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IEEE Std 854-1987, the ''Standard for Radix-Independent Floating-Point Arithmetic'', was the first Institute of Electrical and Electronics Engineers (IEEE) standard for floating-point arithmetic with radix 2 or radix 10 (not more general than that, despite the title). The standard was published in 1987, nearly immediately superseded by IEEE 754-1985 but never terminated (the year of ratification appears after the dash). IEEE 854 did not specify any formats, whereas IEEE 754-1985 did. IEEE 754 specifies floating-point arithmetic for both radix 2 (binary) and radix 10 (decimal), including specifying two alternative formats for radix 10 floating-point values. IEEE 754-1985 was only superseded in 2008 by IEEE 754-2008. IEEE 754-2008 also has many other updates to the IEEE floating point standardisation. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「IEEE 854-1987」の詳細全文を読む スポンサード リンク
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