Matrix Algebra proGrams In Common Lisp by Rigetti Computing. (née FLAIL: Finally, Linear Algebra In Lisp!)
(Note: The high-level interface is experimental and subject to rapid change.)
- SBCL (> 1.3.19) or CCL (>= 1.11) on AMD64
- BLAS and LAPACK
Detailed instructions on how to install
libffi and BLAS/LAPACK can
be found here.
Currently this library is SBCL- and CCL-only. The non-portable code
First ensure you have the necessary requirements installed, as described in the previous section.
To install MAGICL, clone this repository into your Quicklisp's
local-projects folder. You can quickly check where this is by
sbcl and evaluating
installed, confirm that MAGICL is working properly by running the
tests, as described in the next section.
You can run the MAGICL tests from your Lisp REPL with:
(ql:quickload :magicl-tests) (asdf:test-system :magicl)
Showing Available Functions
Some distributions of a library don't actually provide all of the functions of the reference BLAS and LAPACK. One can look at a summary of available and unavailable functions with the function
magicl:print-availability-report. By default, it will show all functions and their availability. There are three arguments to fine-tune this behavior:
t): show available functions
t): show unavailable functions
:search <string>: only show functions which have
<string>as a substring. This argument takes into account the previous two arguments.
For example, we can look for all available functions which might relate to
svd by doing the following:
CL-USER> (magicl:print-availability-report :search "svd" :show-unavailable nil) Fortran Function Lisp Function ------------------------------------------------------------------------ Library LIBBLAS: /usr/local/opt/lapack/lib/libblas.dylib Library LIBLAPACK: /usr/local/opt/lapack/lib/liblapack.dylib [x] CGESVD MAGICL.LAPACK-CFFI:%CGESVD [x] CGESVDX MAGICL.LAPACK-CFFI:%CGESVDX [x] CGGSVD3 MAGICL.LAPACK-CFFI:%CGGSVD3 [x] DBDSVDX MAGICL.LAPACK-CFFI:%DBDSVDX [x] DGESVD MAGICL.LAPACK-CFFI:%DGESVD [x] DGESVDX MAGICL.LAPACK-CFFI:%DGESVDX [x] DGGSVD3 MAGICL.LAPACK-CFFI:%DGGSVD3 [x] SBDSVDX MAGICL.LAPACK-CFFI:%SBDSVDX [x] SGESVD MAGICL.LAPACK-CFFI:%SGESVD [x] SGESVDX MAGICL.LAPACK-CFFI:%SGESVDX [x] SGGSVD3 MAGICL.LAPACK-CFFI:%SGGSVD3 [x] ZGESVD MAGICL.LAPACK-CFFI:%ZGESVD [x] ZGESVDX MAGICL.LAPACK-CFFI:%ZGESVDX [x] ZGGSVD3 MAGICL.LAPACK-CFFI:%ZGGSVD3
Generating BLAS and LAPACK Bindings
This library takes the approach of automatically generating the bindings to BLAS, LAPACK, and Expokit without relying on any special tools.
In order to generate the bindings, you will need to download the Fortran 90 source tarballs for BLAS/LAPACK and Expokit. Once downloaded, extract the tarballs into a directory and re-generate the bindings with the following commands:
(ql:quickload :magicl-gen) (in-package :magicl.generate-interface) (generate-blas-files #P"/path/to/lapack-3.7.1/") (generate-lapack-files* #P"/path/to/lapack-3.7.1/") (generate-expokit-files #P"/path/to/expokit/")
Currently this will write to the source distribution directory of
MAGICL, namely the files
History and Credits
MAGICL development started at Rigetti Computing by Robert Smith and Joe Lin in 2017.
CL-BLAPACK is a library developed by Ryan Rifkin and Evan Monroig. Rigetti Computing created a fork of this library and renamed it MAGICL, and made significant changes that departed from the original design, including:
- Fixing several bugs in the Fortran parsing to make it work with the latest reference BLAS and LAPACK, leading to significant refactoring.
- Adding support for matrix exponentiation with Expokit.
- Adding support for loading various BLAS and LAPACK implementations.
- Removing the use of the FNV library in favor of native Lisp arrays.
- Adding a high-level interface to various functions.
- Adding function availability reporting.
The most important common design decision between CL-BLAPACK and MAGICL is allowing direct access to the Fortran library functions by way of automatically generated Lisp bindings from the reference sources.