Objectives

Our main objective is to optimize compute/data intensive programs, to narrow the peak versus sustained performance gap on modern architectures.

To do so, we are working on high level program transformations, using an iterative, feedback directed compilation framework.

Detailed Informations

Efficient code generation for automatic parallelization and optimization.
C. Bastoul.
ISPDC'03 IEEE International Symposium on Parallel and Distributed Computing, to appear in IEEE proceedings, Ljubljana, october 2003.
Putting Polyhedral Loop Transformation to Work.
C. Bastoul, A. Cohen, S. Girbal, S. Sharma, O. Temam.
In: Workshop on Languages and Compilers for Parallel Computing (LCPC'03). College Station, Texas, october 2003.
[PS]
Generating loops for scanning polyhedra.
C. Bastoul.
Technical Report 2002/23, PRiSM, Versailles University, 2002.
A Polyhedral Approach to Ease the Composition of Program Transformations.
A. Cohen, S. Girbal, O. Temam.
In: Euro-Par'04. Pisa, Italy, August 2004.
[PS]
Facilitating the search for compositions of program transformations.
A. Cohen, S. Girbal, D. Parello, M. Sigler, O. Temam et N. Vasilache.
In: ACM Int. Conf. on Supercomputing (ICS'05). Boston, Massachusetts, June 2005.
[PS]

Tool	Description
Quiver	Library for containers (Lists, vectors, matrixes,...) An alternative to the STL with better portability.
WRaP-IT	Whirl Represented as Polyhedra - Interface Tool WRaP extraction tool (WHIRL → WRaP)
URUK	Unified Representation Unified Kernel Tool applying transformations to the WRaP (WRaP → WRaP)
PolyDeps	Polyhedral Dependencies A way to check data dependencies within the WRaP.
UrGenT	Uruk GeneraTor Uruk code generator (WRaP → WHIRL)

We are currently working on building new release with some new tools. They will be available in a few days.

Software	Description	File	Homepage
PolyLib	A library of polyhedral functions	polylib-5.20.0.tar.gz (1.32MB)	homepage
PipLib	Parametric integer linear programming solver	piplib-1.3.3.tar.gz (210.91KB)	homepage
ORC	Open Research Compiler for Itanium™ Processor Family Patched to support gcc-3.3, patched to support uruk labels	orc-2.1-patched.tar.gz (42.60MB)	homepage
Open64 Alchemy	An Open64 compiler based on Pathscale Ekopath™ compiler suite for AMD64 and EM64T Patched to support uruk labels. (has been removed from this website for some license issues)	(not found)	homepage

Release date	Link
7th June 2005	polyhedral-7-jun-2005.tar.gz (454.10KB)