Re: [PATCH 07/12] x86-64: Simplify constraints for fxsave/fxtstor

From: H. Peter Anvin
Date: Thu Sep 09 2010 - 17:23:58 EST


On 09/03/2010 06:17 PM, Brian Gerst wrote:
> Use the "R" constraint (legacy register) instead of listing all the
> possible registers. Clean up the comments as well.
>
> Signed-off-by: Brian Gerst <brgerst@xxxxxxxxx>

Hi Brian,

Have you tested this on *old* versions of gcc? Since the whole point of
that butt-ugly code sequence is to support now-historic versions of
binutils, we need to make sure that "R" was supposed on the
corresponding gcc versions...

-hpa
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