# Single-precision floating-point matrices Perform operations on matrices that contain single-precision floating-point elements. ## Discussion A matrix is a 2D array of values arranged in rows and columns. The simd library provides support for matrices of up to four rows and four columns. It uses a column-major naming convention; for example, a [`simd_float4x2`](/documentation/simd/simd_float4x2) is a matrix that contains four columns and two rows. ## Topics ### Matrix structures [`simd_float2x2`](/documentation/simd/simd_float2x2) A matrix of two columns and two rows that contains single-precision values. [`simd_float2x3`](/documentation/simd/simd_float2x3) A matrix of two columns and three rows that contains single-precision values. [`simd_float2x4`](/documentation/simd/simd_float2x4) A matrix of two columns and four rows that contains single-precision values. [`simd_float3x2`](/documentation/simd/simd_float3x2) A matrix of three columns and two rows that contains single-precision values. [`simd_float3x3`](/documentation/simd/simd_float3x3) A matrix of three columns and three rows that contains single-precision values. [`simd_float3x4`](/documentation/simd/simd_float3x4) A matrix of three columns and four rows that contains single-precision values. [`simd_float4x2`](/documentation/simd/simd_float4x2) A matrix of four columns and two rows that contains single-precision values. [`simd_float4x3`](/documentation/simd/simd_float4x3) A matrix of four columns and three rows that contains single-precision values. [`simd_float4x4`](/documentation/simd/simd_float4x4) A matrix of four columns and four rows that contains single-precision values. --- Copyright © 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)