对于 GCCCFLAGS选项：-msse, -msse2, -mssse3, -msse4, -msse4.1, -msse4.2. 它们是独占使用还是可以一起使用？
我的理解是，选择设置哪个取决于程序将在其上运行的目标拱门是否支持它 - 这是正确的吗？
如果是这样，我怎么知道我的目标拱支持什么 sse？在 Linux 中，我 cat /proc/cpuinfo，但如果是 Mac 或 Windows 怎么办？
谢谢！
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The -m switched can be used in parallel, furthermore some of them are implied by the architecture or other switches. For instance, if you build code for x86_64, -msse -msse2 is always enabled.
For code intended to run on your system you should choose -march=native, which will select what is available on your processor. For instance, if you have a Sandy Bridge, this will enable -msse -msse2 -msse3 -mssse3 -msse4 -msse4.1 -msse4.2 -mavx.
If you want to specify in detail which instruction set to use, you should only use what is available, not always the "latest". The "latest" one is currently -mavx2, which I don't recommend: The first processor which will support it will be available in 2013.
于 2012-05-21T14:42:20.837 回答