Gonum BLAS

This repository is no longer maintained. Development has moved to https://github.com/gonum/gonum.

A collection of packages to provide BLAS functionality for the Go programming language

Installation

  go get github.com/gonum/blas

BLAS C-bindings

If you want to use OpenBLAS, install it in any directory:

  git clone https://github.com/xianyi/OpenBLAS
  cd OpenBLAS
  make

The blas/cgo package provides bindings to C-backed BLAS packages. blas/cgo needs the CGO_LDFLAGS environment variable to point to the blas installation. More information can be found in the cgo command documentation.

Then install the blas/cgo package:

  CGO_LDFLAGS="-L/path/to/OpenBLAS -lopenblas" go install github.com/gonum/blas/cgo

For Windows you can download binary packages for OpenBLAS at SourceForge.

If you want to use a different BLAS package such as the Intel MKL you can adjust the CGO_LDFLAGS variable:

  CGO_LDFLAGS="-lmkl_rt" go install github.com/gonum/blas/cgo

On OS X the easiest solution is to use the libraries provided by the system:

  CGO_LDFLAGS="-framework Accelerate" go install github.com/gonum/blas/cgo

Packages

blas

Defines BLAS API split in several interfaces.

blas/native

Go implementation of the BLAS API (incomplete, implements the float32 and float64 API)

blas/cgo

Binding to a C implementation of the cblas interface (e.g. ATLAS, OpenBLAS, Intel MKL)

The recommended (free) option for good performance on both Linux and Darwin is OpenBLAS.

blas/blas64 and blas/blas32

Wrappers for an implementation of the double (i.e., float64) and single (float32) precision real parts of the blas API

package main

import (
	"fmt"

	"github.com/gonum/blas/blas64"
)

func main() {
	v := blas64.Vector{Inc: 1, Data: []float64{1, 1, 1}}
	fmt.Println("v has length:", blas64.Nrm2(len(v.Data), v))
}

blas/cblas128 and blas/cblas64

Wrappers for an implementation of the double (i.e., complex128) and single (complex64) precision complex parts of the blas API

Currently blas/cblas64 and blas/cblas128 require blas/cgo.

Issues

If you find any bugs, feel free to file an issue on the github issue tracker for gonum/gonum or gonum/netlib for the CGO implementation if the bug exists in that reposity; no code changes will be made to this repository. Other discussions should be taken to the gonum-dev Google Group.

https://groups.google.com/forum/#!forum/gonum-dev

License

Please see github.com/gonum/license for general license information, contributors, authors, etc on the Gonum suite of packages.