说明：  DSP芯片的定点运算 为了DSP程序调试的方便及模拟定点DSP实现时的算法性能，在编写DSP汇编程序之前一般需将高级语言浮点算法改写为高级语言定点算法
(Fixed-point DSP chip DSP chip fixed-point arithmetic operations of fixed-point DSP chip DSP chip fixed-point arithmetic operations DSP chip fixed-point arithmetic DSP chip fixed-point arithmetic)