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专利名称：Method and apparatus for handling
overflow and underflow in processingfloating-point numbers
发明人：James Charles Brakefield申请号：US08/574919申请日：19951219公开号：US052697A公开日：19990406
摘要：A method for processing floating-point numbers, each floating- point numberhaving at least sign portion, an exponent portion and a mantissa portion, comprising thesteps of converting a floating-point number memory register representation to afloating-point register representation; rounding the converted floating-point number;performing an arithmetic computation upon said rounded number resulting in a newfloating-point value; and converting the resulting new floating-point register value to afloating-point memory register representation. An apparatus for processing floating-point numbers comprising means for converting a floating-point value from a randomaccess memory register to a floating-point unit register; means for selecting the type ofaccuracy required of the converted value; means for selecting the type of roundingrequired of the converted floating-point value; means for performing an arithmeticoperation upon at least one converted floating- point value based upon said selectedaccuracy and rounding; means for chopping the result of the arithmetic operation to fit amantissa portion of a floating-point value; and means for converting the resultingfloating- point value from the floating-point register representation to the random
access memory representation.
申请人：BRAKEFIELD; JAMES CHARLES
代理机构：Royston, Rayzor, Vickery, Novak & Druce, LP.
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