Intel® Fortran Compiler 17.0 Developer Guide and Reference

simd, Qsimd

Enables or disables compiler interpretation of SIMD directives.

Syntax

Linux and macOS:

-simd

-no-simd

Windows:

/Qsimd

/Qsimd-

Arguments

None

Default

-simd
or/Qsimd

SIMD directives are enabled.

Description

This option enables or disables compiler interpretation of SIMD directives.

To disable interpretation of SIMD directives, specify -no-simd (Linux* and OS X*) or /Qsimd- (Windows*). Note that the compiler may still vectorize loops based on its own heuristics (leading to generation of SIMD instructions) even when -no-simd (or /Qsimd-) is specified.

To disable all compiler vectorization, use the "-no-vec -no-simd" (Linux* and OS X*) or "/Qvec- /Qsimd-" (Windows*) compiler options. The option -no-vec (and /Qvec-) disables all auto-vectorization, including vectorization of array notation statements. The option -no-simd (and /Qsimd-) disables vectorization of loops that have SIMD directives.

Note

If you specify option -mia32 or option /arch:IA32, SIMD directives are disabled by default. When you specify option -mia32 or option /arch:IA32, vector instructions cannot be used. Therefore, you cannot explicitly enable SIMD directives by specifying option [Q]simd.

IDE Equivalent

None

Alternate Options

None

See Also