ARMAS - Another Rewrite of Matrix Algebra Subroutines

Simple column major matrix package and basic linear algebra subroutine (BLAS) implementation with selected functionality from LAPACK linear algebra package.

This library aims for single code base implementation of single and double precision real and complex versions of all supported functions. The implementation is inspired by libFLAME.

BLAS code supports

• level 1, 2 and 3 BLAS
• multi-threaded implementation of BLAS3 functions
• SIMD accelerated for x86_64
• extended presicion versions of most BLAS functions. Implementation based on error free transformations as descripted by Ogita 2005.
• configurable blocking parameters for BLAS3 functions

LAPACK functions

• unblocked and blocked versions with configurable blocking factor
• provides following factorization and solvers
  • QR family (QR, LQ, QL and RQ)
  • LU with partial pivoting
  • Cholesky
  • Bunch-Kaufman LDL factorization of symmetric matrices
  • SVD factorization
  • Symmetric EVD
• other functionality
  • Hessenberg reduction
  • Bidiagonal reduction
  • Tridiagonal reduction
  • Givens rotations
  • Random Butterfly transformations

Currently tested only for single and double precision real numbers.

Building from sources

For compiling and installing from GitHub tree. Compiles with gcc 5.x and gcc 6.x.

  $ ./bootstrap.sh
  $ mkdir build
  $ cd build
  $ ../configure CFLAGS=-O3
  $ make
  $ sudo make install

To run some tests and see tests directory.

  $ make check

Building documentation

Requires doxygen installed. Documentation created on html subdirectory.

$ cd build/docs
$ make
$ doxygen

Some numbers

For some performance numbers see file numbers.txt

Using

Matrix interfaces provide a simple column major matrix implementation. See test programs under tests subdirectory.