**NOTE** : this repository is a copy of https://github.com/sbacchio/DDalphaAMG (soon to be embedded within it). We have improved the coarsest-level solves here by moving from plain GMRES to GCRO-DR + Polynomial Preconditioner + Pipelining + Block Jacobi (the BJ blocks are solved through a local polynomial preconditioner). The use of MPI, OpenMP and SSE vectorization is kept throughout these new implementations. For more information on these coarsest-level improvements, contact : g.ramirez@stimulate-ejd.eu --------------------------- The DDalphaAMG solver library is an inverter for Wilson-Clover fermions from lattice QCD. This is the branch sbacchio/master: it includes the twisted mass fermions and a personalized version of the library. INSTALL: The main directory contains a makefile example. The standard makefile should work with a few adjustments (compiler and MPI library) on the machine of your choice. Please note, that the code was built in a generic manner. Thus, the actual code for compilation is created by the makefile via pattern substitution right before the compilation. This part of the makefile should not be removed. Once the necessary adjustments of the makefile are done, the command "make -f yourmakefile -j numberofthreads wilson" should compile the whole entire Wilson solver code, such that it is ready to be run. The makefile contains additional rules "library" and "documentation" for compiling the code as a library and for compiling the user documentation. the library interface can be found in the "include" folder. HOWTO: After having compiled the user documentation via "make documentation" please consult the compiled PDF in /doc for further information.