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change cchash constant

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from murmur2
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Simon Cruanes 2026-03-19 21:16:46 -04:00
parent f9ba2e8997
commit 4cafc2d2c5
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1 changed files with 5 additions and 1 deletions
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6
src/core/hash_stubs.c
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@ -19,7 +19,10 @@
#include <stdint.h> #include <stdint.h>
#include <string.h> #include <string.h>
#define HASH_MUL UINT64_C(0xd6e8feb86659fd93) // from murmur2: https://chromium.googlesource.com/external/smhasher/+/c8e8bf81bc6041d6d836365a501a0a96830d2d81/MurmurHash2.cpp
#define HASH_MUL UINT64_C(0xc6a4a7935bd1e995)
// from murmur3: https://github.com/aappleby/smhasher/blob/master/src/MurmurHash3.cpp#L81
#define FMIX_C1 UINT64_C(0xff51afd7ed558ccd) #define FMIX_C1 UINT64_C(0xff51afd7ed558ccd)
#define FMIX_C2 UINT64_C(0xc4ceb9fe1a85ec53) #define FMIX_C2 UINT64_C(0xc4ceb9fe1a85ec53)
@ -31,6 +34,7 @@ static inline uint64_t hash_combine(uint64_t state, uint64_t chunk)
return state; return state;
} }
// fmix64 from murmur3
static inline uint64_t fmix64(uint64_t h) static inline uint64_t fmix64(uint64_t h)
{ {
h ^= h >> 33; h ^= h >> 33;