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Hacker News Daily 上看到「DEC64: Decimal Floating Point」:


value = coefficient * 10exponent

是以 10 為底。

0 與 NaN 是特別處理:

There are 255 possible representations of zero. They are all considered to be equal.

There is a special value called nan that has a coefficient of 0 and an exponent of -128. The result of division by zero is nan. nan is also the result of operations that produce results that are too large to be represented. nan is equal to itself.


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