From: Randolph Chung <randolph@tausq.org>
To: John David Anglin <dave@hiauly1.hia.nrc.ca>
Cc: jsoe0708@tiscali.be, parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] Re: uaccess ya patch
Date: Tue, 26 Nov 2002 10:44:55 -0800 [thread overview]
Message-ID: <20021126184455.GK19331@tausq.org> (raw)
In-Reply-To: <200211261731.gAQHVZ4N021906@hiauly1.hia.nrc.ca>
> > maybe you are thinking of floating point registers? %r2 is general
> > register number 2, i.e. the return pointer. it is not what you want to
> > store into memory.
>
> The 'R' operand code selects the second half of a register pair. So
> '%R2' refers to the second half of operand 2 in the asm. Look at
> print_operand in pa.c to see the available codes for asms.
oh, i see, somehow i thought %R2 == %r2...
i guess if a 64-bit number is always passed in a way that we can access
the first half as %1 and the second half as %1R then we can do away with
the masking....
randolph
--
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/
next prev parent reply other threads:[~2002-11-26 18:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-26 10:05 [parisc-linux] uaccess ya patch jsoe0708
2002-11-26 16:29 ` [parisc-linux] " Randolph Chung
2002-11-26 17:02 ` jsoe0708
2002-11-26 17:22 ` Randolph Chung
2002-11-26 17:31 ` John David Anglin
2002-11-26 18:44 ` Randolph Chung [this message]
2002-11-26 18:56 ` John David Anglin
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