SqrtMix4
A non linear "mixer". An input alone will not be distorted. Distortion occurs only when many inputs are active. The output is the square root of the sum of the input squares. Note: the "square" and "squaroots" are "signed" i.e for negative values they are -x*x and -sqrt(-x*x).
Inlets
frac32buffer w
frac32buffer x
frac32buffer y
frac32buffer z
Outlets
frac32buffer.bipolar out
Parameters
frac32.u.map.gain Gw
frac32.u.map.gain Gx
frac32.u.map.gain Gy
frac32.u.map.gain Gz
float s;
int32_t out2;s = 1.0f / (1 << 11);
out2 = 0;float out = _VSQRTF(out2);
// prepare next out2
// (integer instructions executed in parallel of sqrtf)
{
int32_t t;
t = ___SMMUL(inlet_w, param_Gw);
out2 = ___SMMUL(t, abs(t));
t = ___SMMUL(inlet_x, param_Gx);
out2 = ___SMMLA(t, abs(t), out2);
t = ___SMMUL(inlet_y, param_Gy);
out2 = ___SMMLA(t, abs(t), out2);
t = ___SMMUL(inlet_z, param_Gz);
out2 = ___SMMLA(t, abs(t), out2);
}
{
bool neg;
if (neg = (out2 < 0))
out2 = -out2;
outlet_out = (int32_t)(s * out);
s = neg ? -1.0f * (1 << 17) : 1.0f * (1 << 17);
}