diff options
Diffstat (limited to 'lib/librte_table/rte_lru.h')
-rw-r--r-- | lib/librte_table/rte_lru.h | 108 |
1 files changed, 8 insertions, 100 deletions
diff --git a/lib/librte_table/rte_lru.h b/lib/librte_table/rte_lru.h index e87e062d..93258ef4 100644 --- a/lib/librte_table/rte_lru.h +++ b/lib/librte_table/rte_lru.h @@ -38,31 +38,15 @@ extern "C" { #endif -#include <stdint.h> - -#ifdef __INTEL_COMPILER -#define GCC_VERSION (0) +#ifdef RTE_ARCH_X86_64 +#include "rte_lru_x86.h" +#elif defined(RTE_ARCH_ARM64) +#include "rte_lru_arm64.h" #else -#define GCC_VERSION (__GNUC__ * 10000+__GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__) -#endif - -#ifndef RTE_TABLE_HASH_LRU_STRATEGY -#ifdef __SSE4_2__ -#define RTE_TABLE_HASH_LRU_STRATEGY 2 -#else /* if no SSE, use simple scalar version */ -#define RTE_TABLE_HASH_LRU_STRATEGY 1 -#endif -#endif - -#ifndef RTE_ARCH_X86_64 #undef RTE_TABLE_HASH_LRU_STRATEGY #define RTE_TABLE_HASH_LRU_STRATEGY 1 #endif -#if (RTE_TABLE_HASH_LRU_STRATEGY < 0) || (RTE_TABLE_HASH_LRU_STRATEGY > 3) -#error Invalid value for RTE_TABLE_HASH_LRU_STRATEGY -#endif - #if RTE_TABLE_HASH_LRU_STRATEGY == 0 #define lru_init(bucket) \ @@ -118,87 +102,11 @@ do { \ bucket->lru_list = x; \ } while (0) -#elif RTE_TABLE_HASH_LRU_STRATEGY == 2 - -#if GCC_VERSION > 40306 -#include <x86intrin.h> -#else -#include <emmintrin.h> -#include <smmintrin.h> -#include <xmmintrin.h> -#endif - -#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 { \ - /* set up the masks for all possible shuffles, depends on pos */\ - static uint64_t masks[10] = { \ - /* Shuffle order; Make Zero (see _mm_shuffle_epi8 manual) */\ - 0x0100070605040302, 0x8080808080808080, \ - 0x0302070605040100, 0x8080808080808080, \ - 0x0504070603020100, 0x8080808080808080, \ - 0x0706050403020100, 0x8080808080808080, \ - 0x0706050403020100, 0x8080808080808080}; \ - /* load up one register with repeats of mru-val */ \ - uint64_t mru2 = mru_val; \ - uint64_t mru3 = mru2 | (mru2 << 16); \ - uint64_t lru = bucket->lru_list; \ - /* XOR to cause the word we're looking for to go to zero */ \ - uint64_t mru = lru ^ ((mru3 << 32) | mru3); \ - __m128i c = _mm_cvtsi64_si128(mru); \ - __m128i b = _mm_cvtsi64_si128(lru); \ - /* Find the minimum value (first zero word, if it's in there) */\ - __m128i d = _mm_minpos_epu16(c); \ - /* Second word is the index to found word (first word is the value) */\ - unsigned pos = _mm_extract_epi16(d, 1); \ - /* move the recently used location to top of list */ \ - __m128i k = _mm_shuffle_epi8(b, *((__m128i *) &masks[2 * pos]));\ - /* Finally, update the original list with the reordered data */ \ - bucket->lru_list = _mm_extract_epi64(k, 0); \ - /* Phwew! */ \ -} while (0) - -#elif RTE_TABLE_HASH_LRU_STRATEGY == 3 +#elif (RTE_TABLE_HASH_LRU_STRATEGY == 2) || (RTE_TABLE_HASH_LRU_STRATEGY == 3) -#if GCC_VERSION > 40306 -#include <x86intrin.h> -#else -#include <emmintrin.h> -#include <smmintrin.h> -#include <xmmintrin.h> -#endif - -#define lru_init(bucket) \ -do \ - bucket->lru_list = ~0LLU; \ -while (0) - - -static inline int -f_lru_pos(uint64_t lru_list) -{ - __m128i lst = _mm_set_epi64x((uint64_t)-1, lru_list); - __m128i min = _mm_minpos_epu16(lst); - return _mm_extract_epi16(min, 1); -} -#define lru_pos(bucket) f_lru_pos(bucket->lru_list) - -#define lru_update(bucket, mru_val) \ -do { \ - const uint64_t orvals[] = {0xFFFFLLU, 0xFFFFLLU << 16, \ - 0xFFFFLLU << 32, 0xFFFFLLU << 48, 0LLU}; \ - const uint64_t decs[] = {0x1000100010001LLU, 0}; \ - __m128i lru = _mm_cvtsi64_si128(bucket->lru_list); \ - __m128i vdec = _mm_cvtsi64_si128(decs[mru_val>>2]); \ - lru = _mm_subs_epu16(lru, vdec); \ - bucket->lru_list = _mm_extract_epi64(lru, 0) | orvals[mru_val]; \ -} while (0) +/** + * These strategies are implemented in architecture specific header files. + */ #else |