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34 #ifndef _RTE_LPM_SSE_H_
35 #define _RTE_LPM_SSE_H_
37 #include <rte_branch_prediction.h>
38 #include <rte_byteorder.h>
39 #include <rte_common.h>
48 rte_lpm_lookupx4(const struct rte_lpm
*lpm
, xmm_t ip
, uint32_t hop
[4],
54 uint64_t idx
, pt
, pt2
;
58 _mm_set_epi32(UINT8_MAX
, UINT8_MAX
, UINT8_MAX
, UINT8_MAX
);
61 * RTE_LPM_VALID_EXT_ENTRY_BITMASK for 2 LPM entries
62 * as one 64-bit value (0x0300000003000000).
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);
69 * RTE_LPM_LOOKUP_SUCCESS for 2 LPM entries
70 * as one 64-bit value (0x0100000001000000).
72 const uint64_t mask_v
=
73 ((uint64_t)RTE_LPM_LOOKUP_SUCCESS
|
74 (uint64_t)RTE_LPM_LOOKUP_SUCCESS
<< 32);
76 /* get 4 indexes for tbl24[]. */
77 i24
= _mm_srli_epi32(ip
, CHAR_BIT
);
79 /* extract values from tbl24[] */
80 idx
= _mm_cvtsi128_si64(i24
);
81 i24
= _mm_srli_si128(i24
, sizeof(uint64_t));
83 ptbl
= (const uint32_t *)&lpm
->tbl24
[(uint32_t)idx
];
85 ptbl
= (const uint32_t *)&lpm
->tbl24
[idx
>> 32];
88 idx
= _mm_cvtsi128_si64(i24
);
90 ptbl
= (const uint32_t *)&lpm
->tbl24
[(uint32_t)idx
];
92 ptbl
= (const uint32_t *)&lpm
->tbl24
[idx
>> 32];
95 /* get 4 indexes for tbl8[]. */
96 i8
.x
= _mm_and_si128(ip
, mask8
);
98 pt
= (uint64_t)tbl
[0] |
99 (uint64_t)tbl
[1] << 32;
100 pt2
= (uint64_t)tbl
[2] |
101 (uint64_t)tbl
[3] << 32;
103 /* search successfully finished for all 4 IP addresses. */
104 if (likely((pt
& mask_xv
) == mask_v
) &&
105 likely((pt2
& mask_xv
) == mask_v
)) {
106 *(uint64_t *)hop
= pt
& RTE_LPM_MASKX4_RES
;
107 *(uint64_t *)(hop
+ 2) = pt2
& RTE_LPM_MASKX4_RES
;
111 if (unlikely((pt
& RTE_LPM_VALID_EXT_ENTRY_BITMASK
) ==
112 RTE_LPM_VALID_EXT_ENTRY_BITMASK
)) {
113 i8
.u32
[0] = i8
.u32
[0] +
114 (uint8_t)tbl
[0] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES
;
115 ptbl
= (const uint32_t *)&lpm
->tbl8
[i8
.u32
[0]];
118 if (unlikely((pt
>> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK
) ==
119 RTE_LPM_VALID_EXT_ENTRY_BITMASK
)) {
120 i8
.u32
[1] = i8
.u32
[1] +
121 (uint8_t)tbl
[1] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES
;
122 ptbl
= (const uint32_t *)&lpm
->tbl8
[i8
.u32
[1]];
125 if (unlikely((pt2
& RTE_LPM_VALID_EXT_ENTRY_BITMASK
) ==
126 RTE_LPM_VALID_EXT_ENTRY_BITMASK
)) {
127 i8
.u32
[2] = i8
.u32
[2] +
128 (uint8_t)tbl
[2] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES
;
129 ptbl
= (const uint32_t *)&lpm
->tbl8
[i8
.u32
[2]];
132 if (unlikely((pt2
>> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK
) ==
133 RTE_LPM_VALID_EXT_ENTRY_BITMASK
)) {
134 i8
.u32
[3] = i8
.u32
[3] +
135 (uint8_t)tbl
[3] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES
;
136 ptbl
= (const uint32_t *)&lpm
->tbl8
[i8
.u32
[3]];
140 hop
[0] = (tbl
[0] & RTE_LPM_LOOKUP_SUCCESS
) ? tbl
[0] & 0x00FFFFFF : defv
;
141 hop
[1] = (tbl
[1] & RTE_LPM_LOOKUP_SUCCESS
) ? tbl
[1] & 0x00FFFFFF : defv
;
142 hop
[2] = (tbl
[2] & RTE_LPM_LOOKUP_SUCCESS
) ? tbl
[2] & 0x00FFFFFF : defv
;
143 hop
[3] = (tbl
[3] & RTE_LPM_LOOKUP_SUCCESS
) ? tbl
[3] & 0x00FFFFFF : defv
;
150 #endif /* _RTE_LPM_SSE_H_ */