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andanteyk/ibukihash.hlsl

Created December 19, 2024 10:00
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IbukiHash
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ibukihash.hlsl
// IbukiHash by Andante (https://twitter.com/andanteyk)
// This work is marked with CC0 1.0. To view a copy of this license, visit https://creativecommons.org/publicdomain/zero/1.0/
float ibuki(float4 v)
{
const uint4 mult =
uint4(0xae3cc725, 0x9fe72885, 0xae36bfb5, 0x82c1fcad);
uint4 u = uint4(v);
u = u * mult;
u ^= u.wxyz ^ u >> 13;
uint r = dot(u, mult);
r ^= r >> 11;
r = (r * r) ^ r;
return r * 2.3283064365386962890625e-10;
}
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