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Re: [Qemu-devel] [PATCH v1 08/33] s390x/tcg: Implement VECTOR LOAD

From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH v1 08/33] s390x/tcg: Implement VECTOR LOAD
Date: Thu, 28 Feb 2019 08:34:33 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0

On 2/27/19 11:48 PM, David Hildenbrand wrote:
> I think that would be wrong. It is only an alignment hint.
> "Setting the alignment hint to a non-zero value
> that doesn’t correspond to the alignment of the second operand may
> reduce performance on some models."
> So we must not inject an exception when unaligned. This, however would
> be the result of MO_ALIGN,, right?

Ah, I didn't get that an alignment exception is not raised.  (I do find that
odd.  If the user is asserting a given alignment, why would we not tell him if
he is wrong?)

So, yes, ignore all of this from me -- leave MO_ALIGN off.


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