From: Chris Friesen <cfriesen@nortel.com>
To: Gabriel Paubert <paubert@iram.es>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: question on inline assembly and long long values
Date: Wed, 06 Apr 2005 15:37:33 -0600 [thread overview]
Message-ID: <4254569D.2050300@nortel.com> (raw)
In-Reply-To: <20050406211843.GA2737@iram.es>
Gabriel Paubert wrote:
> On Wed, Apr 06, 2005 at 02:01:20PM -0600, Chris Friesen wrote:
>>static inline unsigned long long getmsr()
>>{
>> unsigned long long val;
>> asm volatile( \
>> "mfmsr %L0 \n\t" \
>> "rldicl %0,%L0,32,32 \n\t" \
>> "rldicl %L0,%L0,0,32 \n\t" \
>> : "=r" (val));
>> return val;
>>}
> If you are running in 32 bit mode, you don't need
> to clear the upper half of %L0.
Thanks for the tip. That cuts out another instruction.
Chris
next prev parent reply other threads:[~2005-04-06 21:37 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-06 18:26 question on inline assembly and long long values Chris Friesen
2005-04-06 19:16 ` Kumar Gala
2005-04-06 20:01 ` Chris Friesen
2005-04-06 21:18 ` Gabriel Paubert
2005-04-06 21:37 ` Chris Friesen [this message]
2005-04-06 23:19 ` Benjamin Herrenschmidt
2005-04-06 23:30 ` Chris Friesen
2005-04-06 23:49 ` Benjamin Herrenschmidt
2005-04-06 23:56 ` Chris Friesen
2005-04-06 23:57 ` Benjamin Herrenschmidt
2005-04-07 0:09 ` Chris Friesen
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