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Re: [RFC 00/15] support subsets of bitmanip extension

From: Frank Chang
Subject: Re: [RFC 00/15] support subsets of bitmanip extension
Date: Fri, 20 Nov 2020 09:45:25 +0800

On Fri, Nov 20, 2020 at 6:26 AM Richard Henderson <richard.henderson@linaro.org> wrote:
On 11/18/20 12:29 AM, frank.chang@sifive.com wrote:
> This patchset implements RISC-V B-extension latest draft version
> (2020.10.26) Zbb, Zbs and Zba subset instructions.

With some additional instructions from Zbp, it seems.  Although the document
isn't completely coherent, with various instructions being present in multiple
subsets, and some instructions w/ strike-out.

The B extension requires more than these three, but I suppose turning it on
with just these 3 subsets during development is ok.


Yes, some instructions are striked out and moved to another subset during my implementation.
The B extension spec. is still changing occasionally.

I will send out the next patchset based on your comments.
Thanks for the reviews.

Frank Chang

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