Re: [PATCH] bitops: Provide generic sign_extend function (moving it out from wireless code)

[Andi Kleen]

Andreas Herrmann <herrmann.der.user@xxxxxxxxxxxxxx> writes:
>  
> +/**
> + * sign_extend - Sign extend a value using specified bit as sign-bit
> + * @value: value to sign extend
> + * @index: 0 based bit index (0<=index<32) to sign bit
> + */
> +static inline __s32 sign_extend(__u32 value, int index)
> +{
> +	__u8 shift = 31 - index;
> +	return (__s32)(value << shift) >> shift;
> +}

If it only handles 32bit please call it sign_extend32

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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