---
name: "cross"
section: "3clc"
platform: "linux"
package: "opencl-1.2-man-doc"
version: "1.0~svn33624-5.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/cross"
---

# cross(3clc)

Cross product.

## NAME

cross - Cross product.

##

**float4 cross(float4** *p0***, float4** *p1***);**

**float3 cross(float3** *p0***, float3** *p1***);**

**double4 cross(double4** *p0***, double4** *p1***);**

**double3 cross(double3** *p0***, double3** *p1***);**

###

| |
| --- |
| **half4** **cross** (**half4** *p0*, **half4** *p1*) // if half extension enabled |
| **half3** **cross** (**half3** *p0*, **half3** *p1*) // if half extension enabled |

## DESCRIPTION

Returns the cross product of *p0.xyz* and *p1.xyz*. The *w* component of the **float4** result (or **double** if the [**cl\_khr\_fp16**(3clc)](/cl_khr_fp16/3clc.md) extension is enabled) will be 0.0.

## NOTES

Built-in geometric functions operate component-wise. The description is per-component. **float***n* is **float**, **float2**, **float3**, or **float4** and **double***n* is **double**, **double2**, **double3**, or **double4**. The built-in geometric functions are implemented using the round to nearest even rounding mode.

The geometric functions can be implemented using contractions such as [**mad**(3clc)](/mad/3clc.md) or [**fma**(3clc)](/fma/3clc.md).

An application that wants to use **half** and **half***n* types will need to include the #pragma OPENCL EXTENSION [**cl\_khr\_fp16**(3clc)](/cl_khr_fp16/3clc.md) : enable directive.

## SPECIFICATION

**OpenCL Specification**\[1\]

## SEE ALSO

[**geometricFunctions**(3clc)](/geometricFunctions/3clc.md)

## AUTHORS

**The Khronos Group**

## COPYRIGHT

Copyright © 2007-2011 The Khronos Group Inc.\
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and/or associated documentation files (the "Materials"), to deal in the Materials without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Materials, and to permit persons to whom the Materials are furnished to do so, subject to the condition that this copyright notice and permission notice shall be included in all copies or substantial portions of the Materials.

## NOTES

- 1\.

  OpenCL Specification

  page 262, section 6.12.5 - Geometric Functions