote:
  
Hi all,

I have something to ask for the ppc kernel source.

#define LOADADDR(rn,name)           \
    lis     rn,name##@highest;      \
    ori     rn,rn,name##@higher;    \
    rldicr  rn,rn,32,31;            \
    oris    rn,rn,name##@h;         \
    ori     rn,rn,name##@l

Is ## used for concatenation. I'm not sure because it is just meaningless.
If so what on earth is the result of concatenating ?

And is there a good reference to understand powerpc asm ?
I'm reading Power ISA, but I can't find @highest, @higher and ##.
It would be good to know the reference book.
    

You already asked pretty much the same question with the subject "Simple
question about powerpc asm" and it was already replied to.

Cheers,
Ben.

Thank you, Ben.

First, I aleady understood about @highest, @higher, @h and @l.
For now, what I want to know is about "##" in the below code. 

#define LOADADDR(rn,name)           \
    lis     rn,name##@highest;      \
    ori     rn,rn,name##@higher;    \
    rldicr  rn,rn,32,31;            \
    oris    rn,rn,name##@h;         \
    ori     rn,rn,name##@l

And I don't want to ask every detail.
So I want to know the manual or document which describes the detail.


Regards,
HongWoo.

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