Changelog. A lot less detailed than usual, at least for past history. 2006/12/05: Taken out extra interfaces; inserted use modules with ONLY clauses where appropriate. 2006/11/30: Fixed a bug in raw aggregation. Note: raw aggregation gives different results from smoothed with omega=0.0, because in the latter we have explicitly stored zero coefficients that would be absent in the first, thus generating different ILU factorizations. 2006/11/28: Merged the mods for descriptors of large index spaces to avoid having the GLOB_TO_LOC array. Took the chance to reorganize the descriptor build routines and define some access functions for descriptor features and entries, so as not to use the descriptor components directly. Tested with AS, 2- and 3- level Post smoothers. 2006/11/09: The allocatable version works, but under gcc42 there is a compiler bug when using -fbounds-check. 2006/11/08: Merged the allocatable version; hope everything works! 2006/11/08: Branched version psblas2-2-0-maint, and defined tag 2.0.2.6 2006/11/02: Done in the allocatable branch: repackaging of cdasb and friends, taking out AVL trees where they were not absolutely needed, and new dcsrmv routine. 2006/11/01: Merged changes in the handling of data exchange. 2006/10/03: Merged in the multilevel preconditioner stuff. This is still experimental, especially the interfaces are not stable yet. 2006/10/03: Declared version 2.0.2.5 for reference purposes. 2006/10/03: Fixed a bunch of minor bugs, incuding the sorting routines imsr and imsrx. Added a default call to blacs_exit inside psb_exit fixed a bad termination in test/pargen/ppde90.f90 2006/09/02: Declared version 2.0.2, after having fixed a lot of details in the environment routines. 2006/07/25: Defined a new psb_wtime function. Modified precset to have a non-optional INFO dummy argument. 2006/07/06: Fixed bug in swaptran. Added psb_krylov generic interface. 2006/07/04: Ooops, the GetRow mod in SMMP is a performance hit. Need to investigate further. 2006/06/21: Bug fix in hb_read when dealing with symmetric matrices. 2006/06/20: Rewritten symbmm and numbmm from SMMP to be intependent of CSR storage by using GetRow. Still need to test for performance. 2006/06/16: Defined GetRow. This way we may close the mat objects. Next we will rewrite SMMP to only make use of GetRow, not to rely on CSR storage format. 2006/05/29: Added BLACS-like routines for data communication, broadcasts, reductions, send/receive. 2006/05/25: Added environment management routines. 2006/05/03: Bug fixes, plus some change in the internals for SPINS, preparing hooks for insertion with local numbering. 2006/04/24: Minor changes to the interface of dense tools routines, trying to achieve a uniform look & feel. Rewritten documentation; it is now reasonable, though not perfect, except for the preconditioner routines. We can now declare RC3. 2006/04/21: A bunch of fixes related to various matrix initialization problems that were revealed while testing on SP5. 2006/04/18: Changed interface to spasb and csdp: better handling of regeneration. To be tested further for sophisticated uses. 2006/03/31: We declare RC2 now. Improved I/O routines in test/Fileread. 2006/03/24: We have a complex version now, working (not necessarily bug free). 2006/03/15: Started move to complex version. 2006/03/01: Complete restructure of PREC section. 2006/02/01: New naming scheme. 2006/01/01: New multilevel preconditioning wih smoothed aggregation. 2005/09 : Now enabled UMFPACK complete factorization as basis for AS. 2005/05/04: Now enabled SuperLU complete factorization as basis for AS. 2005/04/29: First version with decoupled 2-level. 2005/04/06: Started work on decoupling the preconditioner aggregation for 2-level from the main factorization. 2005/03/30: First version of new DSC/SP allocate/insert/assembly routines. 2005/03/17: First version of RGMRES. To be refined. 2005/03/08: dSwapTran aligned with dSwapData. Taken out SwapOverlap. also moved onto iSwapX. 2005/03/07: dSwapData rewritten to achieve: 1. better performance; 2. more flexible functionality. It is now possible to avoid SwapOvrlap entirely, relying on just SwapData. SwapTran is still alive, since it reads the descriptors in "transpose" mode. Also, added work areas to preconditioner routine, to avoid excessive allocation in the halo/overlap exchange. 2005/03/04: Had to put in a workaround for a gfortran bug: tolower/toupper cannot be functions. 2005/02/09: Explicit storage choice for the smoother. This seems to be changing a little bit the actual preconditioner. To be evaluated further. 2005/02/08: Renamed F90_PSPREC to PSB_PRCAPLY and Preconditioner to PSB_PRCBLD. Changed the way PRCAPLY decides what to do. Still needs a PSB_PRCSET to be called before PRCBLD. 2005/01/28: Started moving functionalities to a SERIAL F90 layer. Also defined a new COMM layer, to enable implementing SPMM directly in F90. 2005/01/20: Finally taken out a direct call to the F77 DCSDP from SPASB. 2005/01/18: After much work, we now have 2-level Additive Schwarz prototype implemented and working. We now start a major code cleanup that will take some time. Mainly we want to move a lot of the serial F77 functionality into a new F95 serial layer, to simplify the parallel F95 code. 2004/11/25: Following the introduction of Additive Shwarz and variants, we have now renamed DECOMP_ and friends as DESC_; this makes things more readable. Sooner or later we're going to merge this into mainline, but this version is still very much in a state of flux. 2004/07/18: For use with gfortran we need to declare the pointer components with NULL() initialization. This rules out VAST and PGI. 2004/07/15: First development version with gfortran from the current snapshot of gcc 3.5.0. It is now possible in PSI_dSwapData to opt for SEND|RECEIVE|SYNC data exchange; plan is to extend to all data exchange functions, plus making it available as an option from the F90 level. 2004/07/06: Merged in a lot of stuff coming mainly from the ASM development; full merge will have to wait a little more. Among other things: use of psimod new choice parms for overlap new data exchange for swapdata, to be extended. multicolumn CSMM. use psrealloc new format for marking a matrix as suitable for update. 2003/12/09: Changed DSALLOC and DSASB to make sure whenever a dense matrix is allocated it is also zeroed out. 2003/10/13: Added call to BLACS_SET in the solvers to ensure global heterogeneous coherence in the combine operations. 2003/09/30: Added LOC_TO_GLOB and GLOB_TO_LOC support routines. 2003/09/30: Changed interface for smart update capabilities: choose with optional parameters in ASB routines. 2003/09/16: IFC 7.0 had a strange behaviour in the test programs: sometimes the declaration of PARTS dummy argument with an INTERFACE would not work, requiring an EXTERNAL declaration. The proper INTERFACE works now with 7.1. 2003/03/10: Halo data exchange in F90_PSHALO can now be applied to integer data; create appropriate support routines. 2002/12/05: Initial version of Fileread sample programs. 2002/11/19: Fixes for JAD preconditioner. 2002/11/19: Methods for patterns: create a descriptor without a matrix. 2001/11/16: Reviewed the interfaces: in the tools section we really need the POINTER attribute for dense vectors, but not in the computational routines; taking it out allows more flexibility. 2001/09/16: Smart update capabilities. 2001/03/16: Renumbering routines. 2001/01/14: Added extensions to compute multiple DOTs and AMAXs at once;