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
page 256, section 6.12.3 - Integer Functions
The Khronos Group 02/03/2019 ABS, ABS_DIFF(3clc)