## table of contents

MUL24(3clc) | OpenCL Manual | MUL24(3clc) |

# NAME¶

mul24 - Fast integer function to multiply 24-bit integer values.

# ¶

**gentype mul24(gentype ***x***,
gentype ***y***);**

# DESCRIPTION¶

**mul24** multiplies two 24-bit integer values *x* and
*y*. *x* and *y* are 32-bit integers but only the low 24-bits
are used to perform the multiplication. **mul24** should only be used
when values in *x* and *y* are in the range [-223, 223-1] if
*x* and *y* are signed integers and in the range [0, 224-1] if
*x* and *y* are unsigned integers. If *x* and *y* are
not in this range, the multiplication result is implementation-defined.

# NOTES¶

Fast integer functions can be used for optimizing performance of
kernels. We use the generic type name **gentype** to indicate that the
function can take **int**, **int2**, **int3**, **int4**,
**int8**, **int16**, **uint**, **uint2**, **uint3**,
**uint4**, **uint8**, or **uint16** as the type for the
arguments.

# 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 |