AH6
6x6 Almost Hadamard matrix
Inlets
frac32buffer in0
frac32buffer in1
frac32buffer in2
frac32buffer in3
frac32buffer in4
frac32buffer in5
Outlets
frac32buffer out0
frac32buffer out1
frac32buffer out2
frac32buffer out3
frac32buffer out4
frac32buffer out5
// 1/3sqrt2
// -1 2 2 -1 2 2
// 2 -1 2 2 -1 2
// 2 2 -1 2 2 -1
// -1 2 2 1 -2 -2
// 2 -1 2 -2 1 -2
// 2 2 -1 -2 -2 1
// -0.2357
// 0.4714
// 16+ 8*
void AH6(int32_t x0, int32_t x1, int32_t x2, int32_t x3, int32_t x4, int32_t x5,
int32_t &y0, int32_t &y1, int32_t &y2, int32_t &y3, int32_t &y4,
int32_t &y5) {
int32_t yA = ___SMMUL(x0 + x1 + x2, 1431655765) << 1; // 2/3
int32_t yB = ___SMMUL(x3 + x4 + x5, 1431655765) << 1;
// coef = (2^31)/sqrt(2)
int32_t coef = 1518500249;
int32_t a = yA - x0;
int32_t b = yB - x3;
y0 = ___SMMUL(a + b, coef) << 1;
y3 = ___SMMUL(a - b, coef) << 1;
a = yA - x1;
b = yB - x4;
y1 = ___SMMUL(a + b, coef) << 1;
y4 = ___SMMUL(a - b, coef) << 1;
a = yA - x2;
b = yB - x5;
y2 = ___SMMUL(a + b, coef) << 1;
y5 = ___SMMUL(a - b, coef) << 1;
}AH6(inlet_in0, inlet_in1, inlet_in2, inlet_in3, inlet_in4, inlet_in5,
outlet_out0, outlet_out1, outlet_out2, outlet_out3, outlet_out4,
outlet_out5);