[PATCH v2 1/2] riscv: simplify longjmp

[Leo Liang <ycliang@andestech.com>]

Hi Heinrich,

On Mon, Mar 22, 2021 at 12:02:48PM +0100, Heinrich Schuchardt wrote:
> The value returned by setjmp must be nonzero. If zero is passed as
> parameter it must be replaced by 1.
> 
> This patch reduces the code size a bit.
> 
> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
> Sean Anderson <seanga2@gmail.com>

I think Sean is refering to the "Reviewed-by" tag is missing.
Otherwise than that, LGTM.

> ---
> v2:
> 	fix typo in title
> ---
>  arch/riscv/lib/setjmp.S | 8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/riscv/lib/setjmp.S b/arch/riscv/lib/setjmp.S
> index 72bc9241f6..99d6195827 100644
> --- a/arch/riscv/lib/setjmp.S
> +++ b/arch/riscv/lib/setjmp.S
> @@ -54,12 +54,8 @@ ENTRY(longjmp)
>  	LOAD_IDX(sp, 13)
> 
>  	/* Move the return value in place, but return 1 if passed 0. */
> -	beq a1, zero, longjmp_1
> -	mv a0, a1
> -	ret
> -
> -	longjmp_1:
> -	li a0, 1
> +	seqz a0, a1
> +	add a0, a0, a1
>  	ret
>  ENDPROC(longjmp)
>  .popsection
> --
> 2.30.2
>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>

Best regards,
Leo