The patch optimizes the mac swap operation by taking advantage
of SSE instructions, it only impacts x86 platform.
Signed-off-by: Qi Zhang <qi.z.zh...@intel.com>
---
app/test-pmd/macswap.c | 4 ++++
app/test-pmd/macswap_sse.h | 49 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 53 insertions(+)
create mode 100644 app/test-pmd/macswap_sse.h
diff --git a/app/test-pmd/macswap.c b/app/test-pmd/macswap.c
index 849194fe2..cbb41b728 100644
--- a/app/test-pmd/macswap.c
+++ b/app/test-pmd/macswap.c
@@ -66,7 +66,11 @@
#include <rte_flow.h>
#include "testpmd.h"
+#ifdef RTE_ARCH_X86
+#include "macswap_sse.h"
+#else
#include "macswap.h"
+#endif
/*
* MAC swap forwarding mode: Swap the source and the destination Ethernet
diff --git a/app/test-pmd/macswap_sse.h b/app/test-pmd/macswap_sse.h
new file mode 100644
index 000000000..79c7e9883
--- /dev/null
+++ b/app/test-pmd/macswap_sse.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#ifndef _MACSWAP_SSE_H_
+#define _MACSWAP_SSE_H_
+
+#include "macswap_common.h"
+
+static inline void
+do_macswap(struct rte_mbuf *pkts[], uint16_t nb,
+ struct rte_port *txp)
+{
+ struct ether_hdr *eth_hdr;
+ struct rte_mbuf *mb;
+ uint64_t ol_flags;
+ int i;
+ __m128i addr;
+ /**
+ * shuffle mask be used to shuffle the 16 bytes.
+ * byte 0-5 wills be swapped with byte 6-11.
+ * byte 12-15 will keep unchanged.
+ */
+ __m128i shfl_msk = _mm_set_epi8(15, 14, 13, 12,
+ 5, 4, 3, 2,
+ 1, 0, 11, 10,
+ 9, 8, 7, 6);
+
+ ol_flags = ol_flags_init(txp->dev_conf.txmode.offloads);
+ vlan_qinq_set(pkts, nb, ol_flags,
+ txp->tx_vlan_id, txp->tx_vlan_id_outer);
+
+ for (i = 0; i < nb; i++) {
+ if (likely(i < nb - 1))
+ rte_prefetch0(rte_pktmbuf_mtod(pkts[i+1], void *));
+ mb = pkts[i];
+
+ eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *);
+
+ /* Swap dest and src mac addresses. */
+ addr = _mm_loadu_si128((__m128i *)eth_hdr);
+ addr = _mm_shuffle_epi8(addr, shfl_msk);
+ _mm_storeu_si128((__m128i *)eth_hdr, addr);
+
+ mbuf_field_set(mb, ol_flags);
+ }
+}
+
+#endif /* _MACSWAP_SSE_H_ */
--
2.13.6
