How Java Floating Point Hurts Everyone Everywhere
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turned into numerical junk by Java's floating-point, work well in Kernighan-Ritchie . policies for mixed precision evaluation, Java chose the worse. .
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We call our modified Java language “ Borneo.” Borneo’s design was constrained to be Upward Compatible with Java : • Compiling Java programs with Borneo semantics should leave integer arithmetic unchanged and should change floating-point arithmetic at most very slightly. • Any old Java class already compiled to bytecode should be unable to tell whether other bytecode was compiled under Java’s semantics or Borneo’s. • Borneo is designed to require the least possible change to the Java Virtual Machine ( JVM ) that can remedy Java’s floating-point deficiencies. • Borneo adds to Java as little infix operator overloading, exception flag and trap handling, control over rounding directions and choice of precisions as is essential for good floating-pointprogramming. If you wish not to know about them, don’t mention them in your program. For more information about Borneo : http://www.cs.berkeley.edu/~darcy/Borneo . For more information about Floating-Point : http://www.cs.berkeley.edu/~wkahan
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