New upstream version 17.08

[deb_dpdk.git] / lib / librte_table / rte_lru.h

diff --git a/lib/librte_table/rte_lru.h b/lib/librte_table/rte_lru.h
index e87e062..93258ef 100644 (file)
--- 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