---
title: vDSP_vmax
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.4+]
path: kernel/1579953-vdsp_vmax
---

# vDSP_vmax

Calculates the single-precision maximum of the corresponding values of two vectors using specified strides.

## Declaration

```occ
void vDSP_vmax(const float *__A, vDSP_Stride __IA, const float *__B, vDSP_Stride __IB, float *__C, vDSP_Stride __IC, vDSP_Length __N);
```

## Parameters

- `__A`: Single-precision real input vector.
- `__IA`: Stride for A.
- `__B`: Single-precision real input vector.
- `__IB`: Stride for B.
- `__C`: Single-precision real output vector.
- `__IC`: Stride for C.
- `__N`: The number of elements to process.

## Discussion

Discussion This function compares the first N elements of A with corresponding elements of B, leaving the greater (or equal) values as corresponding elements of C: for (n = 0; n < N; ++n)     C[n] = B[n] <= A[n] ? A[n] : B[n];