Fortran Language and OpenMP* Features Implemented in Intel® Fortran Compiler

New Fortran 2023 features in this release:

• The half revolution trigonometric functions ACOSPI, ASINPI, ATANPI, ATAN2PI, COSPI, SINPI, and TANPI.
• The RANK clause can appear in a type declaration statement, giving the dimension attribute to pointer, allocatable, and assumed shape objects.
• The IEEE_GET_ROUNDING_MODE, IEEE_GET_UNDERFLOW_MODE, IEEE_SET_ROUNDING_MODE, and IEEE_SET_UNDERFLOW_MODE subroutines in the IEEE_ARITHMETIC intrinsic module are now PURE.
• The IEEE_GET_MODES, IEEE_GET_STATUS, IEEE_SET_MODES, and IEEE_SET_STATUS from the IEEE_EXCEPTIONS intrinsic module are now PURE.

New Features in this release:

• The COTANPI intrinsic function returns the cotangent of its argument, which is expressed in half revolutions.
• The FOR_GET_FPE and FOR_SET_FPE functions in the module IFCORE are now PURE.

New OpenMP features in this release:

OpenMP 6.0

• The OpenMP NOWAIT clause now accepts an optional logical conditional expression argument that determines if the NOWAIT clause is to be honored or ignored.
• The NEED_DEVICE_ADDR adjust-op modifier may appear in an ADJUST_ARGS clause of a DECLARE VARIANT
• The OpenMP 6.0 syntax for the PREFER_TYPE modifier on an INTEROP directive is now supported.

New Fortran 2023 features in this release:

• A data component whose type has a coarray potential subobject component may be an array.
• Intrinsic function SELECTED_LOGICAL_KIND has been implemented.

New Features in this release:

• The IEEE_SCALB (X, I) now permits the I argument to be of type real with the same kind type parameter as the X argument (Fortran 2018 interpretation)
• Option assume inline_cloc causes the compiler to generate inline code for the C_LOC function from the intrinsic module procedure ISO_C_BINDING.  The default is assume noinline_cloc, which treats C_LOC as a call to an external function.

New OpenMP features in this release:

OpenMP 6.0

• The STRIPE loop transformation construct has been implemented.
• The NOWAIT clause now has an optional do-not-synchronize logical argument.

Changes in this release:

• Option fprofile-mf-use has been deprecated.

• See Intel® Compiler Extension Routines to OpenMP* in the Fortran Developer Guide and Reference for more information.

 New in ifx 2025.1.1 Patch release

•  This Patch release contains the latest security and stability enhancements.

• Compiler option-qopenmp-threadprivate(Windows:/Qopenmp-threadprivate)has been removed from the Intel® Fortran Compiler Developer Guide and Reference.  This feature is not currently available.

New Features in ifx 2025.1 

       New Fortran 2023 features

• Changes to the SYSTEM_CLOCK intrinsic have been implemented. All integer arguments must have the same kind type, and be of at least default integer kind. Violation of these restrictions is diagnosed as standard messages when option -stand f2023 (Windows: /stand:f23)or option standard-semantics appears on the command line.
• PUBLIC NAMELIST groups may now contain PRIVATE variables.

New OpenMP features in ifx 2025.1

• OpenMP 6.0
  • The WORKDISTRIBUTE construct divides the associated block of statements into units of work that are each executed once by a thread of the enclosing TEAMS construct. A procedure reference in the associated block, with the exception of a reference to MATMUL with fixed-size array arguments, will inhibit the work-sharing properties of this construct at this time.
  • INTERCHANGE construct reorders loops in a loop nest.

• See Intel® Compiler Extension Routines to OpenMP* in the Fortran Developer Guide and Reference for more information.

New Features in ifx 2025.0  

• The [no]ieee_mode_restore keyword has been added to the assume option.  This enables saving and restoring the IEEE mode flags at call sights as required by the Fortran standard.  The default is assume noieee_mode_restore, which does not save the mode flags prior to a call and does not restore them after the call.
• The standard-semantics option is now sensitive to a standards conformance level set by the stand option.  If no stand option is specified, standard semantics sets options to conform to Fortran 2018 standard behavior.
• The fopenmp-offload-mandatory and  /Qopenmp-offload-mandatory compiler option tells the compiler to generate only a device version of the compiled code and not a host version.
• Option -inline-forceinline (Linux) and /Qinline-forceinline (Windows), which tells the compiler to treat inline routines as forceinline.
• Option -fvec-allow-scalar-stores (Linux) and /Qvec-allow-scalar-stores (Windows), which ensures vectorization of an explicit simd loop.
• You can specify new pure intrinsic subroutines SPLIT and TOKENIZE.

New OpenMP features in ifx 2025.0

• OpenMP 6.0
  • An IF clause allowed on TEAMS construct
• OpenMP 6.0
  • A DEVICE_TYPE clause may now appear on a TARGET construct.
• OpenMP 5.1
  • The DEVICE_TYPE clause may appear on a DECLARE TARGET directive.
• OpenMP 5.1
  • AFFINITY clause is now permitted on a TASK directive.

 Changes

• -check all now behaves as -check all -check nouninit.  Setting -check uninit and linking with libraries not built with this option such as MKL or MPI causes runtime failures, so -check uninit is no longer set by -check all.
• The results of IEEE_MAX_NUM, IEEE_MIN_NUM, IEEE_MAX__NUM_MAG, and IEEE_MIN_NUM_MAG have changed to conform to the Fortran 2023 specification.  If one of the arguments is a NaN, the other argument is returned, while in Fortran 2018 a NaN was returned.  The old behavior is available in the new Fortran 2023 functions IEEE_MAX, IEEE_MIN, IEEE_MAX_MAG, and IEEE_MIN_MAG.  These functions are all defined in the intrinsic module IEEE_ARITHMETIC.
• Previously, a BOZ constant was permitted in an array constructor as an extension, and the BOZ would always be interpreted as an integer value of default kind regardless of the type of the array constructor. To comply with Fortran 2023, in this release, BOZ constants in array constructors with an explicit REAL type-spec are now interpreted as the bits of a REAL value with the same kind as the type-spec. To obtain the old behavior, wrap the BOZ constant in reference to the INT intrinsic function.
• A C string (Intel Fortran extension) containing a NULL character when assigned to an integer variable used to truncate the string at the null character and pad with NULLs.  As of this release, the truncation no longer occurs.