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关于DM8148浮点除法运算的问题

您好,

        我现在用DM8148做浮点除法运算,比如 double a = 0.345; double b = 0.758;  double c = a / b; 这种运算有时可以算对,有时又算错,在其他条件一定的情况下。请问,做浮点运算是不是需要设置些寄存器之类的,期待大师指点。

pei qin