10. November 2006

DD-HMC.1.0: Initial release


18. January 2007

DD-HMC-1.0.1: Bugfix release

- Corrected a string handling error in the main program run3.c 


21. August 2007

DD-HMC-1.2.0: Major new release

- Included low-mode deflation

- Restructered the simulation program main/run3.c 

- Included a demo program main/run2.c that computes quark propagators
  using the deflated SAP+GCR solver

- Cleaned up the endianness issue; the programs are now fit for both
  little- and big-endian machines

- Added various small improvements and additions, including import
  and export programs for quark fields


29. October 2007

DD-HMC-1.2.1: New release with a few additional functionalities

- Implemented the "chronological inversion method" of 

    R.C. Brower et al., "Chronological inversion method for the Dirac
    matrix in Hybrid Monte Carlo", Nucl. Phys. B484 (1997) 353

  both on the HMC blocks and for the calculation of the block-interaction 
  force

- Added inline-assembly code for IBM BlueGene computers with "double hummer"
  processors (contributed by Bjoern Leder and Rainer Sommer)

- Corrected various check programs


15. September 2008

DD-HMC-1.2.2: New release with small corrections and improvements

- Made the code comply with the requirements of strict prototyping and
  strict aliasing

- Introduced a new counter for permanent MPI tags to exclude accidentally
  matching tags when the tag counter wraps around

- Corrected the error_loc() function so as to safely exclude a buffer
  overflow if very large error messages are passed

- Corrected the compression of the flags data base when the flags counter 
  wraps around in a very long run

- Reduced the SSE register pressure in the modules linsolv/cgne.c and 
  update/staples.c  so that they now also compile under OS X without the 
  -fomit-frame-pointer compiler option

- Now always use the return value of scanf(), fwrite() and fread() (newer
  versions of gcc complain). Replaced scanf() by the safer read_line()
  program in all programs in the devel directories

- Applied various small corrections to the documentation

- Completed clobber lists in sse.h and sse2.h

- Improved timing programs in the directories devel/dirac and devel/linalg
  so as to exclude misleading cache effects

- Removed a small bug in the module sarchive.c which could cause a 
  segmentation fault if there is only 1 MPI process

- Corrected the modules scom.c and sdcom.c so that the IBM compiler
  does not issue any warnings if there is only 1 MPI process