Pragmas
Pragmas are directives that provide instructions to the compiler for use in specific cases. For example, you can use the
is standard in the C++ language, but individual pragmas are machine-specific or operating system-specific, and vary by compiler.
novector
pragma to specify that a loop should never be vectorized. The keyword
#pragma
Some pragmas provide the same functionality as compiler options. Pragmas override behavior specified by compiler options.
Some pragmas are available for both Intel® and non-Intel microprocessors but they may perform additional optimizations for Intel® microprocessors than they perform for non-Intel microprocessors. Refer to the individual pragma name for detailed description.
The
Intel® oneAPI
pragmas are categorized as follows:
DPC++/C++
Compiler- Intel-specific Pragmas - pragmas developed or modified by Intel to work specifically with theIntel oneAPIDPC++/C++Compiler
- Intel Supported Pragmas - pragmas developed by external sources that are supported by theIntel oneAPIfor compatibility reasonsDPC++/C++Compiler
Using Pragmas
You enter pragmas into your C++ source code using the following syntax:
#pragma <pragma name>
Individual Pragma Descriptions
Each pragma description has the following details:
Section
| Description
|
|---|---|
Short Description | Contains a brief description of what the pragma does.
|
Syntax | Contains the pragma syntax.
|
Arguments | Contains a list of the arguments (parameters).
|
Description | Contains a detailed description of what the pragma does.
|
Example | Contains typical usage example/s.
|
See Also | Contains links or paths to other pragmas or related topics.
|