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    <p>Here are several references:</p> <ul> <li><a href="http://java.sun.com/developer/JDCTechTips/2001/tt0410.html#using" rel="noreferrer">Using strictfp</a> (JDC Tech Tip)</li> <li><p>jGuru: <a href="http://www.jguru.com/faq/view.jsp?EID=17544" rel="noreferrer">What is the strictfp modifier for? When would I consider using it?</a></p> <blockquote> <p>Basically, what it all boils down to is whether or not you care that the results of floating-point expressions in your code are fast or predictable. For example, if you need the answers that your code comes up with which uses floating-point values to be consistent across multiple platforms then use <code>strictfp</code>.</p> </blockquote></li> <li><p><a href="http://mindprod.com/jgloss/strictfp.html" rel="noreferrer">strictfp - Java Glossary</a> </p> <blockquote> <p>Floating point hardware calculates with more precision, and with a greater range of values than the Java specification requires. It would be confusing if some platforms gave more precision than others. When you use the <code>strictfp</code> modifier on a method or class, the compiler generates code that adheres strictly to the Java spec for identical results on all platforms. Without <code>strictfp</code>, is it is slightly laxer, but not so lax as to use the guard bits in the Pentium to give 80 bits of precision.</p> </blockquote></li> <li><p>And finally the actual Java Language Specification, <a href="http://java.sun.com/docs/books/jls/third_edition/html/expressions.html#249198" rel="noreferrer">§15.4 FP-strict Expressions</a>: </p> <blockquote> <p>Within an FP-strict expression, all intermediate values must be elements of the float value set or the double value set, implying that the results of all FP-strict expressions must be those predicted by IEEE 754 arithmetic on operands represented using single and double formats. Within an expression that is not FP-strict, some leeway is granted for an implementation to use an extended exponent range to represent intermediate results; the net effect, roughly speaking, is that a calculation might produce "the correct answer" in situations where exclusive use of the float value set or double value set might result in overflow or underflow.</p> </blockquote></li> </ul> <p>I've never personally had a use for it, though.</p>
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    1. POWhen should I use the "strictfp" keyword in java?
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    1. USMichael Myers
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