private static int GetDftExponent(int N, int V, int Idx, bool Even)
{
// take bits n-v..n-1 of idx, reverse them, shift left by n-v-1
int x = IntUtils.URShift(IntUtils.ReverseInt(Idx) << (N - V), (31 - N));
// if m is even, divide by two
if (Even)
{
x = IntUtils.URShift(x, 1);
}
return(x);
}
private static int GetIdftExponent(int N, int V, int Idx, bool Even)
{
int x = IntUtils.URShift(IntUtils.ReverseInt(Idx) << (N - V), (32 - N));
if (Even)
{
x += (1 << (N - V));
}
else
{
x += (1 << (N - 1 - V));
}
return(x + 1);
}