## table of contents

ABS, ABS_DIFF(3clc) | OpenCL Manual | ABS, ABS_DIFF(3clc) |

# NAME¶

abs,_abs_diff - Absolute value functions.

# ¶

**ugentype abs(gentype ***x***);**

**ugentype abs_diff(gentype ***x***,
gentype ***y***);**

# DESCRIPTION¶

**abs** returns |*x*|.

**abs_diff** returns |*x*-*y*| without modulo
overflow.

# NOTES¶

Built-in integer functions take scalar or vector arguments. The vector versions of the integer functions operate component-wise. The description is per component.

We use the generic type name **gentype** to indicate that the
function can take **char**, **char{2|3|4|8|16}**, **uchar**,
**uchar{2|3|4|8|16}**, **short**, **short{2|3|4|8|16}**,
**ushort**, **ushort{2|3|4|8|16}**, **int**,
**int{2|3|4|8|16}**, **uint**, **uint{2|3|4|8|16}**, **long**,
**long{2|3|4|8|16}**, **ulong**, or **ulong{2|3|4|8|16}** as the
type for the arguments. We use the generic type name **ugentype** to
refer to unsigned versions of **gentype**. For example, if **gentype**
is **char4**, **ugentype** is **uchar4**.

We also use the generic type name **sgentype** to indicate that
the function can take a scalar data type i.e. **char**, **uchar**,
**short**, **ushort**, **int**, **uint**, **long**, or
**ulong** as the type for the arguments. For built-in integer functions
that take **gentype** and **sgentype** arguments, the **gentype**
argument must be a vector or scalar version of the **sgentype** argument.
For example, if **sgentype** is **uchar**, **gentype** must be
**uchar** or **uchar{2|3|4|8|16}**. For vector versions,
**sgentype** is implicitly widened to **gentype** as described in
section 6.3.a of the OpenCL specification.

For any specific use of a function, the actual type has to be the same for all arguments and the return type unless otherwise specified.

# SPECIFICATION¶

**OpenCL Specification**[1]

# SEE ALSO¶

**integerFunctions**(3clc)

# 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

01/14/2021 | The Khronos Group |