I need to make use of numbers coming from another system that are 128-bit (quadruple-precision) floating point numbers in java.
Considering that there is no equivalent type in java, I would like to reduce the precision of the numbers using java code so they can be stored in a java double. This can be done fairly easily in c or using assembly but I would like to do it purely in java.
It is fair to assume that the quadruple-precision number is stored in a 128-bit byte array in java.
Is there a good solution, using only java? Thanks.
Depending on the size of the data set
BigDecimal
instantiated from an importedString
representation might be an easy and accurate option. I assume one can export string representations of those numbers from any programming language.I was so intrigued by this question that I was compelled to write a library to handle IEEE-754 floating point numbers. With the library, you can use the following:
From there, you can:
But the above snippet is just to illustrate general usage... a shorthand is provided for double:
The code is available at kerbaya.com/ieee754lib.