Acked-by: Jarno Rajahalme <jrajaha...@nicira.com>
> From 71d0ebf2d9b473bf0f848e3ae76223b35ffd4505 Mon Sep 17 00:00:00 2001
> From: Daniele Di Proietto <diproiet...@vmware.com>
> Date: Wed, 22 Jul 2015 18:41:48 +0100
> Subject: [PATCH] lib: Introduce ovs_u128_is_zero().
>
> is_all_zeros() is quite slow for u128 initialization because:
> - It is not inlined
> - It checks byte by byte
>
> This commit introduces a new function to perform this function, which
> improves performance in the DPDK packet processing path for upcoming
> commits that regularly check u128 values.
> ---
> lib/util.h | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/lib/util.h b/lib/util.h
> index 7080a0c..eebc6e9 100644
> --- a/lib/util.h
> +++ b/lib/util.h
> @@ -568,6 +568,13 @@ ovs_u128_equals(const ovs_u128 *a, const ovs_u128 *b)
> return (a->u64.hi == b->u64.hi) && (a->u64.lo == b->u64.lo);
> }
>
> +/* Returns true if 'val' is 0. */
> +static inline bool
> +ovs_u128_is_zero(const ovs_u128 *val)
> +{
> + return !(val->u64.hi || val->u64.lo);
> +}
> +
> void xsleep(unsigned int seconds);
>
> #ifdef _WIN32
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