Intel® Fortran Compiler Classic (ifort) is now deprecated and will be discontinued in October 2024. Intel recommends that customers transition now to using the LLVM-based Intel® Fortran Compiler (ifx) for continued Windows* and Linux* support, new language support, new language features, and optimizations.
For the latest information on transitioning from ifort to ifx, see the Porting Guide for ifort Users to ifx.
The Intel® Fortran Compiler Classic and Intel® Fortran Compiler provide optimizations that help your applications to run faster on Intel® 64, and IA-32 architectures, with support for the latest Fortran language standards. This compiler produces optimized code that can run significantly faster by taking advantage of the ever-increasing core count and vector register width in Intel® Xeon® processors and compatible processors. The Intel® Compiler will help you boost application performance through superior optimizations and Single Instruction Multiple Data (SIMD) vectorization, integration with Intel® Performance Libraries, and by leveraging the OpenMP* 5.0/5.1 parallel programming model.
Start using the compiler from the command line or within Microsoft Visual Studio*.
The Intel® Fortran Compiler (ifx) is a new compiler based on the Intel® Fortran Compiler Classic (ifort) frontend and runtime libraries, using LLVM backend technology. At this time, ifx supports features of the Fortran 95 language, and most OpenMP 5.0/5.1 directives and offloading features. ifx is binary (.o/.obj) and module (.mod) file compatible; binaries and libraries generated with ifort can be linked with binaries and libraries built with ifx, and .mod files generated with one compiler can be used by the other. Both compilers use the ifort runtime libraries.
The -fp-model fast and -fp-model fast=2 options behave differently with ifx and ifort. With ifort, floating point compares happen as specified by the IEEE floating point standard, in that the code sequence generated for them assumes a compare can involve a NaN. ifx does not generate the check for NaN operands. If using -fp-model fast or -fp-model fast=2 with ifx and NaN compares are desired to match ifort's behavior, the -assume nan_compare option should be added to the command line.Explore the complete list of oneAPI code samples in the oneAPI Samples Catalog (GitHub*). These samples were designed to help you develop, offload, and optimize multiarchitecture applications targeting CPUs, GPUs, and FPGAs.
| Document | Description |
|---|---|
Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference |
The Developer Guide and Reference contains information on:
|
| Explore tutorials, training materials, and other Fortran documentation. | |
Intel® Fortran Compiler Classic and Intel® Fortran Compiler Release Notes |
Information on product installation, new and changed features, and issues that are not described in the product documentation. |
Ask questions and find answers in the Intel® Fortran Compiler forum. |
|
Add oneAPI components to a Yocto project build using the meta-intel layers. |
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This software and the related documents are Intel copyrighted materials, and your use of them is governed by the express license under which they were provided to you (License). Unless the License provides otherwise, you may not use, modify, copy, publish, distribute, disclose or transmit this software or the related documents without Intel's prior written permission.
This software and the related documents are provided as is, with no express or implied warranties, other than those that are expressly stated in the License.
Intel optimizations, for Intel compilers or other products, may not optimize to the same degree for non-Intel products.