<!--
{
  "availability" : [
    "iOS: -",
    "iPadOS: -",
    "macCatalyst: -",
    "macOS: 15.0.0 -",
    "tvOS: -",
    "visionOS: -",
    "watchOS: -"
  ],
  "documentType" : "symbol",
  "framework" : "Accelerate",
  "identifier" : "/documentation/Accelerate/BLAS",
  "metadataVersion" : "0.1.0",
  "role" : "Structure",
  "symbol" : {
    "kind" : "Structure",
    "modules" : [
      "Accelerate"
    ],
    "preciseIdentifier" : "s:10Accelerate4BLASV"
  },
  "title" : "BLAS"
}
-->

# BLAS

An enumeration that acts as a namespace for Swift overlays to BLAS.

```
struct BLAS
```

## Overview

The [`BLAS`](/documentation/Accelerate/BLAS) enumeration provides methods and structures that offer a Swift-friendly API for Basic Linear Algebra Subprograms (BLAS) and Linear Algebra PACKage (LAPACK) operations.

## Topics

### Setting the BLAS and LAPACK threading model

[`threadingModel`](/documentation/Accelerate/BLAS/threadingModel-swift.type.property)

The BLAS and LAPACK threading model.

[`ThreadingModel`](/documentation/Accelerate/BLAS/ThreadingModel-swift.struct)

Constants that describe the BLAS and LAPACK threading model.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)