The IBM XL C compiler is a very good optimizer, and as a result, the C algorithm delivers superior results to a simple unoptimized assembly language implementation.

IBM XL C 编译器是一个非常好的优化器，结果是 C 算法的性能要比未经优化的汇编语言实现的性能好很多。

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This article has offered you a description of the IBM MASS libraries, and the auto-vectorization capabilities of the IBM XL C/C++ and XL Fortran compilers.

本文向您提供了对 IBM MASS 库以及 IBM XL C/C++ 和 XL Fortran 汇编器的自动向量化功能的描述。

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fno-rtti -qnortti Disables generation of runtime type -qrtti identification (RTTI) for exception handling and for use by typeid and dynamic_cast operators. On XL C/C++, the default is -qnortti.

fno-rtti -qnortti 对于异常处理和 typeid 和 dynamic_cast 操作符的使用，禁止生成运行时类型 –qrtti 识别（RTTI）。

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