app/test-pmd/macswap_sse.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Intel Corporation
   3  */
   4
   5 #ifndef _MACSWAP_SSE_H_
   6 #define _MACSWAP_SSE_H_
   7
   8 #include "macswap_common.h"
   9
  10 static inline void
  11 do_macswap(struct rte_mbuf *pkts[], uint16_t nb,
  12                 struct rte_port *txp)
  13 {
  14         struct ether_hdr *eth_hdr;
  15         struct rte_mbuf *mb;
  16         uint64_t ol_flags;
  17         int i;
  18         __m128i addr;
  19         /**
  20          * shuffle mask be used to shuffle the 16 bytes.
  21          * byte 0-5 wills be swapped with byte 6-11.
  22          * byte 12-15 will keep unchanged.
  23          */
  24         __m128i shfl_msk = _mm_set_epi8(15, 14, 13, 12,
  25                                         5, 4, 3, 2,
  26                                         1, 0, 11, 10,
  27                                         9, 8, 7, 6);
  28
  29         ol_flags = ol_flags_init(txp->dev_conf.txmode.offloads);
  30         vlan_qinq_set(pkts, nb, ol_flags,
  31                         txp->tx_vlan_id, txp->tx_vlan_id_outer);
  32
  33         for (i = 0; i < nb; i++) {
  34                 if (likely(i < nb - 1))
  35                         rte_prefetch0(rte_pktmbuf_mtod(pkts[i+1], void *));
  36                 mb = pkts[i];
  37
  38                 eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *);
  39
  40                 /* Swap dest and src mac addresses. */
  41                 addr = _mm_loadu_si128((__m128i *)eth_hdr);
  42                 addr = _mm_shuffle_epi8(addr, shfl_msk);
  43                 _mm_storeu_si128((__m128i *)eth_hdr, addr);
  44
  45                 mbuf_field_set(mb, ol_flags);
  46         }
  47 }
  48
  49 #endif /* _MACSWAP_SSE_H_ */