Improvements to BigDecimal(double, MathContext) constructor
John Platts
john_platts at hotmail.com
Thu Jul 7 16:18:59 UTC 2016
Here is the current significand normalization loop below in the BigDecimal(double, MathContext) constructor:
// Normalize
while ((significand & 1) == 0) { // i.e., significand is even
significand >>= 1;
exponent++;
}
Here is a better way to normalize the significand in the BigDecimal(double, MathContext) constructor:
int significandTz = Long.numberOfTrailingZeros(significand);
significand >>= significandTz;
exponent += significandTz;
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