From: Paul Brook <paul@codesourcery.com>
To: danny.backx@scarlet.be
Cc: gcc@gcc.gnu.org, Dave Korn <dave.korn.cygwin@googlemail.com>
Subject: Re: ARM wmmx instructions from gcc ?
Date: Thu, 03 Sep 2009 11:31:00 -0000 [thread overview]
Message-ID: <200909031231.35464.paul@codesourcery.com> (raw)
In-Reply-To: <1251905870.6106.127.camel@pavilion>
> > Both. By my reading the ABI you're trying to implement does not provide
> > the guarantees required to use iwmmxt instructions. There are ways around
> > this, but none of them are simple or pretty. The simplest answer is
> > "don't do that".
>
> Hi Paul,
>
> Thanks for the answer, but I'm not sure what you've told me and why.
> Could you expand a little ?
>
> Don't do what ? Use WMMX instructions in GCC ?
> or
> Don't try to use the current implementation with WMMX ?
iwmmxt instructions require doubleword data alignment . Your target
[apparently] can't provide that. You loose.
Paul
prev parent reply other threads:[~2009-09-03 11:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-31 15:26 Danny Backx
2009-08-31 15:40 ` Dave Korn
2009-08-31 19:30 ` Danny Backx
2009-09-02 12:35 ` Paul Brook
2009-09-02 15:36 ` Danny Backx
2009-09-03 11:31 ` Paul Brook [this message]
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