From: Nathan Sidwell <nathan@codesourcery.com>
To: Rayappan.External@infineon.com
Cc: gcc-help@gcc.gnu.org
Subject: Re: Inline assembly
Date: Mon, 06 Jun 2005 15:33:00 -0000 [thread overview]
Message-ID: <42A46CBA.6030701@codesourcery.com> (raw)
In-Reply-To: <04EE7AD0450F7B498BA216312943A1A11D9EA1@blrse201.ap.infineon.com>
Rayappan.External@infineon.com wrote:
> Hi,
>
> This kind of inline assembly is given in the GCC Test suits
>
> asm ("" : "=r" (tmp) : "0" (tmp));
>
> As per my understanding the input and output remains in the same
> register.But there is no instruction in the first double coats("").
>
> The Question is
>
> What will be the value of r(tmp) after this instruction.Whether it is
> equivalent to
tmp will be unchanged from whatever was in it before. TGhe "0" is a constraint
saying tmp should start out in the same register as the result of that asm.
nathan
--
Nathan Sidwell :: http://www.codesourcery.com :: CodeSourcery LLC
nathan@codesourcery.com :: http://www.planetfall.pwp.blueyonder.co.uk
next prev parent reply other threads:[~2005-06-06 15:33 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-06 12:53 Rayappan.External
2005-06-06 15:33 ` Nathan Sidwell [this message]
-- strict thread matches above, loose matches on Subject: below --
2000-01-05 1:07 Harald Dankworth
2000-01-05 10:13 ` d_cary
2000-01-07 6:31 ` Harald Dankworth
2000-04-01 0:00 ` Harald Dankworth
2000-04-01 0:00 ` d_cary
2000-04-01 0:00 ` Harald Dankworth
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