protected void kf_bfly5(Array <kiss_fft_cpx <kiss_fft_scalar> > Fout, int fstride, int m)
{
Array <kiss_fft_cpx <kiss_fft_scalar> > Fout0, Fout1, Fout2, Fout3, Fout4;
int u;
kiss_fft_cpx <kiss_fft_scalar>[] scratch = new kiss_fft_cpx <kiss_fft_scalar> [13];
Array <kiss_fft_cpx <kiss_fft_scalar> > twiddles = new Array <kiss_fft_cpx <kiss_fft_scalar> >(Twiddles);
Array <kiss_fft_cpx <kiss_fft_scalar> > tw;
kiss_fft_cpx <kiss_fft_scalar> ya, yb;
ya = twiddles[fstride * m];
yb = twiddles[fstride * 2 * m];
Fout0 = Fout;
Fout1 = Fout0 + m;
Fout2 = Fout0 + 2 * m;
Fout3 = Fout0 + 3 * m;
Fout4 = Fout0 + 4 * m;
tw = new Array <kiss_fft_cpx <kiss_fft_scalar> >(twiddles);
for (u = 0; u < m; ++u)
{
Fout[0] = A.FixDivide(Fout[0], 5);
Fout1[0] = A.FixDivide(Fout1[0], 5);
Fout2[0] = A.FixDivide(Fout2[0], 5);
Fout3[0] = A.FixDivide(Fout3[0], 5);
Fout4[0] = A.FixDivide(Fout4[0], 5);
scratch[0] = new kiss_fft_cpx <kiss_fft_scalar>(Fout[0]);
scratch[1] = A.Multiply(Fout1[0], tw[u * fstride]);
scratch[2] = A.Multiply(Fout2[0], tw[2 * u * fstride]);
scratch[3] = A.Multiply(Fout3[0], tw[3 * u * fstride]);
scratch[4] = A.Multiply(Fout4[0], tw[4 * u * fstride]);
scratch[7] = A.Add(scratch[1], scratch[4]);
scratch[10] = A.Subtract(scratch[1], scratch[4]);
scratch[8] = A.Add(scratch[2], scratch[3]);
scratch[9] = A.Subtract(scratch[2], scratch[3]);
Fout[0].r = A.Add(Fout[0].r, A.Add(scratch[7].r, scratch[8].r));
Fout[0].i = A.Add(Fout[0].i, A.Add(scratch[7].i, scratch[8].i));
scratch[5].r = A.Add(scratch[0].r, A.Add(A.Multiply(scratch[7].r, ya.r), A.Multiply(scratch[8].r, yb.r)));
scratch[5].i = A.Add(scratch[0].i, A.Add(A.Multiply(scratch[7].i, ya.r), A.Multiply(scratch[8].i, yb.r)));
scratch[6].r = A.Add(A.Multiply(scratch[10].i, ya.i), A.Multiply(scratch[9].i, yb.i));
scratch[6].r = A.Negate(A.Add(A.Multiply(scratch[10].r, ya.i), A.Multiply(scratch[9].r, yb.i)));
Fout1[0] = A.Subtract(scratch[5], scratch[6]);
Fout4[0] = A.Add(scratch[5], scratch[6]);
scratch[11].r = A.Add(scratch[0].r, A.Add(A.Multiply(scratch[7].r, yb.r), A.Multiply(scratch[8].r, ya.r)));
scratch[11].i = A.Add(scratch[0].i, A.Add(A.Multiply(scratch[7].i, yb.r), A.Multiply(scratch[8].i, ya.r)));
scratch[12].r = A.Subtract(A.Multiply(scratch[9].i, ya.i), A.Multiply(scratch[10].i, yb.i));
scratch[12].i = A.Subtract(A.Multiply(scratch[10].r, yb.i), A.Multiply(scratch[9].r, ya.i));
Fout2[0] = A.Add(scratch[11], scratch[12]);
Fout3[0] = A.Subtract(scratch[11], scratch[12]);
++Fout0;
++Fout1;
++Fout2;
++Fout3;
++Fout4;
}
}