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From: Andreas Tobler <toa@pop.agri.ch>
To: Andrew Haley <aph@redhat.com>
Cc: Piotr Wyderski <piotr.wyderski@hoga.pl>,  gcc@gcc.gnu.org
Subject: Re: __attribute__ ((aligned)) weirdness
Date: Tue, 18 Mar 2003 22:34:00 -0000	[thread overview]
Message-ID: <3E778C1B.8070203@pop.agri.ch> (raw)
In-Reply-To: <15991.31521.926999.664353@cuddles.cambridge.redhat.com>

Andrew Haley wrote:
> Piotr Wyderski writes:
>  > > So you have a field at offset 4.  You ask for it to be 4-aligned, and
>  > > it jumps to offset 8.
>  > > 
>  > > What is going on?
>  > 
>  > The alignment of x means that the offset of a variable is divisible
>  > by x with no remainder. Each y=x*2^n (where n is natural) is
>  > a good alignment too, because f mod y = 0 => f mod x = 0;
>  > 8-aligned field is also 4-aligned. So where's the problem?
> 
> I need to know why this happens.

Could this be related? No explanation, sorry.

http://gcc.gnu.org/ml/gcc/2003-02/msg00353.html

Andreas

  reply	other threads:[~2003-03-18 21:13 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-03-18 16:16 g++: " Andrew Haley
2003-03-18 20:24 ` Piotr Wyderski
2003-03-18 20:28   ` Andrew Haley
2003-03-18 22:34     ` Andreas Tobler [this message]
2003-04-08  8:01       ` PPC support in GCC ? A.R. Ashok Kumar
2003-04-08 14:45         ` Falk Hueffner
2003-04-08 14:51           ` A.R. Ashok Kumar

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