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Lahey/Fujitsu Fortran v7.1

by Lahey Computer Systems

Lahey/Fujitsu Fortran v7.1 is a version of Fortran language that includes support for Visual Studio .NET 2003, Windows & Web Forms Designers, Fortran 2003 extensions, COM and ADO.NET support, .NET and Win32 code templates, Fortran 95 compiler, Pentium 4 / Athlon optimizations, Faster math libraries and much more.

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Fortran 95 (Win32) language system

Speed. Dependability. Great Tech Support. Lahey/Fujitsu Fortran 95.
The standard for Fortran programming from the leader in Fortran language systems.

We've combined our 37 years of producing award-winning Fortran language systems with Fujitsu's compiler expertise and high-performance code generator to deliver the most-productive, best-supported Fortran 95 language system for the PC. Whether you write new Fortran programs or downsize existing applications, you need speed, dependability, and great tech support. You need LF Fortran v7.1!

LF Fortran v7.1 Delivers!
Important features include ...

LF Fortran 95 Performance.
LF Fortran 95 7.1 offers improved execution performance on most Fortran 77 and 90 codes. The new optimizations help performance on Pentium(R) 4 and Xeon(TM) chips. "We tested v7.1 Win32 optimizations on a 2.4GHz P4 with 512 MB of PC2100 RAM, running Windows XP, using Polyhedron?s ( Fortran benchmarks. Specifying the new switches -tp4, -sse2, -zfm, -o2, and -inline the 90 benchmarks ran an average of 15.4% faster and the 77 benchmarks 4.4% faster than they did when built with LF Fortran v7.0."

LF Fortran 95 Optimizations.

Basic Optimization

  • Constant folding
  • Common subexpression elimination
  • Copy propagation
  • Strength Reduction
  • Algebraic simplifications
  • Dead code elimination
  • Peephole optimization
  • Loop invariant code motion
  • Transform array element to simple variable
  • Local Instruction scheduling
  • Address calculation optimization
  • Array optimization
Program Reconstruction Optimizations
  • Loop unrolling
  • Loop interchange
Procedure Optimization
  • Inlining mathematical functions
  • Stack optimization
  • Inline user-defined
  • Pentium/Pentium PRO/Pentium 4 instruction
  • Using fast input/output libraries
  • Prefetch Pentium III / Athlon
  • SSE2 instruction optimizations
  • Enable flush-to-zero mode for SSE2
Statically Link Fujitsu C and VC++ Object Files.
LF Fortran 95 supports static linking with Fujitsu C and Microsoft Visual C++ version 2.0 and greater. Combine your Fortran and C/C++ code into one executable. For the routines you don't want to develop yourself, you can also link with C/C++ routines from commercially available libraries.

DLL Interfaces to Visual Basic, VC++, Borland C++, Delphi, Microsoft .NET languages.
Create 32-bit Windows DLLs from your Fortran routines and call the Fortran routines from 32-bit Windows programs created with Microsoft Visual Basic, Microsoft Visual C++, Borland C++, Borland Delphi, and Microsoft .NET languages.

Win32 API Access.
LF Fortran 95 supports direct calls from Fortran to functions in the Win32 API. For a narrow range of applications, this might be the last little bit of glue you need to pull off your project. Note that this is not for the faint-hearted! You'll need to be a Windows programmer to get all but the most basic functionality. That's because the API was written to be called from C. And consequently, arguments need to be passed as C expects them. Structures and callback routines pose additional problems. Clearly, this would be a difficult way to build a Windows application from scratch.

Legacy Fortran Support.
LF Fortran 95 extends its language support in other directions adding many legacy Fortran features, including VAX structures and the various UNIX service routines. These features further facilitate your move to cost/performance efficiency on the PC platform:

  • Unlimited number of continuation lines in free or fixed source form
  • DO UNTIL statement
  • FIND statement
  • STRUCTURE and END STRUCTURE statements
  • UNION and END UNION statements
  • MAP and END MAP statements
  • RECORD statement
  • Non-standard POINTER statement
  • AUTOMATIC statement
  • STATIC statement
  • VALUE statement
  • BYTE statement
  • Hollerith constants
  • Alternative forms of binary, octal, and hexadecimal constants
  • Binary, octal, or hexadecimal constants in a DATA, declaration statement
  • Period structure component separator
  • Namelist input/output on internal file
  • TOTALREC specifier
  • STATUS = 'SHR'
  • Gw, $, \, and R edit descriptors
  • LOC intrinsic function
ANSI/ISO-Compliant Fortran 95.
LF Fortran 95 is a complete implementation of the ANSI/ISO Fortran 95 standard. Fortran 95 offers some small but important improvements over Fortran 90, including the ability to create your own elemental procedures, default initialization for structure components, the NULL intrinsic for initializing pointers, the FORALL construct, and a standard CPU_TIME intrinsic procedure.

IEEE Standard 754 support
IEEE Standard 754 defines the representation and behavior of 32- and 64-bit floating point numbers. IEEE 754 support provides for consistency of basic computational results among platforms that use IEEE 754. An excellent overview of the standard is presented online by Steve Hollasch at A heavy-duty online discussion of floating point numbers and the standard is provided by David Goldberg at

MATLAB compatibility.
Integration files are provided to support using the LF Fortran 95 compiler within MATLAB. These files provide seamless integration with MATLAB and external API procedures. MATLAB example code should not require any modification when LF Fortran 95 support is enabled.

Visual Studio .NET 2003 Development Environment.

Visual Studio .NET 2003

Visual Studio .NET 2003
Visual Studio .NET 2003 is the industry standard in development environments. The Win32 Visual Studio integration includes project management facilities, project/code templates, on-line integrated help, and Fortran-smart editing.

Win32 Project Types
  • Empty Project (Win32) provides a solution and project without any source files. The user can add items to this project by using the "Project/Add New Item" menu selection.
  • Static Library (Win32) consists of a library project, example subroutine, and function procedures. The user should change the procedure name, function result type, and argument list to suit. If either the function or subroutine is not required, it may be removed. When compiled, this project type creates a library file with the .lib extension, which may be called by other native Fortran 95 applications.
  • Dynamic-Link Library (Win32) consists of a DLL project and example subroutine and function procedures, which are marked for export. The user should change the procedure name and export list, function result type, and argument list to suit. If either the function or subroutine is not required, it may be removed. When compiled, this project type creates a dynamic link library with the .dll extension, which may be called by any application (including .NET managed applications) that can import the procedures.
  • Console Application (Win32) consists of a console project and a skeletal main program. The user should change the program name to suit. When compiled, this project type creates a console application. If this application is invoked from a console, it executes within the console. If the application is invoked from an icon, the Run menu, or Windows Explorer, it creates a console to run in, and destroys the console when the program completes execution.
  • WiSK Simple Application (Win32) this is a project that opens a window, handles a close request, and contains an empty resource file. This project type compiles into a Windows GUI application.
  • WiSK Skeleton Application (Win32) this is a project that opens a window containing a menu, and captures a number of events, such as keydown, mouse button and mouse move events, menu selection, pushbutton, expose and resize events. It contains a resource file which defines menu items. This project type compiles into a Windows GUI application.
Additional Project Types Supplied with Visual Studio
  • Setup and Deployment Project allows the programmer to create installation programs that can ease the task of distributing .NET applications. A setup project packages the files that comprise an application and facilitates the creation of directory structures.
  • Database Project provides a means of manipulating databases and designing and executing SQL scripts and queries without having to create an application.
On-line Integrated Help
The on-line integrated help provides Fortran for .NET installation and getting started instructions, a Fortran for .NET Users Guide, and a Fortran for .NET language reference. It also includes the MSDN Library and Visual Studio SDK help.

Fortran-Smart Editing
The Fortran for .NET language system provides the Visual Studio editor with the smarts to recognize and color-code Fortran language syntax.

Fortran-Smart Windows Debugger
The WinFDB debugger provides a Windows graphical interface for debugging your Fortran code.
Incrementally execute your program - Single step through your program. Step into or over calls to other routines.
Stop on Break Points - Click in the margin of your source code to set break points.
Examine Registers - Open the registers window to examine processor registers and flags.
Visual Step - Visual Step mode allows the user to automatically step through the program at a comprehensible pace.
Watch Variables - Open a watch window to show selected variable values in any active program unit.
Mixed-Language Programs - Debug programs created from LF Fortran 95 and Fujitsu C objects.

Other Development Tools
Complementing the Windows Development Environment, LF Fortran 95 includes the Microsoft's make utility (nmake), Automake make utility; Microsoft's library manager (lib) and Lahey's Library Manager (LM) for building and working with library files; and Microsoft's linker (link).

Winteracter Starter Kit.
Use the Winteracter Starter Kit - WiSK - for creating true Windows programs with Fortran. WiSK is a subset of the Winteracter Library created by Interactive Software Services, Ltd. (Winteracter is available from Lahey.) Winteracter is a Fortran 95-callable, 32-bit, Windows, user-interface and graphics development kit. Derived from Winteracter, WiSK provides a library of subroutines for window management, input handling, dialog management, and high resolution graphics, plus custom versions of the visual menu and dialog designers.

Fujitsu Visual Analyzer.
Fujitsu Visual Analyzer

Visually analyze the call structure and logic flow of your Fortran and C source code. Display a detailed cross reference of all the variables in the program and where modules and commons are defined and referenced. Show C global variable definitions and references as well. VA can help you understand someone else's code, detect subtle programming errors across multiple files, and verify compliance with the Fortran 95 standard.

LF Fortran 95 beta tester Barry Santana says, "Fujitsu Visual Analyzer has been a great help in avoiding conflicts in the modifications. The help that Lahey Technical Support has provided quickly and without hassle has provided this project with a much needed shot in the arm! It has confirmed that my decision to switch to the Lahey compiler was correct. Thanks for all the help."

Fujitsu Scientific Subroutine Library 2.
The Fujitsu Scientific Subroutine Library 2 (SSL2) has been in use for years in Japan on Fujitsu mainframe and workstation hardware. SSL2 offers over 250 optimized routines in the following areas:

Linear Algebra
Matrix Storage Mode Conversion
Matrix Manipulation
Linear Equations and Matrix Inversion (Direct Method)
Least Squares Solution

Eigenvalues and Eigenvectors
Eigenvalues and Eigenvectors of a Real Matrix
Eigenvalues and Eigenvectors of a Complex Matrix
Eigenvalues and Eigenvectors of a Real Symmetric Matrix
Eigenvalues and Eigenvectors of a Hermitian Matrix
Eigenvalues and Eigenvectors of a Real Symmetric Band Matrix
Eigenvalues and Eigenvectors of a Real Symmetric Generalized Eigenproblem
Eigenvalues and Eigenvectors of a Real Symmetric Band Generalized Eigenproblem

Nonlinear Equations
Polynomial Equations
Transcendental Equations
Nonlinear Simultaneous Equations

Minimization of Function with a Variable
Unconstrained Minimization of Multivariable Function
Unconstrained Minimization of Sum of Squares of Functions (Nonlinear Least Squares Solution)
Linear Programming
Nonlinear Programming (Constrained Minimization of Multivariable Function)

Interpolation and Approximation

Discrete Real Fourier Transforms
Discrete Cosine Transforms
Discrete Sine Transforms
Discrete Complex Fourier Transforms
Laplace Transform

Numerical Differentiation and Quadrature

Differential Equations

Special Functions
Elliptic Integrals
Exponential Integral
Sine and Cosine Integrals
Fresnel Integrals
Gamma Functions
Error Functions
Bessel Functions
Normal Distribution Functions

Pseudo Random Numbers
Pseudo Random Generation
Pseudo Random Testing

LF Fortran 95 Specifications

Compiler Switches

-[n]ap Guarantee consistency of REAL and COMPLEX calculations
-[n]blas Link with optimized BLAS library
-block Set default block size for OPEN statements
-[n]c Create object and/or module files without an executable
-[n]chk [] Check substrings and array subscripts, non-common variables accessed before initialization, and mismatched procedure arguments
-[n]chkglobal Generate compiler error messages, and perform full compile and runtime checking
-[n]co Display compiler options
-[n]concc Support carriage control characters in console I/O
-[n]cover Generate information for use by the coverage tool
-[n]dal Deallocate allocatable arrays
-[n]dbl Extend REAL and COMPLEX variables, arrays, constants, and functions to KIND=8
-[n]dll Generate a dynamic link library
-[n]f95 Generate warnings for non-standard Fortran 95
-file Ensure driver interprets file name as name of file and not a switch argument
-[n]fix Interpret source files as Fortran 95 fixed source form
-[n]g Generate debugger information
-i Specify search path for Fortran INCLUDE files
-[n]in Equivalent to including an IMPLICIT NONE statement in each program unit
-[n]info Display informational messages at compile time
-[n]inline [] Inline user-defined procedures
-[n]lapack Link with optimized LAPACK library
-[n]li Avoid recognizing non-standard Lahey intrinsic procedures
-[n]long Extend all default INTEGER variables, arrays, constants, and functions to KIND=8
-[n]lst [] Create source listings
-[n]maxfatals Specify maximum number of fatal errors allowed before stopping compilation
-ml Generate code compatible with other languages
-mldefault Specify default mixed language target
-mod Specify search path for module files
-o Override default object file name
-o0 Optimization level 0 - perform no optimization
-o1 Optimization level 1 - perform full optimization
-o2 -o1 plus loop and array optimizations
-out Specify output file name
-[n]pause Create pause after program completion
-[n]pca Prevent invoked subprograms from storing into constants
-[n]prefetch Generate prefetch optimizations
-[n]private Set default block size for OPEN statements
-[n]quad Extend all double-precision REAL and COMPLEX variables, arrays, rays, constants, and functions to KIND=16
-[n]sav Allocate local variables in a compiler-generated SAVE area
-[n]ssl2 Link with optimized SSL II library
-[n]sse2 Optimize using SSE2 instructions
-[n]staticlib Static or dynamic linkinf of Fortran runtime libraries
-[n]staticlink Statically link with code produced by another supported language system
-[n]stchk Check for stack overflows
-[n]swm Suppress warning messages
-t4 Generate code optimized for Intel 80386 or 80486 processor
-tpp Generate code optimized for Intel Pentium Pro, Pentium II, Pentium III, or Celeron processors, or generic counterparts
-tp4 Generate code optimized for Intel Pentium 4, Xeon, or generic counterparts
-[n]trace Include procedure traceback and line numbers in runtime error messages
-[n]trap Trap numeric data processor (NDP) exceptions at runtime
-[n]unroll [] Control loop unrolling
-[n]varheap [] Allocate local variables on heap
-version Display version and owner information only
-[n]vsw Create a simple console-like Windows GUI application
-[n]w Generate warning messages
-wide Wide fixed form line length
-win Create Windows application
-winconsole Create Windows Console application
-[n]wisk Create application that uses the Winteracter Starter Kit (WiSK)
-[n]wo Generate warning messages for obsolescent Fortran 90 code
-[n]xref [] Create cross-reference listings
-[n]zero Include variables initialized to zero
-[n]zfm Enable flush-to-zero mode for SSE2 instructions

LF Fortran 95 System Requirements

With Visual Studio
  • Processor
    450-megahertz (MHz) Pentium II-class processor,
    600-MHz Pentium III-class processor recommended
  • Operating System
    Visual Studio .NET 2003 can be installed onto any of the following systems:
    • Microsoft Windows© Server 2003
    • Windows XP Professional
    • Windows XP Home Edition
    • Windows 2000 Professional
    • Windows 2000 Server
  • Memory
    • Windows Server 2003:
      160 megabytes (MB) of RAM
    • Windows XP Professional:
      160 MB of RAM
    • Windows XP Home Edition:
      96 MB of RAM
    • Windows 2000 Professional:
      96 MB of RAM
    • Windows 2000 Server:
      192 MB of RAM
  • Hard Disk
    • 900 MB of available space required on system drive, 3.3 gigabytes (GB) of available space required on installation drive
    • Additional 1.9 GB of available space required for optional MSDN Library documentation
  • Drive
    CD-ROM or DVD-ROM drive
  • Display
    Super VGA (1024 x 768) or higher-resolution display with 256 colors
  • Mouse
    Microsoft Mouse or compatible pointing device
Command-line Only
To use LF Fortran 95 without the Visual Studio .NET Fortran Integration:
  • An 80486DX, Pentium series or compatible processor
  • Microsoft Windows XP, 2000, NT 4.0, Me, 98, or 95
  • 32 MB of RAM
  • 35 to 65 MB of available hard disk space on the installation drive, depending on the sub-features selected
Target Operating System LF Fortran 95 applications are compatible with Microsoft Windows XP, 2000, NT 4.0, Me, 98, and 95.
More product information
Fortran for .NET Language System
Fortran 95 (Win32) language system
.NET Whitepaper
Lahey Fortran -C Compiler manual-
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