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Date: Fri, 27 May 2022 13:15:20 -0700
From: Stephen Hemminger <stephen@networkplumber.org>
To: Stanislaw Kardach <kda@semihalf.com>
Cc: Vladimir Medvedkin <vladimir.medvedkin@intel.com>, Michal Mazurek
<maz@semihalf.com>, dev@dpdk.org, Frank Zhao <Frank.Zhao@starfivetech.com>,
Sam Grove <sam.grove@sifive.com>, mw@semihalf.com, upstream@semihalf.com
Subject: Re: [PATCH v2 2/2] lpm: add a scalar version of lookupx4 function
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On Fri, 27 May 2022 20:18:22 +0200
Stanislaw Kardach <kda@semihalf.com> wrote:
> +static inline void
> +rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
> + uint32_t defv)
> +{
> + uint32_t nh;
> + int i, ret;
> +
> + for (i = 0; i < 4; i++) {
> + ret = rte_lpm_lookup(lpm, ((rte_xmm_t)ip).u32[i], &nh);
> + hop[i] = (ret == 0) ? nh : defv;
> + }
> +}
For performance, manually unroll the loop.