linux-kernel - Re: [PATCH] riscv: Optimize hweight API with Zbb extension

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Message-Id: 
 <170578499888.24348.15332028365241008797.git-patchwork-notify@kernel.org>
Date: Sat, 20 Jan 2024 21:09:58 +0000
From: patchwork-bot+linux-riscv@...nel.org
To: Xiao Wang <xiao.w.wang@...el.com>
Cc: linux-riscv@...ts.infradead.org, paul.walmsley@...ive.com,
 palmer@...belt.com, aou@...s.berkeley.edu, anup@...infault.org,
 haicheng.li@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] riscv: Optimize hweight API with Zbb extension

Hello:

This patch was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <palmer@...osinc.com>:

On Sun, 12 Nov 2023 17:52:44 +0800 you wrote:
> The Hamming Weight of a number is the total number of bits set in it, so
> the cpop/cpopw instruction from Zbb extension can be used to accelerate
> hweight() API.
> 
> Signed-off-by: Xiao Wang <xiao.w.wang@...el.com>
> ---
>  arch/riscv/include/asm/arch_hweight.h | 78 +++++++++++++++++++++++++++
>  arch/riscv/include/asm/bitops.h       |  4 +-
>  2 files changed, 81 insertions(+), 1 deletion(-)
>  create mode 100644 arch/riscv/include/asm/arch_hweight.h

Here is the summary with links:
  - riscv: Optimize hweight API with Zbb extension
    https://git.kernel.org/riscv/c/55ca8d7aa2af

You are awesome, thank you!
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