crypto/mlx5: add maximum segments configuration
[dpdk.git] / lib / lpm / rte_lpm_sse.h
1 /* SPDX-License-Identifier: BSD-3-Clause
2  * Copyright(c) 2010-2014 Intel Corporation
3  */
4
5 #ifndef _RTE_LPM_SSE_H_
6 #define _RTE_LPM_SSE_H_
7
8 #include <rte_branch_prediction.h>
9 #include <rte_byteorder.h>
10 #include <rte_common.h>
11 #include <rte_vect.h>
12
13 #ifdef __cplusplus
14 extern "C" {
15 #endif
16
17 static inline void
18 rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
19         uint32_t defv)
20 {
21         __m128i i24;
22         rte_xmm_t i8;
23         uint32_t tbl[4];
24         uint64_t idx, pt, pt2;
25         const uint32_t *ptbl;
26
27         const __m128i mask8 =
28                 _mm_set_epi32(UINT8_MAX, UINT8_MAX, UINT8_MAX, UINT8_MAX);
29
30         /*
31          * RTE_LPM_VALID_EXT_ENTRY_BITMASK for 2 LPM entries
32          * as one 64-bit value (0x0300000003000000).
33          */
34         const uint64_t mask_xv =
35                 ((uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK |
36                 (uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK << 32);
37
38         /*
39          * RTE_LPM_LOOKUP_SUCCESS for 2 LPM entries
40          * as one 64-bit value (0x0100000001000000).
41          */
42         const uint64_t mask_v =
43                 ((uint64_t)RTE_LPM_LOOKUP_SUCCESS |
44                 (uint64_t)RTE_LPM_LOOKUP_SUCCESS << 32);
45
46         /* get 4 indexes for tbl24[]. */
47         i24 = _mm_srli_epi32(ip, CHAR_BIT);
48
49         /* extract values from tbl24[] */
50         idx = _mm_cvtsi128_si64(i24);
51         /* With -O0 option, gcc 4.8 - 5.4 fails to fold sizeof() into a constant */
52         i24 = _mm_srli_si128(i24, /* sizeof(uint64_t) */ 8);
53
54         ptbl = (const uint32_t *)&lpm->tbl24[(uint32_t)idx];
55         tbl[0] = *ptbl;
56         ptbl = (const uint32_t *)&lpm->tbl24[idx >> 32];
57         tbl[1] = *ptbl;
58
59         idx = _mm_cvtsi128_si64(i24);
60
61         ptbl = (const uint32_t *)&lpm->tbl24[(uint32_t)idx];
62         tbl[2] = *ptbl;
63         ptbl = (const uint32_t *)&lpm->tbl24[idx >> 32];
64         tbl[3] = *ptbl;
65
66         /* get 4 indexes for tbl8[]. */
67         i8.x = _mm_and_si128(ip, mask8);
68
69         pt = (uint64_t)tbl[0] |
70                 (uint64_t)tbl[1] << 32;
71         pt2 = (uint64_t)tbl[2] |
72                 (uint64_t)tbl[3] << 32;
73
74         /* search successfully finished for all 4 IP addresses. */
75         if (likely((pt & mask_xv) == mask_v) &&
76                         likely((pt2 & mask_xv) == mask_v)) {
77                 *(uint64_t *)hop = pt & RTE_LPM_MASKX4_RES;
78                 *(uint64_t *)(hop + 2) = pt2 & RTE_LPM_MASKX4_RES;
79                 return;
80         }
81
82         if (unlikely((pt & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
83                         RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
84                 i8.u32[0] = i8.u32[0] +
85                         (tbl[0] & 0x00FFFFFF) * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
86                 ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[0]];
87                 tbl[0] = *ptbl;
88         }
89         if (unlikely((pt >> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
90                         RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
91                 i8.u32[1] = i8.u32[1] +
92                         (tbl[1] & 0x00FFFFFF) * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
93                 ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[1]];
94                 tbl[1] = *ptbl;
95         }
96         if (unlikely((pt2 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
97                         RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
98                 i8.u32[2] = i8.u32[2] +
99                         (tbl[2] & 0x00FFFFFF) * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
100                 ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[2]];
101                 tbl[2] = *ptbl;
102         }
103         if (unlikely((pt2 >> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
104                         RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
105                 i8.u32[3] = i8.u32[3] +
106                         (tbl[3] & 0x00FFFFFF) * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
107                 ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[3]];
108                 tbl[3] = *ptbl;
109         }
110
111         hop[0] = (tbl[0] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[0] & 0x00FFFFFF : defv;
112         hop[1] = (tbl[1] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[1] & 0x00FFFFFF : defv;
113         hop[2] = (tbl[2] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[2] & 0x00FFFFFF : defv;
114         hop[3] = (tbl[3] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[3] & 0x00FFFFFF : defv;
115 }
116
117 #ifdef __cplusplus
118 }
119 #endif
120
121 #endif /* _RTE_LPM_SSE_H_ */