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

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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 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
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 Code Generation Options Interprocedural Optimization Options Advanced Optimization Options Profile Guided Optimization Options Optimization Report Options Offload Compilation, OpenMP*, and Parallel Processing 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
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
Interprocedural Optimization Options x
flto ipo, Qipo
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 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 qtbb, Qtbb unroll, Qunroll vec, Qvec vec-threshold, Qvec-threshold vecabi, Qvecabi
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
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-loopopt, Qopenmp-target-loopopt fopenmp-target-simd, Qopenmp-target-simd fopenmp-targets, Qopenmp-targets fsycl 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-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
Floating-Point Options x
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 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 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 link 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 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 on Linux Manage Libraries Redistribute Libraries When Deploying Applications Resolve References to Shared Libraries Redistributable Library Considerations Sanitizers 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 Intel-Supported Pragma Reference
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 Intel® oneAPI DPC++/C++ Compiler Math Library
OpenMP* Support x
Add OpenMP* Support Parallel Processing Model Worksharing Using OpenMP* Control Thread Allocation OpenMP* Pragmas 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
Intel® oneAPI DPC++/C++ Compiler Math Library x
Use the Intel® oneAPI DPC++/C++ Compiler Math Library Math Function List Trigonometric Functions acos acosd acospi asin asind asinpi atan atan2 atan2pi atand atan2d atand2 atanpi cos cosd cospi cot cotd sin sincos sincosd sind sinpi tan tand tanpi Hyperbolic Functions Exponential Functions Special Functions Nearest Integer Functions Remainder Functions Miscellaneous Functions Complex Functions C99 Macros
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

Trigonometric Functions

Many routines in the Intel® oneAPI DPC++/C++ Compiler Math Library are more optimized for Intel® microprocessors than for non-Intel microprocessors.

The mathimf.h header file includes prototypes for Intel® oneAPI DPC++/C++ Compiler Math Library functions.

The math library supports the following trigonometric functions:

NOTE:

FP16 Math Functions have the following requirements:

  • Version 2021.4 or higher of the Intel® oneAPI DPC++/C++ Compiler.

  • A next-generation Intel® Xeon® Scalable processor, code name Sapphire Rapids.

acos

Description: The acos function returns the principal value of the inverse cosine of x in the range [0, pi] radians for x in the interval [-1,1].

errno: EDOM, for |x| > 1

Calling interface:
double acos(double x);
long double acosl(long double x);
float acosf(float x);
_Float16 acosf16(_Float16 x);

acosd

Description: The acosd function returns the principal value of the inverse cosine of x in the range [0,180] degrees for x in the interval [-1,1].

errno: EDOM, for |x| > 1

Calling interface:
double acosd(double x);
long double acosdl(long double x);
float acosdf(float x);
_Float16 acosdf16(_Float16 x);

acospi

Description: The acospi function returns the principal value of the inverse cosine of x, divided by pi, in the range [0,1] for x in the interval [-1,1].

errno: EDOM, for |x| > 1

Calling interface:
double acospi(double x);
float acospif(float x);
_Float16 acospif16(_Float16 x);

asin

Description: The asin function returns the principal value of the inverse sine of x in the range [-pi/2, +pi/2] radians for x in the interval [-1,1].

errno: EDOM, for |x| > 1

Calling interface:
double asin(double x);
long double asinl(long double x);
float asinf(float x);
_Float16 asinf16(_Float16 x);

asind

Description: The asind function returns the principal value of the inverse sine of x in the range [-90,90] degrees for x in the interval [-1,1].

errno: EDOM, for |x| > 1

Calling interface:
double asind(double x);
long double asindl(long double x);
float asindf(float x);
_Float16 asindf16(_Float16 x);

asinpi

Description: The asinpi function returns the principal value of the inverse sine of x, divided by pi, in the range [-1/2,1/2] degrees for x in the interval [-1,1].

errno: EDOM, for |x| > 1 divided by pi

Calling interface:
double asinpi(double x);
float asinpif(float x);
_Float16 asinpif16(_Float16 x);

atan

Description: The atan function returns the principal value of the inverse tangent of x in the range [-pi/2, +pi/2] radians.

Calling interface:
double atan(double x);
long double atanl(long double x);
float atanf(float x);
_Float16 atanf16(_Float16 x);

atan2

Description: The atan2 function returns the principal value of the inverse tangent of y/x in the range [-pi, +pi] radians.

errno: EDOM, for x = 0 and y = 0

Calling interface:
double atan2(double y, double x);
long double atan2l(long double y, long double x);
float atan2f(float y, float x);
_Float16 atan2f16(_Float16 y, _Float16 x);

atan2pi

Description: The atan2pi function returns the principal value of the inverse tangent of y/x, divided by pi, in the range [-1, +1].

errno: EDOM, for x = 0 and y = 0

Calling interface:
double atan2pi(double y, double x);
float atan2pif(float y, float x);
_Float16 atan2pif16(_Float16 y, _Float16 x);

atand

Description: The atand function returns the principal value of the inverse tangent of x in the range [-90,90] degrees.

Calling interface:
double atand(double x);
long double atandl(long double x);
float atandf(float x);
_Float16 atandf16(_Float16 x);

atan2d

Description: The atan2d function returns the principal value of the inverse tangent of y/x in the range [-180, +180] degrees.

errno: EDOM, for x = 0 and y = 0.

Calling interface:
double atan2d(double x, double y);
long double atan2dl(long double x, long double y);
float atan2df(float x, float y);
_Float16 atan2df16(_Float16 x, _Float16 y);

atand2

Description: The atand2 function returns the principal value of the inverse tangent of y/x in the range [-180, +180] degrees.

errno: EDOM, for x = 0 and y = 0.

Calling interface:
double atand2(double x, double y);
long double atand2l(long double x, long double y);
float atand2f(float x, float y);
_Float16 atand2f16(_Float16 x, _Float16 y);

atanpi

Description: The atanpi function returns the principal value of the inverse tangent of x, divided by pi, in the range [-1/2, +1/2].

Calling interface:
double atanpi(double x);
float atanpif(float x);
_Float16 atanpif16(_Float16 x);

cos

Description: The cos function returns the cosine of x measured in radians.

Calling interface:
double cos(double x);
long double cosl(long double x);
float cosf(float x);
_Float16 float cosf16(_Float16 x);

cosd

Description: The cosd function returns the cosine of x measured in degrees.

Calling interface:
double cosd(double x);
long double cosdl(long double x);
float cosdf(float x);
_Float16 cosdf16(_Float16 x);

cospi

Description: The cospi function returns the cosine of x multiplied by pi, cos(x*pi).

Calling interface:
double cospi(double x);
float cospif(float x);
_Float16 cospif16(_Float16);

cot

Description: The cot function returns the cotangent of x measured in radians.

errno: ERANGE, for overflow conditions at x = 0.

Calling interface:
double cot(double x);
long double cotl(long double x);
float cotf(float x);
_Float16 cotf16(_Float16 x);

cotd

Description: The cotd function returns the cotangent of x measured in degrees.

errno: ERANGE, for overflow conditions at x = 0.

Calling interface:
double cotd(double x);
long double cotdl(long double x);
float cotdf(float x);
_Float16 cotdf16(_Float16 x);

sin

Description: The sin function returns the sine of x measured in radians.

Calling interface:
double sin(double x);
long double sinl(long double x);
float sinf(float x);
_Float16 sinf16(_Float16 x);

sincos

Description: The sincos function returns both the sine and cosine of x measured in radians.

Calling interface:
void sincos(double x, double *sinval, double *cosval);
void sincosl(long double x, long double *sinval, long double *cosval);
void sincosf(float x, float *sinval, float *cosval);
void sincosf16(_Float16 x, _Float16 *sinval, _Float16 *cosval);

sincosd

Description: The sincosd function returns both the sine and cosine of x measured in degrees.

Calling interface:
void sincosd(double x, double *sinval, double *cosval);
void sincosdl(long double x, long double *sinval, long double *cosval);
void sincosdf(float x, float *sinval, float *cosval);
void sincosdf16(_Float16 x, _Float16 *sinval, _Float16 *cosval);

sind

Description: The sind function computes the sine of x measured in degrees.

Calling interface:
double sind(double x);
long double sindl(long double x);
float sindf(float x);
_Float16 sindf16((_Float16 x);

sinpi

Description: The sinpi function returns the sine of x multiplied by pi, sin(x*pi).

Calling interface:
double sinpi(double x);
float sinpif(float x);
_Float16 sinpif16(_Float16 x);

tan

Description: The tan function returns the tangent of x measured in radians.

Calling interface:
double tan(double x);
long double tanl(long double x);
float tanf(float x);
_Float16 tanf16(_Float16 x);

tand

Description: The tand function returns the tangent of x measured in degrees.

errno: ERANGE, for overflow conditions

Calling interface:
double tand(double x);
long double tandl(long double x);
float tandf(float x);
_Float16 tandf16(_Float16 x);

tanpi

Description: The tanpi function returns the tangent of x multiplied by pi, tan(x*pi).

Calling interface:
double tanpi(double x);
float tanpif(float x);
_Float16 tanpif16(_Float16 x);

Parent topic: Intel® oneAPI DPC++/C++ Compiler Math Library
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