'\" t
.\"     Title: frexp
.\"    Author: The Khronos Group
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 01/14/2021
.\"    Manual: OpenCL Manual
.\"    Source: The Khronos Group
.\"  Language: English
.\"
.TH "FREXP" "3clc" "01/14/2021" "The Khronos Group" "OpenCL Manual"
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.SH "NAME"
frexp \- Extract mantissa and exponent\&.
.SH ""
.HP \w'floatn\ frexp('u
.BI "floatn frexp(floatn\ " "x" ", __global\ intn\ *" "exp" ");"
.HP \w'floatn\ frexp('u
.BI "floatn frexp(floatn\ " "x" ", __local\ intn\ *" "exp" ");"
.HP \w'floatn\ frexp('u
.BI "floatn frexp(floatn\ " "x" ", __private\ intn\ *" "exp" ");"
.HP \w'float\ frexp('u
.BI "float frexp(float\ " "x" ", __global\ int\ *" "exp" ");"
.HP \w'float\ frexp('u
.BI "float frexp(float\ " "x" ", __local\ int\ *" "exp" ");"
.HP \w'float\ frexp('u
.BI "float frexp(float\ " "x" ", __private\ int\ *" "exp" ");"
.HP \w'doublen\ frexp('u
.BI "doublen frexp(doublen\ " "x" ", __global\ intn\ *" "exp" ");"
.HP \w'doublen\ frexp('u
.BI "doublen frexp(doublen\ " "x" ", __local\ intn\ *" "exp" ");"
.HP \w'doublen\ frexp('u
.BI "doublen frexp(doublen\ " "x" ", __private\ intn\ *" "exp" ");"
.HP \w'double\ frexp('u
.BI "double frexp(double\ " "x" ", __global\ int\ *" "exp" ");"
.HP \w'double\ frexp('u
.BI "double frexp(double\ " "x" ", __local\ int\ *" "exp" ");"
.HP \w'double\ frexp('u
.BI "double frexp(double\ " "x" ", __private\ int\ *" "exp" ");"
.HP \w'halfn\ frexp('u
.BI "halfn frexp(halfn\ " "x" ", __global\ intn\ *" "exp" ");"
.HP \w'halfn\ frexp('u
.BI "halfn frexp(halfn\ " "x" ", __local\ intn\ *" "exp" ");"
.HP \w'halfn\ frexp('u
.BI "halfn frexp(halfn\ " "x" ", __private\ intn\ *" "exp" ");"
.HP \w'half\ frexp('u
.BI "half frexp(half\ " "x" ", __global\ int\ *" "exp" ");"
.HP \w'half\ frexp('u
.BI "half frexp(half\ " "x" ", __local\ int\ *" "exp" ");"
.HP \w'half\ frexp('u
.BI "half frexp(half\ " "x" ", __private\ int\ *" "exp" ");"
.SH "DESCRIPTION"
.PP
Extract mantissa and exponent from
\fIx\fR\&. For each component the mantissa returned is a float with magnitude in the interval [1/2, 1) or 0\&. Each component of
\fIx\fR
equals mantissa returned * 2exp\&.
.SH "NOTES"
.PP
The built\-in math functions are not affected by the prevailing rounding mode in the calling environment, and always return the same value as they would if called with the round to nearest even rounding mode\&.
.PP
An application that wants to use
\fBhalf\fR
and
\fBhalf\fR\fB\fIn\fR\fR
types will need to include the
#pragma OPENCL EXTENSION \fBcl_khr_fp16\fR(3clc) : enable
directive\&.
.SH "SPECIFICATION"
.PP
\m[blue]\fBOpenCL Specification\fR\m[]\&\s-2\u[1]\d\s+2
.SH "SEE ALSO"
.PP
\fBmathFunctions\fR(3clc)
.SH "AUTHORS"
.PP
\fBThe Khronos Group\fR
.SH "COPYRIGHT"
.br
Copyright \(co 2007-2011 The Khronos Group Inc.
.br
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.
.sp
.SH "NOTES"
.IP " 1." 4
OpenCL Specification
.RS 4
\%page 244, section 6.12.2 - Math Functions
.RE