IEEE-remainder

Returns the remainder per IEEE 754 such that remainder = dividend - divisor * n where n is the integer closest to the exact value of dividend / divisor. If two integers are equally close, then n is the even one. If the remainder is zero, sign will match dividend. If dividend or divisor is ##NaN, or dividend is ##Inf or ##-Inf, or divisor is zero => ##NaN If dividend is finite and divisor is infinite => dividend Method: based on fmod return x-[x/p]chopped*p exactlp. Ported from: https://github.com/openjdk/jdk/blob/master/src/java.base/share/native/libfdlibm/e_remainder.c See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#IEEEremainder-double-double-