Advanced optimizing compiler for IBM Power Systems running Linux distributions
No-charge, fully functional Community Edition
IBM® XL Fortran for Linux is a standards-based, high-performance Fortran compiler with advanced optimization and performance-tuning features. It enables the development of parallel applications that exploit the latest IBM POWER8® processor with multi-core and vector features. XL Fortran for Linux optimizes your infrastructure on IBM Power Systems™ in support of extensive numerical, scientific and high-performance computing.
IBM XL Fortran for Linux delivers:
- Support for a commonly used subset of CUDA Fortran to enable applications to exploit the NVIDIA GPUs.
- A single XL Fortran offering for both big endian and little endian Linux distributions.
- (Little endian) Offers an unlimited license, no-charge, fully functional Community Edition for developer use. Download the Community Edition.
- Leading-edge optimization and performance tuning technology that takes advantage of hardware advancements in Power Systems™, including the latest IBM POWER8 technology.
- High-performance libraries that are specifically tuned for the POWER® architecture, including IBM Mathematical Acceleration Subsystem and Basic Linear Algebra Subprograms libraries.
- Profile-driven optimization with monitoring code used to generate a runtime profile, helping to tune application performance.
- Language standard compliance for adherence with the latest international programming language standards, including Fortran 2003, a subset of the Fortran 2008 standard and language interoperability standards.
- Enables ease of application acceleration using OpenMP 4.5
Support for a commonly used subset of CUDA Fortran
- XL Fortran for Linux, V15.1.5 for little endian distributions supports a commonly used subset of the CUDA Fortran constructs.
- Increases the computing performance of many applications by using CUDA directly or by linking to GPU-accelerated libraries.
A single XL Fortran offering for both big endian and little endian Linux distributions
- XL Fortran for Linux comes in single packages that contain compilers to run on either little endian or big endian modes for selected Linux distributions.
- XL Fortran for Linux for little endian distributions supports these platforms: Ubuntu Server 14.04, 14.10, and 16.04, SLES 12, SLES 12 SP1, RHEL 7.1, RHEL 7.2, RHEL 7.3, and CentOS 7. With the little endian XL Fortran compiler, you can create and port Fortran applications for execution on IBM systems built on the POWER8 technology.
- XL Fortran for Linux for big endian distributions supports these platforms: RHEL 6, RHEL 7, and SLES 11.
(Little endian) Offers an unlimited license, no-charge, fully functional Community Edition
- Provides a no-charge, fully functional Fortran compiler for developers who do not require official IBM support.
- Embodies all features of the fully warranted XL Fortran for Linux compiler.
- XL Fortran for Linux Community Edition is not warranted and does not include any subscription, service or support. Consider licensing the full XL Fortran for Linux compiler to obtain full warranty and world-class IBM support.
Leading-edge optimization and performance tuning technology
- Supports systems with processor architectures that execute single instruction, multiple data (SIMD) instruction sets, including vector multimedia extension (VMX) instructions and the POWER8 vector scalar extension (VSX) instruction set.
- Delivers full support of OpenMP 3.1 and partial support for OpenMP 4.5 to enable parallel application development and simplify data and task parallelism.
- Supports profile-driven optimization.
- Supports automatic parallelization of sequential programs to optimize the power of multi-core processors.
- The math libraries are highly tuned for the POWER architectures and offer both the scalar and vector versions.
- Mathematical Acceleration Subsystem (MASS) consists of libraries of mathematical intrinsic functions tuned specifically for optimum performance on POWER architectures.
- Basic Linear Algebra Subprograms (BLAS) consists of libraries of high-performance algebraic functions, performing combined matrix multiplication and addition on general matrices or their transposes, and compute the matrix-vector product for a general matrix or its transpose.
- Profile-directed feedback optimization collects information about a program run with typical input data and then applies transformations to the program based on that information.
- Profile-directed feedback can ensure the performance of the application is optimized for its important inputs.
- Application profile monitoring and profile directed feedback capabilities minimize the need for manual tuning to achieve desirable performance on large, complex applications.
Language standard compliance
- Supports FORTRAN 77, Fortran 90, Fortran 95, Fortran 2003 and a subset of the Fortran 2008 standard.
- Supports a subset of Technical Specification 29113 for further interoperability of Fortran with C.
- Helps to protect investments in existing Fortran source and object code built with previous versions of the compilers, allowing users to rebuild and link all the components into the same applications using the latest compiler versions.
- Supports compatibility of object code or libraries compiled with previous versions of XL Fortran with the newest XL Fortran compiler and runtime environment.
- Supports industry-compliant Fortran language standards for application portability.
Enables ease of application acceleration using OpenMP 4.5
- Applications can accelerate by offloading computation and data to the NVIDIA GPUs.
- A number of OpenMP 4.5 features are supported.
- Thread affinity policy features are supported.
XL Fortran for Linux resources