/arch (x64)

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Specifies the architecture for code generation on x64. Also see /arch (x86) and /arch (ARM).

/arch:[AVX|AVX2]

Arguments

  • /arch:AVX
    Enables the use of Intel Advanced Vector Extensions instructions.

  • /arch:AVX2
    Enables the use of Intel Advanced Vector Extensions 2 instructions.

Remarks

/arch only affects code generation for native functions. When you use /clr to compile, /arch has no effect on code generation for managed functions.

The __AVX__ preprocessor symbol is defined when the /arch:AVX compiler option is specified. The __AVX2__ preprocessor symbol is defined when the /arch:AVX2 compiler option is specified. For more information, see Predefined Macros. The /arch:AVX2 option was introduced in Visual Studio 2013 Update 2, version 12.0.34567.1.

To set the /arch:AVX or /arch:AVX2 compiler option in Visual Studio

  1. Open the Property Pages dialog box for the project. For more information, see How to: Open Project Property Pages.

  2. Select the Configuration Properties, C/C++ folder.

  3. Select the Code Generation property page.

  4. In the Enable Enhanced Instruction Set drop-down box, choose Advanced Vector Extensions (/arch:AVX) or Advanced Vector Extensions 2 (/arch:AVX2).

To set this compiler option programmatically

See Also

Reference

/arch (Minimum CPU Architecture)

Compiler Options

Setting Compiler Options