# qopenmp-simd, Qopenmp-simd

Enables or disables OpenMP* SIMD compilation.

## Syntax

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

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

## Arguments

None

## Default

-qno-openmp-simd or /Qopenmp-simd- | OpenMP* SIMD compilation is disabled.

## 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.

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

Option -qopenmp-simd is equivalent to option -fiopenmp-simd; option /Qopenmp-simd is equivalent to option /Qiopenmp-simd.

### Note

Advanced users who prefer to use OpenMP* as it is implemented by the LLVM community, can get most of that functionality by using options -fopenmp and -fopenmp-simd.

## IDE Equivalent

None

## Alternate Options

Linux: -fiopenmp-simd

Windows /Qiopenmp-simd

## Example

Consider the following:

    -qno-openmp -qopenmp-simd    ! Linux
    /Qopenmp- /Qopenmp-simd      ! Windows

The above is 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.

Consider the following:

    -qopenmp -qopenmp-simd       ! Linux
    /Qopenmp /Qopenmp-simd       ! Windows

In this case, SIMD support is provided, the OpenMP library is linked, and OpenMP runtime initialization code is generated. Note that when you specify [q or Q]openmp, it implies [q or Q]openmp-simd.

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

## See Also

qopenmp, Qopenmp compiler option
O compiler option