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Application dictates choice: fixed- or floating-point DSP?

机译:应用决定选择:定点还是浮点DSP?

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CHOOSING BETWEEN FIXED- AND FLOATING-POINT IMPLEMENTATIONS CAN BE DIFFICULT. A COMPARISON OF ONE OF EACH TYPE OF PROCESSOR AND SOME SAMPLE APPLICATIONS HIGHLIGHT SOME OF THE PROS AND CONS OF EACH APPROACH. Without a doubt, many algorithms can benefit from employing a floating-point implementation. The code can be simpler and take fewer cycles to execute than fixed-point implementations. However, these benefits do not really matter that much to end designers. Fewer designers are coding in assembly language, because compilers are getting better; coding fixed- or floating-point implementations in C takes similar-complexity. Designers can write floating-point code for a fixed-point processor: in C, but doing so causes a significant performance hit. What matters to end designers is the final system's performance, as well as the Cost and time to market.
机译:在固定点和浮动点之间进行选择可能会很困难。每种类型的处理器与某些示例应用程序的比较突出显示了每种方法的优缺点。毫无疑问,许多算法都可以从采用浮点实现中受益。与定点实现相比,该代码可以更简单并且执行所需的周期更少。但是,这些好处对最终设计师而言并不重要。更少的设计师使用汇编语言进行编码,因为编译器变得越来越好。在C中对定点或浮点实现进行编码会产生类似的复杂性。设计人员可以为定点处理器编写浮点代码:用C语言编写,但是这样做会严重影响性能。对于最终设计师而言,重要的是最终系统的性能以及成本和上市时间。

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