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-rw-r--r--deps/jemalloc/include/jemalloc/internal/hash.h320
1 files changed, 320 insertions, 0 deletions
diff --git a/deps/jemalloc/include/jemalloc/internal/hash.h b/deps/jemalloc/include/jemalloc/internal/hash.h
new file mode 100644
index 0000000..7f94567
--- /dev/null
+++ b/deps/jemalloc/include/jemalloc/internal/hash.h
@@ -0,0 +1,320 @@
+#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; JEMALLOC_FALLTHROUGH;
+ case 2: k1 ^= tail[1] << 8; JEMALLOC_FALLTHROUGH;
+ 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;
+}
+
+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; JEMALLOC_FALLTHROUGH;
+ case 14: k4 ^= tail[13] << 8; JEMALLOC_FALLTHROUGH;
+ case 13: k4 ^= tail[12] << 0;
+ k4 *= c4; k4 = hash_rotl_32(k4, 18); k4 *= c1; h4 ^= k4;
+ JEMALLOC_FALLTHROUGH;
+ case 12: k3 ^= (uint32_t) tail[11] << 24; JEMALLOC_FALLTHROUGH;
+ case 11: k3 ^= tail[10] << 16; JEMALLOC_FALLTHROUGH;
+ case 10: k3 ^= tail[ 9] << 8; JEMALLOC_FALLTHROUGH;
+ case 9: k3 ^= tail[ 8] << 0;
+ k3 *= c3; k3 = hash_rotl_32(k3, 17); k3 *= c4; h3 ^= k3;
+ JEMALLOC_FALLTHROUGH;
+ case 8: k2 ^= (uint32_t) tail[ 7] << 24; JEMALLOC_FALLTHROUGH;
+ case 7: k2 ^= tail[ 6] << 16; JEMALLOC_FALLTHROUGH;
+ case 6: k2 ^= tail[ 5] << 8; JEMALLOC_FALLTHROUGH;
+ case 5: k2 ^= tail[ 4] << 0;
+ k2 *= c2; k2 = hash_rotl_32(k2, 16); k2 *= c3; h2 ^= k2;
+ JEMALLOC_FALLTHROUGH;
+ case 4: k1 ^= (uint32_t) tail[ 3] << 24; JEMALLOC_FALLTHROUGH;
+ case 3: k1 ^= tail[ 2] << 16; JEMALLOC_FALLTHROUGH;
+ case 2: k1 ^= tail[ 1] << 8; JEMALLOC_FALLTHROUGH;
+ case 1: k1 ^= tail[ 0] << 0;
+ k1 *= c1; k1 = hash_rotl_32(k1, 15); k1 *= c2; h1 ^= k1;
+ break;
+ }
+ }
+
+ /* 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;
+}
+
+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; JEMALLOC_FALLTHROUGH;
+ case 14: k2 ^= ((uint64_t)(tail[13])) << 40; JEMALLOC_FALLTHROUGH;
+ case 13: k2 ^= ((uint64_t)(tail[12])) << 32; JEMALLOC_FALLTHROUGH;
+ case 12: k2 ^= ((uint64_t)(tail[11])) << 24; JEMALLOC_FALLTHROUGH;
+ case 11: k2 ^= ((uint64_t)(tail[10])) << 16; JEMALLOC_FALLTHROUGH;
+ case 10: k2 ^= ((uint64_t)(tail[ 9])) << 8; JEMALLOC_FALLTHROUGH;
+ case 9: k2 ^= ((uint64_t)(tail[ 8])) << 0;
+ k2 *= c2; k2 = hash_rotl_64(k2, 33); k2 *= c1; h2 ^= k2;
+ JEMALLOC_FALLTHROUGH;
+ case 8: k1 ^= ((uint64_t)(tail[ 7])) << 56; JEMALLOC_FALLTHROUGH;
+ case 7: k1 ^= ((uint64_t)(tail[ 6])) << 48; JEMALLOC_FALLTHROUGH;
+ case 6: k1 ^= ((uint64_t)(tail[ 5])) << 40; JEMALLOC_FALLTHROUGH;
+ case 5: k1 ^= ((uint64_t)(tail[ 4])) << 32; JEMALLOC_FALLTHROUGH;
+ case 4: k1 ^= ((uint64_t)(tail[ 3])) << 24; JEMALLOC_FALLTHROUGH;
+ case 3: k1 ^= ((uint64_t)(tail[ 2])) << 16; JEMALLOC_FALLTHROUGH;
+ case 2: k1 ^= ((uint64_t)(tail[ 1])) << 8; JEMALLOC_FALLTHROUGH;
+ case 1: k1 ^= ((uint64_t)(tail[ 0])) << 0;
+ k1 *= c1; k1 = hash_rotl_64(k1, 31); k1 *= c2; h1 ^= k1;
+ break;
+ }
+ }
+
+ /* 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 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-07 20:42:59 +0000