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Re: x86 leal quirk

From: Richard Henderson <rth at redhat dot com>
To: Ulrich Drepper <drepper at redhat dot com>
Cc: Richard Henderson <rth at twiddle dot net>, binutils at gcc dot gnu dot org
Date: Mon, 23 Sep 2002 19:36:13 -0400
Subject: Re: x86 leal quirk
References: <20020923152308.A28797@twiddle.net> <3D8F96A0.2090507@redhat.com> <20020923161505.A12183@twiddle.net> <3D8FA367.4030500@redhat.com>

On Mon, Sep 23, 2002 at 04:27:35PM -0700, Ulrich Drepper wrote:
> Makes little sense, does it?  leal implies %ds.  Why shouldn't a %ds
> override be allowed?

Because leal doesn't imply _any_ segment.  Only true memory
references involve a segment.

leal just reuses part of the address generation logic to do
a couple of adds and a shift.

r~

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  - From: Richard Henderson
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