Subject: Re: [PATCH bpf-next 3/6] riscv, bpf: Simplify sext and zext logics in branch instructions

From: Simon Horman <[email-masked]>
Date: Sat, 16 Sep 2023 16:47:42 +0200

On Wed, Sep 13, 2023 at 11:34:10PM +0800, Pu Lehui wrote:
> From: Pu Lehui <[email-masked]>
> 
> There are many extension helpers in the current branch instructions, and
> the implementation is a bit complicated. We simplify this logic through
> two simple extension helpers with alternate register.
> 
> Signed-off-by: Pu Lehui <[email-masked]>
> ---
>  arch/riscv/net/bpf_jit_comp64.c | 82 +++++++++++++--------------------
>  1 file changed, 31 insertions(+), 51 deletions(-)
> 
> diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c
> index 4a649e195..1728ce16d 100644
> --- a/arch/riscv/net/bpf_jit_comp64.c
> +++ b/arch/riscv/net/bpf_jit_comp64.c
> @@ -141,6 +141,19 @@ static bool in_auipc_jalr_range(s64 val)
>  		val < ((1L << 31) - (1L << 11));
>  }
>  
> +/* Modify rd pointer to alternate reg to avoid corrupting orignal reg */

Hi Pu Lehui,

nit: original

I suggest running checkpatch --codespell over this series before submitting
v2.