CCS 优化开到最高时，运算的cossp的math库的结果完全不正确了

那这部分代码可能无法直接使用较高级别的优化。
In general, the compiler is capable of generating highly optimized code. However, in many cases, the
compiler, in order to assure the correct operation of the code, must take a conservative approach. For
such cases, additional information and instructions can be provided by the developer to guide the compiler
to maximally optimize the code.
建议使用额外的方法来进行优化，具体可以参考以下文档。
www.ti.com/.../sprabf2.pdf

请看一下有的变量是否用volatile关键字定义，防止被优化掉。