Enables or disables OpenMP* SIMD compilation.
Linux: | -qopenmp-simd -qno-openmp-simd |
macOS: | -qopenmp-simd -qno-openmp-simd |
Windows: | /Qopenmp-simd /Qopenmp-simd- |
None
-qopenmp-simd or /Qopenmp-simd |
OpenMP* SIMD compilation is enabled if the following option is in effect:
OpenMP* SIMD compilation is always disabled at this optimization level:
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-. |
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.
ifort: None
ifx:
Linux: -fopenmp-simd and -fiopenmp-simd
Windows: /Qiopenmp-simd
Consider the following:
-qno-openmp -qopenmp-simd ! Linux or macOS* /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 or macOS* /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.