From: Duncan Sands <baldrick@free.fr>
To: llvmdev@cs.uiuc.edu
Subject: Re: [LLVMdev] inline asm semantics: output constraint width smaller 
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Date: Tue, 27 Jan 2009 20:42:56 +0100
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Cc: Ingo Molnar <mingo@elte.hu>,
       =?iso-8859-1?q?T=F6r=F6k_Edwin?= <edwintorok@gmail.com>,
       Thomas Gleixner <tglx@linutronix.de>,
       Linux Kernel <linux-kernel@vger.kernel.org>,
       "H. Peter Anvin" <hpa@zytor.com>
References: <497A0500.3080706@gmail.com> <497B408C.20802@gmail.com> <20090124172758.GA31699@elte.hu>
In-Reply-To: <20090124172758.GA31699@elte.hu>
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Hi,

> If yes then this doesnt look all that bad or invasive at first sight (if 
> the put_user() workaround can be expressed in a cleaner way), but in any 
> case it would be nice to hear an LLVM person's opinion about roughly when 
> this is going to be solved in LLVM itself.

one thing that seems to be clear to everyone except me is... what are the
semantics supposed to be?  [My understanding is that what is being discussed
is when you have an asm with a register as input and output, but with integer
types of different width for the input and output, but I saw some mention of
struct types in this thread...].  Presumably this is something obvious, but
it would be good to have someone spell it out in small words that even someone
like me can understand :)

Thanks,

Duncan.
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