Source
pub fn hashUint64WithSeed(v: u64, seed: u32) u32 {
const c1: u32 = 0xcc9e2d51;
const c2: u32 = 0x1b873593;
const len: u32 = 8;
var h1: u32 = seed;
var k1: u32 = undefined;
k1 = @as(u32, @truncate(v)) *% c1;
k1 = rotl32(k1, 15);
k1 *%= c2;
h1 ^= k1;
h1 = rotl32(h1, 13);
h1 *%= 5;
h1 +%= 0xe6546b64;
k1 = @as(u32, @truncate(v >> 32)) *% c1;
k1 = rotl32(k1, 15);
k1 *%= c2;
h1 ^= k1;
h1 = rotl32(h1, 13);
h1 *%= 5;
h1 +%= 0xe6546b64;
h1 ^= len;
h1 ^= h1 >> 16;
h1 *%= 0x85ebca6b;
h1 ^= h1 >> 13;
h1 *%= 0xc2b2ae35;
h1 ^= h1 >> 16;
return h1;
}