Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

ID 767251
Date 11/07/2023
Public

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Document Table of Contents

arch

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

Syntax

Linux:

-arch code

Windows:

/arch:code

Arguments

code

Indicates to the compiler a feature set that it may target, including which instruction sets it may generate. 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 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 (ifort only)

May generate Intel® SSE2 and SSE instructions.

SSE (ifort only)

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

IA32 (ifort only)

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. IA-32 support is deprecated; it will be removed in a future release.

Default

varies

If option arch is not specified, the default target architecture supports Intel® SSE2 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.

NOTE:

This option only applies to host compilation. When offloading is enabled, it does not impact device-specific compilation. Offloading can only be enabled when using ifx.

NOTE:

ifx does not support compilation for 32-bit architectures; only code values for 64-bit instruction sets may be specified for ifx.

IDE Equivalent

Visual Studio: Code Generation > Enable Enhanced Instruction Set

Alternate Options

None

See Also