diff options
Diffstat (limited to 'deps/jemalloc/include/jemalloc/internal/hash.h')
| -rw-r--r-- | deps/jemalloc/include/jemalloc/internal/hash.h | 318 |
1 files changed, 0 insertions, 318 deletions
diff --git a/deps/jemalloc/include/jemalloc/internal/hash.h b/deps/jemalloc/include/jemalloc/internal/hash.h deleted file mode 100644 index dcfc992df..000000000 --- a/deps/jemalloc/include/jemalloc/internal/hash.h +++ /dev/null @@ -1,318 +0,0 @@ -#ifndef JEMALLOC_INTERNAL_HASH_H -#define JEMALLOC_INTERNAL_HASH_H - -#include "jemalloc/internal/assert.h" - -/* - * The following hash function is based on MurmurHash3, placed into the public - * domain by Austin Appleby. See https://github.com/aappleby/smhasher for - * details. - */ - -/******************************************************************************/ -/* Internal implementation. */ -static inline uint32_t -hash_rotl_32(uint32_t x, int8_t r) { - return ((x << r) | (x >> (32 - r))); -} - -static inline uint64_t -hash_rotl_64(uint64_t x, int8_t r) { - return ((x << r) | (x >> (64 - r))); -} - -static inline uint32_t -hash_get_block_32(const uint32_t *p, int i) { - /* Handle unaligned read. */ - if (unlikely((uintptr_t)p & (sizeof(uint32_t)-1)) != 0) { - uint32_t ret; - - memcpy(&ret, (uint8_t *)(p + i), sizeof(uint32_t)); - return ret; - } - - return p[i]; -} - -static inline uint64_t -hash_get_block_64(const uint64_t *p, int i) { - /* Handle unaligned read. */ - if (unlikely((uintptr_t)p & (sizeof(uint64_t)-1)) != 0) { - uint64_t ret; - - memcpy(&ret, (uint8_t *)(p + i), sizeof(uint64_t)); - return ret; - } - - return p[i]; -} - -static inline uint32_t -hash_fmix_32(uint32_t h) { - h ^= h >> 16; - h *= 0x85ebca6b; - h ^= h >> 13; - h *= 0xc2b2ae35; - h ^= h >> 16; - - return h; -} - -static inline uint64_t -hash_fmix_64(uint64_t k) { - k ^= k >> 33; - k *= KQU(0xff51afd7ed558ccd); - k ^= k >> 33; - k *= KQU(0xc4ceb9fe1a85ec53); - k ^= k >> 33; - - return k; -} - -static inline uint32_t -hash_x86_32(const void *key, int len, uint32_t seed) { - const uint8_t *data = (const uint8_t *) key; - const int nblocks = len / 4; - - uint32_t h1 = seed; - - const uint32_t c1 = 0xcc9e2d51; - const uint32_t c2 = 0x1b873593; - - /* body */ - { - const uint32_t *blocks = (const uint32_t *) (data + nblocks*4); - int i; - - for (i = -nblocks; i; i++) { - uint32_t k1 = hash_get_block_32(blocks, i); - - k1 *= c1; - k1 = hash_rotl_32(k1, 15); - k1 *= c2; - - h1 ^= k1; - h1 = hash_rotl_32(h1, 13); - h1 = h1*5 + 0xe6546b64; - } - } - - /* tail */ - { - const uint8_t *tail = (const uint8_t *) (data + nblocks*4); - - uint32_t k1 = 0; - - switch (len & 3) { - case 3: k1 ^= tail[2] << 16; - case 2: k1 ^= tail[1] << 8; - case 1: k1 ^= tail[0]; k1 *= c1; k1 = hash_rotl_32(k1, 15); - k1 *= c2; h1 ^= k1; - } - } - - /* finalization */ - h1 ^= len; - - h1 = hash_fmix_32(h1); - - return h1; -} - -UNUSED static inline void -hash_x86_128(const void *key, const int len, uint32_t seed, - uint64_t r_out[2]) { - const uint8_t * data = (const uint8_t *) key; - const int nblocks = len / 16; - - uint32_t h1 = seed; - uint32_t h2 = seed; - uint32_t h3 = seed; - uint32_t h4 = seed; - - const uint32_t c1 = 0x239b961b; - const uint32_t c2 = 0xab0e9789; - const uint32_t c3 = 0x38b34ae5; - const uint32_t c4 = 0xa1e38b93; - - /* body */ - { - const uint32_t *blocks = (const uint32_t *) (data + nblocks*16); - int i; - - for (i = -nblocks; i; i++) { - uint32_t k1 = hash_get_block_32(blocks, i*4 + 0); - uint32_t k2 = hash_get_block_32(blocks, i*4 + 1); - uint32_t k3 = hash_get_block_32(blocks, i*4 + 2); - uint32_t k4 = hash_get_block_32(blocks, i*4 + 3); - - k1 *= c1; k1 = hash_rotl_32(k1, 15); k1 *= c2; h1 ^= k1; - - h1 = hash_rotl_32(h1, 19); h1 += h2; - h1 = h1*5 + 0x561ccd1b; - - k2 *= c2; k2 = hash_rotl_32(k2, 16); k2 *= c3; h2 ^= k2; - - h2 = hash_rotl_32(h2, 17); h2 += h3; - h2 = h2*5 + 0x0bcaa747; - - k3 *= c3; k3 = hash_rotl_32(k3, 17); k3 *= c4; h3 ^= k3; - - h3 = hash_rotl_32(h3, 15); h3 += h4; - h3 = h3*5 + 0x96cd1c35; - - k4 *= c4; k4 = hash_rotl_32(k4, 18); k4 *= c1; h4 ^= k4; - - h4 = hash_rotl_32(h4, 13); h4 += h1; - h4 = h4*5 + 0x32ac3b17; - } - } - - /* tail */ - { - const uint8_t *tail = (const uint8_t *) (data + nblocks*16); - uint32_t k1 = 0; - uint32_t k2 = 0; - uint32_t k3 = 0; - uint32_t k4 = 0; - - switch (len & 15) { - case 15: k4 ^= tail[14] << 16; - case 14: k4 ^= tail[13] << 8; - case 13: k4 ^= tail[12] << 0; - k4 *= c4; k4 = hash_rotl_32(k4, 18); k4 *= c1; h4 ^= k4; - - case 12: k3 ^= tail[11] << 24; - case 11: k3 ^= tail[10] << 16; - case 10: k3 ^= tail[ 9] << 8; - case 9: k3 ^= tail[ 8] << 0; - k3 *= c3; k3 = hash_rotl_32(k3, 17); k3 *= c4; h3 ^= k3; - - case 8: k2 ^= tail[ 7] << 24; - case 7: k2 ^= tail[ 6] << 16; - case 6: k2 ^= tail[ 5] << 8; - case 5: k2 ^= tail[ 4] << 0; - k2 *= c2; k2 = hash_rotl_32(k2, 16); k2 *= c3; h2 ^= k2; - - case 4: k1 ^= tail[ 3] << 24; - case 3: k1 ^= tail[ 2] << 16; - case 2: k1 ^= tail[ 1] << 8; - case 1: k1 ^= tail[ 0] << 0; - k1 *= c1; k1 = hash_rotl_32(k1, 15); k1 *= c2; h1 ^= k1; - } - } - - /* finalization */ - h1 ^= len; h2 ^= len; h3 ^= len; h4 ^= len; - - h1 += h2; h1 += h3; h1 += h4; - h2 += h1; h3 += h1; h4 += h1; - - h1 = hash_fmix_32(h1); - h2 = hash_fmix_32(h2); - h3 = hash_fmix_32(h3); - h4 = hash_fmix_32(h4); - - h1 += h2; h1 += h3; h1 += h4; - h2 += h1; h3 += h1; h4 += h1; - - r_out[0] = (((uint64_t) h2) << 32) | h1; - r_out[1] = (((uint64_t) h4) << 32) | h3; -} - -UNUSED static inline void -hash_x64_128(const void *key, const int len, const uint32_t seed, - uint64_t r_out[2]) { - const uint8_t *data = (const uint8_t *) key; - const int nblocks = len / 16; - - uint64_t h1 = seed; - uint64_t h2 = seed; - - const uint64_t c1 = KQU(0x87c37b91114253d5); - const uint64_t c2 = KQU(0x4cf5ad432745937f); - - /* body */ - { - const uint64_t *blocks = (const uint64_t *) (data); - int i; - - for (i = 0; i < nblocks; i++) { - uint64_t k1 = hash_get_block_64(blocks, i*2 + 0); - uint64_t k2 = hash_get_block_64(blocks, i*2 + 1); - - k1 *= c1; k1 = hash_rotl_64(k1, 31); k1 *= c2; h1 ^= k1; - - h1 = hash_rotl_64(h1, 27); h1 += h2; - h1 = h1*5 + 0x52dce729; - - k2 *= c2; k2 = hash_rotl_64(k2, 33); k2 *= c1; h2 ^= k2; - - h2 = hash_rotl_64(h2, 31); h2 += h1; - h2 = h2*5 + 0x38495ab5; - } - } - - /* tail */ - { - const uint8_t *tail = (const uint8_t*)(data + nblocks*16); - uint64_t k1 = 0; - uint64_t k2 = 0; - - switch (len & 15) { - case 15: k2 ^= ((uint64_t)(tail[14])) << 48; /* falls through */ - case 14: k2 ^= ((uint64_t)(tail[13])) << 40; /* falls through */ - case 13: k2 ^= ((uint64_t)(tail[12])) << 32; /* falls through */ - case 12: k2 ^= ((uint64_t)(tail[11])) << 24; /* falls through */ - case 11: k2 ^= ((uint64_t)(tail[10])) << 16; /* falls through */ - case 10: k2 ^= ((uint64_t)(tail[ 9])) << 8; /* falls through */ - case 9: k2 ^= ((uint64_t)(tail[ 8])) << 0; - k2 *= c2; k2 = hash_rotl_64(k2, 33); k2 *= c1; h2 ^= k2; - /* falls through */ - case 8: k1 ^= ((uint64_t)(tail[ 7])) << 56; /* falls through */ - case 7: k1 ^= ((uint64_t)(tail[ 6])) << 48; /* falls through */ - case 6: k1 ^= ((uint64_t)(tail[ 5])) << 40; /* falls through */ - case 5: k1 ^= ((uint64_t)(tail[ 4])) << 32; /* falls through */ - case 4: k1 ^= ((uint64_t)(tail[ 3])) << 24; /* falls through */ - case 3: k1 ^= ((uint64_t)(tail[ 2])) << 16; /* falls through */ - case 2: k1 ^= ((uint64_t)(tail[ 1])) << 8; /* falls through */ - case 1: k1 ^= ((uint64_t)(tail[ 0])) << 0; - k1 *= c1; k1 = hash_rotl_64(k1, 31); k1 *= c2; h1 ^= k1; - } - } - - /* finalization */ - h1 ^= len; h2 ^= len; - - h1 += h2; - h2 += h1; - - h1 = hash_fmix_64(h1); - h2 = hash_fmix_64(h2); - - h1 += h2; - h2 += h1; - - r_out[0] = h1; - r_out[1] = h2; -} - -/******************************************************************************/ -/* API. */ -static inline void -hash(const void *key, size_t len, const uint32_t seed, size_t r_hash[2]) { - assert(len <= INT_MAX); /* Unfortunate implementation limitation. */ - -#if (LG_SIZEOF_PTR == 3 && !defined(JEMALLOC_BIG_ENDIAN)) - hash_x64_128(key, (int)len, seed, (uint64_t *)r_hash); -#else - { - uint64_t hashes[2]; - hash_x86_128(key, (int)len, seed, hashes); - r_hash[0] = (size_t)hashes[0]; - r_hash[1] = (size_t)hashes[1]; - } -#endif -} - -#endif /* JEMALLOC_INTERNAL_HASH_H */ |