From: Richard Henderson <rth@cygnus.com>
To: wilson@cygnus.com (Jim Wilson)
Cc: mrs@wrs.com, egcs@cygnus.com
Subject: Re: m68k structure packing
Date: Tue, 30 Sep 1997 21:13:00 -0000 [thread overview]
Message-ID: <199710010411.VAA23924@dot.cygnus.com> (raw)
In-Reply-To: <199710010258.TAA29729@cygnus.com>
> Gcc knows that it needs to access bitfields differently when a structure
> is packed. It may be that gcc will generate correct code with your patch
> for cases that would ordinarily fail ...
Yes it will. I've used this on a number of occasions to get
machine independant unaligned loads. It works on all machines,
even if gcc has to resort to byte loads and shifts.
r~
next prev parent reply other threads:[~1997-09-30 21:13 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-09-30 12:08 Mike Stump
1997-09-30 12:57 ` Charles M. Hannum
1997-09-30 19:58 ` Jim Wilson
1997-09-30 21:13 ` Richard Henderson [this message]
1997-09-30 21:22 ` Jim Wilson
1997-10-01 15:14 ` Jim Wilson
1997-09-30 13:32 Mike Stump
1997-09-30 14:56 ` Jim Wilson
1997-09-30 16:58 Mike Stump
1997-09-30 18:20 ` Jim Wilson
1997-10-01 9:02 ` Peter Barada
1997-09-30 20:16 Mike Stump
1997-09-30 22:03 ` Jeffrey A Law
1997-09-30 21:42 Jim Wilson
1997-10-01 5:44 ` Kamil Iskra
1997-10-01 12:16 Mike Stump
1997-10-01 12:39 ` Joel Sherrill
1997-10-02 18:37 ` Jim Wilson
1997-10-01 15:08 Mike Stump
1997-10-01 15:56 ` Peter Barada
1997-10-01 16:16 ` Per Bothner
1997-10-02 20:14 ` Jim Wilson
1997-10-02 6:49 ` Paul Koning
1997-10-02 20:09 ` Jim Wilson
1997-10-02 20:01 ` Jim Wilson
1997-10-02 21:40 ` Richard Henderson
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