FastMath.rint(x) has the following code:
double y = floor(x);
double d = x - y;
if (d > 0.5) {
return y+1.0; // round up
}
...
For -0.5 < x < 0 the rounding up generates +0.0 - rather than -0.0,
as expected by the sign of the input parameter.
Is there an easy way to fix this, other than explicitly checking for y == -1.0?
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