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专利名称：Apparatus and method for performing
variable precision floating point roundingoperations
发明人：Sivakumar Makineni申请号：US08/577726申请日：19951222公开号：US05696711A公开日：19971209
摘要：An apparatus and method for performing variable precision floating pointrounding operations is provided that accomplishes rounding of a number that is faster,less complex and requires less hardware than conventional devices. The apparatus andmethod provides for a single uniform incrementer located at the zero position that canadd a logic 1 to that position. After the Round, Guard and Sticky bits are produced, logic1s are inserted in the bit positions to the right of the significant bits of the result with acheck unit. The check unit then outputs the intermediate result to an incrementer and azero-out unit. The incrementer adds a 1 to the zero position and the carry function of theincrementer by operation ripples through the series of 1s up to the rightmost position ofthe resultant mantissa leaving a trail of zeroes behind producing a first output. Finally, amultiplexer is provided to choose between the first output and the second output as thefinal result.
申请人：INTEL CORPORATION
代理机构：Blakely, Sokoloff, Taylor & Zafman
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