qopt-multiple-gather-scatter-by-shuffles, Qopt-multiple-gather-scatter-by-shuffles

Enables or disables the optimization for multiple adjacent gather/scatter type vector memory references. This content is specific to C++; it does not apply to DPC++.

Syntax

Linux:

-qopt-multiple-gather-scatter-by-shuffles

-qno-opt-multiple-gather-scatter-by-shuffles

Windows:

/Qopt-multiple-gather-scatter-by-shuffles

/Qopt-multiple-gather-scatter-by-shuffles-

Arguments

None

Default

varies

When this option is not specified, the compiler uses default heuristics for optimization.

Description

This option controls the optimization for multiple adjacent gather/scatter type vector memory references. This optimization hint is useful for performance tuning. It tries to generate more optimal software sequences using shuffles.

If you specify this option, the compiler will apply the optimization heuristics. If you specify -qno-opt-multiple-gather-scatter-by-shuffles or /Qopt-multiple-gather-scatter-by-shuffles-, the compiler will not apply the optimization.

Note

Optimization is affected by optimization compiler options, such as [Q]x, -march (Linux*), and /arch (Windows*).

Optimization Notice

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804

IDE Equivalent

None

Alternate Options

None

See Also