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# MPSMatrixMultiplication

A matrix multiplication kernel.

```
class MPSMatrixMultiplication
```

## Overview

An [`MPSMatrixMultiplication`](/documentation/MetalPerformanceShaders/MPSMatrixMultiplication) object computes the following operation:

*C = alpha * op(A) * op(B) + beta * C*

Where *A*, *B*_,_ and *C* are matrices represented by [`MPSMatrix`](/documentation/MetalPerformanceShaders/MPSMatrix) objects, and *alpha* and *beta* are scalar values of the same data type as the values of *C*. *A* and *B* may each have an optional transposition operation applied.

Matrices *A*, *B*, and *C* are also referred to as the left input matrix, the right input matrix, and the result matrix respectively.

## Topics

### Methods

[`init(device:transposeLeft:transposeRight:resultRows:resultColumns:interiorColumns:alpha:beta:)`](/documentation/MetalPerformanceShaders/MPSMatrixMultiplication/init(device:transposeLeft:transposeRight:resultRows:resultColumns:interiorColumns:alpha:beta:))

Initializes a matrix multiplication kernel.

[`encode(commandBuffer:leftMatrix:rightMatrix:resultMatrix:)`](/documentation/MetalPerformanceShaders/MPSMatrixMultiplication/encode(commandBuffer:leftMatrix:rightMatrix:resultMatrix:))

Encodes a matrix multiplication kernel to a command buffer.

### Properties

[`leftMatrixOrigin`](/documentation/MetalPerformanceShaders/MPSMatrixMultiplication/leftMatrixOrigin)

The origin of the left input matrix.

[`rightMatrixOrigin`](/documentation/MetalPerformanceShaders/MPSMatrixMultiplication/rightMatrixOrigin)

The origin of the right input matrix.

[`resultMatrixOrigin`](/documentation/MetalPerformanceShaders/MPSMatrixMultiplication/resultMatrixOrigin)

The origin of the result matrix.

[`batchSize`](/documentation/MetalPerformanceShaders/MPSMatrixMultiplication/batchSize)

[`batchStart`](/documentation/MetalPerformanceShaders/MPSMatrixMultiplication/batchStart)


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