34 #ifndef __INCLUDE_RTE_LRU_H__ 35 #define __INCLUDE_RTE_LRU_H__ 43 #ifdef __INTEL_COMPILER 44 #define GCC_VERSION (0) 46 #define GCC_VERSION (__GNUC__ * 10000+__GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__) 49 #ifndef RTE_TABLE_HASH_LRU_STRATEGY 51 #define RTE_TABLE_HASH_LRU_STRATEGY 2 53 #define RTE_TABLE_HASH_LRU_STRATEGY 1 57 #ifndef RTE_ARCH_X86_64 58 #undef RTE_TABLE_HASH_LRU_STRATEGY 59 #define RTE_TABLE_HASH_LRU_STRATEGY 1 62 #if (RTE_TABLE_HASH_LRU_STRATEGY < 0) || (RTE_TABLE_HASH_LRU_STRATEGY > 3) 63 #error Invalid value for RTE_TABLE_HASH_LRU_STRATEGY 66 #if RTE_TABLE_HASH_LRU_STRATEGY == 0 68 #define lru_init(bucket) \ 73 #define lru_pos(bucket) (bucket->lru_list & 0xFFFFLLU) 75 #define lru_update(bucket, mru_val) \ 81 #elif RTE_TABLE_HASH_LRU_STRATEGY == 1 83 #define lru_init(bucket) \ 85 bucket->lru_list = 0x0000000100020003LLU; \ 88 #define lru_pos(bucket) (bucket->lru_list & 0xFFFFLLU) 90 #define lru_update(bucket, mru_val) \ 92 uint64_t x, pos, x0, x1, x2, mask; \ 94 x = bucket->lru_list; \ 97 if ((x >> 48) == ((uint64_t) mru_val)) \ 100 if (((x >> 32) & 0xFFFFLLU) == ((uint64_t) mru_val)) \ 103 if (((x >> 16) & 0xFFFFLLU) == ((uint64_t) mru_val)) \ 106 if ((x & 0xFFFFLLU) == ((uint64_t) mru_val)) \ 111 mask = (~0LLU) << pos; \ 113 x1 = (x >> 16) & mask; \ 114 x2 = (x << (48 - pos)) & (0xFFFFLLU << 48); \ 118 bucket->lru_list = x; \ 121 #elif RTE_TABLE_HASH_LRU_STRATEGY == 2 123 #if GCC_VERSION > 40306 124 #include <x86intrin.h> 126 #include <emmintrin.h> 127 #include <smmintrin.h> 128 #include <xmmintrin.h> 131 #define lru_init(bucket) \ 133 bucket->lru_list = 0x0000000100020003LLU; \ 136 #define lru_pos(bucket) (bucket->lru_list & 0xFFFFLLU) 138 #define lru_update(bucket, mru_val) \ 141 static uint64_t masks[10] = { \ 143 0x0100070605040302, 0x8080808080808080, \ 144 0x0302070605040100, 0x8080808080808080, \ 145 0x0504070603020100, 0x8080808080808080, \ 146 0x0706050403020100, 0x8080808080808080, \ 147 0x0706050403020100, 0x8080808080808080}; \ 149 uint64_t mru2 = mru_val; \ 150 uint64_t mru3 = mru2 | (mru2 << 16); \ 151 uint64_t lru = bucket->lru_list; \ 153 uint64_t mru = lru ^ ((mru3 << 32) | mru3); \ 154 __m128i c = _mm_cvtsi64_si128(mru); \ 155 __m128i b = _mm_cvtsi64_si128(lru); \ 157 __m128i d = _mm_minpos_epu16(c); \ 159 unsigned pos = _mm_extract_epi16(d, 1); \ 161 __m128i k = _mm_shuffle_epi8(b, *((__m128i *) &masks[2 * pos]));\ 163 bucket->lru_list = _mm_extract_epi64(k, 0); \ 167 #elif RTE_TABLE_HASH_LRU_STRATEGY == 3 169 #if GCC_VERSION > 40306 170 #include <x86intrin.h> 172 #include <emmintrin.h> 173 #include <smmintrin.h> 174 #include <xmmintrin.h> 177 #define lru_init(bucket) \ 179 bucket->lru_list = ~0LLU; \ 184 f_lru_pos(uint64_t lru_list)
186 __m128i lst = _mm_set_epi64x((uint64_t)-1, lru_list);
187 __m128i min = _mm_minpos_epu16(lst);
188 return _mm_extract_epi16(min, 1);
190 #define lru_pos(bucket) f_lru_pos(bucket->lru_list) 192 #define lru_update(bucket, mru_val) \ 194 const uint64_t orvals[] = {0xFFFFLLU, 0xFFFFLLU << 16, \ 195 0xFFFFLLU << 32, 0xFFFFLLU << 48, 0LLU}; \ 196 const uint64_t decs[] = {0x1000100010001LLU, 0}; \ 197 __m128i lru = _mm_cvtsi64_si128(bucket->lru_list); \ 198 __m128i vdec = _mm_cvtsi64_si128(decs[mru_val>>2]); \ 199 lru = _mm_subs_epu16(lru, vdec); \ 200 bucket->lru_list = _mm_extract_epi64(lru, 0) | orvals[mru_val]; \ 205 #error "Incorrect value for RTE_TABLE_HASH_LRU_STRATEGY"