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Re: [Qemu-devel] [PATCH] RISCV: support riscv vector extension 0.7.1


From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH] RISCV: support riscv vector extension 0.7.1
Date: Wed, 28 Aug 2019 09:39:24 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

On 8/28/19 2:08 AM, Alex Bennée wrote:
> If you want to do vectors I suggest you look at the TCGvec types for
> passing pointers to vector registers to helpers. In this case you will
> want to ensure your vector registers are properly aligned.

The risc-v vector extension is very different from any other existing vector
extension.  In particular, the locations of the vector elements vary
dynamically.  Except for certain special cases I doubt that risc-v can make
direct use of the generic TCG vector support.


r~



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