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Re: [Qemu-ppc] [Qemu-devel] [PATCH v4 2/8] target/ppc: rework vmrg{l, h}

From: Richard Henderson
Subject: Re: [Qemu-ppc] [Qemu-devel] [PATCH v4 2/8] target/ppc: rework vmrg{l, h}{b, h, w} instructions to use Vsr* macros
Date: Wed, 30 Jan 2019 10:22:01 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0

On 1/30/19 8:06 AM, BALATON Zoltan wrote:
> Also I wonder if you really need the result local? Can't it just access the
> result via *r directly and save a copy at the end? (Although that probably
> would be optimised out by the compiler anyway.)

I don't think so, because of potential overlap between *r and *a or *b.


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