2 * SPDX-License-Identifier: BSD-3-Clause
3 * Copyright (C) IBM Corporation 2016.
6 #ifndef _RTE_LPM_ALTIVEC_H_
7 #define _RTE_LPM_ALTIVEC_H_
9 #include <rte_branch_prediction.h>
10 #include <rte_byteorder.h>
11 #include <rte_common.h>
19 rte_lpm_lookupx4(const struct rte_lpm
*lpm
, xmm_t ip
, uint32_t hop
[4],
22 vector
signed int i24
;
25 uint64_t idx
, pt
, pt2
;
28 const uint32_t mask
= UINT8_MAX
;
29 const vector
signed int mask8
= (xmm_t
){mask
, mask
, mask
, mask
};
32 * RTE_LPM_VALID_EXT_ENTRY_BITMASK for 2 LPM entries
33 * as one 64-bit value (0x0300000003000000).
35 const uint64_t mask_xv
=
36 ((uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK
|
37 (uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK
<< 32);
40 * RTE_LPM_LOOKUP_SUCCESS for 2 LPM entries
41 * as one 64-bit value (0x0100000001000000).
43 const uint64_t mask_v
=
44 ((uint64_t)RTE_LPM_LOOKUP_SUCCESS
|
45 (uint64_t)RTE_LPM_LOOKUP_SUCCESS
<< 32);
47 /* get 4 indexes for tbl24[]. */
48 i24
= vec_sr((xmm_t
) ip
,
49 (vector
unsigned int){CHAR_BIT
, CHAR_BIT
, CHAR_BIT
, CHAR_BIT
});
51 /* extract values from tbl24[] */
52 idx
= (uint32_t)i24
[0];
53 idx
= idx
< (1<<24) ? idx
: (1<<24)-1;
54 ptbl
= (const uint32_t *)&lpm
->tbl24
[idx
];
57 idx
= (uint32_t) i24
[1];
58 idx
= idx
< (1<<24) ? idx
: (1<<24)-1;
59 ptbl
= (const uint32_t *)&lpm
->tbl24
[idx
];
62 idx
= (uint32_t) i24
[2];
63 idx
= idx
< (1<<24) ? idx
: (1<<24)-1;
64 ptbl
= (const uint32_t *)&lpm
->tbl24
[idx
];
67 idx
= (uint32_t) i24
[3];
68 idx
= idx
< (1<<24) ? idx
: (1<<24)-1;
69 ptbl
= (const uint32_t *)&lpm
->tbl24
[idx
];
72 /* get 4 indexes for tbl8[]. */
73 i8
.x
= vec_and(ip
, mask8
);
75 pt
= (uint64_t)tbl
[0] |
76 (uint64_t)tbl
[1] << 32;
77 pt2
= (uint64_t)tbl
[2] |
78 (uint64_t)tbl
[3] << 32;
80 /* search successfully finished for all 4 IP addresses. */
81 if (likely((pt
& mask_xv
) == mask_v
) &&
82 likely((pt2
& mask_xv
) == mask_v
)) {
83 *(uint64_t *)hop
= pt
& RTE_LPM_MASKX4_RES
;
84 *(uint64_t *)(hop
+ 2) = pt2
& RTE_LPM_MASKX4_RES
;
88 if (unlikely((pt
& RTE_LPM_VALID_EXT_ENTRY_BITMASK
) ==
89 RTE_LPM_VALID_EXT_ENTRY_BITMASK
)) {
90 i8
.u32
[0] = i8
.u32
[0] +
91 (uint8_t)tbl
[0] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES
;
92 ptbl
= (const uint32_t *)&lpm
->tbl8
[i8
.u32
[0]];
95 if (unlikely((pt
>> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK
) ==
96 RTE_LPM_VALID_EXT_ENTRY_BITMASK
)) {
97 i8
.u32
[1] = i8
.u32
[1] +
98 (uint8_t)tbl
[1] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES
;
99 ptbl
= (const uint32_t *)&lpm
->tbl8
[i8
.u32
[1]];
102 if (unlikely((pt2
& RTE_LPM_VALID_EXT_ENTRY_BITMASK
) ==
103 RTE_LPM_VALID_EXT_ENTRY_BITMASK
)) {
104 i8
.u32
[2] = i8
.u32
[2] +
105 (uint8_t)tbl
[2] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES
;
106 ptbl
= (const uint32_t *)&lpm
->tbl8
[i8
.u32
[2]];
109 if (unlikely((pt2
>> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK
) ==
110 RTE_LPM_VALID_EXT_ENTRY_BITMASK
)) {
111 i8
.u32
[3] = i8
.u32
[3] +
112 (uint8_t)tbl
[3] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES
;
113 ptbl
= (const uint32_t *)&lpm
->tbl8
[i8
.u32
[3]];
117 hop
[0] = (tbl
[0] & RTE_LPM_LOOKUP_SUCCESS
) ? tbl
[0] & 0x00FFFFFF : defv
;
118 hop
[1] = (tbl
[1] & RTE_LPM_LOOKUP_SUCCESS
) ? tbl
[1] & 0x00FFFFFF : defv
;
119 hop
[2] = (tbl
[2] & RTE_LPM_LOOKUP_SUCCESS
) ? tbl
[2] & 0x00FFFFFF : defv
;
120 hop
[3] = (tbl
[3] & RTE_LPM_LOOKUP_SUCCESS
) ? tbl
[3] & 0x00FFFFFF : defv
;
127 #endif /* _RTE_LPM_ALTIVEC_H_ */