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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#ifndef _RTE_LPM_SSE_H_
#define _RTE_LPM_SSE_H_
#include <rte_branch_prediction.h>
#include <rte_byteorder.h>
#include <rte_common.h>
#include <rte_vect.h>
#include <rte_lpm.h>
#ifdef __cplusplus
extern "C" {
#endif
static inline void
rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
uint32_t defv)
{
__m128i i24;
rte_xmm_t i8;
uint32_t tbl[4];
uint64_t idx, pt, pt2;
const uint32_t *ptbl;
const __m128i mask8 =
_mm_set_epi32(UINT8_MAX, UINT8_MAX, UINT8_MAX, UINT8_MAX);
/*
* RTE_LPM_VALID_EXT_ENTRY_BITMASK for 2 LPM entries
* as one 64-bit value (0x0300000003000000).
*/
const uint64_t mask_xv =
((uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK |
(uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK << 32);
/*
* RTE_LPM_LOOKUP_SUCCESS for 2 LPM entries
* as one 64-bit value (0x0100000001000000).
*/
const uint64_t mask_v =
((uint64_t)RTE_LPM_LOOKUP_SUCCESS |
(uint64_t)RTE_LPM_LOOKUP_SUCCESS << 32);
/* get 4 indexes for tbl24[]. */
i24 = _mm_srli_epi32(ip, CHAR_BIT);
/* extract values from tbl24[] */
idx = _mm_cvtsi128_si64(i24);
/* With -O0 option, gcc 4.8 - 5.4 fails to fold sizeof() into a constant */
i24 = _mm_srli_si128(i24, /* sizeof(uint64_t) */ 8);
ptbl = (const uint32_t *)&lpm->tbl24[(uint32_t)idx];
tbl[0] = *ptbl;
ptbl = (const uint32_t *)&lpm->tbl24[idx >> 32];
tbl[1] = *ptbl;
idx = _mm_cvtsi128_si64(i24);
ptbl = (const uint32_t *)&lpm->tbl24[(uint32_t)idx];
tbl[2] = *ptbl;
ptbl = (const uint32_t *)&lpm->tbl24[idx >> 32];
tbl[3] = *ptbl;
/* get 4 indexes for tbl8[]. */
i8.x = _mm_and_si128(ip, mask8);
pt = (uint64_t)tbl[0] |
(uint64_t)tbl[1] << 32;
pt2 = (uint64_t)tbl[2] |
(uint64_t)tbl[3] << 32;
/* search successfully finished for all 4 IP addresses. */
if (likely((pt & mask_xv) == mask_v) &&
likely((pt2 & mask_xv) == mask_v)) {
*(uint64_t *)hop = pt & RTE_LPM_MASKX4_RES;
*(uint64_t *)(hop + 2) = pt2 & RTE_LPM_MASKX4_RES;
return;
}
if (unlikely((pt & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
i8.u32[0] = i8.u32[0] +
(uint8_t)tbl[0] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[0]];
tbl[0] = *ptbl;
}
if (unlikely((pt >> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
i8.u32[1] = i8.u32[1] +
(uint8_t)tbl[1] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[1]];
tbl[1] = *ptbl;
}
if (unlikely((pt2 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
i8.u32[2] = i8.u32[2] +
(uint8_t)tbl[2] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[2]];
tbl[2] = *ptbl;
}
if (unlikely((pt2 >> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
i8.u32[3] = i8.u32[3] +
(uint8_t)tbl[3] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[3]];
tbl[3] = *ptbl;
}
hop[0] = (tbl[0] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[0] & 0x00FFFFFF : defv;
hop[1] = (tbl[1] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[1] & 0x00FFFFFF : defv;
hop[2] = (tbl[2] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[2] & 0x00FFFFFF : defv;
hop[3] = (tbl[3] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[3] & 0x00FFFFFF : defv;
}
#ifdef __cplusplus
}
#endif
#endif /* _RTE_LPM_SSE_H_ */
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