SIFDecode

A package to decode SIF optimization test examples for use by CUTEst and GALAHAD

Installation

Precompiled library and executables

We provide a precompiled SIFDecode library and executables in the releases tab for Linux, macOS (Intel & Silicon) and Windows.

Installation from source

SIFDecode can be installed using the Meson build system (all commands below are to be run from the top of the source tree):

meson setup builddir
meson compile -C builddir
meson install -C builddir
meson test -C builddir

SIFDecode can also be installed via the "make" build system based on ARCHDefs. To use this variant, follow the instructions in the CUTEst wiki.

Where to find SIF files

A large collection of SIF files can be found at https://bitbucket.org/optrove/workspace/repositories/. In particular this contains:

• The CUTEst NLP test set in the sif repository
• The Maros-Meszaros QP test set in the maros-meszaros repository
• The Netlib LP test set in the netlib-lp repository

The test problems are classified according to the CUTE classification scheme.

How to decode a SIF file

Since the release v2.5.1, an executable sifdecoder_standalone is available and allows you to easily decode SIF files on any platform.

sifdecoder_standalone -h  # display the options
sifdecoder_standalone -sp ROSENBR.SIF  # decode the SIF problem in single precision
sifdecoder_standalone -dp ROSENBR.SIF  # decode the SIF problem in double precision
sifdecoder_standalone -qp ROSENBR.SIF  # decode the SIF problem in quadruple precision

Then, you can create either a shared or a static library for your problem using a Fortran compiler, such as gfortran.

gfortran -shared -fPIC -o libROSENBR.so *.f     # shared library on Linux and FreeBSD
gfortran -shared -fPIC -o libROSENBR.dll *.f    # shared library on Windows
gfortran -shared -fPIC -o libROSENBR.dylib *.f  # shared library on Mac

gfortran -c *.f  # generate object files *.o
ar rcs libmylibrary.a *.o  # static library on all platform

A bash script sifdecoder can also be used with additional options but is less interoperable.