lib/table/rte_lru.h - main - phprus/github_dpdk

lib/table/rte_lru.h
85 строк2 KB
Bruce Richardson
table: fix variable shadowing
20 янв 2026, 10:57
20 янв 2026, 10:5799c3958
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */

#ifndef __INCLUDE_RTE_LRU_H__
#define __INCLUDE_RTE_LRU_H__

#include <rte_config.h>
#ifdef RTE_ARCH_X86_64
#include "rte_lru_x86.h"
#elif defined(RTE_ARCH_ARM64)
#include "rte_lru_arm64.h"
#else
#undef RTE_TABLE_HASH_LRU_STRATEGY
#define RTE_TABLE_HASH_LRU_STRATEGY                        1
#endif

#if RTE_TABLE_HASH_LRU_STRATEGY == 0

#define lru_init(bucket)						\
do									\
	bucket = bucket;						\
while (0)

#define lru_pos(bucket) (bucket->lru_list & 0xFFFFLLU)

#define lru_update(bucket, mru_val)					\
do {									\
	bucket = bucket;						\
	mru_val = mru_val;						\
} while (0)

#elif RTE_TABLE_HASH_LRU_STRATEGY == 1

#define lru_init(bucket)						\
do									\
	bucket->lru_list = 0x0000000100020003LLU;			\
while (0)

#define lru_pos(bucket) (bucket->lru_list & 0xFFFFLLU)

#define lru_update(bucket, mru_val)					\
do {									\
	uint64_t _x, _pos, _x0, _x1, _x2, _mask;			\
									\
	_x = bucket->lru_list;						\
									\
	_pos = 4;							\
	if ((_x >> 48) == ((uint64_t) mru_val))			\
		_pos = 3;						\
									\
	if (((_x >> 32) & 0xFFFFLLU) == ((uint64_t) mru_val))		\
		_pos = 2;						\
									\
	if (((_x >> 16) & 0xFFFFLLU) == ((uint64_t) mru_val))		\
		_pos = 1;						\
									\
	if ((_x & 0xFFFFLLU) == ((uint64_t) mru_val))			\
		_pos = 0;						\
									\
									\
	_pos <<= 4;							\
	_mask = (~0LLU) << _pos;					\
	_x0 = _x & (~_mask);						\
	_x1 = (_x >> 16) & _mask;					\
	_x2 = (_x << (48 - _pos)) & (0xFFFFLLU << 48);			\
	_x = _x0 | _x1 | _x2;						\
									\
	if (_pos != 64)							\
		bucket->lru_list = _x;					\
} while (0)

#elif (RTE_TABLE_HASH_LRU_STRATEGY == 2) || (RTE_TABLE_HASH_LRU_STRATEGY == 3)

/**
 * These strategies are implemented in architecture specific header files.
 */

#else

#error "Incorrect value for RTE_TABLE_HASH_LRU_STRATEGY"

#endif

#endif