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freebsd-dev/lib/msun/man/ilogb.3

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- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
2005-01-27 05:46:17 +00:00
.\" Copyright (c) 1985, 1991 Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" from: @(#)ieee.3 6.4 (Berkeley) 5/6/91
.\" $FreeBSD$
.\"
-mdoc sweep.
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.Dd November 6, 2005
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
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.Dt ILOGB 3
.Os
.Sh NAME
.Nm ilogb ,
.Nm ilogbf ,
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
.Nm ilogbl ,
.Nm logb ,
.Nm logbf
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
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.Nd extract exponent
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft int
.Fn ilogb "double x"
.Ft int
.Fn ilogbf "float x"
.Ft int
.Fn ilogbl "long double x"
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
.Ft double
.Fn logb "double x"
.Ft float
.Fn logbf "float x"
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
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.Sh DESCRIPTION
.Fn ilogb ,
.Fn ilogbf
and
.Fn ilogbl
return
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
.Fa x Ns 's exponent
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
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in integer format.
.Fn ilogb \*(Pm\*(If
returns
.Dv INT_MAX ,
.Fn ilogb \*(Pm\*(Na
returns
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
.Dv FP_ILOGBNAN ,
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
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and
.Fn ilogb 0
returns
.Dv FP_ILOGB0 .
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
.Pp
.Fn logb x
and
.Fn logbf x
return
.Fa x Ns 's exponent
in floating\-point format with the same precision as
.Fa x .
.Fn logb \*(Pm\*(If
returns +\*(If, and
.Fn logb 0
returns -\*(If with a division by zero exception.
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
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.Sh SEE ALSO
.Xr frexp 3 ,
.Xr ieee 3 ,
.Xr math 3 ,
.Xr scalbn 3
.Sh STANDARDS
The
.Fn ilogb ,
.Fn ilogbf ,
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
.Fn ilogbl ,
.Fn logb
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
2005-01-27 05:46:17 +00:00
and
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
.Fn logbf
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
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routines conform to
.St -isoC-99 .
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
.Fn logb
and
.Fn logbf
implement the logb function recommended by
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
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.St -ieee754 .
.Sh HISTORY
The
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
.Fn logb
function appeared in
.Bx 4.3 .
The
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
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.Fn ilogb
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
function appeared in
.Fx 1.1.5 .
The
- Move the functions presently described in in ieee(3) to their own manpages. They are not very related, so separating them makes it easier to add meaningful cross-references and extend some of the descriptions. - Move the part of math(3) that discusses IEEE 754 to the ieee(3) manpage.
2005-01-27 05:46:17 +00:00
.Fn ilogbf
and
The logb() functions are not just ieee754 "test" functions, but are standard in C99 and POSIX.1-2001+. They are also not deprecated, since apart from being standard they can handle special args slightly better than the ilogb() functions. Move their documentation to ilogb.3. Try to use consistent and improved wording for both sets of functions. All of ieee854, C99 and POSIX have better wording and more details for special args. Add history for the logb() functions and ilogbl(). Fix history for ilogb().
2005-11-06 12:18:27 +00:00
.Fn logbf
functions appeared in
.Fx 2.0 .
The
.Fn ilogbl
function appeared in
.Fx 5.4 .
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