C++ 如何在 Visual Studio 2008（使用 CMake）中启用 SSE/SSE2 指令集？
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How do I enable the SSE/SSE2 instruction set in Visual Studio 2008 (using CMake)?
提问by Angelo
In Visual Studio 2005 I went in:
在 Visual Studio 2005 中，我进入了：
View --> Property Pages --> C/C++ --> Code Generation --> Enable Enhanced Instruction Set
查看 --> 属性页 --> C/C++ --> 代码生成 --> 启用增强指令集
But in Visual Studio 2008?
但是在 Visual Studio 2008 中呢？
Thanks in advance
提前致谢
回答by Cat Plus Plus
If you're looking for SSE/SSE2: Project > Properties > Configuration Properties > C/C++ > Code Generation > Enable Enhanced Instruction Set, or append /arch:SSE(or /arch:SSE2) in Command Line > Additional Options.
如果你正在寻找SSE / SSE2： Project > Properties > Configuration Properties > C/C++ > Code Generation > Enable Enhanced Instruction Set，或追加/arch:SSE（或/arch:SSE2）的Command Line > Additional Options。
You need to have a native project, and at least one .cpp file added to access this, though.
不过，您需要有一个本机项目，并且至少添加了一个 .cpp 文件才能访问它。
回答by larsmoa
Using CMake you could add the following to CMakeLists.txt:
使用 CMake，您可以将以下内容添加到 CMakeLists.txt：
IF(MSVC)
ADD_DEFINITIONS(/arch:SSE)
ENDIF(MSVC)
or /arch:SSE2.
或/arch:SSE2。
回答by Naveen
It is Project->Properties... (same path as above)
它是 Project->Properties...（与上面相同的路径）
回答by Naveen
If you are using inline assembler __asm { .... }you don't need to enable it.
如果您使用内联汇编器__asm { .... }，则不需要启用它。
But if you enable SSE you have to be careful. It may be that the code is slower than normal FPU code.
但是，如果您启用 SSE，则必须小心。可能是代码比普通 FPU 代码慢。
