8e3cb36d5b
Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
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* SPDX-License-Identifier: BSD-3-Clause
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* Copyright (C) IBM Corporation 2016.
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*/
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#ifndef _RTE_LPM_ALTIVEC_H_
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#define _RTE_LPM_ALTIVEC_H_
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#include <rte_branch_prediction.h>
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#include <rte_byteorder.h>
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#include <rte_common.h>
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#include <rte_vect.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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static inline void
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rte_lpm_lookupx4(const struct rte_lpm *lpm, xmm_t ip, uint32_t hop[4],
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uint32_t defv)
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{
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vector signed int i24;
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rte_xmm_t i8;
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uint32_t tbl[4];
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uint64_t idx, pt, pt2;
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const uint32_t *ptbl;
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const uint32_t mask = UINT8_MAX;
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const vector signed int mask8 = (xmm_t){mask, mask, mask, mask};
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/*
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* RTE_LPM_VALID_EXT_ENTRY_BITMASK for 2 LPM entries
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* as one 64-bit value (0x0300000003000000).
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*/
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const uint64_t mask_xv =
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((uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK |
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(uint64_t)RTE_LPM_VALID_EXT_ENTRY_BITMASK << 32);
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/*
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* RTE_LPM_LOOKUP_SUCCESS for 2 LPM entries
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* as one 64-bit value (0x0100000001000000).
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*/
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const uint64_t mask_v =
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((uint64_t)RTE_LPM_LOOKUP_SUCCESS |
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(uint64_t)RTE_LPM_LOOKUP_SUCCESS << 32);
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/* get 4 indexes for tbl24[]. */
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i24 = vec_sr((xmm_t) ip,
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(vector unsigned int){CHAR_BIT, CHAR_BIT, CHAR_BIT, CHAR_BIT});
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/* extract values from tbl24[] */
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idx = (uint32_t)i24[0];
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idx = idx < (1<<24) ? idx : (1<<24)-1;
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ptbl = (const uint32_t *)&lpm->tbl24[idx];
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tbl[0] = *ptbl;
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idx = (uint32_t) i24[1];
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idx = idx < (1<<24) ? idx : (1<<24)-1;
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ptbl = (const uint32_t *)&lpm->tbl24[idx];
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tbl[1] = *ptbl;
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idx = (uint32_t) i24[2];
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idx = idx < (1<<24) ? idx : (1<<24)-1;
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ptbl = (const uint32_t *)&lpm->tbl24[idx];
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tbl[2] = *ptbl;
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idx = (uint32_t) i24[3];
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idx = idx < (1<<24) ? idx : (1<<24)-1;
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ptbl = (const uint32_t *)&lpm->tbl24[idx];
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tbl[3] = *ptbl;
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/* get 4 indexes for tbl8[]. */
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i8.x = vec_and(ip, mask8);
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pt = (uint64_t)tbl[0] |
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(uint64_t)tbl[1] << 32;
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pt2 = (uint64_t)tbl[2] |
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(uint64_t)tbl[3] << 32;
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/* search successfully finished for all 4 IP addresses. */
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if (likely((pt & mask_xv) == mask_v) &&
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likely((pt2 & mask_xv) == mask_v)) {
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*(uint64_t *)hop = pt & RTE_LPM_MASKX4_RES;
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*(uint64_t *)(hop + 2) = pt2 & RTE_LPM_MASKX4_RES;
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return;
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}
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if (unlikely((pt & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
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RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
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i8.u32[0] = i8.u32[0] +
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(uint8_t)tbl[0] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
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ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[0]];
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tbl[0] = *ptbl;
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}
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if (unlikely((pt >> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
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RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
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i8.u32[1] = i8.u32[1] +
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(uint8_t)tbl[1] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
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ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[1]];
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tbl[1] = *ptbl;
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}
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if (unlikely((pt2 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
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RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
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i8.u32[2] = i8.u32[2] +
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(uint8_t)tbl[2] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
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ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[2]];
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tbl[2] = *ptbl;
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}
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if (unlikely((pt2 >> 32 & RTE_LPM_VALID_EXT_ENTRY_BITMASK) ==
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RTE_LPM_VALID_EXT_ENTRY_BITMASK)) {
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i8.u32[3] = i8.u32[3] +
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(uint8_t)tbl[3] * RTE_LPM_TBL8_GROUP_NUM_ENTRIES;
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ptbl = (const uint32_t *)&lpm->tbl8[i8.u32[3]];
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tbl[3] = *ptbl;
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}
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hop[0] = (tbl[0] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[0] & 0x00FFFFFF : defv;
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hop[1] = (tbl[1] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[1] & 0x00FFFFFF : defv;
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hop[2] = (tbl[2] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[2] & 0x00FFFFFF : defv;
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hop[3] = (tbl[3] & RTE_LPM_LOOKUP_SUCCESS) ? tbl[3] & 0x00FFFFFF : defv;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RTE_LPM_ALTIVEC_H_ */
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