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authorEmmanuel Gil Peyrot <linkmauve@linkmauve.fr>2016-09-18 02:38:01 +0200
committerEmmanuel Gil Peyrot <linkmauve@linkmauve.fr>2016-09-18 02:38:01 +0200
commitdc8479928c5aee4c6ad6fe4f59006fb604cee701 (patch)
tree569a7f13128450bbab973236615587ff00bced5f /src/common/hash.cpp
parentTravis: Import Dolphin’s clang-format hook. (diff)
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Diffstat (limited to 'src/common/hash.cpp')
-rw-r--r--src/common/hash.cpp96
1 files changed, 64 insertions, 32 deletions
diff --git a/src/common/hash.cpp b/src/common/hash.cpp
index c49c2f60e..a46c92553 100644
--- a/src/common/hash.cpp
+++ b/src/common/hash.cpp
@@ -36,7 +36,7 @@ static FORCE_INLINE u64 fmix64(u64 k) {
// platforms (MurmurHash3_x64_128). It was taken from:
// https://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp
void MurmurHash3_128(const void* key, int len, u32 seed, void* out) {
- const u8 * data = (const u8*)key;
+ const u8* data = (const u8*)key;
const int nblocks = len / 16;
u64 h1 = seed;
@@ -47,52 +47,84 @@ void MurmurHash3_128(const void* key, int len, u32 seed, void* out) {
// Body
- const u64 * blocks = (const u64 *)(data);
+ const u64* blocks = (const u64*)(data);
for (int i = 0; i < nblocks; i++) {
- u64 k1 = getblock64(blocks,i*2+0);
- u64 k2 = getblock64(blocks,i*2+1);
-
- k1 *= c1; k1 = _rotl64(k1,31); k1 *= c2; h1 ^= k1;
-
- h1 = _rotl64(h1,27); h1 += h2; h1 = h1*5+0x52dce729;
-
- k2 *= c2; k2 = _rotl64(k2,33); k2 *= c1; h2 ^= k2;
-
- h2 = _rotl64(h2,31); h2 += h1; h2 = h2*5+0x38495ab5;
+ u64 k1 = getblock64(blocks, i * 2 + 0);
+ u64 k2 = getblock64(blocks, i * 2 + 1);
+
+ k1 *= c1;
+ k1 = _rotl64(k1, 31);
+ k1 *= c2;
+ h1 ^= k1;
+
+ h1 = _rotl64(h1, 27);
+ h1 += h2;
+ h1 = h1 * 5 + 0x52dce729;
+
+ k2 *= c2;
+ k2 = _rotl64(k2, 33);
+ k2 *= c1;
+ h2 ^= k2;
+
+ h2 = _rotl64(h2, 31);
+ h2 += h1;
+ h2 = h2 * 5 + 0x38495ab5;
}
// Tail
- const u8 * tail = (const u8*)(data + nblocks*16);
+ const u8* tail = (const u8*)(data + nblocks * 16);
u64 k1 = 0;
u64 k2 = 0;
switch (len & 15) {
- case 15: k2 ^= ((u64)tail[14]) << 48;
- case 14: k2 ^= ((u64)tail[13]) << 40;
- case 13: k2 ^= ((u64)tail[12]) << 32;
- case 12: k2 ^= ((u64)tail[11]) << 24;
- case 11: k2 ^= ((u64)tail[10]) << 16;
- case 10: k2 ^= ((u64)tail[ 9]) << 8;
- case 9: k2 ^= ((u64)tail[ 8]) << 0;
- k2 *= c2; k2 = _rotl64(k2,33); k2 *= c1; h2 ^= k2;
-
- case 8: k1 ^= ((u64)tail[ 7]) << 56;
- case 7: k1 ^= ((u64)tail[ 6]) << 48;
- case 6: k1 ^= ((u64)tail[ 5]) << 40;
- case 5: k1 ^= ((u64)tail[ 4]) << 32;
- case 4: k1 ^= ((u64)tail[ 3]) << 24;
- case 3: k1 ^= ((u64)tail[ 2]) << 16;
- case 2: k1 ^= ((u64)tail[ 1]) << 8;
- case 1: k1 ^= ((u64)tail[ 0]) << 0;
- k1 *= c1; k1 = _rotl64(k1,31); k1 *= c2; h1 ^= k1;
+ case 15:
+ k2 ^= ((u64)tail[14]) << 48;
+ case 14:
+ k2 ^= ((u64)tail[13]) << 40;
+ case 13:
+ k2 ^= ((u64)tail[12]) << 32;
+ case 12:
+ k2 ^= ((u64)tail[11]) << 24;
+ case 11:
+ k2 ^= ((u64)tail[10]) << 16;
+ case 10:
+ k2 ^= ((u64)tail[9]) << 8;
+ case 9:
+ k2 ^= ((u64)tail[8]) << 0;
+ k2 *= c2;
+ k2 = _rotl64(k2, 33);
+ k2 *= c1;
+ h2 ^= k2;
+
+ case 8:
+ k1 ^= ((u64)tail[7]) << 56;
+ case 7:
+ k1 ^= ((u64)tail[6]) << 48;
+ case 6:
+ k1 ^= ((u64)tail[5]) << 40;
+ case 5:
+ k1 ^= ((u64)tail[4]) << 32;
+ case 4:
+ k1 ^= ((u64)tail[3]) << 24;
+ case 3:
+ k1 ^= ((u64)tail[2]) << 16;
+ case 2:
+ k1 ^= ((u64)tail[1]) << 8;
+ case 1:
+ k1 ^= ((u64)tail[0]) << 0;
+ k1 *= c1;
+ k1 = _rotl64(k1, 31);
+ k1 *= c2;
+ h1 ^= k1;
};
// Finalization
- h1 ^= len; h2 ^= len;
+ h1 ^= len;
+ h2 ^= len;
h1 += h2;
h2 += h1;