mirror of https://github.com/F-Stack/f-stack.git
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2016-2018 Intel Corporation.
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* Copyright(c) 2017-2018 Linaro Limited.
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* Copyright(C) 2022 Marvell.
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*/
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#ifndef PORT_GROUP_H
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#define PORT_GROUP_H
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#include "pkt_group.h"
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/*
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* Group consecutive packets with the same destination port in bursts of 4.
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* Suppose we have array of destination ports:
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* dst_port[] = {a, b, c, d,, e, ... }
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* dp1 should contain: <a, b, c, d>, dp2: <b, c, d, e>.
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* We doing 4 comparisons at once and the result is 4 bit mask.
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* This mask is used as an index into prebuild array of pnum values.
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*/
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static inline uint16_t *
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port_groupx4(uint16_t pn[FWDSTEP + 1], uint16_t *lp, uint16x8_t dp1,
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uint16x8_t dp2)
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{
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union {
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uint16_t u16[FWDSTEP + 1];
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uint64_t u64;
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} __rte_packed *pnum = (void *)pn;
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uint16x8_t mask = {1, 2, 4, 8, 0, 0, 0, 0};
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int32_t v;
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dp1 = vceqq_u16(dp1, dp2);
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dp1 = vandq_u16(dp1, mask);
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v = vaddvq_u16(dp1);
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/* update last port counter. */
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lp[0] += gptbl[v].lpv;
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rte_compiler_barrier();
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/* if dest port value has changed. */
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if (v != GRPMSK) {
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pnum->u64 = gptbl[v].pnum;
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pnum->u16[FWDSTEP] = 1;
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lp = pnum->u16 + gptbl[v].idx;
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}
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return lp;
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}
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#endif /* PORT_GROUP_H */
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