Function noise

amd_lib/shared/d3d11/src/AMD_Rand.cpp:30–34

namespace AMD
{
    float noise(uint x)
    {
        x = (x<<13) ^ x;
        return ( 1.0f - ( (x * (x * x * 15731 + 789221) + 1376312589) & 0x7fffffff) / 1073741824.0f);
    }

    float random_float(uint seed, float a, float b)
    {