BLAS bindings for Rust
Rust
Switch branches/tags
Nothing to show
Clone or download
mikkyang Merge pull request #18 from bluss/more-docs
Document matrix-vector operations
Latest commit bf6d331 Mar 6, 2016
Permalink
Failed to load latest commit information.
examples Update README example Sep 3, 2015
src Add description and equation for all matrix-vector operations Feb 28, 2016
.gitignore Initial commit Nov 7, 2014
Cargo.toml Version bump Dec 19, 2015
LICENSE Initial commit Nov 7, 2014
README.md Warn on sugar Jan 14, 2016
build.rs Simplify env vars Jun 10, 2015

README.md

RBLAS

MIT licensed crates.io

Rust bindings and wrappers for BLAS (Basic Linear Algebra Subprograms).

Overview

RBLAS wraps each external call in a trait with the same name (but capitalized). This trait contains a single static method, of the same name. These traits are generic over the four main types of numbers BLAS supports: f32, f64, Complex32, and Complex64.

For example the functions cblas_saxpy, cblas_daxpy, cblas_caxypy, and cblas_zaxpy are called with the function Axpy::axpy.

Additionally, RBLAS introduces a few traits to shorten calls to these BLAS functions: Vector for types that implement vector-like characteristics and Matrix for types that implement matrix-like characteristics. The Vector trait is already implemented by Vec and [] types.

Documentation

Installation

By default, the library links with blas dynamically. To link to an alternate implementation, like OpenBLAS, use the environment variable CARGO_BLAS. If you've already built the bindings, you may need to clean and build again.

export CARGO_BLAS=openblas

Example

extern crate rblas;

use rblas::Dot;

fn main() {
    let x = vec![1.0, -2.0, 3.0, 4.0];
    let y = [1.0, 1.0, 1.0, 1.0, 7.0];

    let d = Dot::dot(&x, &y[..x.len()]);
    assert_eq!(d, 6.0);
}

Sugared Example (Soon to be Deprecated)

#[macro_use]
extern crate rblas as blas;
use blas::math::Mat;
use blas::{Matrix, Vector};
use blas::math::Marker::T;

fn main() {
    let x = vec![1.0, 2.0];
    let xr = &x as &Vector<_>;
    let i = mat![1.0, 0.0; 0.0, 1.0];
    let ir = &i as &Matrix<_>;

    assert!(xr + &x == 2.0 * xr);
    assert!(ir * xr == x);

    let dot = (xr ^ T) * xr;
    assert!(dot == 5.0);
}