# qopenmp-simd, Qopenmp-simd

Enables or disables OpenMP* SIMD compilation.

## Syntax

Linux: | -qopenmp-simd -qno-openmp-simd

macOS: | -qopenmp-simd -qno-openmp-simd

Windows: | /Qopenmp-simd /Qopenmp-simd-

## Arguments

None

## Default

-qopenmp-simd or /Qopenmp-simd | OpenMP* SIMD compilation is enabled if the following option is in effect: ifort: O2 or higher ifx: O1 or higher OpenMP* SIMD compilation is always disabled at this optimization level: ifort: levels O1 or lower ifx: O0 When OpenMP* SIMD compilation is in effect because of the setting of option O, the OpenMP SIMD compilation can only be disabled by specifying option -qno-openmp-simd or /Qopenmp-simd-. OpenMP SIMD compilation is not disabled by specifying option -qno-openmp or /Qopenmp-.

## Description

This option enables or disables OpenMP* SIMD compilation.

You can use this option if you want to enable or disable the SIMD support with no impact on other OpenMP features. In this case, no OpenMP runtime library is needed to link and the compiler does not need to generate OpenMP runtime initialization code.

When you specify [q or Q]openmp, it implies [q or Q]openmp-simd.

If you specify this option with the [q or Q]openmp option, it can impact other OpenMP features.

## IDE Equivalent

None

## Alternate Options

ifort: None

ifx:

Linux: -fopenmp-simd and -fiopenmp-simd

Windows: /Qiopenmp-simd

## Example

The lines in the following example are equivalent to specifying only [q or Q]openmp-simd. In this case, only SIMD support is provided, the OpenMP* library is not linked, and only the !$OMP directives related to SIMD are processed:

Linux and macOS

    -qno-openmp -qopenmp-simd

Windows

    /Qopenmp- /Qopenmp-simd

In the following example, SIMD support is provided, the OpenMP library is linked, and OpenMP runtime initialization code is generated:

Linux and macOS

    -qopenmp -qopenmp-simd

Windows

    /Qopenmp /Qopenmp-simd

Parent topic: Offload Compilation, OpenMP*, and Parallel Processing Options

## See Also

qopenmp, Qopenmp compiler option
O compiler option
DECLARE SIMD
SIMD Directive (OpenMP* API)