Issue with FastMath.expm1(709.85)

[mmatsn]

Hello,

org.hipparchus.util.FastMath.expm1(709.85) return -1.0, while java.util.Math.expm1(709.85) return +Infinity.

Issue is present on Hipparchus 1.6 and 2.3.
Tested with OpenJDK 1.8

Code to reproduce issue:
import org.hipparchus.util.FastMath;
public class ExpTest {
public static void main(final String[] args) {
System.out.println(System.getProperty("java.vm.name") + " " + System.getProperty("java.version"));
final double val = 709.85;
System.out.println("val=" + val + " expm1: java=" + Math.expm1(val) + " hipp=" + FastMath.expm1(val));
}
}

I get :
OpenJDK 64-Bit Server VM 1.8.0_261
val=709.85 expm1: java=Infinity hipp=-1.0

[maisonobe]

Fixed in master branch.

Thanks for the report!