QCDF90 - LATTICE QCD WITH FORTRAN-90

We have used Fortran 90 to implement lattice QCD. We have designed a s et of machine-independent modules that define fields (gauge, fermions, scalars, etc.) and overloaded operators for all possible operations b etween fields, matrices and numbers. With these modules it is very sim ple to write high-level efficient programs for QCD simulations. To inc rease performance our modules also implements assignments that do not require temporaries, and a machine-independent precision definition. W e have also created a useful compression procedure for storing the lat tice configurations, and a parallel implementation of the random gener ators. We have widely tested our program and modules on several parall el and single processor supercomputers obtaining excellent performance .