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Significant inaccuracy often occurs during the process of mathematicalcalculation due to the digit limitation of floating point, which may lead tocatastrophic loss. Normally, people believe that adjustment of floating-pointprecision is an effective way to solve this problem, since high-precisionfloating-point has more digits to store information. Thus, it is a prevalentmethod to reduce the inaccuracy in much floating-point related research, thatperforming all the operations with higher precision. However, we discover thatsome operations may lead to larger error in higher precision. In this paper, wedefine this kind of operation that generates large error due to precisionadjustment a precision-specific operation. Furthermore, we propose alight-weight searching algorithm for detecting precision-specific operationsand figure out an automatic processing method to fixing them. In addition, weconducted an experiment on the scientific mathematical library of GLIBC. Theresult shows that there are many precision-specific operations, and our fixingapproach can significantly reduce the inaccuracy.

Empirical Research and Automatic Processing Method of Precision-specific Operation