Intel® oneAPI DPC++/C++ Compiler Developer Guide and Reference

Download PDF
ID 767253
Date 6/24/2024
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents
Document Table of Contents x
Intel® oneAPI DPC++/C++ Compiler Developer Guide and Reference
Intel® oneAPI DPC++/C++ Compiler Developer Guide and Reference x
Intel® oneAPI DPC++/C++ Compiler Introduction Compiler Setup Compiler Reference Compilation Optimization and Programming Compatibility and Portability Notices and Disclaimers
Intel® oneAPI DPC++/C++ Compiler Introduction x
Get Help and Support Related Information
Compiler Setup x
Use the Command Line Use Eclipse Use Microsoft Visual Studio
Use the Command Line x
Specify Component Locations Invoke the Compiler Use the Command Line on Windows File Extensions Use Makefiles for Compilation Use CMake with the Compiler Use Compiler Options Specify Compiler Files Convert Projects to Use a Selected Compiler
Use Eclipse x
Add the Compiler to Eclipse Multiversion Compiler Support Use Cheat Sheets Create a Simple Eclipse Project Makefiles Use Intel Libraries with Eclipse
Use Microsoft Visual Studio x
Create a New Project Use the Intel® oneAPI DPC++/C++ Compiler Select the Compiler Version Specify a Base Platform Toolset Use Property Pages Use Intel® Libraries with Microsoft Visual Studio* Include MPI Support Use Code Coverage in Microsoft Visual Studio* Use Profile Guided Optimization in Microsoft Visual Studio* Optimization Reports Dialog Box Help
Dialog Box Help x
Use Intel® oneAPI DPC++/C++ Compiler dialog box Hardware Profile-Guided Optimization dialog box Options: Compilers dialog box Options: Intel Libraries for oneAPI dialog box Options: Converter dialog box Options: Optimization Reports dialog box Options: Profile Guided Optimization dialog box Profile Guided Optimization dialog box Options: Code Coverage dialog box Code Coverage dialog box Code Coverage Settings dialog box
Compiler Reference x
C/C++/SYCL Calling Conventions Compiler Options Floating-Point Operations Attributes Intrinsics Libraries Macros Pragmas Syntactic and Semantic Errors
Compiler Options x
Alphabetical Option List General Rules for Compiler Options What Appears in the Compiler Option Descriptions Optimization Options Advanced Optimization Options Code Generation Options Offload Compilation, OpenMP*, and Parallel Processing Options Interprocedural Optimization Options Profile Guided Optimization Options Optimization Report Options Floating-Point Options Inlining Options Output, Debug, and Precompiled Header Options Preprocessor Options Component Control Options Language Options Data Options Compiler Diagnostic Options Compatibility Options Linking or Linker Options Miscellaneous Options Deprecated and Removed Compiler Options Display Option Information Alternate Compiler Options Portability and GCC-Compatible Warning Options
Optimization Options x
fast fbuiltin, Oi foptimize-sibling-calls GF nolib-inline O Od Ofast Os Ot Ox
Advanced Optimization Options x
ffreestanding, Qfreestanding fjump-tables fvec-peel-loops, Qvec-peel-loops fvec-remainder-loops, Qvec-remainder-loops fvec-with-mask, Qvec-with-mask ipp-link, Qipp-link mno-gather, Qgather- mno-scatter, Qscatter- qactypes, Qactypes qdaal, Qdaal qipp, Qipp qmkl, Qmkl qmkl-ilp64, Qmkl-ilp64 qmkl-sycl-impl, Qmkl-sycl-impl qopt-assume-no-loop-carried-dep, Qopt-assume-no-loop-carried-dep qopt-dynamic-align, Qopt-dynamic-align qopt-for-throughput, Qopt-for-throughput qopt-mem-layout-trans, Qopt-mem-layout-trans qopt-multiple-gather-scatter-by-shuffles, Qopt-multiple-gather-scatter-by-shuffles qopt-prefetch, Qopt-prefetch qopt-prefetch-distance, Qopt-prefetch-distance qopt-prefetch-loads-only, Qopt-prefetch-loads-only qopt-streaming-stores, Qopt-streaming-stores qopt-zmm-usage, Qopt-zmm-usage qtbb, Qtbb unroll, Qunroll vec, Qvec vec-threshold, Qvec-threshold vecabi, Qvecabi
Code Generation Options x
arch ax, Qax EH fasynchronous-unwind-tables fcf-protection, Qcf-protection fdata-sections, Gw fexceptions ffunction-sections, Gy fomit-frame-pointer Gd GR guard Gv m, Qm m64, Qm64 m80387 march masm mauto-arch, Qauto-arch mbranches-within-32B-boundaries, Qbranches-within-32B-boundaries mintrinsic-promote, Qintrinsic-promote momit-leaf-frame-pointer mtune, tune regcall, Qregcall x, Qx xHost, QxHost
Offload Compilation, OpenMP*, and Parallel Processing Options x
device-math-lib fintelfpga fiopenmp, Qiopenmp flink-huge-device-code fno-sycl-libspirv foffload-static-lib fopenmp fopenmp-concurrent-host-device-compile, Qopenmp-concurrent-host-device-compile fopenmp-declare-target-scalar-defaultmap, Qopenmp-declare-target-scalar-defaultmap fopenmp-device-code-split, Qopenmp-device-code-split fopenmp-device-lib fopenmp-max-parallel-link-jobs, Qopenmp-max-parallel-link-jobs fopenmp-target-buffers, Qopenmp-target-buffers fopenmp-target-default-sub-group-size, Qopenmp-target-default-sub-group-size fopenmp-target-loopopt, Qopenmp-target-loopopt fopenmp-target-simd, Qopenmp-target-simd fopenmp-targets, Qopenmp-targets fsycl fsycl-add-default-spec-consts-image fsycl-add-targets fsycl-dead-args-optimization fsycl-device-code-split fsycl-device-lib fsycl-device-obj fsycl-device-only fsycl-early-optimizations fsycl-enable-function-pointers fsycl-esimd-force-stateless-mem fsycl-explicit-simd fsycl-force-target fsycl-help fsycl-host-compiler fsycl-host-compiler-options fsycl-id-queries-fit-in-int fsycl-instrument-device-code fsycl-link fsycl-link-huge-device-code fsycl-link-targets fsycl-max-parallel-link-jobs fsycl-optimize-non-user-code fsycl-pstl-offload fsycl-rdc fsycl-remove-unused-external-funcs fsycl-targets fsycl-unnamed-lambda fsycl-use-bitcode ftarget-compile-fast ftarget-export-symbols ftarget-register-alloc-mode, Qtarget-register-alloc-mode nolibsycl qopenmp, Qopenmp qopenmp-link qopenmp-simd, Qopenmp-simd qopenmp-stubs, Qopenmp-stubs reuse-exe Wno-sycl-strict Xopenmp-target Xs Xsycl-target
Interprocedural Optimization Options x
flto ipo, Qipo
Profile Guided Optimization Options x
fprofile-dwo-dir fprofile-ml-use fprofile-sample-generate fprofile-sample-use
Optimization Report Options x
qopt-report, Qopt-report qopt-report-file, Qopt-report-file qopt-report-stdout, Qopt-report-stdout
Floating-Point Options x
ffp-accuracy, Qfp-accuracy ffp-contract fimf-absolute-error, Qimf-absolute-error fimf-accuracy-bits, Qimf-accuracy-bits fimf-arch-consistency, Qimf-arch-consistency fimf-domain-exclusion, Qimf-domain-exclusion fimf-max-error, Qimf-max-error fimf-precision, Qimf-precision fimf-use-svml, Qimf-use-svml fma, Qfma fp-model, fp fp-speculation, Qfp-speculation ftz, Qftz pc, Qpc
Inlining Options x
fgnu89-inline finline finline-functions
Output, Debug, and Precompiled Header Options x
c debug (Linux*) debug (Windows*) Fa fasm-blocks Fe fno-system-debug Fo Fp fverbose-asm g gdwarf grecord-gcc-switches gsplit-dwarf o S use-msasm Y- Yc Yu Zi, Z7, ZI
Preprocessor Options x
B C D dD, QdD dM, QdM E EP FI H, QH I idirafter imacros iprefix iquote isystem iwithprefix iwithprefixbefore M, QM MD, QMD MF, QMF MG, QMG MM, QMM MMD, QMMD MQ, QMQ MT, QMT nostdinc++ P TP U undef X
Component Control Options x
Qoption
Language Options x
ansi fno-gnu-keywords fno-operator-names fno-rtti fpermissive fshort-enums fsyntax-only, Zs funsigned-char, J std, Qstd strict-ansi vd vmg x (type option) Zc Zg Zp
Data Options x
fcommon fkeep-static-consts, Qkeep-static-consts fmaintain-32-byte-stack-align, Qmaintain-32-byte-stack-align fmath-errno fpack-struct fpic fpie fstack-protector fstack-security-check fvisibility fzero-initialized-in-bss, Qzero-initialized-in-bss GA Gs GS mcmodel Qlong-double
Compiler Diagnostic Options x
w W Wabi Wall Wcheck-unicode-security Wcomment Wdeprecated Werror, WX Werror-all Wextra-tokens Wformat Wformat-security Wmain Wmissing-declarations Wmissing-prototypes Wpointer-arith Wreorder Wreturn-type Wshadow Wsign-compare Wstrict-aliasing Wstrict-prototypes Wtrigraphs Wuninitialized Wunknown-pragmas Wunused-function Wunused-variable Wwrite-strings
Compatibility Options x
gcc-toolchain vmv
Linking or Linker Options x
F (Windows*) fixed fortlib fuse-ld l L LD MD MT nodefaultlibs no-intel-lib, Qno-intel-lib nostartfiles nostdlib pie pthread shared shared-intel shared-libgcc static static-intel static-libgcc static-libstdc++ T u (Linux*) v Wa Wl, link Wp Xlinker Zl
Miscellaneous Options x
dryrun dumpmachine dumpversion fpreview-breaking-changes help nologo save-temps, Qsave-temps showIncludes sox, Qsox sysroot Tc TC Tp version
Floating-Point Operations x
Programming Tradeoffs in Floating-Point Applications Floating-Point Optimizations Denormal Numbers Floating-Point Environment Set the FTZ and DAZ Flags Tuning Performance IEEE Floating-Point Operations
Attributes x
align align_value allow_cpu_features code_align const cpu_dispatch, cpu_specific target
Libraries x
Create Libraries Use Intel Shared Libraries Manage Libraries Redistribute Libraries When Deploying Applications Resolve References to Shared Libraries Redistributable Library Considerations Intel's Memory Allocator Library SIMD Data Layout Templates Intel® C++ Class Libraries Intel's C++ Asynchronous I/O Extensions for Windows IEEE 754-2008 Binary Floating-Point Conformance Library Intel's Numeric String Conversion Library
SIMD Data Layout Templates x
Function Calls and Containers User-Level Interface Examples
Function Calls and Containers x
Construct an n_container Bounds
User-Level Interface x
SDLT Primitives soa1d_container aos1d_container n_container Bounds Accessors Proxy Objects Number Representation Indexes Convenience and Correctness
aos1d_container x
access_by
n_container x
Layouts Shape make_ n_container template function extent_d template function
Shape x
n_extent_generator
Bounds x
bounds_t sdlt::bounds Template Function n_bounds_t n_bounds_generator bounds_d Template Function
Accessors x
soa1d_container::accessor and aos1d_container::accessor soa1d_container::const_accessor and aos1d_container::const_accessor Accessor Concept
Proxy Objects x
Proxy ConstProxy
Number Representation x
aligned_offset fixed_offset
Indexes x
linear_index n_index_t n_index_generator index_d template function
Convenience and Correctness x
max_val min_val
Examples x
Efficiency with Structure of Arrays Example Complex SDLT Primitive Construction Example Forward Dependency Example Use of Offsets and Methods on a SDLT Primitive Example RGB to YUV Conversion Example
Intel® C++ Class Libraries x
C++ Classes and SIMD Operations Capabilities of C++ SIMD Classes Integer Vector Classes Floating-Point Vector Classes Classes Quick Reference Programming Example Intel's valarray Implementation
Integer Vector Classes x
Terms and Syntax Rules for Operators Assignment Operator Logical Operators Addition and Subtraction Operators Multiplication Operators Shift Operators Comparison Operators Conditional Select Operators Debug Operations Unpack Operators Pack Operators Clear MMX™ State Operator Integer Functions for Intel® Streaming SIMD Extensions Conversions between Fvec and Ivec
Floating-Point Vector Classes x
Fvec Syntax and Notation Data Alignment Conversions Constructors and Initialization Arithmetic Operators Minimum and Maximum Operators Logical Operators Compare Operators Conditional Select Operators for Fvec Classes Cacheability Support Operators Debug Operations Load and Store Operators Unpack Operators Move Mask Operators
Intel's C++ Asynchronous I/O Extensions for Windows x
Intel's C++ Asynchronous I/O Library for Windows Intel's C++ Asynchronous I/O Class for Windows
Intel's C++ Asynchronous I/O Library for Windows x
aio_read aio_write Example for aio_read and aio_write Functions aio_suspend Example for aio_suspend Function aio_error aio_return Example for aio_error and aio_return Functions aio_fsync aio_cancel Example for aio_cancel Function lio_listio Example for lio_listio Function Asynchronous I/O Function Errors
Intel's C++ Asynchronous I/O Class for Windows x
Template Class async_class get_last_operation_id wait get_status get_last_error get_error_operation_id stop_queue resume_queue clear_queue Example for Using async_class Template Class
IEEE 754-2008 Binary Floating-Point Conformance Library x
Intel® IEEE 754-2008 Binary Floating-Point Conformance Library and Usage Function List Homogeneous General-Computational Operations Functions General-Computational Operation Functions Quiet-Computational Operations Functions Signaling-Computational Operations Functions Non-Computational Operations Functions
Intel's Numeric String Conversion Library x
Use Intel's Numeric String Conversion Library Function List
Macros x
ISO Standard Predefined Macros Additional Predefined Macros Use Predefined Macros to Specify Intel® Compilers
Pragmas x
Intel-Specific Pragma Reference Supported OpenMP* Pragmas Alphabetical List of Supported OpenMP* Pragmas Categories of Supported OpenMP* Pragmas Pragmas Compatible with Other Compilers
Intel-Specific Pragma Reference x
block_loop/noblock_loop distribute_point inline, noinline, forceinline ivdep loop_count nofusion novector omp target variant dispatch ompx prefetch data prefetch/noprefetch unroll/nounroll unroll_and_jam/nounroll_and_jam vector
Compilation x
Compilation Overview Supported Environment Variables Pass Options to the Linker Specify Alternate Tools Use Configuration Files Use Response Files Global Symbols and Visibility Attributes for Linux* Save Compiler Information in Your Executable Link Debug Information Ahead of Time Compilation Device Offload Compilation Considerations Use a Third-Party Compiler as a Host Compiler for SYCL Code
Optimization and Programming x
Extensions OpenMP* Support Intel® oneAPI Level Zero Vectorization Instrumented Profile-Guided Optimization Hardware Profile-Guided Optimization High-Level Optimization Interprocedural Optimization Methods to Optimize Code Size Compiler Math Library IMF Device Library Basic Arithmetic Operations and Simple Math Functions
OpenMP* Support x
Add OpenMP* Support Parallel Processing Model Worksharing Using OpenMP* Control Thread Allocation OpenMP* Library Support OpenMP* Contexts OpenMP* Advanced Issues OpenMP* Implementation-Defined Behaviors OpenMP* Examples
OpenMP* Library Support x
OpenMP* Runtime Library Routines Intel® Compiler Extension Routines to OpenMP* OpenMP* Support Libraries Use the OpenMP Libraries Thread Affinity Interface OpenMP* Memory Spaces and Allocators
OpenMP* Contexts x
OpenMP* Context Selectors Score and Match Context Selectors
Intel® oneAPI Level Zero x
Intel® oneAPI Level Zero Switch Intel® oneAPI Level Zero Backend Specification Programming with the Intel® oneAPI Level Zero Backend
Vectorization x
Automatic Vectorization Explicit Vector Programming
Automatic Vectorization x
Vectorization Programming Guidelines Use Automatic Vectorization Vectorization and Loops Loop Constructs
Explicit Vector Programming x
User-Mandated or SIMD Vectorization SIMD-Enabled Functions SIMD-Enabled Function Pointers Function Annotations and the SIMD Directive for Vectorization Explicit SIMD SYCL Extension
Interprocedural Optimization x
Use Interprocedural Optimization Performance Considerations Create a Library from IPO Objects Inline Expansion of Functions
Compiler Math Library x
Use the Compiler Math Library Math Function List Trigonometric Functions Hyperbolic Functions Exponential Functions Special Functions Nearest Integer Functions Remainder Functions Miscellaneous Functions Complex Functions C99 Macros
IMF Device Library x
IMF Device Library Usage Example IMF Device Library Function List IMF Device Library Trigonometric Functions IMF Device Library Hyperbolic Functions IMF Device Library Exponential Functions IMF Device Library Logarithmic Functions IMF Device Library Power Functions IMF Device Library Special Functions IMF Device Library Rounding Functions IMF Device Library Miscellaneous Functions
Compatibility and Portability x
Standards Conformance GCC Compatibility and Interoperability Microsoft Compatibility Port from Microsoft Visual C++* to the Intel® oneAPI DPC++/C++ Compiler Port from GCC* to the Intel® oneAPI DPC++/C++ Compiler
Port from Microsoft Visual C++* to the Intel® oneAPI DPC++/C++ Compiler x
Modify Your makefile Other Considerations
Port from GCC* to the Intel® oneAPI DPC++/C++ Compiler x
Modify Your makefile Other Considerations
Intel® oneAPI DPC++/C++ Compiler Developer Guide and Reference

Supported OpenMP* Pragmas

This is a summary of the OpenMP* pragmas supported in the Intel® oneAPI DPC++/C++ Compiler. For detailed information about the OpenMP API, see the OpenMP Application Program Interface Version 5.1 specification, which is available from the OpenMP web site.

This topic has an alphabetical list of supported OpenMP pragmas and after that list, it shows categories for the supported OpenMP pragmas.

Alphabetical List of Supported OpenMP* Pragmas

The Intel oneAPI DPC++/C++ Compiler currently supports OpenMP* 5.0 Version TR4, and some OpenMP Version 5.1 pragmas. Supported pragmas are listed below. For more information about these pragmas, reference the OpenMP* Version 5.1 specification.

Intel-specific clauses, if any, are noted in the affected pragma description.

Pragma

Description

omp allocate

Specifies memory allocators to use for object allocation and deallocation.

omp atomic

Specifies a computation that must be executed atomically.

omp barrier

Specifies a point in the code where each thread must wait until all threads in the team arrive.

omp cancel

Requests cancellation of the innermost enclosing region of the type specified, and causes the encountering task to proceed to the end of the cancelled construct.

omp cancellation point

Defines a point at which implicit or explicit tasks check to see if cancellation has been requested for the innermost enclosing region of the type specified. This construct does not implement a synchronization between threads or tasks.

omp critical

Specifies a code block that is restricted to access by only one thread at a time.

omp declare reduction

Declares user-defined reduction (UDR) functions (reduction identifiers) that can be used as reduction operators in a reduction clause.

omp declare simd

Creates a version of a function that can process multiple arguments using Single Instruction Multiple Data (SIMD) instructions from a single invocation from a SIMD loop.

omp declare target

Specifies functions and variables that are created or mapped to a device.

omp declare variant

Identifies a variant of a base procedure and specifies the context in which this variant is used.

omp dispatch

Determines if a procedure variant is called for a given procedure.

omp distribute

Specifies that the iterations of one or more loops should be distributed among the initial threads of all thread teams in a league.

omp distribute parallel for

Specifies a loop that can be executed in parallel by multiple threads that are members of multiple teams.

omp distribute parallel for simd

Specifies a loop that will be executed in parallel by multiple threads that are members of multiple teams. It will be executed concurrently using SIMD instructions.

omp distribute simd

Specifies a loop that will be distributed across the primary threads of the teams region. It will be executed concurrently using SIMD instructions.

omp flush

Identifies a point at which a thread's temporary view of memory becomes consistent with the memory.

omp for

Specifies a work-sharing loop. Iterations of the loop are executed in parallel by the threads in the team.

omp for simd

Specifies that the iterations of the loop will be distributed across threads in the team. Iterations executed by each thread can also be executed concurrently using SIMD instructions.

omp interop

Identifies a foreign runtime context and identifies runtime characteristics of that context, enabling interoperability with it.

omp loop

Specifies that the iterations of the associated loops can execute in any order or concurrently.

omp masked

Specifies a structured block that is executed by a subset of the threads of the current team.

omp master (deprecated; see omp masked)

Specifies a code block that must be executed only once by the primary thread of the team.

omp ordered

Specifies a block of code that the threads in a team must execute in the natural order of the loop iterations, or as a stand-alone directive, specifies cross-iteration dependences in a doacross loop-nest.

The following clauses are available as Intel-specific extensions to the OpenMP* specification:

  • ompx_monotonic

    Specifies a block of code in which the value of the new list item on each iteration of the associated SIMD loop(s) corresponds to the value of the original list item before entering the associated loop, plus the number of the iterations for which the conditional update happens prior to the current iteration, times linear-step.

    The value corresponding to the sequentially last iteration of the associated loop(s) is assigned to the original list item. Use with the simd clause.

  • ompx_overlap

    Specifies a block of code that has to be executed scalar for overlapping inx values and parallel for different inx values within SIMD loop. Use with the simd clause.

omp parallel

Specifies that a structured block should be run in parallel by a team of threads.

omp parallel for

Provides an abbreviated way to specify a parallel region containing only a FOR construct.

omp parallel for simd

Specifies a parallel construct that contains one for simd construct and no other statement.

omp parallel sections

Specifies a parallel construct that contains only a sections construct.

omp requires

Lists the features that an implementation must support so that the program compiles and runs correctly.

omp scan

Specifies a scan computation that updates each list item in each iteration of an enclosing SIMD loop nest.

omp scope

Defines a structured block that is executed by all threads in a team but where additional OpenMP* operations can be specified.

omp sections

Defines a set of structured blocks that will be distributed among the threads in the team.

omp simd

Transforms the loop into a loop that will be executed concurrently using SIMD instructions.

The following clause is available as Intel-specific extensions tothe OpenMP* specification:

  • ompx_assert

    Specifies that the compiler generates an error message if the loop is not vectorized for any reason.

omp single

Specifies that a block of code is to be executed by only one thread in the team.

omp target

Creates a device data environment and executes the construct on that device.

omp target data

Maps variables to a device data environment for the extent of the region.

omp target enter data

Specifies that variables are mapped to a device data environment.

omp target exit data

Specifies that variables are unmapped from a device data environment.

omp target parallel

Creates a device data environment and executes the parallel region on that device.

omp target parallel for

Provides an abbreviated way to specify a target construct that contains an omp target parallel for construct and no other statement between them.

omp target parallel for simd

Specifies a target construct that contains an omp target parallel for simd construct and no other statement between them.

omp target parallel loop

Provides an abbreviated way to specify a target region that contains only a parallel loop construct.

omp target simd

Specifies a target construct that contains an omp simd construct and no other statement between them.

omp target teams

Creates a device data environment and executes the construct on the same device. It also creates a league of thread teams with the primary thread in each team executing the structured block.

omp target teams distribute

Creates a device data environment and then executes the construct on that device. It also specifies that loop iterations will be distributed among the primary threads of all thread teams in a league created by a teams construct.

omp target teams distribute parallel for

Creates a device data environment and then executes the construct on that device. It also specifies a loop that can be executed in parallel by multiple threads that are members of multiple teams created by a teams construct.

omp target teams distribute parallel for simd

Creates a device data environment and then executes the construct on that device. It also specifies a loop that can be executed in parallel by multiple threads that are members of multiple teams created by a teams construct. The loop will be distributed across the teams, which will be executed concurrently using SIMD instructions.

omp target teams distribute simd

Creates a device data environment and then executes the construct on that device. It also specifies that loop iterations will be distributed among the primary threads of all thread teams in a league created by a teams construct. It will be executed concurrently using SIMD instructions.

omp target teams loop

Provides an abbreviated way to specify a target region that contains only a teams loop construct.

omp target update

Makes the list items in the device data environment consistent with their corresponding original list items.

omp task

Specifies a code block whose execution may be deferred.

omp taskgroup

Causes the program to wait until the completion of all enclosed and descendant tasks.

omp taskloop

Specifies that the iterations of one or more associated for loops should be executed using OpenMP tasks.

omp taskloop simd

Specifies a loop that can be executed concurrently using SIMD instructions and that those iterations will also be executed in parallel using OpenMP* tasks.

omp taskwait

Specifies a wait on the completion of child tasks generated since the beginning of the current task.

omp taskyield

Specifies that the current task can be suspended at this point in favor of execution of a different task.

omp teams

Creates a league of thread teams inside a target region to execute a structured block in the initial thread of each team.

omp teams distribute

Creates a league of thread teams and specifies that loop iterations will be distributed among the primary threads of all thread teams in the league.

omp teams distribute parallel for

Creates a league of thread teams and specifies that the associated loop can be executed in parallel by multiple threads that are members of multiple teams.

omp teams distribute parallel for simd

Creates a league of thread teams and specifies that the associated loop can be executed concurrently using SIMD instructions in parallel by multiple threads that are members of multiple teams.

omp teams distribute simd

Creates a league of thread teams and specifies that the associated loop will be distributed across the primary threads of the teams and executed concurrently using SIMD instructions.

omp teams loop

Provides an abbreviated way to specify a teams construct that contains only a loop construct.

omp threadprivate

Specifies a list of globally-visible variables that will be allocated private to each thread.

Categories of Supported OpenMP* Pragmas

The following tables show the categories of the supported OpenMP pragmas.

Parallelism

OpenMP* Pragma

Use this pragma to form a team of threads and execute those threads in parallel.

omp parallel

Tasking

OpenMP* Pragmas

Use these pragmas for deferring execution.

omp task

omp taskloop

Worksharing

OpenMP* Pragmas

Use these pragmas to share work among a team of threads.

omp for

omp loop

omp scope

omp sections

omp single

Synchronization

OpenMP* Pragmas

Use these pragmas to synchronize between threads.

omp atomic

omp barrier

omp critical

omp flush

omp masked

omp master (deprecated, see omp masked)

omp ordered

omp taskgroup

omp taskwait

omp taskyield

Data Environment

OpenMP* Pragma

Use this pragma to affect the data environment.

omp threadprivate

Offload Target Control

OpenMP* Pragmas

Use these pragmas to control execution on one or more offload targets.

omp declare target

omp declare variant

omp dispatch

omp distribute

omp interop

omp requires

omp target

omp target data

omp target enter data

omp target exit data

omp target update

omp teams

Use these pragmas to control execution on vector hardware.

Vectorization

OpenMP* Pragmas

Use these pragmas to control execution on vector hardware.

omp scan

omp simd

omp declare simd

Cancellation

OpenMP* Pragmas

Use these pragmas to cancel an innermost enclosing region or to check if cancellation is in effect.

omp cancel

omp cancellation point

User-Defined Reduction

OpenMP* Pragma

Use this pragma to define reduction identifiers that can be used as reduction operators in a reduction clause.

omp declare reduction

Memory Space Allocation

OpenMP* Pragma

Use this declarative directive to allocate memory space.

omp allocate

Combined and Composites

OpenMP* Pragmas

Use these pragmas as shortcuts for multiple pragmas in sequence.

Combined constructs: These are shortcuts for specifying one construct immediately nested inside another construct. This kind of construct is semantically identical to that of explicitly specifying the first construct containing one instance of the second construct and no other statements.

Composite construct: These constructs are composed of two constructs but they do not have identical semantics to specifying one of the constructs immediately nested inside the other. This kind of construct either adds semantics not included in the constructs from which it is composed or the nesting of the one construct inside the other is not conforming.

omp distribute parallel for 1

omp distribute parallel for simd1

omp distribute simd 1

omp for simd1

omp parallel for

omp parallel for simd

omp parallel sections

omp target parallel

omp target parallel for

omp target parallel for simd

omp target parallel loop

omp target simd

omp target teams

omp target teams distribute

omp target teams distribute parallel for

omp target teams distribute parallel for simd

omp target teams distribute simd

omp target teams loop

omp taskloop simd 1

omp teams distribute

omp teams distribute parallel for

omp teams distribute parallel for simd

omp teams distribute simd

omp teams loop

1 This is a composite construct.

Parent topic: Pragmas
Level Two Title