34 #ifndef __INCLUDE_RTE_LRU_X86_H__ 35 #define __INCLUDE_RTE_LRU_X86_H__ 43 #include <rte_config.h> 45 #ifndef RTE_TABLE_HASH_LRU_STRATEGY 46 #define RTE_TABLE_HASH_LRU_STRATEGY 2 49 #if RTE_TABLE_HASH_LRU_STRATEGY == 2 51 #if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION > 40306) 52 #include <x86intrin.h> 54 #include <emmintrin.h> 55 #include <smmintrin.h> 56 #include <xmmintrin.h> 59 #define lru_init(bucket) \ 60 { bucket->lru_list = 0x0000000100020003LLU; } 62 #define lru_pos(bucket) (bucket->lru_list & 0xFFFFLLU) 64 #define lru_update(bucket, mru_val) \ 67 static uint64_t masks[10] = { \ 69 0x0100070605040302, 0x8080808080808080, \ 70 0x0302070605040100, 0x8080808080808080, \ 71 0x0504070603020100, 0x8080808080808080, \ 72 0x0706050403020100, 0x8080808080808080, \ 73 0x0706050403020100, 0x8080808080808080}; \ 75 uint64_t mru2 = mru_val; \ 76 uint64_t mru3 = mru2 | (mru2 << 16); \ 77 uint64_t lru = bucket->lru_list; \ 79 uint64_t mru = lru ^ ((mru3 << 32) | mru3); \ 80 __m128i c = _mm_cvtsi64_si128(mru); \ 81 __m128i b = _mm_cvtsi64_si128(lru); \ 83 __m128i d = _mm_minpos_epu16(c); \ 85 unsigned int pos = _mm_extract_epi16(d, 1); \ 87 __m128i k = _mm_shuffle_epi8(b, *((__m128i *) &masks[2 * pos]));\ 89 bucket->lru_list = _mm_extract_epi64(k, 0); \ 93 #elif RTE_TABLE_HASH_LRU_STRATEGY == 3 95 #if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION > 40306) 96 #include <x86intrin.h> 98 #include <emmintrin.h> 99 #include <smmintrin.h> 100 #include <xmmintrin.h> 103 #define lru_init(bucket) \ 104 { bucket->lru_list = ~0LLU; } 107 f_lru_pos(uint64_t lru_list)
109 __m128i lst = _mm_set_epi64x((uint64_t)-1, lru_list);
110 __m128i min = _mm_minpos_epu16(lst);
111 return _mm_extract_epi16(min, 1);
113 #define lru_pos(bucket) f_lru_pos(bucket->lru_list) 115 #define lru_update(bucket, mru_val) \ 117 const uint64_t orvals[] = {0xFFFFLLU, 0xFFFFLLU << 16, \ 118 0xFFFFLLU << 32, 0xFFFFLLU << 48, 0LLU}; \ 119 const uint64_t decs[] = {0x1000100010001LLU, 0}; \ 120 __m128i lru = _mm_cvtsi64_si128(bucket->lru_list); \ 121 __m128i vdec = _mm_cvtsi64_si128(decs[mru_val>>2]); \ 122 lru = _mm_subs_epu16(lru, vdec); \ 123 bucket->lru_list = _mm_extract_epi64(lru, 0) | orvals[mru_val]; \