- /*
- * RTE_LPM_VALID_EXT_ENTRY_BITMASK for 4 LPM entries
- * as one 64-bit value (0x0300030003000300).
- */
- const uint64_t mask_xv =
- ((uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK |
- (uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK << 16 |
- (uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK << 32 |
- (uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK << 48);
-
- /*
- * RTE_LPM_LOOKUP_SUCCESS for 4 LPM entries
- * as one 64-bit value (0x0100010001000100).
- */
- const uint64_t mask_v =
- ((uint64_t)RTE_LPM_LOOKUP_SUCCESS |
- (uint64_t)RTE_LPM_LOOKUP_SUCCESS << 16 |
- (uint64_t)RTE_LPM_LOOKUP_SUCCESS << 32 |
- (uint64_t)RTE_LPM_LOOKUP_SUCCESS << 48);
-
- /* get 4 indexes for tbl24[]. */
- i24 = _mm_srli_epi32(ip, CHAR_BIT);
-
- /* extract values from tbl24[] */
- idx = _mm_cvtsi128_si64(i24);
- i24 = _mm_srli_si128(i24, sizeof(uint64_t));
-
- tbl[0] = *(const uint16_t *)&lpm->tbl24[(uint32_t)idx];
- tbl[1] = *(const uint16_t *)&lpm->tbl24[idx >> 32];
-
- idx = _mm_cvtsi128_si64(i24);
-
- tbl[2] = *(const uint16_t *)&lpm->tbl24[(uint32_t)idx];
- tbl[3] = *(const uint16_t *)&lpm->tbl24[idx >> 32];
-
- /* get 4 indexes for tbl8[]. */
- i8.m = _mm_and_si128(ip, mask8);
-
- pt = (uint64_t)tbl[0] |
- (uint64_t)tbl[1] << 16 |
- (uint64_t)tbl[2] << 32 |
- (uint64_t)tbl[3] << 48;
-
- /* search successfully finished for all 4 IP addresses. */
- if (likely((pt & mask_xv) == mask_v)) {
- uintptr_t ph = (uintptr_t)hop;
- *(uint64_t *)ph = pt & 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;
- tbl[0] = *(const uint16_t *)&lpm->tbl8[i8.u32[0]];
- }
- if (unlikely((pt >> 16 & 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;
- tbl[1] = *(const uint16_t *)&lpm->tbl8[i8.u32[1]];
- }
- if (unlikely((pt >> 32 & 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;
- tbl[2] = *(const uint16_t *)&lpm->tbl8[i8.u32[2]];
- }
- if (unlikely((pt >> 48 & 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;
- tbl[3] = *(const uint16_t *)&lpm->tbl8[i8.u32[3]];
- }
-
- hop[0] = (tbl[0] & RTE_LPM_LOOKUP_SUCCESS) ? (uint8_t)tbl[0] : defv;
- hop[1] = (tbl[1] & RTE_LPM_LOOKUP_SUCCESS) ? (uint8_t)tbl[1] : defv;
- hop[2] = (tbl[2] & RTE_LPM_LOOKUP_SUCCESS) ? (uint8_t)tbl[2] : defv;
- hop[3] = (tbl[3] & RTE_LPM_LOOKUP_SUCCESS) ? (uint8_t)tbl[3] : defv;
-}