doc: add inline crypto feature
[dpdk.git] / lib / librte_lpm / rte_lpm_sse.h
1 /*-
2  *   BSD LICENSE
3  *
4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
5  *   All rights reserved.
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9  *   are met:
10  *
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12  *       notice, this list of conditions and the following disclaimer.
13  *     * Redistributions in binary form must reproduce the above copyright
14  *       notice, this list of conditions and the following disclaimer in
15  *       the documentation and/or other materials provided with the
16  *       distribution.
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18  *       contributors may be used to endorse or promote products derived
19  *       from this software without specific prior written permission.
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22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  */
33
34 #ifndef _RTE_LPM_SSE_H_
35 #define _RTE_LPM_SSE_H_
36
37 #include <rte_branch_prediction.h>
38 #include <rte_byteorder.h>
39 #include <rte_common.h>
40 #include <rte_vect.h>
41 #include <rte_lpm.h>
42
43 #ifdef __cplusplus
44 extern "C" {
45 #endif
46
47 static inline void
48 rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
49         uint32_t defv)
50 {
51         __m128i i24;
52         rte_xmm_t i8;
53         uint32_t tbl[4];
54         uint64_t idx, pt, pt2;
55         const uint32_t *ptbl;
56
57         const __m128i mask8 =
58                 _mm_set_epi32(UINT8_MAX, UINT8_MAX, UINT8_MAX, UINT8_MAX);
59
60         /*
61          * RTE_LPM_VALID_EXT_ENTRY_BITMASK for 2 LPM entries
62          * as one 64-bit value (0x0300000003000000).
63          */
64         const uint64_t mask_xv =
65                 ((uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK |
66                 (uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK << 32);
67
68         /*
69          * RTE_LPM_LOOKUP_SUCCESS for 2 LPM entries
70          * as one 64-bit value (0x0100000001000000).
71          */
72         const uint64_t mask_v =
73                 ((uint64_t)RTE_LPM_LOOKUP_SUCCESS |
74                 (uint64_t)RTE_LPM_LOOKUP_SUCCESS << 32);
75
76         /* get 4 indexes for tbl24[]. */
77         i24 = _mm_srli_epi32(ip, CHAR_BIT);
78
79         /* extract values from tbl24[] */
80         idx = _mm_cvtsi128_si64(i24);
81         /* With -O0 option, gcc 4.8 - 5.4 fails to fold sizeof() into a constant */
82         i24 = _mm_srli_si128(i24, /* sizeof(uint64_t) */ 8);
83
84         ptbl = (const uint32_t *)&lpm->tbl24[(uint32_t)idx];
85         tbl[0] = *ptbl;
86         ptbl = (const uint32_t *)&lpm->tbl24[idx >> 32];
87         tbl[1] = *ptbl;
88
89         idx = _mm_cvtsi128_si64(i24);
90
91         ptbl = (const uint32_t *)&lpm->tbl24[(uint32_t)idx];
92         tbl[2] = *ptbl;
93         ptbl = (const uint32_t *)&lpm->tbl24[idx >> 32];
94         tbl[3] = *ptbl;
95
96         /* get 4 indexes for tbl8[]. */
97         i8.x = _mm_and_si128(ip, mask8);
98
99         pt = (uint64_t)tbl[0] |
100                 (uint64_t)tbl[1] << 32;
101         pt2 = (uint64_t)tbl[2] |
102                 (uint64_t)tbl[3] << 32;
103
104         /* search successfully finished for all 4 IP addresses. */
105         if (likely((pt & mask_xv) == mask_v) &&
106                         likely((pt2 & mask_xv) == mask_v)) {
107                 *(uint64_t *)hop = pt & RTE_LPM_MASKX4_RES;
108                 *(uint64_t *)(hop + 2) = pt2 & RTE_LPM_MASKX4_RES;
109                 return;
110         }
111
112         if (unlikely((pt & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
113                         RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
114                 i8.u32[0] = i8.u32[0] +
115                         (uint8_t)tbl[0] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
116                 ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[0]];
117                 tbl[0] = *ptbl;
118         }
119         if (unlikely((pt >> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
120                         RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
121                 i8.u32[1] = i8.u32[1] +
122                         (uint8_t)tbl[1] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
123                 ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[1]];
124                 tbl[1] = *ptbl;
125         }
126         if (unlikely((pt2 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
127                         RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
128                 i8.u32[2] = i8.u32[2] +
129                         (uint8_t)tbl[2] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
130                 ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[2]];
131                 tbl[2] = *ptbl;
132         }
133         if (unlikely((pt2 >> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
134                         RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
135                 i8.u32[3] = i8.u32[3] +
136                         (uint8_t)tbl[3] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
137                 ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[3]];
138                 tbl[3] = *ptbl;
139         }
140
141         hop[0] = (tbl[0] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[0] & 0x00FFFFFF : defv;
142         hop[1] = (tbl[1] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[1] & 0x00FFFFFF : defv;
143         hop[2] = (tbl[2] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[2] & 0x00FFFFFF : defv;
144         hop[3] = (tbl[3] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[3] & 0x00FFFFFF : defv;
145 }
146
147 #ifdef __cplusplus
148 }
149 #endif
150
151 #endif /* _RTE_LPM_SSE_H_ */