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Re: [Qemu-devel] [PATCH v1 20/33] s390x/tcg: Implement VECTOR PACK

From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH v1 20/33] s390x/tcg: Implement VECTOR PACK
Date: Wed, 27 Feb 2019 15:11:56 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0

On 2/26/19 3:39 AM, David Hildenbrand wrote:
> We cannot use gvex expansion as the element size of source and
> destination differs. So expand manually. Luckily, VECTOR PACK does not
> care about saturation or setting the CC, so it can be implemented
> without a helper. We have to watch out for overlapping source and
> destination registers and use a temporary register in this case.
> Signed-off-by: David Hildenbrand <address@hidden>
> ---
>  target/s390x/insn-data.def      |  2 ++
>  target/s390x/translate_vx.inc.c | 41 +++++++++++++++++++++++++++++++++
>  2 files changed, 43 insertions(+)

Reviewed-by: Richard Henderson <address@hidden>


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