---
name: "reservedDataTypes"
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/reservedDataTypes"
---

# reservedDataTypes(3clc)

Built-in reserved Data Types.

## NAME

Reserved\_Data\_Types - Built-in reserved Data Types.

## DESCRIPTION

The data type names described in the table below are reserved and cannot be used by applications as user-defined type names. The vector data type names defined in [**vectorDataTypes**(3clc)](/vectorDataTypes/3clc.md), but where *n* is any value other than 2, 3, 4, 8 and 16, are also reserved.

| | |
| --- | --- |
| **Type** | **Description** |
| **bool***n* | A boolean vector. |
| **half***n* | A 16-bit float vector. |
| **quad**, **quad***n* | A 128-bit floating-point number and vectors. |
| **complex half**, **complex half***n*, **imaginary half**, **imaginary half***n* | Complex and imaginary 16-bit floating-point scalar and vector. |
| **complex float**, **complex float***n*, **imaginary float**, **imaginary float***n* | Complex and imaginary 32-bit floating-point scalar and vector. |
| **complex double**, **complex double***n*, **imaginary double**, **imaginary double***n* | Complex and imaginary 64-bit floating-point scalar and vector. |
| **complex quad**, **complex quad***n*, **imaginary quad**, **imaginary quad***n* | Complex and imaginary 128-bit floating-point scalar and vector. |
| **float***n*x*m* | An *n* x *m* matrix of single precision floating-point values stored in column-major order. |
| **double***n*x*m* | An *n* x *m* matrix of double precision floating-point values stored in column-major order. |
| **long double**, **long double***n* | A floating-point scalar and vector type with at long doublen least as much precision and range as a double and no more precision and range than a quad. |
| **long long**, **long long***n* | A 128-bit signed integer scalar and vector. |
| **unsigned long long**, **ulong long**, **ulong long***n* | A 128-bit unsigned integer scalar and vector. |

## SPECIFICATION

**OpenCL Specification**\[1\]

## SEE ALSO

[**macroLimits**(3clc)](/macroLimits/3clc.md), [**scalarDataTypes**(3clc)](/scalarDataTypes/3clc.md), [**vectorDataTypes**(3clc)](/vectorDataTypes/3clc.md), [**otherDataTypes**(3clc)](/otherDataTypes/3clc.md), [**abstractDataTypes**(3clc)](/abstractDataTypes/3clc.md), [**enums**(3clc)](/enums/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 200, section 6.1.4 - Reserved Data Types