Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 7/13/2023
Public
Document Table of Contents

arch

Tells the compiler which features it may target, including which instruction sets it may generate.

Syntax

Linux:

None

macOS:

None

Windows:

/arch:code

Arguments

code

Indicates to the compiler a feature set that it may target, including which instruction sets it may generate. Many of the following descriptions refer to Intel® Streaming SIMD Extensions (Intel® SSE) and Supplemental Streaming SIMD Extensions (SSSE). Possible values are:

ALDERLAKE
AMBERLAKE
BROADWELL
CANNONLAKE
CASCADELAKE
COFFEELAKE
COOPERLAKE
GOLDMONT
GOLDMONT-PLUS
HASWELL
ICELAKE-CLIENT (or ICELAKE)
ICELAKE-SERVER
IVYBRIDGE
KABYLAKE
ROCKETLAKE
SANDYBRIDGE
SAPPHIRERAPIDS
SILVERMONT
SKYLAKE
SKYLAKE-AVX512
TIGERLAKE
TREMONT
WHISKEYLAKE

May generate instructions for processors that support the specified Intel® processor or microarchitecture code name.

Keyword ICELAKE is deprecated and may be removed in a future release.

CORE-AVX2

May generate Intel® Advanced Vector Extensions 2 (Intel® AVX2), Intel® AVX, SSE4.2, SSE4.1, SSE3, SSE2, SSE, and SSSE3 instructions.

CORE-AVX-I

May generate Float-16 conversion instructions and the RDRND instruction, Intel® Advanced Vector Extensions (Intel® AVX), Intel® SSE4.2, SSE4.1, SSE3, SSE2, SSE, and SSSE3 instructions.

AVX2

May generate Intel® Advanced Vector Extensions 2 (Intel® AVX2), Intel® AVX, Intel® SSE4.2, SSE4.1, SSE3, SSE2, SSE, and SSSE3 instructions.

AVX

May generate Intel® Advanced Vector Extensions (Intel® AVX), Intel® SSE4.2, SSE4.1, SSE3, SSE2, SSE, and SSSE3 instructions.

SSE4.2

May generate Intel® SSE4.2, SSE4.1, SSE3, SSE2, SSE, and SSSE3 instructions.

SSE4.1

May generate Intel® SSE4.1, SSE3, SSE2, SSE, and SSSE3 instructions.

SSSE3

May generate SSSE3 instructions and Intel® SSE3, SSE2, and SSE instructions.

SSE3

May generate Intel® SSE3, SSE2, and SSE instructions.

SSE2

May generate Intel® SSE2 and SSE instructions. This value is not available on macOS systems.

SSE

This setting has been deprecated. It is the same as specifying ia32.

IA32

Generates x86/x87 generic code that is compatible with IA-32 architecture. Disables any default extended instruction settings, and any previously set extended instruction settings. It also disables all feature-specific optimizations and instructions.

This value is only available on IA-32 architecture.

Default

SSE2

The compiler may generate Intel® SSE2 and SSE instructions.

Description

This option tells the compiler which features it may target, including which instruction sets it may generate.

Code generated with these options should execute on any compatible, non-Intel processor with support for the corresponding instruction set.

Options /arch and /Qx are mutually exclusive. If both are specified, the compiler uses the last one specified and generates a warning.

If you specify both the /Qax and /arch options, the compiler will not generate Intel-specific instructions.

IDE Equivalent

Visual Studio: Code Generation > Enable Enhanced Instruction Set

Eclipse: None

Xcode: None

Alternate Options

None

See Also