auto import from //depot/cupcake/@135843

46 files changed, 5387 insertions, 0 deletions

diff --git a/libm/man/acos.3 b/libm/man/acos.3
new file mode 100644
index 0000000..9f03d60
--- /dev/null
+++ b/libm/man/acos.3
@@ -0,0 +1,92 @@
+.\" Copyright (c) 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)acos.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/acos.3,v 1.13 2005/01/14 23:28:28 das Exp $
+.\"
+.Dd January 14, 2005
+.Dt ACOS 3
+.Os
+.Sh NAME
+.Nm acos ,
+.Nm acosf
+.Nd arc cosine functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn acos "double x"
+.Ft float
+.Fn acosf "float x"
+.Sh DESCRIPTION
+The
+.Fn acos
+and the
+.Fn acosf
+functions compute the principal value of the arc cosine of
+.Fa x .
+A domain error occurs for arguments not in the range
+.Bq -1 , +1 .
+For a discussion of error due to roundoff, see
+.Xr math 3 .
+.Sh RETURN VALUES
+The
+.Fn acos
+and the
+.Fn acosf
+functions return the arc cosine in the range
+.Bq 0 , \*(Pi
+radians.
+If:
+.Bd -unfilled -offset indent
+.Pf \&| Ns Ar x Ns \&| > 1 ,
+.Ed
+.Pp
+.Fn acos x
+raises an invalid exception and returns an \*(Na.
+.Sh SEE ALSO
+.Xr asin 3 ,
+.Xr atan 3 ,
+.Xr atan2 3 ,
+.Xr cos 3 ,
+.Xr cosh 3 ,
+.Xr fenv 3 ,
+.Xr math 3 ,
+.Xr sin 3 ,
+.Xr sinh 3 ,
+.Xr tan 3 ,
+.Xr tanh 3
+.Sh STANDARDS
+The
+.Fn acos
+function conforms to
+.St -isoC .
diff --git a/libm/man/acosh.3 b/libm/man/acosh.3
new file mode 100644
index 0000000..62534ab
--- /dev/null
+++ b/libm/man/acosh.3
@@ -0,0 +1,82 @@
+.\" Copyright (c) 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)acosh.3	5.2 (Berkeley) 5/6/91
+.\" $FreeBSD: src/lib/msun/man/acosh.3,v 1.11 2005/01/14 23:28:28 das Exp $
+.\"
+.Dd January 14, 2005
+.Dt ACOSH 3
+.Os
+.Sh NAME
+.Nm acosh ,
+.Nm acoshf
+.Nd inverse hyperbolic cosine functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn acosh "double x"
+.Ft float
+.Fn acoshf "float x"
+.Sh DESCRIPTION
+The
+.Fn acosh
+and the
+.Fn acoshf
+functions compute the inverse hyperbolic cosine
+of the real
+argument
+.Ar x .
+For a discussion of error due to roundoff, see
+.Xr math 3 .
+.Sh RETURN VALUES
+The
+.Fn acosh
+and the
+.Fn acoshf
+functions
+return the inverse hyperbolic cosine of
+.Ar x .
+If the argument is less than 1,
+.Fn acosh
+raises an invalid exception and returns an \*(Na.
+.Sh SEE ALSO
+.Xr asinh 3 ,
+.Xr atanh 3 ,
+.Xr exp 3 ,
+.Xr fenv 3 ,
+.Xr math 3
+.Sh HISTORY
+The
+.Fn acosh
+function appeared in
+.Bx 4.3 .
diff --git a/libm/man/asin.3 b/libm/man/asin.3
new file mode 100644
index 0000000..1018990
--- /dev/null
+++ b/libm/man/asin.3
@@ -0,0 +1,94 @@
+.\" Copyright (c) 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)asin.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/asin.3,v 1.15 2005/01/14 23:28:28 das Exp $
+.\"
+.Dd January 14, 2005
+.Dt ASIN 3
+.Os
+.Sh NAME
+.Nm asin ,
+.Nm asinf
+.Nd arc sine functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn asin "double x"
+.Ft float
+.Fn asinf "float x"
+.Sh DESCRIPTION
+The
+.Fn asin
+and the
+.Fn asinf
+functions compute the principal value of the arc sine of
+.Fa x .
+A domain error occurs for arguments not in the range
+.Bq -1 , +1 .
+For a discussion of error due to roundoff, see
+.Xr math 3 .
+.Sh RETURN VALUES
+The
+.Fn asin
+and the
+.Fn asinf
+functions return the arc sine in the range
+.Bk -words
+.Bq -\*(Pi/2 , +\*(Pi/2
+.Ek
+radians.
+If:
+.Bd -unfilled -offset indent
+.Pf \&| Ns Ar x Ns \&| > 1
+.Ed
+.Pp
+.Fn asin x
+raises an invalid exception and returns an \*(Na.
+.Sh SEE ALSO
+.Xr acos 3 ,
+.Xr atan 3 ,
+.Xr atan2 3 ,
+.Xr cos 3 ,
+.Xr cosh 3 ,
+.Xr fenv 3 ,
+.Xr math 3 ,
+.Xr sin 3 ,
+.Xr sinh 3 ,
+.Xr tan 3 ,
+.Xr tanh 3
+.Sh STANDARDS
+The
+.Fn asin
+function conforms to
+.St -isoC .
diff --git a/libm/man/asinh.3 b/libm/man/asinh.3
new file mode 100644
index 0000000..6a0d9a0
--- /dev/null
+++ b/libm/man/asinh.3
@@ -0,0 +1,78 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)asinh.3	6.4 (Berkeley) 5/6/91
+.\" $FreeBSD: src/lib/msun/man/asinh.3,v 1.10 2001/10/13 12:23:22 bde Exp $
+.\"
+.Dd May 6, 1991
+.Dt ASINH 3
+.Os
+.Sh NAME
+.Nm asinh ,
+.Nm asinhf
+.Nd inverse hyperbolic sine functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn asinh "double x"
+.Ft float
+.Fn asinhf "float x"
+.Sh DESCRIPTION
+The
+.Fn asinh
+and the
+.Fn asinhf
+functions compute the inverse hyperbolic sine
+of the real
+argument
+.Ar x .
+For a discussion of error due to roundoff, see
+.Xr math 3 .
+.Sh RETURN VALUES
+The
+.Fn asinh
+and the
+.Fn asinhf
+functions
+return the inverse hyperbolic sine of
+.Ar x .
+.Sh SEE ALSO
+.Xr acosh 3 ,
+.Xr atanh 3 ,
+.Xr exp 3 ,
+.Xr math 3
+.Sh HISTORY
+The
+.Fn asinh
+function appeared in
+.Bx 4.3 .
diff --git a/libm/man/atan.3 b/libm/man/atan.3
new file mode 100644
index 0000000..c4cefed
--- /dev/null
+++ b/libm/man/atan.3
@@ -0,0 +1,84 @@
+.\" Copyright (c) 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)atan.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/atan.3,v 1.10 2001/10/13 12:23:22 bde Exp $
+.\"
+.Dd May 2, 1991
+.Dt ATAN 3
+.Os
+.Sh NAME
+.Nm atan ,
+.Nm atanf
+.Nd arc tangent functions of one variable
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn atan "double x"
+.Ft float
+.Fn atanf "float x"
+.Sh DESCRIPTION
+The
+.Fn atan
+and the
+.Fn atanf
+functions compute the principal value of the arc tangent of
+.Fa x .
+For a discussion of error due to roundoff, see
+.Xr math 3 .
+.Sh RETURN VALUES
+The
+.Fn atan
+and the
+.Fn atanf
+function returns the arc tangent in the range
+.Bk -words
+.Bq -\*(Pi/2 , +\*(Pi/2
+.Ek
+radians.
+.Sh SEE ALSO
+.Xr acos 3 ,
+.Xr asin 3 ,
+.Xr atan2 3 ,
+.Xr cos 3 ,
+.Xr cosh 3 ,
+.Xr math 3 ,
+.Xr sin 3 ,
+.Xr sinh 3 ,
+.Xr tan 3 ,
+.Xr tanh 3
+.Sh STANDARDS
+The
+.Fn atan
+function conforms to
+.St -isoC .
diff --git a/libm/man/atan2.3 b/libm/man/atan2.3
new file mode 100644
index 0000000..421e17d
--- /dev/null
+++ b/libm/man/atan2.3
@@ -0,0 +1,187 @@
+.\" Copyright (c) 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)atan2.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/atan2.3,v 1.14 2005/01/28 21:13:34 ru Exp $
+.\"
+.Dd January 14, 2005
+.Dt ATAN2 3
+.Os
+.Sh NAME
+.Nm atan2 ,
+.Nm atan2f
+.Nd arc tangent functions of two variables
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn atan2 "double y" "double x"
+.Ft float
+.Fn atan2f "float y" "float x"
+.Sh DESCRIPTION
+The
+.Fn atan2
+and the
+.Fn atan2f
+functions compute the principal value of the arc tangent of
+.Fa y/ Ns Ar x ,
+using the signs of both arguments to determine the quadrant of
+the return value.
+.Sh RETURN VALUES
+The
+.Fn atan2
+and the
+.Fn atan2f
+functions, if successful,
+return the arc tangent of
+.Fa y/ Ns Ar x
+in the range
+.Bk -words
+.Bq \&- Ns \*(Pi , \&+ Ns \*(Pi
+.Ek
+radians.
+Here are some of the special cases:
+.Bl -column atan_(y,x)_:=____  sign(y)_(Pi_atan2(Xy_xX))___
+.It Fn atan2 y x No := Ta
+.Fn atan y/x Ta
+if
+.Ar x
+> 0,
+.It Ta sign( Ns Ar y Ns )*(\*(Pi -
+.Fn atan "\\*(Bay/x\\*(Ba" ) Ta
+if
+.Ar x
+< 0,
+.It Ta
+.No 0 Ta
+if x = y = 0, or
+.It Ta
+.Pf sign( Ar y Ns )*\\*(Pi/2 Ta
+if
+.Ar x
+= 0 \(!=
+.Ar y .
+.El
+.Sh NOTES
+The function
+.Fn atan2
+defines "if x > 0,"
+.Fn atan2 0 0
+= 0 despite that previously
+.Fn atan2 0 0
+may have generated an error message.
+The reasons for assigning a value to
+.Fn atan2 0 0
+are these:
+.Bl -enum -offset indent
+.It
+Programs that test arguments to avoid computing
+.Fn atan2 0 0
+must be indifferent to its value.
+Programs that require it to be invalid are vulnerable
+to diverse reactions to that invalidity on diverse computer systems.
+.It
+The
+.Fn atan2
+function is used mostly to convert from rectangular (x,y)
+to polar
+.if n\
+(r,theta)
+.if t\
+(r,\(*h)
+coordinates that must satisfy x =
+.if n\
+r\(**cos theta
+.if t\
+r\(**cos\(*h
+and y =
+.if n\
+r\(**sin theta.
+.if t\
+r\(**sin\(*h.
+These equations are satisfied when (x=0,y=0)
+is mapped to
+.if n \
+(r=0,theta=0).
+.if t \
+(r=0,\(*h=0).
+In general, conversions to polar coordinates
+should be computed thus:
+.Bd -unfilled -offset indent
+.if n \{\
+r	:= hypot(x,y);  ... := sqrt(x\(**x+y\(**y)
+theta	:= atan2(y,x).
+.\}
+.if t \{\
+r	:= hypot(x,y);  ... := \(sr(x\u\s82\s10\d+y\u\s82\s10\d)
+\(*h	:= atan2(y,x).
+.\}
+.Ed
+.It
+The foregoing formulas need not be altered to cope in a
+reasonable way with signed zeros and infinities
+on a machine that conforms to
+.Tn IEEE 754 ;
+the versions of
+.Xr hypot 3
+and
+.Fn atan2
+provided for
+such a machine are designed to handle all cases.
+That is why
+.Fn atan2 \(+-0 \-0
+= \(+-\*(Pi
+for instance.
+In general the formulas above are equivalent to these:
+.Bd -unfilled -offset indent
+.if n \
+r := sqrt(x\(**x+y\(**y); if r = 0 then x := copysign(1,x);
+.if t \
+r := \(sr(x\(**x+y\(**y);\0\0if r = 0 then x := copysign(1,x);
+.Ed
+.El
+.Sh SEE ALSO
+.Xr acos 3 ,
+.Xr asin 3 ,
+.Xr atan 3 ,
+.Xr cos 3 ,
+.Xr cosh 3 ,
+.Xr math 3 ,
+.Xr sin 3 ,
+.Xr sinh 3 ,
+.Xr tan 3 ,
+.Xr tanh 3
+.Sh STANDARDS
+The
+.Fn atan2
+function conforms to
+.St -isoC .
diff --git a/libm/man/atanh.3 b/libm/man/atanh.3
new file mode 100644
index 0000000..3dcc01a
--- /dev/null
+++ b/libm/man/atanh.3
@@ -0,0 +1,85 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)atanh.3	5.2 (Berkeley) 5/6/91
+.\" $FreeBSD: src/lib/msun/man/atanh.3,v 1.13 2005/01/28 21:14:16 ru Exp $
+.\"
+.Dd January 14, 2005
+.Dt ATANH 3
+.Os
+.Sh NAME
+.Nm atanh ,
+.Nm atanhf
+.Nd inverse hyperbolic tangent functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn atanh "double x"
+.Ft float
+.Fn atanhf "float x"
+.Sh DESCRIPTION
+The
+.Fn atanh
+and the
+.Fn atanhf
+functions compute the inverse hyperbolic tangent
+of the real
+argument
+.Ar x .
+For a discussion of error due to roundoff, see
+.Xr math 3 .
+.Sh RETURN VALUES
+The
+.Fn atanh
+and the
+.Fn atanhf
+functions
+return the inverse hyperbolic tangent of
+.Ar x
+if successful.
+If the argument has absolute value 1, a divide-by-zero exception
+is raised and an infinity is returned.
+If
+.Ar |x|
+> 1, an invalid exception is raised and an \*(Na is returned.
+.Sh SEE ALSO
+.Xr acosh 3 ,
+.Xr asinh 3 ,
+.Xr exp 3 ,
+.Xr fenv 3 ,
+.Xr math 3
+.Sh HISTORY
+The
+.Fn atanh
+function appeared in
+.Bx 4.3 .
diff --git a/libm/man/ceil.3 b/libm/man/ceil.3
new file mode 100644
index 0000000..557903e
--- /dev/null
+++ b/libm/man/ceil.3
@@ -0,0 +1,82 @@
+.\" Copyright (c) 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)ceil.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/ceil.3,v 1.15 2005/01/13 20:33:42 stefanf Exp $
+.\"
+.Dd January 13, 2005
+.Dt CEIL 3
+.Os
+.Sh NAME
+.Nm ceil ,
+.Nm ceilf ,
+.Nm ceill
+.Nd smallest integral value greater than or equal to x
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn ceil "double x"
+.Ft float
+.Fn ceilf "float x"
+.Ft "long double"
+.Fn ceill "long double x"
+.Sh DESCRIPTION
+The
+.Fn ceil ,
+.Fn ceilf
+and
+.Fn ceill
+functions return the smallest integral value
+greater than or equal to
+.Fa x ,
+expressed as a floating-point number.
+.Sh SEE ALSO
+.Xr abs 3 ,
+.Xr fabs 3 ,
+.Xr floor 3 ,
+.Xr ieee 3 ,
+.Xr math 3 ,
+.Xr rint 3 ,
+.Xr round 3 ,
+.Xr trunc 3
+.Sh STANDARDS
+The
+.Fn ceil
+function conforms to
+.St -isoC .
+The
+.Fn ceilf
+and
+.Fn ceill
+functions conform to
+.St -isoC-99 .
diff --git a/libm/man/cimag.3 b/libm/man/cimag.3
new file mode 100644
index 0000000..069e848
--- /dev/null
+++ b/libm/man/cimag.3
@@ -0,0 +1,96 @@
+.\" Copyright (c) 2004 Stefan Farfeleder
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/cimag.3,v 1.2 2005/01/13 10:43:01 ru Exp $
+.\"
+.Dd August 7, 2004
+.Dt CIMAG 3
+.Os
+.Sh NAME
+.Nm cimag , cimagf , cimagl ,
+.Nm conj , conjf , conjl ,
+.Nm creal , crealf , creall
+.Nd "functions to manipulate complex numbers"
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In complex.h
+.Ft double
+.Fn cimag "double complex z"
+.Ft float
+.Fn cimagf "float complex z"
+.Ft "long double"
+.Fn cimagl "long double complex z"
+.Ft "double complex"
+.Fn conj "double complex z"
+.Ft "float complex"
+.Fn conjf "float complex z"
+.Ft "long double complex"
+.Fn conjl "long double complex z"
+.Ft double
+.Fn creal "double complex z"
+.Ft float
+.Fn crealf "float complex z"
+.Ft "long double"
+.Fn creall "long double complex z"
+.Sh DESCRIPTION
+Let
+.Sm off
+.Fa a + b * Em i
+.Sm on
+denote the complex number
+.Fa z .
+.Pp
+The
+.Fn cimag
+functions return the imaginary part
+.Fa b .
+.Pp
+The
+.Fn conj
+functions return the complex conjugate
+.Sm off
+.Fa a - b * Em i .
+.Sm on
+.Pp
+The
+.Fn creal
+functions return the real part
+.Fa a .
+.Sh STANDARDS
+The
+.Fn cimag ,
+.Fn conj
+and
+.Fn creal
+functions conform to
+.St -isoC-99 .
+.Sh HISTORY
+The
+.Fn cimag ,
+.Fn conj
+and
+.Fn creal
+functions first appeared in
+.Fx 5.3 .
diff --git a/libm/man/copysign.3 b/libm/man/copysign.3
new file mode 100644
index 0000000..c3ce3dc
--- /dev/null
+++ b/libm/man/copysign.3
@@ -0,0 +1,90 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: src/lib/msun/man/copysign.3,v 1.1 2005/01/27 05:46:16 das Exp $
+.\"
+.Dd January 26, 2005
+.Dt COPYSIGN 3
+.Os
+.Sh NAME
+.Nm copysign ,
+.Nm copysignf ,
+.Nm copysignl
+.Nd copy sign
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn copysign "double x" "double y"
+.Ft float
+.Fn copysignf "float x" "float y"
+.Ft long double
+.Fn copysignl "long double x" "long double y"
+.Sh DESCRIPTION
+The
+.Fn copysign ,
+.Fn copysignf
+and
+.Fn copysignl
+functions
+return
+.Fa x
+with its sign changed to
+.Fa y Ns 's .
+.Sh SEE ALSO
+.Xr fabs 3 ,
+.Xr fdim 3 ,
+.Xr ieee 3 ,
+.Xr math 3
+.Sh STANDARDS
+The
+.Fn copysign ,
+.Fn copysignf ,
+and
+.Fn copysignl
+routines conform to
+.St -isoC-99 .
+They implement the Copysign function recommended by
+.St -ieee754 .
+.Sh HISTORY
+The
+.Fn copysign ,
+.Fn copysignf ,
+and
+.Fn copysignl
+functions appeared in
+.Bx 4.3 ,
+.Fx 2.0 ,
+and
+.Fx 5.3 ,
+respectively.
diff --git a/libm/man/cos.3 b/libm/man/cos.3
new file mode 100644
index 0000000..8e0bd91
--- /dev/null
+++ b/libm/man/cos.3
@@ -0,0 +1,83 @@
+.\" Copyright (c) 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)cos.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/cos.3,v 1.11 2001/10/13 12:23:23 bde Exp $
+.\"
+.Dd May 2, 1991
+.Dt COS 3
+.Os
+.Sh NAME
+.Nm cos ,
+.Nm cosf
+.Nd cosine functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn cos "double x"
+.Ft float
+.Fn cosf "float x"
+.Sh DESCRIPTION
+The
+.Fn cos
+and the
+.Fn cosf
+functions compute the cosine of
+.Fa x
+(measured in radians).
+A large magnitude argument may yield a result with little or no
+significance.
+For a discussion of error due to roundoff, see
+.Xr math 3 .
+.Sh RETURN VALUES
+The
+.Fn cos
+and the
+.Fn cosf
+functions return the cosine value.
+.Sh SEE ALSO
+.Xr acos 3 ,
+.Xr asin 3 ,
+.Xr atan 3 ,
+.Xr atan2 3 ,
+.Xr cosh 3 ,
+.Xr math 3 ,
+.Xr sin 3 ,
+.Xr sinh 3 ,
+.Xr tan 3 ,
+.Xr tanh 3
+.Sh STANDARDS
+The
+.Fn cos
+function conforms to
+.St -isoC .
diff --git a/libm/man/cosh.3 b/libm/man/cosh.3
new file mode 100644
index 0000000..947c33e
--- /dev/null
+++ b/libm/man/cosh.3
@@ -0,0 +1,72 @@
+.\" Copyright (c) 1989, 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)cosh.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/cosh.3,v 1.12 2005/01/14 23:28:28 das Exp $
+.\"
+.Dd January 14, 2005
+.Dt COSH 3
+.Os
+.Sh NAME
+.Nm cosh ,
+.Nm coshf
+.Nd hyperbolic cosine functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn cosh "double x"
+.Ft float
+.Fn coshf "float x"
+.Sh DESCRIPTION
+The
+.Fn cosh
+and the
+.Fn coshf
+functions compute the hyperbolic cosine of
+.Fa x .
+.Sh SEE ALSO
+.Xr acos 3 ,
+.Xr asin 3 ,
+.Xr atan 3 ,
+.Xr atan2 3 ,
+.Xr cos 3 ,
+.Xr math 3 ,
+.Xr sin 3 ,
+.Xr sinh 3 ,
+.Xr tan 3 ,
+.Xr tanh 3
+.Sh STANDARDS
+The
+.Fn cosh
+function conforms to
+.St -isoC .
diff --git a/libm/man/erf.3 b/libm/man/erf.3
new file mode 100644
index 0000000..824787f
--- /dev/null
+++ b/libm/man/erf.3
@@ -0,0 +1,97 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)erf.3	6.4 (Berkeley) 4/20/91
+.\" $FreeBSD: src/lib/msun/man/erf.3,v 1.11 2004/07/02 23:52:20 ru Exp $
+.\"
+.Dd April 20, 1991
+.Dt ERF 3
+.Os
+.Sh NAME
+.Nm erf ,
+.Nm erff ,
+.Nm erfc ,
+.Nm erfcf
+.Nd error function operators
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn erf "double x"
+.Ft float
+.Fn erff "float x"
+.Ft double
+.Fn erfc "double x"
+.Ft float
+.Fn erfcf "float x"
+.Sh DESCRIPTION
+These functions calculate the error function of
+.Fa x .
+.Pp
+The
+.Fn erf
+and the
+.Fn erff
+functions calculate the error function of x; where
+.Bd -ragged -offset indent
+.if n \{\
+erf(x) = 2/sqrt(pi)\(**\|integral from 0 to x of exp(\-t\(**t) dt.
+\}
+.if t \{\
+erf\|(x) :=
+(2/\(sr\(*p)\|\(is\d\s8\z0\s10\u\u\s8x\s10\d\|exp(\-t\u\s82\s10\d)\|dt.
+\}
+.Ed
+.Pp
+The
+.Fn erfc
+and the
+.Fn erfcf
+functions calculate the complementary error function of
+.Fa x ;
+that is
+.Fn erfc
+subtracts the result of the error function
+.Fn erf x
+from 1.0.
+This is useful, since for large
+.Fa x
+places disappear.
+.Sh SEE ALSO
+.Xr math 3
+.Sh HISTORY
+The
+.Fn erf
+and
+.Fn erfc
+functions appeared in
+.Bx 4.3 .
diff --git a/libm/man/exp.3 b/libm/man/exp.3
new file mode 100644
index 0000000..f6aed8f
--- /dev/null
+++ b/libm/man/exp.3
@@ -0,0 +1,236 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)exp.3	6.12 (Berkeley) 7/31/91
+.\" $FreeBSD: src/lib/msun/man/exp.3,v 1.22 2005/04/05 02:57:28 das Exp $
+.\"
+.Dd April 5, 2005
+.Dt EXP 3
+.Os
+.Sh NAME
+.Nm exp ,
+.Nm expf ,
+.\" The sorting error is intentional.  exp and expf should be adjacent.
+.Nm exp2 ,
+.Nm exp2f ,
+.Nm expm1 ,
+.Nm expm1f ,
+.Nm log ,
+.Nm logf ,
+.Nm log10 ,
+.Nm log10f ,
+.Nm log1p ,
+.Nm log1pf ,
+.Nm pow ,
+.Nm powf
+.Nd exponential, logarithm, power functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn exp "double x"
+.Ft float
+.Fn expf "float x"
+.Ft double
+.Fn exp2 "double x"
+.Ft float
+.Fn exp2f "float x"
+.Ft double
+.Fn expm1 "double x"
+.Ft float
+.Fn expm1f "float x"
+.Ft double
+.Fn log "double x"
+.Ft float
+.Fn logf "float x"
+.Ft double
+.Fn log10 "double x"
+.Ft float
+.Fn log10f "float x"
+.Ft double
+.Fn log1p "double x"
+.Ft float
+.Fn log1pf "float x"
+.Ft double
+.Fn pow "double x" "double y"
+.Ft float
+.Fn powf "float x" "float y"
+.Sh DESCRIPTION
+The
+.Fn exp
+and the
+.Fn expf
+functions compute the base
+.Ms e
+exponential value of the given argument
+.Fa x .
+.Pp
+The
+.Fn exp2
+and the
+.Fn exp2f
+functions compute the base 2 exponential of the given argument
+.Fa x .
+.Pp
+The
+.Fn expm1
+and the
+.Fn expm1f
+functions compute the value exp(x)\-1 accurately even for tiny argument
+.Fa x .
+.Pp
+The
+.Fn log
+and the
+.Fn logf
+functions compute the value of the natural logarithm of argument
+.Fa x .
+.Pp
+The
+.Fn log10
+and the
+.Fn log10f
+functions compute the value of the logarithm of argument
+.Fa x
+to base 10.
+.Pp
+The
+.Fn log1p
+and the
+.Fn log1pf
+functions compute
+the value of log(1+x) accurately even for tiny argument
+.Fa x .
+.Pp
+The
+.Fn pow
+and the
+.Fn powf
+functions compute the value
+of
+.Ar x
+to the exponent
+.Ar y .
+.Sh ERROR (due to Roundoff etc.)
+The values of
+.Fn exp 0 ,
+.Fn expm1 0 ,
+.Fn exp2 integer ,
+and
+.Fn pow integer integer
+are exact provided that they are representable.
+.\" XXX Is this really true for pow()?
+Otherwise the error in these functions is generally below one
+.Em ulp .
+.Sh RETURN VALUES
+These functions will return the appropriate computation unless an error
+occurs or an argument is out of range.
+The functions
+.Fn pow x y
+and
+.Fn powf x y
+raise an invalid exception and return an \*(Na if
+.Fa x
+< 0 and
+.Fa y
+is not an integer.
+An attempt to take the logarithm of \*(Pm0 will result in
+a divide-by-zero exception, and an infinity will be returned.
+An attempt to take the logarithm of a negative number will
+result in an invalid exception, and an \*(Na will be generated.
+.Sh NOTES
+The functions exp(x)\-1 and log(1+x) are called
+expm1 and logp1 in
+.Tn BASIC
+on the Hewlett\-Packard
+.Tn HP Ns \-71B
+and
+.Tn APPLE
+Macintosh,
+.Tn EXP1
+and
+.Tn LN1
+in Pascal, exp1 and log1 in C
+on
+.Tn APPLE
+Macintoshes, where they have been provided to make
+sure financial calculations of ((1+x)**n\-1)/x, namely
+expm1(n\(**log1p(x))/x, will be accurate when x is tiny.
+They also provide accurate inverse hyperbolic functions.
+.Pp
+The function
+.Fn pow x 0
+returns x**0 = 1 for all x including x = 0, \*(If, and \*(Na .
+Previous implementations of pow may
+have defined x**0 to be undefined in some or all of these
+cases.
+Here are reasons for returning x**0 = 1 always:
+.Bl -enum -width indent
+.It
+Any program that already tests whether x is zero (or
+infinite or \*(Na) before computing x**0 cannot care
+whether 0**0 = 1 or not.
+Any program that depends
+upon 0**0 to be invalid is dubious anyway since that
+expression's meaning and, if invalid, its consequences
+vary from one computer system to another.
+.It
+Some Algebra texts (e.g.\& Sigler's) define x**0 = 1 for
+all x, including x = 0.
+This is compatible with the convention that accepts a[0]
+as the value of polynomial
+.Bd -literal -offset indent
+p(x) = a[0]\(**x**0 + a[1]\(**x**1 + a[2]\(**x**2 +...+ a[n]\(**x**n
+.Ed
+.Pp
+at x = 0 rather than reject a[0]\(**0**0 as invalid.
+.It
+Analysts will accept 0**0 = 1 despite that x**y can
+approach anything or nothing as x and y approach 0
+independently.
+The reason for setting 0**0 = 1 anyway is this:
+.Bd -ragged -offset indent
+If x(z) and y(z) are
+.Em any
+functions analytic (expandable
+in power series) in z around z = 0, and if there
+x(0) = y(0) = 0, then x(z)**y(z) \(-> 1 as z \(-> 0.
+.Ed
+.It
+If 0**0 = 1, then
+\*(If**0 = 1/0**0 = 1 too; and
+then \*(Na**0 = 1 too because x**0 = 1 for all finite
+and infinite x, i.e., independently of x.
+.El
+.Sh SEE ALSO
+.Xr fenv 3 ,
+.Xr math 3
diff --git a/libm/man/fabs.3 b/libm/man/fabs.3
new file mode 100644
index 0000000..56b3a23
--- /dev/null
+++ b/libm/man/fabs.3
@@ -0,0 +1,87 @@
+.\" Copyright (c) 1991 The Regents of the University of California.
+.\" All rights reserved.
+.\"
+.\"	@(#)fabs.3	5.1 (Berkeley) 5/2/91
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)fabs.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/fabs.3,v 1.11 2004/07/01 18:20:57 ru Exp $
+.\"
+.Dd October 25, 2003
+.Dt FABS 3
+.Os
+.Sh NAME
+.Nm fabs ,
+.Nm fabsf ,
+.Nm fabsl
+.Nd floating-point absolute value functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn fabs "double x"
+.Ft float
+.Fn fabsf "float x"
+.Ft long double
+.Fn fabsl "long double x"
+.Sh DESCRIPTION
+The
+.Fn fabs ,
+.Fn fabsf
+and
+.Fn fabsl
+functions compute the absolute value of a floating-point number
+.Fa x .
+.Sh RETURN VALUES
+The
+.Fn fabs ,
+.Fn fabsf
+and
+.Fn fabsl
+functions return the absolute value of
+.Fa x .
+.Sh SEE ALSO
+.Xr abs 3 ,
+.Xr ceil 3 ,
+.Xr floor 3 ,
+.Xr ieee 3 ,
+.Xr math 3 ,
+.Xr rint 3
+.Sh STANDARDS
+The
+.Fn fabs
+function conforms to
+.St -isoC .
+The
+.Fn fabsf
+and
+.Fn fabsl
+functions conform to
+.St -isoC-99 .
diff --git a/libm/man/fdim.3 b/libm/man/fdim.3
new file mode 100644
index 0000000..ca4e5ec
--- /dev/null
+++ b/libm/man/fdim.3
@@ -0,0 +1,86 @@
+.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/fdim.3,v 1.1 2004/06/30 07:04:01 das Exp $
+.\"
+.Dd June 29, 2004
+.Dt FDIM 3
+.Os
+.Sh NAME
+.Nm fdim ,
+.Nm fdimf ,
+.Nm fdiml
+.Nd positive difference functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn fdim "double x" "double y"
+.Ft float
+.Fn fdimf "float x" "float y"
+.Ft long double
+.Fn fdiml "long double x" "long double y"
+.Sh DESCRIPTION
+The
+.Fn fdim ,
+.Fn fdimf ,
+and
+.Fn fdiml
+functions return the positive difference between
+.Fa x
+and
+.Fa y .
+That is, if
+.Fa x\- Ns Fa y
+is positive, then
+.Fa x\- Ns Fa y
+is returned.
+If either
+.Fa x
+or
+.Fa y
+is an \*(Na, then an \*(Na is returned.
+Otherwise, the result is
+.Li +0.0 .
+.Pp
+Overflow or underflow may occur iff the exact result is not
+representable in the return type.
+No other exceptions are raised.
+.Sh SEE ALSO
+.Xr fabs 3 ,
+.Xr fmax 3 ,
+.Xr fmin 3 ,
+.Xr math 3
+.Sh STANDARDS
+The
+.Fn fdim ,
+.Fn fdimf ,
+and
+.Fn fdiml
+functions conform to
+.St -isoC-99 .
+.Sh HISTORY
+These routines first appeared in
+.Fx 5.3 .
diff --git a/libm/man/feclearexcept.3 b/libm/man/feclearexcept.3
new file mode 100644
index 0000000..073de67
--- /dev/null
+++ b/libm/man/feclearexcept.3
@@ -0,0 +1,139 @@
+.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/feclearexcept.3,v 1.3 2005/01/14 09:12:05 ru Exp $
+.\"
+.Dd May 8, 2004
+.Dt FECLEAREXCEPT 3
+.Os
+.Sh NAME
+.Nm feclearexcept ,
+.Nm fegetexceptflag ,
+.Nm feraiseexcept ,
+.Nm fesetexceptflag ,
+.Nm fetestexcept
+.Nd floating-point exception flag manipulation
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In fenv.h
+.Fd "#pragma STDC FENV_ACCESS ON"
+.Ft int
+.Fn feclearexcept "int excepts"
+.Ft int
+.Fn fegetexceptflag "fexcept_t *flagp" "int excepts"
+.Ft int
+.Fn feraiseexcept "int excepts"
+.Ft int
+.Fn fesetexceptflag "const fexcept_t *flagp" "int excepts"
+.Ft int
+.Fn fetestexcept "int excepts"
+.Sh DESCRIPTION
+The
+.Fn feclearexcept
+routine clears the floating-point exception flags specified by
+.Fa excepts ,
+whereas
+.Fn feraiseexcept
+raises the specified exceptions.
+Raising an exception causes the corresponding flag to be set,
+and a
+.Dv SIGFPE
+is delivered to the process if the exception is unmasked.
+.Pp
+The
+.Fn fetestexcept
+function determines which flags are currently set, of those specified by
+.Fa excepts .
+.Pp
+The
+.Fn fegetexceptflag
+function stores the state of the exception flags specified in
+.Fa excepts
+in the opaque object pointed to by
+.Fa flagp .
+Similarly,
+.Fn fesetexceptflag
+changes the specified exception flags to reflect the state stored in
+the object pointed to by
+.Fa flagp .
+Note that the flags restored with
+.Fn fesetexceptflag
+must be a (not necessarily proper) subset of the flags recorded by
+a prior call to
+.Fn fegetexceptflag .
+.Pp
+For all of these functions, the possible types of exceptions
+include those described in
+.Xr fenv 3 .
+Some architectures may define other types of floating-point exceptions.
+.Sh IMPLEMENTATION NOTES
+On some architectures, raising an overflow or underflow exception
+also causes an inexact exception to be raised.
+In these cases, the overflow or underflow will be raised first.
+.Pp
+The
+.Fn fegetexceptflag
+and
+.Fn fesetexceptflag
+routines are preferred to
+.Fn fetestexcept
+and
+.Fn feraiseexcept ,
+respectively, for saving and restoring exception flags.
+The latter do not re-raise exceptions and may preserve
+architecture-specific information such as addresses where
+exceptions occurred.
+.Sh RETURN VALUES
+The
+.Fn feclearexcept ,
+.Fn fegetexceptflag ,
+.Fn feraiseexcept ,
+and
+.Fn fesetexceptflag
+functions return 0 upon success, and non-zero otherwise.
+The
+.Fn fetestexcept
+function returns the bitwise OR of the values of the current exception
+flags that were requested.
+.Sh SEE ALSO
+.Xr sigaction 2 ,
+.Xr feholdexcept 3 ,
+.Xr fenv 3 ,
+.Xr feupdateenv 3 ,
+.Xr fpgetsticky 3 ,
+.Xr fpresetsticky 3
+.Sh STANDARDS
+The
+.Fn feclearexcept ,
+.Fn fegetexceptflag ,
+.Fn feraiseexcept ,
+.Fn fesetexceptflag ,
+and
+.Fn fetestexcept
+routines conform to
+.St -isoC-99 .
+.Sh HISTORY
+These functions first appeared in
+.Fx 5.3 .
diff --git a/libm/man/feenableexcept.3 b/libm/man/feenableexcept.3
new file mode 100644
index 0000000..0b790e7
--- /dev/null
+++ b/libm/man/feenableexcept.3
@@ -0,0 +1,98 @@
+.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/feenableexcept.3,v 1.1 2005/03/16 19:04:28 das Exp $
+.\"
+.Dd March 16, 2005
+.Dt FEENABLEEXCEPT 3
+.Os
+.Sh NAME
+.Nm feenableexcept ,
+.Nm fedisableexcept ,
+.Nm fegetexcept
+.Nd floating-point exception masking
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In fenv.h
+.Fd "#pragma STDC FENV_ACCESS ON"
+.Ft int
+.Fn feenableexcept "int excepts"
+.Ft int
+.Fn fedisableexcept "int excepts"
+.Ft int
+.Fn fegetexcept "void"
+.Sh DESCRIPTION
+The
+.Fn feenableexcept
+and
+.Fn fedisableexcept
+functions
+unmask and mask (respectively) exceptions specified in
+.Fa excepts .
+The
+.Fn fegetexcept
+function
+returns the current exception mask.
+All exceptions are masked by default.
+.Pp
+Floating-point operations that produce unmasked exceptions will trap, and a
+.Dv SIGFPE
+will be delivered to the process.
+By installing a signal handler for
+.Dv SIGFPE ,
+applications can take appropriate action immediately without
+testing the exception flags after every operation.
+Note that the trap may not be immediate, but it should occur
+before the next floating-point instruction is executed.
+.Pp
+For all of these functions, the possible types of exceptions
+include those described in
+.Xr fenv 3 .
+Some architectures may define other types of floating-point exceptions.
+.Sh RETURN VALUES
+The
+.Fn feenableexcept ,
+.Fn fedisableexcept ,
+and
+.Fn fegetexcept
+functions return a bitmap of the exceptions that were unmasked
+prior to the call.
+.Sh SEE ALSO
+.Xr sigaction 2 ,
+.Xr feclearexcept 3 ,
+.Xr feholdexcept 3 ,
+.Xr fenv 3 ,
+.Xr feupdateenv 3
+.Sh BUGS
+Functions in the standard library may trigger exceptions multiple
+times as a result of intermediate computations;
+however, they generally do not trigger spurious exceptions.
+.Pp
+No interface is provided to permit exceptions to be handled in
+nontrivial ways.
+There is no uniform way for an exception handler to access
+information about the exception-causing instruction, or
+to determine whether that instruction should be reexecuted
+after returning from the handler.
diff --git a/libm/man/fegetenv.3 b/libm/man/fegetenv.3
new file mode 100644
index 0000000..2e386ad
--- /dev/null
+++ b/libm/man/fegetenv.3
@@ -0,0 +1,113 @@
+.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/fegetenv.3,v 1.1 2004/06/06 10:06:26 das Exp $
+.\"
+.Dd May 8, 2004
+.Dt FEGETENV 3
+.Os
+.Sh NAME
+.Nm fegetenv ,
+.Nm feholdexcept ,
+.Nm fesetenv ,
+.Nm feupdateenv
+.Nd floating-point environment save and restore
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In fenv.h
+.Fd "#pragma STDC FENV_ACCESS ON"
+.Ft int
+.Fn fegetenv "fenv_t *envp"
+.Ft int
+.Fn feholdexcept "fenv_t *envp"
+.Ft int
+.Fn fesetenv "const fenv_t *envp"
+.Ft int
+.Fn feupdateenv "const fenv_t *envp"
+.Sh DESCRIPTION
+The floating-point environment includes exception flags and masks, the
+current rounding mode, and other architecture-specific settings.
+However, it does not include the floating-point register file.
+.Pp
+The
+.Fn fegetenv
+function stores the current floating-point environment in the object
+pointed to by
+.Fa envp ,
+whereas
+.Fn feholdexcept
+saves the current environment, then clears all exception flags
+and masks all floating-point exceptions.
+.Pp
+The
+.Fn fesetenv
+function restores a previously saved environment.
+The
+.Fn feupdateenv
+function restores a saved environment as well, but it also
+raises any exceptions that were set in the environment it
+replaces.
+.Pp
+The
+.Fn feholdexcept
+function is often used with
+.Fn feupdateenv
+or
+.Fn fesetenv
+to suppress spurious exceptions that occur as a result of
+intermediate computations.
+An example in
+.Xr fenv 3
+demonstrates how to do this.
+.Sh RETURN VALUES
+The
+.Fn fegetenv ,
+.Fn feholdexcept ,
+.Fn fesetenv ,
+and
+.Fn feupdateenv
+functions return 0 if they succeed, and non-zero otherwise.
+.Sh SEE ALSO
+.Xr feclearexcept 3 ,
+.Xr fenv 3 ,
+.Xr feraiseexcept 3 ,
+.Xr fesetenv 3 ,
+.Xr fetestexcept 3 ,
+.Xr fpgetmask 3 ,
+.Xr fpgetprec 3 ,
+.Xr fpsetmask 3 ,
+.Xr fpsetprec 3
+.Sh STANDARDS
+The
+.Fn fegetenv ,
+.Fn feholdexcept ,
+.Fn fesetenv ,
+and
+.Fn feupdateenv
+functions conform to
+.St -isoC-99 .
+.Sh HISTORY
+These routines first appeared in
+.Fx 5.3 .
diff --git a/libm/man/fegetround.3 b/libm/man/fegetround.3
new file mode 100644
index 0000000..9384158
--- /dev/null
+++ b/libm/man/fegetround.3
@@ -0,0 +1,83 @@
+.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/fegetround.3,v 1.2 2005/01/14 09:12:05 ru Exp $
+.\"
+.Dd May 8, 2004
+.Dt FEGETROUND 3
+.Os
+.Sh NAME
+.Nm fegetround ,
+.Nm fesetround
+.Nd floating-point rounding control
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In fenv.h
+.Fd "#pragma STDC FENV_ACCESS ON"
+.Ft int
+.Fn fegetround void
+.Ft int
+.Fn fesetround "int round"
+.Sh DESCRIPTION
+The
+.Fn fegetround
+function determines the current floating-point rounding mode,
+and the
+.Fn fesetround
+function sets the current rounding mode to
+.Fa round .
+The rounding mode is one of
+.Dv FE_TONEAREST , FE_DOWNWARD , FE_UPWARD ,
+or
+.Dv FE_TOWARDZERO ,
+as described in
+.Xr fenv 3 .
+.Sh RETURN VALUES
+The
+.Fn fegetround
+routine returns the current rounding mode.
+The
+.Fn fesetround
+function returns 0 on success and non-zero otherwise;
+however, the present implementation always succeeds.
+.Sh SEE ALSO
+.Xr fenv 3 ,
+.Xr fpgetround 3 ,
+.Xr fpsetround 3
+.Sh STANDARDS
+The
+.Fn fegetround
+and
+.Fn fesetround
+functions conform to
+.St -isoC-99 .
+.Sh HISTORY
+These routines first appeared in
+.Fx 5.3 .
+They supersede the non-standard
+.Xr fpgetround 3
+and
+.Xr fpsetround 3
+functions.
diff --git a/libm/man/fenv.3 b/libm/man/fenv.3
new file mode 100644
index 0000000..33ad541
--- /dev/null
+++ b/libm/man/fenv.3
@@ -0,0 +1,289 @@
+.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/fenv.3,v 1.5 2005/06/15 19:04:04 ru Exp $
+.\"
+.Dd March 16, 2005
+.Dt FENV 3
+.Os
+.Sh NAME
+.Nm feclearexcept ,
+.Nm fegetexceptflag ,
+.Nm feraiseexcept ,
+.Nm fesetexceptflag ,
+.Nm fetestexcept ,
+.Nm fegetround ,
+.Nm fesetround ,
+.Nm fegetenv ,
+.Nm feholdexcept ,
+.Nm fesetenv ,
+.Nm feupdateenv ,
+.Nm feenableexcept ,
+.Nm fedisableexcept ,
+.Nm fegetexcept
+.Nd floating-point environment control
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In fenv.h
+.Fd "#pragma STDC FENV_ACCESS ON"
+.Ft int
+.Fn feclearexcept "int excepts"
+.Ft int
+.Fn fegetexceptflag "fexcept_t *flagp" "int excepts"
+.Ft int
+.Fn feraiseexcept "int excepts"
+.Ft int
+.Fn fesetexceptflag "const fexcept_t *flagp" "int excepts"
+.Ft int
+.Fn fetestexcept "int excepts"
+.Ft int
+.Fn fegetround void
+.Ft int
+.Fn fesetround "int round"
+.Ft int
+.Fn fegetenv "fenv_t *envp"
+.Ft int
+.Fn feholdexcept "fenv_t *envp"
+.Ft int
+.Fn fesetenv "const fenv_t *envp"
+.Ft int
+.Fn feupdateenv "const fenv_t *envp"
+.Ft int
+.Fn feenableexcept "int excepts"
+.Ft int
+.Fn fedisableexcept "int excepts"
+.Ft int
+.Fn fegetexcept void
+.Sh DESCRIPTION
+The
+.In fenv.h
+routines manipulate the floating-point environment,
+which includes the exception flags and rounding modes defined in
+.St -ieee754 .
+.Ss Exceptions
+Exception flags are set as side-effects of floating-point arithmetic
+operations and math library routines, and they remain set until
+explicitly cleared.
+The following macros expand to bit flags of type
+.Vt int
+representing the five standard floating-point exceptions.
+.Bl -tag -width ".Dv FE_DIVBYZERO"
+.It Dv FE_DIVBYZERO
+A divide-by-zero exception occurs when the program attempts to
+divide a finite non-zero number by zero.
+.It Dv FE_INEXACT
+An inexact exception is raised whenever there is a loss of precision
+due to rounding.
+.It Dv FE_INVALID
+Invalid operation exceptions occur when a program attempts to
+perform calculations for which there is no reasonable representable
+answer.
+For instance, subtraction of infinities, division of zero by zero,
+ordered comparison involving \*(Nas, and taking the square root of a
+negative number are all invalid operations.
+.It Dv FE_OVERFLOW
+An overflow exception occurs when the magnitude of the result of a
+computation is too large to fit in the destination type.
+.It Dv FE_UNDERFLOW
+Underflow occurs when the result of a computation is too close to zero
+to be represented as a non-zero value in the destination type.
+.El
+.Pp
+Additionally, the
+.Dv FE_ALL_EXCEPT
+macro expands to the bitwise OR of the above flags and any
+architecture-specific flags.
+Combinations of these flags are passed to the
+.Fn feclearexcept ,
+.Fn fegetexceptflag ,
+.Fn feraiseexcept ,
+.Fn fesetexceptflag ,
+and
+.Fn fetestexcept
+functions to clear, save, raise, restore, and examine the
+processor's floating-point exception flags, respectively.
+.Pp
+Exceptions may be
+.Em unmasked
+with
+.Fn feenableexcept
+and masked with
+.Fn fedisableexcept .
+Unmasked exceptions cause a trap when they are produced, and
+all exceptions are masked by default.
+The current mask can be tested with
+.Fn fegetexcept .
+.Ss Rounding Modes
+.St -ieee754
+specifies four rounding modes.
+These modes control the direction in which results are rounded
+from their exact values in order to fit them into binary
+floating-point variables.
+The four modes correspond with the following symbolic constants.
+.Bl -tag -width ".Dv FE_TOWARDZERO"
+.It Dv FE_TONEAREST
+Results are rounded to the closest representable value.
+If the exact result is exactly half way between two representable
+values, the value whose last binary digit is even (zero) is chosen.
+This is the default mode.
+.It Dv FE_DOWNWARD
+Results are rounded towards negative \*[If].
+.It Dv FE_UPWARD
+Results are rounded towards positive \*[If].
+.It Dv FE_TOWARDZERO
+Results are rounded towards zero.
+.El
+.Pp
+The
+.Fn fegetround
+and
+.Fn fesetround
+functions query and set the rounding mode.
+.Ss Environment Control
+The
+.Fn fegetenv
+and
+.Fn fesetenv
+functions save and restore the floating-point environment,
+which includes exception flags, the current exception mask,
+the rounding mode, and possibly other implementation-specific
+state.
+The
+.Fn feholdexcept
+function behaves like
+.Fn fegetenv ,
+but with the additional effect of clearing the exception flags and
+installing a
+.Em non-stop
+mode.
+In non-stop mode, floating-point operations will set exception flags
+as usual, but no
+.Dv SIGFPE
+signals will be generated as a result.
+Non-stop mode is the default, but it may be altered by
+non-standard mechanisms.
+.\" XXX Mention fe[gs]etmask() here after the interface is finalized
+.\" XXX and ready to be officially documented.
+The
+.Fn feupdateenv
+function restores a saved environment similarly to
+.Fn fesetenv ,
+but it also re-raises any floating-point exceptions from the old
+environment.
+.Pp
+The macro
+.Dv FE_DFL_ENV
+expands to a pointer to the default environment.
+.Sh CAVEATS
+The FENV_ACCESS pragma can be enabled with
+.Dl "#pragma STDC FENV_ACCESS ON"
+and disabled with the
+.Dl "#pragma STDC FENV_ACCESS OFF"
+directive.
+This lexically-scoped annotation tells the compiler that the program
+may access the floating-point environment, so optimizations that would
+violate strict IEEE-754 semantics are disabled.
+If execution reaches a block of code for which
+.Dv FENV_ACCESS
+is off, the floating-point environment will become undefined.
+.Sh EXAMPLES
+The following routine computes the square root function.
+It explicitly raises an invalid exception on appropriate inputs using
+.Fn feraiseexcept .
+It also defers inexact exceptions while it computes intermediate
+values, and then it allows an inexact exception to be raised only if
+the final answer is inexact.
+.Bd -literal -offset indent
+#pragma STDC FENV_ACCESS ON
+double sqrt(double n) {
+	double x = 1.0;
+	fenv_t env;
+
+	if (isnan(n) || n < 0.0) {
+		feraiseexcept(FE_INVALID);
+		return (NAN);
+	}
+	if (isinf(n) || n == 0.0)
+		return (n);
+	feholdexcept(&env);
+	while (fabs((x * x) - n) > DBL_EPSILON * 2 * x)
+		x = (x / 2) + (n / (2 * x));
+	if (x * x == n)
+		feclearexcept(FE_INEXACT);
+	feupdateenv(&env);
+	return (x);
+}
+.Ed
+.Sh SEE ALSO
+.Xr cc 1 ,
+.Xr feclearexcept 3 ,
+.Xr fedisableexcept 3 ,
+.Xr feenableexcept 3 ,
+.Xr fegetenv 3 ,
+.Xr fegetexcept 3 ,
+.Xr fegetexceptflag 3 ,
+.Xr fegetround 3 ,
+.Xr feholdexcept 3 ,
+.Xr feraiseexcept 3 ,
+.Xr fesetenv 3 ,
+.Xr fesetexceptflag 3 ,
+.Xr fesetround 3 ,
+.Xr fetestexcept 3 ,
+.Xr feupdateenv 3 ,
+.Xr fpgetprec 3 ,
+.Xr fpsetprec 3
+.Sh STANDARDS
+Except as noted below,
+.In fenv.h
+conforms to
+.St -isoC-99 .
+The
+.Fn feenableexcept ,
+.Fn fedisableexcept ,
+and
+.Fn fegetexcept
+routines are extensions.
+.Sh HISTORY
+The
+.In fenv.h
+header first appeared in
+.Fx 5.3 .
+It supersedes the non-standard routines defined in
+.In ieeefp.h
+and documented in
+.Xr fpgetround 3 .
+.Sh BUGS
+The
+.Dv FENV_ACCESS
+pragma is unimplemented in the system compiler.
+However, non-constant expressions generally produce the correct
+side-effects at low optimization levels.
+.Pp
+On the Alpha platform,
+.Xr cc 1
+must be passed the
+.Fl mieee-with-inexact mfp-rounding-mode=d
+options in order to generate code that has the standard
+side-effects and uses the specified rounding modes.
diff --git a/libm/man/floor.3 b/libm/man/floor.3
new file mode 100644
index 0000000..1f02daf
--- /dev/null
+++ b/libm/man/floor.3
@@ -0,0 +1,82 @@
+.\" Copyright (c) 1985, 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)floor.3	6.5 (Berkeley) 4/19/91
+.\" $FreeBSD: src/lib/msun/man/floor.3,v 1.17 2005/01/13 09:35:47 ru Exp $
+.\"
+.Dd January 13, 2005
+.Dt FLOOR 3
+.Os
+.Sh NAME
+.Nm floor ,
+.Nm floorf ,
+.Nm floorl
+.Nd largest integral value less than or equal to x
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn floor "double x"
+.Ft float
+.Fn floorf "float x"
+.Ft "long double"
+.Fn floorl "long double x"
+.Sh DESCRIPTION
+The
+.Fn floor ,
+.Fn floorf
+and
+.Fn floorl
+functions return the largest integral value
+less than or equal to
+.Fa x ,
+expressed as a floating-point number.
+.Sh SEE ALSO
+.Xr abs 3 ,
+.Xr ceil 3 ,
+.Xr fabs 3 ,
+.Xr ieee 3 ,
+.Xr math 3 ,
+.Xr rint 3 ,
+.Xr round 3 ,
+.Xr trunc 3
+.Sh STANDARDS
+The
+.Fn floor
+function conforms to
+.St -isoC .
+The
+.Fn floorf
+and
+.Fn floorl
+functions conform to
+.St -isoC-99 .
diff --git a/libm/man/fma.3 b/libm/man/fma.3
new file mode 100644
index 0000000..078a6e2
--- /dev/null
+++ b/libm/man/fma.3
@@ -0,0 +1,116 @@
+.\" Copyright (c) 2005 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/fma.3,v 1.3 2005/11/24 09:25:10 joel Exp $
+.\"
+.Dd January 22, 2005
+.Dt FMA 3
+.Os
+.Sh NAME
+.Nm fma ,
+.Nm fmaf ,
+.Nm fmal
+.Nd fused multiply-add
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn fma "double x" "double y" "double z"
+.Ft float
+.Fn fmaf "float x" "float y" "float z"
+.Ft long double
+.Fn fmal "long double x" "long double y" "long double z"
+.Sh DESCRIPTION
+The
+.Fn fma ,
+.Fn fmaf ,
+and
+.Fn fmal
+functions return
+.No "(x * y) + z" ,
+computed with only one rounding error.
+Using the ordinary multiplication and addition operators, by contrast,
+results in two roundings: one for the intermediate product and one for
+the final result.
+.Pp
+For instance, the expression
+.No "1.2e100 * 2.0e208 - 1.4e308"
+produces \*(If due to overflow in the intermediate product, whereas
+.No "fma(1.2e100, 2.0e208, -1.4e308)"
+returns approximately 1.0e308.
+.Pp
+The fused multiply-add operation is often used to improve the
+accuracy of calculations such as dot products.
+It may also be used to improve performance on machines that implement
+it natively.
+The macros
+.Dv FP_FAST_FMA ,
+.Dv FP_FAST_FMAF
+and
+.Dv FP_FAST_FMAL
+may be defined in
+.In math.h
+to indicate that
+.Fn fma ,
+.Fn fmaf ,
+and
+.Fn fmal
+(respectively) have comparable or faster speed than a multiply
+operation followed by an add operation.
+.Sh IMPLEMENTATION NOTES
+In general, these routines will behave as one would expect if
+.No "x * y + z"
+were computed with unbounded precision and range,
+then rounded to the precision of the return type.
+However, on some platforms, if
+.Fa z
+is \*(Na, these functions may not raise an exception even
+when the computation of
+.No "x * y"
+would have otherwise generated an invalid exception.
+.Sh SEE ALSO
+.Xr fenv 3 ,
+.Xr math 3
+.Sh STANDARDS
+The
+.Fn fma ,
+.Fn fmaf ,
+and
+.Fn fmal
+functions conform to
+.St -isoC-99 .
+A fused multiply-add operation with virtually identical
+characteristics appears in IEEE draft standard 754R.
+.Sh HISTORY
+The
+.Fn fma
+and
+.Fn fmaf
+routines first appeared in
+.Fx 5.4 ,
+and
+.Fn fmal
+appeared in
+.Fx 6.0 .
diff --git a/libm/man/fmax.3 b/libm/man/fmax.3
new file mode 100644
index 0000000..03249a3
--- /dev/null
+++ b/libm/man/fmax.3
@@ -0,0 +1,97 @@
+.\" Copyright (c) 2004 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/fmax.3,v 1.2 2005/01/14 09:12:05 ru Exp $
+.\"
+.Dd June 29, 2004
+.Dt FMAX 3
+.Os
+.Sh NAME
+.Nm fmax ,
+.Nm fmaxf ,
+.Nm fmaxl ,
+.Nm fmin ,
+.Nm fminf ,
+.Nm fminl
+.Nd floating-point maximum and minimum functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn fmax "double x" "double y"
+.Ft float
+.Fn fmaxf "float x" "float y"
+.Ft "long double"
+.Fn fmaxl "long double x" "long double y"
+.Ft double
+.Fn fmin "double x" "double y"
+.Ft float
+.Fn fminf "float x" "float y"
+.Ft "long double"
+.Fn fminl "long double x" "long double y"
+.Sh DESCRIPTION
+The
+.Fn fmax ,
+.Fn fmaxf ,
+and
+.Fn fmaxl
+functions return the larger of
+.Fa x
+and
+.Fa y ,
+and likewise, the
+.Fn fmin ,
+.Fn fminf ,
+and
+.Fn fminl
+functions return the smaller of
+.Fa x
+and
+.Fa y .
+They treat
+.Li +0.0
+as being larger than
+.Li -0.0 .
+If one argument is an \*(Na, then the other argument is returned.
+If both arguments are \*(Nas, then the result is an \*(Na.
+These routines do not raise any floating-point exceptions.
+.Sh SEE ALSO
+.Xr fabs 3 ,
+.Xr fdim 3 ,
+.Xr math 3
+.Sh STANDARDS
+The
+.Fn fmax ,
+.Fn fmaxf ,
+.Fn fmaxl ,
+.Fn fmin ,
+.Fn fminf ,
+and
+.Fn fminl
+functions conform to
+.St -isoC-99 .
+.Sh HISTORY
+These routines first appeared in
+.Fx 5.3 .
diff --git a/libm/man/fmod.3 b/libm/man/fmod.3
new file mode 100644
index 0000000..c0d4ed8
--- /dev/null
+++ b/libm/man/fmod.3
@@ -0,0 +1,87 @@
+.\" Copyright (c) 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)fmod.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/fmod.3,v 1.8 2001/10/13 12:23:23 bde Exp $
+.\"
+.Dd May 2, 1991
+.Dt FMOD 3
+.Os
+.Sh NAME
+.Nm fmod ,
+.Nm fmodf
+.Nd floating-point remainder functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn fmod "double x" "double y"
+.Ft float
+.Fn fmodf "float x" "float y"
+.Sh DESCRIPTION
+The
+.Fn fmod
+and the
+.Fn fmodf
+functions compute the floating-point remainder of
+.Fa x Ns / Fa y .
+.Sh RETURN VALUES
+The
+.Fn fmod
+and the
+.Fn fmodf
+functions return the value
+.Sm off
+.Fa x - Em i * Fa y ,
+.Sm on
+for some integer
+.Em i
+such that, if
+.Fa y
+is non-zero, the result has the same sign as
+.Fa x
+and magnitude less than the magnitude of
+.Fa y .
+If
+.Fa y
+is zero, whether a domain error occurs or the
+.Fn fmod
+and the
+.Fn fmodf
+function returns zero is implementation-defined.
+.Sh SEE ALSO
+.Xr math 3
+.Sh STANDARDS
+The
+.Fn fmod
+function conforms to
+.St -isoC .
diff --git a/libm/man/hypot.3 b/libm/man/hypot.3
new file mode 100644
index 0000000..a92a2a6
--- /dev/null
+++ b/libm/man/hypot.3
@@ -0,0 +1,134 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)hypot.3	6.7 (Berkeley) 5/6/91
+.\" $FreeBSD: src/lib/msun/man/hypot.3,v 1.13 2005/01/14 23:28:28 das Exp $
+.\"
+.Dd January 14, 2005
+.Dt HYPOT 3
+.Os
+.Sh NAME
+.Nm hypot ,
+.Nm hypotf ,
+.Nm cabs ,
+.Nm cabsf
+.Nd Euclidean distance and complex absolute value functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn hypot "double x" "double y"
+.Ft float
+.Fn hypotf "float x" "float y"
+.In complex.h
+.Ft double
+.Fn cabs "double complex z"
+.Ft float
+.Fn cabsf "float complex z"
+.Sh DESCRIPTION
+The
+.Fn hypot
+and
+.Fn hypotf
+functions
+compute the
+sqrt(x*x+y*y)
+in such a way that underflow will not happen, and overflow
+occurs only if the final result deserves it.
+The
+.Fn cabs
+and
+.Fn cabsf
+functions compute the complex absolute value of
+.Fa z .
+.Pp
+.Fn hypot "\*(If" "v"
+=
+.Fn hypot "v" "\*(If"
+= +\*(If for all
+.Fa v ,
+including \*(Na.
+.Sh ERROR (due to Roundoff, etc.)
+Below 0.97
+.Em ulps .
+Consequently
+.Fn hypot "5.0" "12.0"
+= 13.0
+exactly;
+in general, hypot and cabs return an integer whenever an
+integer might be expected.
+.Pp
+The same cannot be said for the shorter and faster version of hypot
+and cabs that is provided in the comments in cabs.c; its error can
+exceed 1.2
+.Em ulps .
+.Sh NOTES
+As might be expected,
+.Fn hypot "v" "\*(Na"
+and
+.Fn hypot "\*(Na" "v"
+are \*(Na for all
+.Em finite
+.Fa v .
+But programmers
+might be surprised at first to discover that
+.Fn hypot "\(+-\*(If" "\*(Na"
+= +\*(If.
+This is intentional; it happens because
+.Fn hypot "\*(If" "v"
+= +\*(If
+for
+.Em all
+.Fa v ,
+finite or infinite.
+Hence
+.Fn hypot "\*(If" "v"
+is independent of
+.Fa v .
+Unlike the reserved operand fault on a
+.Tn VAX ,
+the
+.Tn IEEE
+\*(Na is designed to
+disappear when it turns out to be irrelevant, as it does in
+.Fn hypot "\*(If" "\*(Na" .
+.Sh SEE ALSO
+.Xr math 3 ,
+.Xr sqrt 3
+.Sh HISTORY
+Both a
+.Fn hypot
+function and a
+.Fn cabs
+function
+appeared in
+.At v7 .
diff --git a/libm/man/ieee.3 b/libm/man/ieee.3
new file mode 100644
index 0000000..3b7087d
--- /dev/null
+++ b/libm/man/ieee.3
@@ -0,0 +1,448 @@
+.\" Copyright (c) 1985 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: src/lib/msun/man/ieee.3,v 1.22 2005/06/16 21:55:45 ru Exp $
+.\"
+.Dd January 26, 2005
+.Dt IEEE 3
+.Os
+.Sh NAME
+.Nm ieee
+.Nd IEEE standard 754 for floating-point arithmetic
+.Sh DESCRIPTION
+The IEEE Standard 754 for Binary Floating-Point Arithmetic
+defines representations of floating-point numbers and abstract
+properties of arithmetic operations relating to precision,
+rounding, and exceptional cases, as described below.
+.Ss IEEE STANDARD 754 Floating-Point Arithmetic
+Radix: Binary.
+.Pp
+Overflow and underflow:
+.Bd -ragged -offset indent -compact
+Overflow goes by default to a signed \*(If.
+Underflow is
+.Em gradual .
+.Ed
+.Pp
+Zero is represented ambiguously as +0 or \-0.
+.Bd -ragged -offset indent -compact
+Its sign transforms correctly through multiplication or
+division, and is preserved by addition of zeros
+with like signs; but x\-x yields +0 for every
+finite x.
+The only operations that reveal zero's
+sign are division by zero and
+.Fn copysign x \(+-0 .
+In particular, comparison (x > y, x \(>= y, etc.)\&
+cannot be affected by the sign of zero; but if
+finite x = y then \*(If = 1/(x\-y) \(!= \-1/(y\-x) = \-\*(If.
+.Ed
+.Pp
+Infinity is signed.
+.Bd -ragged -offset indent -compact
+It persists when added to itself
+or to any finite number.
+Its sign transforms
+correctly through multiplication and division, and
+(finite)/\(+-\*(If\0=\0\(+-0
+(nonzero)/0 = \(+-\*(If.
+But
+\*(If\-\*(If, \*(If\(**0 and \*(If/\*(If
+are, like 0/0 and sqrt(\-3),
+invalid operations that produce \*(Na. ...
+.Ed
+.Pp
+Reserved operands (\*(Nas):
+.Bd -ragged -offset indent -compact
+An \*(Na is
+.Em ( N Ns ot Em a N Ns umber ) .
+Some \*(Nas, called Signaling \*(Nas, trap any floating-point operation
+performed upon them; they are used to mark missing
+or uninitialized values, or nonexistent elements
+of arrays.
+The rest are Quiet \*(Nas; they are
+the default results of Invalid Operations, and
+propagate through subsequent arithmetic operations.
+If x \(!= x then x is \*(Na; every other predicate
+(x > y, x = y, x < y, ...) is FALSE if \*(Na is involved.
+.Ed
+.Pp
+Rounding:
+.Bd -ragged -offset indent -compact
+Every algebraic operation (+, \-, \(**, /,
+\(sr)
+is rounded by default to within half an
+.Em ulp ,
+and when the rounding error is exactly half an
+.Em ulp
+then
+the rounded value's least significant bit is zero.
+(An
+.Em ulp
+is one
+.Em U Ns nit
+in the
+.Em L Ns ast
+.Em P Ns lace . )
+This kind of rounding is usually the best kind,
+sometimes provably so; for instance, for every
+x = 1.0, 2.0, 3.0, 4.0, ..., 2.0**52, we find
+(x/3.0)\(**3.0 == x and (x/10.0)\(**10.0 == x and ...
+despite that both the quotients and the products
+have been rounded.
+Only rounding like IEEE 754 can do that.
+But no single kind of rounding can be
+proved best for every circumstance, so IEEE 754
+provides rounding towards zero or towards
++\*(If or towards \-\*(If
+at the programmer's option.
+.Ed
+.Pp
+Exceptions:
+.Bd -ragged -offset indent -compact
+IEEE 754 recognizes five kinds of floating-point exceptions,
+listed below in declining order of probable importance.
+.Bl -column -offset indent "Invalid Operation" "Gradual Underflow"
+.Em "Exception	Default Result"
+Invalid Operation	\*(Na, or FALSE
+Overflow	\(+-\*(If
+Divide by Zero	\(+-\*(If
+Underflow	Gradual Underflow
+Inexact	Rounded value
+.El
+.Pp
+NOTE: An Exception is not an Error unless handled
+badly.
+What makes a class of exceptions exceptional
+is that no single default response can be satisfactory
+in every instance.
+On the other hand, if a default
+response will serve most instances satisfactorily,
+the unsatisfactory instances cannot justify aborting
+computation every time the exception occurs.
+.Ed
+.Ss Data Formats
+Single-precision:
+.Bd -ragged -offset indent -compact
+Type name:
+.Vt float
+.Pp
+Wordsize: 32 bits.
+.Pp
+Precision: 24 significant bits,
+roughly like 7 significant decimals.
+.Bd -ragged -offset indent -compact
+If x and x' are consecutive positive single-precision
+numbers (they differ by 1
+.Em ulp ) ,
+then
+.Bd -ragged -compact
+5.9e\-08 < 0.5**24 < (x'\-x)/x \(<= 0.5**23 < 1.2e\-07.
+.Ed
+.Ed
+.Pp
+.Bl -column "XXX" -compact
+Range:	Overflow threshold  = 2.0**128 = 3.4e38
+	Underflow threshold = 0.5**126 = 1.2e\-38
+.El
+.Bd -ragged -offset indent -compact
+Underflowed results round to the nearest
+integer multiple of 0.5**149 = 1.4e\-45.
+.Ed
+.Ed
+.Pp
+Double-precision:
+.Bd -ragged -offset indent -compact
+Type name:
+.Vt double
+.Bd -ragged -offset indent -compact
+On some architectures,
+.Vt long double
+is the the same as
+.Vt double .
+.Ed
+.Pp
+Wordsize: 64 bits.
+.Pp
+Precision: 53 significant bits,
+roughly like 16 significant decimals.
+.Bd -ragged -offset indent -compact
+If x and x' are consecutive positive double-precision
+numbers (they differ by 1
+.Em ulp ) ,
+then
+.Bd -ragged -compact
+1.1e\-16 < 0.5**53 < (x'\-x)/x \(<= 0.5**52 < 2.3e\-16.
+.Ed
+.Ed
+.Pp
+.Bl -column "XXX" -compact
+Range:	Overflow threshold  = 2.0**1024 = 1.8e308
+	Underflow threshold = 0.5**1022 = 2.2e\-308
+.El
+.Bd -ragged -offset indent -compact
+Underflowed results round to the nearest
+integer multiple of 0.5**1074 = 4.9e\-324.
+.Ed
+.Ed
+.Pp
+Extended-precision:
+.Bd -ragged -offset indent -compact
+Type name:
+.Vt long double
+(when supported by the hardware)
+.Pp
+Wordsize: 96 bits.
+.Pp
+Precision: 64 significant bits,
+roughly like 19 significant decimals.
+.Bd -ragged -offset indent -compact
+If x and x' are consecutive positive double-precision
+numbers (they differ by 1
+.Em ulp ) ,
+then
+.Bd -ragged -compact
+1.0e\-19 < 0.5**63 < (x'\-x)/x \(<= 0.5**62 < 2.2e\-19.
+.Ed
+.Ed
+.Pp
+.Bl -column "XXX" -compact
+Range:	Overflow threshold  = 2.0**16384 = 1.2e4932
+	Underflow threshold = 0.5**16382 = 3.4e\-4932
+.El
+.Bd -ragged -offset indent -compact
+Underflowed results round to the nearest
+integer multiple of 0.5**16445 = 5.7e\-4953.
+.Ed
+.Ed
+.Pp
+Quad-extended-precision:
+.Bd -ragged -offset indent -compact
+Type name:
+.Vt long double
+(when supported by the hardware)
+.Pp
+Wordsize: 128 bits.
+.Pp
+Precision: 113 significant bits,
+roughly like 34 significant decimals.
+.Bd -ragged -offset indent -compact
+If x and x' are consecutive positive double-precision
+numbers (they differ by 1
+.Em ulp ) ,
+then
+.Bd -ragged -compact
+9.6e\-35 < 0.5**113 < (x'\-x)/x \(<= 0.5**112 < 2.0e\-34.
+.Ed
+.Ed
+.Pp
+.Bl -column "XXX" -compact
+Range:	Overflow threshold  = 2.0**16384 = 1.2e4932
+	Underflow threshold = 0.5**16382 = 3.4e\-4932
+.El
+.Bd -ragged -offset indent -compact
+Underflowed results round to the nearest
+integer multiple of 0.5**16494 = 6.5e\-4966.
+.Ed
+.Ed
+.Ss Additional Information Regarding Exceptions
+.Pp
+For each kind of floating-point exception, IEEE 754
+provides a Flag that is raised each time its exception
+is signaled, and stays raised until the program resets
+it.
+Programs may also test, save and restore a flag.
+Thus, IEEE 754 provides three ways by which programs
+may cope with exceptions for which the default result
+might be unsatisfactory:
+.Bl -enum
+.It
+Test for a condition that might cause an exception
+later, and branch to avoid the exception.
+.It
+Test a flag to see whether an exception has occurred
+since the program last reset its flag.
+.It
+Test a result to see whether it is a value that only
+an exception could have produced.
+.Pp
+CAUTION: The only reliable ways to discover
+whether Underflow has occurred are to test whether
+products or quotients lie closer to zero than the
+underflow threshold, or to test the Underflow
+flag.
+(Sums and differences cannot underflow in
+IEEE 754; if x \(!= y then x\-y is correct to
+full precision and certainly nonzero regardless of
+how tiny it may be.)
+Products and quotients that
+underflow gradually can lose accuracy gradually
+without vanishing, so comparing them with zero
+(as one might on a VAX) will not reveal the loss.
+Fortunately, if a gradually underflowed value is
+destined to be added to something bigger than the
+underflow threshold, as is almost always the case,
+digits lost to gradual underflow will not be missed
+because they would have been rounded off anyway.
+So gradual underflows are usually
+.Em provably
+ignorable.
+The same cannot be said of underflows flushed to 0.
+.El
+.Pp
+At the option of an implementor conforming to IEEE 754,
+other ways to cope with exceptions may be provided:
+.Bl -enum
+.It
+ABORT.
+This mechanism classifies an exception in
+advance as an incident to be handled by means
+traditionally associated with error-handling
+statements like "ON ERROR GO TO ...".
+Different
+languages offer different forms of this statement,
+but most share the following characteristics:
+.Bl -dash
+.It
+No means is provided to substitute a value for
+the offending operation's result and resume
+computation from what may be the middle of an
+expression.
+An exceptional result is abandoned.
+.It
+In a subprogram that lacks an error-handling
+statement, an exception causes the subprogram to
+abort within whatever program called it, and so
+on back up the chain of calling subprograms until
+an error-handling statement is encountered or the
+whole task is aborted and memory is dumped.
+.El
+.It
+STOP.
+This mechanism, requiring an interactive
+debugging environment, is more for the programmer
+than the program.
+It classifies an exception in
+advance as a symptom of a programmer's error; the
+exception suspends execution as near as it can to
+the offending operation so that the programmer can
+look around to see how it happened.
+Quite often
+the first several exceptions turn out to be quite
+unexceptionable, so the programmer ought ideally
+to be able to resume execution after each one as if
+execution had not been stopped.
+.It
+\&... Other ways lie beyond the scope of this document.
+.El
+.Pp
+Ideally, each
+elementary function should act as if it were indivisible, or
+atomic, in the sense that ...
+.Bl -enum
+.It
+No exception should be signaled that is not deserved by
+the data supplied to that function.
+.It
+Any exception signaled should be identified with that
+function rather than with one of its subroutines.
+.It
+The internal behavior of an atomic function should not
+be disrupted when a calling program changes from
+one to another of the five or so ways of handling
+exceptions listed above, although the definition
+of the function may be correlated intentionally
+with exception handling.
+.El
+.Pp
+The functions in
+.Nm libm
+are only approximately atomic.
+They signal no inappropriate exception except possibly ...
+.Bl -tag -width indent -offset indent -compact
+.It Xo
+Over/Underflow
+.Xc
+when a result, if properly computed, might have lain barely within range, and
+.It Xo
+Inexact in
+.Fn cabs ,
+.Fn cbrt ,
+.Fn hypot ,
+.Fn log10
+and
+.Fn pow
+.Xc
+when it happens to be exact, thanks to fortuitous cancellation of errors.
+.El
+Otherwise, ...
+.Bl -tag -width indent -offset indent -compact
+.It Xo
+Invalid Operation is signaled only when
+.Xc
+any result but \*(Na would probably be misleading.
+.It Xo
+Overflow is signaled only when
+.Xc
+the exact result would be finite but beyond the overflow threshold.
+.It Xo
+Divide-by-Zero is signaled only when
+.Xc
+a function takes exactly infinite values at finite operands.
+.It Xo
+Underflow is signaled only when
+.Xc
+the exact result would be nonzero but tinier than the underflow threshold.
+.It Xo
+Inexact is signaled only when
+.Xc
+greater range or precision would be needed to represent the exact result.
+.El
+.Sh SEE ALSO
+.Xr fenv 3 ,
+.Xr ieee_test 3 ,
+.Xr math 3
+.Pp
+An explanation of IEEE 754 and its proposed extension p854
+was published in the IEEE magazine MICRO in August 1984 under
+the title "A Proposed Radix- and Word-length-independent
+Standard for Floating-point Arithmetic" by
+.An "W. J. Cody"
+et al.
+The manuals for Pascal, C and BASIC on the Apple Macintosh
+document the features of IEEE 754 pretty well.
+Articles in the IEEE magazine COMPUTER vol.\& 14 no.\& 3 (Mar.\&
+1981), and in the ACM SIGNUM Newsletter Special Issue of
+Oct.\& 1979, may be helpful although they pertain to
+superseded drafts of the standard.
+.Sh STANDARDS
+.St -ieee754
diff --git a/libm/man/ieee_test.3 b/libm/man/ieee_test.3
new file mode 100644
index 0000000..debb6c8
--- /dev/null
+++ b/libm/man/ieee_test.3
@@ -0,0 +1,93 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: src/lib/msun/man/ieee_test.3,v 1.13 2005/11/17 13:00:00 ru Exp $
+.\"
+.Dd November 6, 2005
+.Dt IEEE_TEST 3
+.Os
+.Sh NAME
+.Nm scalb ,
+.Nm scalbf ,
+.Nm significand ,
+.Nm significandf
+.Nd IEEE test functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn scalb "double x" "double n"
+.Ft float
+.Fn scalbf "float x" "float n"
+.Ft double
+.Fn significand "double x"
+.Ft float
+.Fn significandf "float x"
+.Sh DESCRIPTION
+These functions allow users to test conformance to
+.St -ieee754 .
+Their use is not otherwise recommended.
+.Pp
+.Fn scalb x n
+and
+.Fn scalbf x n
+return
+.Fa x Ns \(**(2** Ns Fa n )
+computed by exponent manipulation.
+If
+.Fa n
+is not an integer, \*(Pm\*(If, or an \*(Na, the result is unspecified.
+.Pp
+.Fn significand x
+and
+.Fn significandf x
+return
+.Fa sig ,
+where
+.Fa x
+:=
+.Fa sig No \(** 2** Ns Fa n
+with 1 \(<=
+.Fa sig
+< 2.
+.Fn significand x
+and
+.Fn significandf x
+are not defined when
+.Fa x
+is 0, \*(Pm\*(If, or \*(Na.
+.Sh SEE ALSO
+.Xr ieee 3 ,
+.Xr math 3
+.Sh STANDARDS
+.St -ieee754
diff --git a/libm/man/ilogb.3 b/libm/man/ilogb.3
new file mode 100644
index 0000000..00ac754
--- /dev/null
+++ b/libm/man/ilogb.3
@@ -0,0 +1,127 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: src/lib/msun/man/ilogb.3,v 1.3 2005/11/17 13:00:00 ru Exp $
+.\"
+.Dd November 6, 2005
+.Dt ILOGB 3
+.Os
+.Sh NAME
+.Nm ilogb ,
+.Nm ilogbf ,
+.Nm ilogbl ,
+.Nm logb ,
+.Nm logbf
+.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"
+.Ft double
+.Fn logb "double x"
+.Ft float
+.Fn logbf "float x"
+.Sh DESCRIPTION
+.Fn ilogb ,
+.Fn ilogbf
+and
+.Fn ilogbl
+return
+.Fa x Ns 's exponent
+in integer format.
+.Fn ilogb \*(Pm\*(If
+returns
+.Dv INT_MAX ,
+.Fn ilogb \*(Pm\*(Na
+returns
+.Dv FP_ILOGBNAN ,
+and
+.Fn ilogb 0
+returns
+.Dv FP_ILOGB0 .
+.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.
+.Sh SEE ALSO
+.Xr frexp 3 ,
+.Xr ieee 3 ,
+.Xr math 3 ,
+.Xr scalbn 3
+.Sh STANDARDS
+The
+.Fn ilogb ,
+.Fn ilogbf ,
+.Fn ilogbl ,
+.Fn logb
+and
+.Fn logbf
+routines conform to
+.St -isoC-99 .
+.Fn logb
+and
+.Fn logbf
+implement the logb function recommended by
+.St -ieee754 .
+.Sh HISTORY
+The
+.Fn logb
+function appeared in
+.Bx 4.3 .
+The
+.Fn ilogb
+function appeared in
+.Fx 1.1.5 .
+The
+.Fn ilogbf
+and
+.Fn logbf
+functions appeared in
+.Fx 2.0 .
+The
+.Fn ilogbl
+function appeared in
+.Fx 5.4 .
diff --git a/libm/man/j0.3 b/libm/man/j0.3
new file mode 100644
index 0000000..76cd51c
--- /dev/null
+++ b/libm/man/j0.3
@@ -0,0 +1,142 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)j0.3	6.7 (Berkeley) 4/19/91
+.\" $FreeBSD: src/lib/msun/man/j0.3,v 1.13 2005/01/14 23:28:28 das Exp $
+.\"
+.Dd January 14, 2005
+.Dt J0 3
+.Os
+.Sh NAME
+.Nm j0 ,
+.Nm j0f ,
+.Nm j1 ,
+.Nm j1f ,
+.Nm jn ,
+.Nm jnf ,
+.Nm y0 ,
+.Nm y0f ,
+.Nm y1 ,
+.Nm y1f ,
+.Nm yn ,
+.Nm ynf
+.Nd Bessel functions of first and second kind
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn j0 "double x"
+.Ft float
+.Fn j0f "float x"
+.Ft double
+.Fn j1 "double x"
+.Ft float
+.Fn j1f "float x"
+.Ft double
+.Fn jn "int n" "double x"
+.Ft float
+.Fn jnf "int n" "float x"
+.Ft double
+.Fn y0 "double x"
+.Ft float
+.Fn y0f "float x"
+.Ft double
+.Fn y1 "double x"
+.Ft float
+.Fn y1f "float x"
+.Ft double
+.Fn yn "int n" "double x"
+.Ft float
+.Fn ynf "int n" "float x"
+.Sh DESCRIPTION
+The functions
+.Fn j0 ,
+.Fn j0f ,
+.Fn j1
+and
+.Fn j1f
+compute the
+.Em Bessel function of the first kind of the order
+0 and the
+.Em order
+1, respectively,
+for the
+real value
+.Fa x ;
+the functions
+.Fn jn
+and
+.Fn jnf
+compute the
+.Em Bessel function of the first kind of the integer
+.Em order
+.Fa n
+for the real value
+.Fa x .
+.Pp
+The functions
+.Fn y0 ,
+.Fn y0f ,
+.Fn y1 ,
+and
+.Fn y1f
+compute the linearly independent
+.Em Bessel function of the second kind of the order
+0 and the
+.Em order
+1, respectively,
+for the
+positive
+.Em real
+value
+.Fa x ;
+the functions
+.Fn yn
+and
+.Fn ynf
+compute the
+.Em Bessel function of the second kind for the integer
+.Em order
+.Fa n
+for the positive
+.Em real
+value
+.Fa x .
+.Sh RETURN VALUES
+If these functions are successful,
+the computed value is returned.
+.Sh SEE ALSO
+.Xr math 3
+.Sh HISTORY
+This set of functions
+appeared in
+.At v7 .
diff --git a/libm/man/lgamma.3 b/libm/man/lgamma.3
new file mode 100644
index 0000000..0064a48
--- /dev/null
+++ b/libm/man/lgamma.3
@@ -0,0 +1,185 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)lgamma.3	6.6 (Berkeley) 12/3/92
+.\" $FreeBSD: src/lib/msun/man/lgamma.3,v 1.22 2005/01/16 16:46:14 ru Exp $
+.\"
+.Dd January 14, 2005
+.Dt LGAMMA 3
+.Os
+.Sh NAME
+.Nm lgamma ,
+.Nm lgamma_r ,
+.Nm lgammaf ,
+.Nm lgammaf_r ,
+.Nm gamma ,
+.Nm gamma_r ,
+.Nm gammaf ,
+.Nm gammaf_r ,
+.Nm tgamma
+.Nd log gamma functions, gamma function
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft extern int
+.Fa signgam ;
+.sp
+.Ft double
+.Fn lgamma "double x"
+.Ft double
+.Fn lgamma_r "double x" "int *signgamp"
+.Ft float
+.Fn lgammaf "float x"
+.Ft float
+.Fn lgammaf_r "float x" "int *signgamp"
+.Ft double
+.Fn gamma "double x"
+.Ft double
+.Fn gamma_r "double x" "int *signgamp"
+.Ft float
+.Fn gammaf "float x"
+.Ft float
+.Fn gammaf_r "float x" "int *signgamp"
+.Ft double
+.Fn tgamma "double x"
+.Sh DESCRIPTION
+.Fn lgamma x
+and
+.Fn lgammaf x
+.if t \{\
+return ln\||\(*G(x)| where
+.Bd -unfilled -offset indent
+\(*G(x) = \(is\d\s8\z0\s10\u\u\s8\(if\s10\d t\u\s8x\-1\s10\d e\u\s8\-t\s10\d dt	for x > 0 and
+\(*G(x) = \(*p/(\(*G(1\-x)\|sin(\(*px))	for x < 1.
+.Ed
+.\}
+.if n \
+return ln\||\(*G(x)|.
+.Pp
+The external integer
+.Fa signgam
+returns the sign of \(*G(x).
+.Pp
+.Fn lgamma_r x signgamp
+and
+.Fn lgammaf_r x signgamp
+provide the same functionality as
+.Fn lgamma x
+and
+.Fn lgammaf x
+but the caller must provide an integer to store the sign of \(*G(x).
+.Pp
+.Fn gamma ,
+.Fn gammaf ,
+.Fn gamma_r ,
+and
+.Fn gammaf_r
+are deprecated aliases for
+.Fn lgamma ,
+.Fn lgammaf ,
+.Fn lgamma_r ,
+and
+.Fn lgammaf_r ,
+respectively.
+.Fn tgamma x
+returns \(*G(x), with no effect on
+.Fa signgam .
+.Sh IDIOSYNCRASIES
+Do not use the expression
+.Dq Li signgam\(**exp(lgamma(x))
+to compute g := \(*G(x).
+Instead use a program like this (in C):
+.Bd -literal -offset indent
+lg = lgamma(x); g = signgam\(**exp(lg);
+.Ed
+.Pp
+Only after
+.Fn lgamma
+or
+.Fn lgammaf
+has returned can signgam be correct.
+.Pp
+For arguments in its range,
+.Fn tgamma
+is preferred, as for positive arguments
+it is accurate to within one unit in the last place.
+Exponentiation of
+.Fn lgamma
+will lose up to 10 significant bits.
+.Sh RETURN VALUES
+.Fn gamma ,
+.Fn gamma_r ,
+.Fn gammaf ,
+.Fn gammaf_r ,
+.Fn lgamma ,
+.Fn lgamma_r ,
+.Fn lgammaf ,
+and
+.Fn lgammaf_r
+return appropriate values unless an argument is out of range.
+Overflow will occur for sufficiently large positive values, and
+non-positive integers.
+For large non-integer negative values,
+.Fn tgamma
+will underflow.
+.Sh SEE ALSO
+.Xr math 3
+.Sh STANDARDS
+The
+.Fn lgamma
+and
+.Fn tgamma
+functions are expected to conform to
+.St -isoC-99 .
+.Sh HISTORY
+The
+.Fn lgamma
+function appeared in
+.Bx 4.3 .
+The
+.Fn gamma
+function appeared in
+.Bx 4.4
+as a function which computed \(*G(x).
+This version was used in
+.Fx 1.1 .
+The name
+.Fn gamma
+was originally dedicated to the
+.Fn lgamma
+function,
+and that usage was restored by switching to Sun's fdlibm in
+.Fx 1.1.5 .
+The
+.Fn tgamma
+function appeared in
+.Fx 5.0 .
diff --git a/libm/man/lrint.3 b/libm/man/lrint.3
new file mode 100644
index 0000000..d7de093
--- /dev/null
+++ b/libm/man/lrint.3
@@ -0,0 +1,94 @@
+.\" Copyright (c) 2005 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/lrint.3,v 1.2 2005/01/13 10:43:01 ru Exp $
+.\"
+.Dd January 11, 2005
+.Dt LRINT 3
+.Os
+.Sh NAME
+.Nm llrint ,
+.Nm llrintf ,
+.Nm lrint ,
+.Nm lrintf
+.Nd "convert to integer"
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft "long long"
+.Fn llrint "double x"
+.Ft "long long"
+.Fn llrintf "float x"
+.Ft long
+.Fn lrint "double x"
+.Ft long
+.Fn lrintf "float x"
+.Sh DESCRIPTION
+The
+.Fn lrint
+function returns the integer nearest to its argument
+.Fa x
+according to the current rounding mode.
+If the rounded result is too large to be represented as a
+.Vt long
+value, an invalid exception is raised and the return value is undefined.
+Otherwise, if
+.Fa x
+is not an integer,
+.Fn lrint
+raises an inexact exception.
+When the rounded result is representable as a
+.Vt long ,
+the expression
+.Fn lrint x
+is equivalent to
+.Po Vt long Pc Ns Fn rint x
+(although the former may be more efficient).
+.Pp
+The
+.Fn llrint ,
+.Fn llrintf ,
+and
+.Fn lrintf
+functions differ from
+.Fn lrint
+only in their input and output types.
+.Sh SEE ALSO
+.Xr lround 3 ,
+.Xr math 3 ,
+.Xr rint 3 ,
+.Xr round 3
+.Sh STANDARDS
+The
+.Fn llrint ,
+.Fn llrintf ,
+.Fn lrint ,
+and
+.Fn lrintf
+functions conform to
+.St -isoC-99 .
+.Sh HISTORY
+These routines first appeared in
+.Fx 5.4 .
diff --git a/libm/man/lround.3 b/libm/man/lround.3
new file mode 100644
index 0000000..d3e53c2
--- /dev/null
+++ b/libm/man/lround.3
@@ -0,0 +1,112 @@
+.\" Copyright (c) 2005 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/lround.3,v 1.4 2005/06/15 19:04:04 ru Exp $
+.\"
+.Dd April 7, 2005
+.Dt LROUND 3
+.Os
+.Sh NAME
+.Nm llround ,
+.Nm llroundf ,
+.Nm llroundl ,
+.Nm lround ,
+.Nm lroundf ,
+.Nm lroundl
+.Nd "convert to nearest integral value"
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft "long long"
+.Fn llround "double x"
+.Ft "long long"
+.Fn llroundf "float x"
+.Ft "long long"
+.Fn llroundl "long double x"
+.Ft long
+.Fn lround "double x"
+.Ft long
+.Fn lroundf "float x"
+.Ft long
+.Fn lroundl "long double x"
+.Sh DESCRIPTION
+The
+.Fn lround
+function returns the integer nearest to its argument
+.Fa x ,
+rounding away from zero in halfway cases.
+If the rounded result is too large to be represented as a
+.Vt long
+value, an invalid exception is raised and the return value is undefined.
+Otherwise, if
+.Fa x
+is not an integer,
+.Fn lround
+may raise an inexact exception.
+When the rounded result is representable as a
+.Vt long ,
+the expression
+.Fn lround x
+is equivalent to
+.Po Vt long Pc Ns Fn round x
+(although the former may be more efficient).
+.Pp
+The
+.Fn llround ,
+.Fn llroundf ,
+.Fn llroundl ,
+.Fn lroundf
+and
+.Fn lroundl
+functions differ from
+.Fn lround
+only in their input and output types.
+.Sh SEE ALSO
+.Xr lrint 3 ,
+.Xr math 3 ,
+.Xr rint 3 ,
+.Xr round 3
+.Sh STANDARDS
+The
+.Fn llround ,
+.Fn llroundf ,
+.Fn llroundl ,
+.Fn lround ,
+.Fn lroundf ,
+and
+.Fn lroundl
+functions conform to
+.St -isoC-99 .
+.Sh HISTORY
+The
+.Vt float
+and
+.Vt double
+versions of these routines first appeared in
+.Fx 5.4 .
+The
+.Vt "long double"
+versions appeared in
+.Fx 6.0 .
diff --git a/libm/man/math.3 b/libm/man/math.3
new file mode 100644
index 0000000..828b5e0
--- /dev/null
+++ b/libm/man/math.3
@@ -0,0 +1,242 @@
+.\" Copyright (c) 1985 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)math.3	6.10 (Berkeley) 5/6/91
+.\" $FreeBSD: src/lib/msun/man/math.3,v 1.27 2005/11/17 13:00:00 ru Exp $
+.\"
+.Dd November 6, 2005
+.Dt MATH 3
+.Os
+.if n \{\
+.char \[sr] "sqrt
+.\}
+.Sh NAME
+.Nm math
+.Nd "floating-point mathematical library"
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Sh DESCRIPTION
+These functions constitute the C math library.
+.Sh "LIST OF FUNCTIONS"
+Each of the following
+.Vt double
+functions has a
+.Vt float
+counterpart with an
+.Ql f
+appended to the name and a
+.Vt "long double"
+counterpart with an
+.Ql l
+appended.
+As an example, the
+.Vt float
+and
+.Vt "long double"
+counterparts of
+.Ft double
+.Fn acos "double x"
+are
+.Ft float
+.Fn acosf "float x"
+and
+.Ft "long double"
+.Fn acosl "long double x" ,
+respectively.
+.de Cl
+.Bl -column "isgreaterequal" "bessel function of the second kind of the order 0"
+.Em "Name	Description"
+..
+.Ss Algebraic Functions
+.Cl
+cbrt	cube root
+fma	fused multiply-add
+hypot	Euclidean distance
+sqrt	square root
+.El
+.Ss Classification Functions
+.Cl
+fpclassify	classify a floating-point value
+isfinite	determine whether a value is finite
+isinf	determine whether a value is infinite
+isnan	determine whether a value is \*(Na
+isnormal	determine whether a value is normalized
+.El
+.Ss Exponent Manipulation Functions
+.Cl
+frexp	extract exponent and mantissa
+ilogb	extract exponent
+ldexp	multiply by power of 2
+logb	extract exponent
+scalbln	adjust exponent
+scalbn	adjust exponent
+.El
+.Ss Extremum- and Sign-Related Functions
+.Cl
+copysign	copy sign bit
+fabs	absolute value
+fdim	positive difference
+fmax	maximum function
+fmin	minimum function
+signbit	extract sign bit
+.El
+.\" .Ss Not a Number
+.\" .Cl
+.\" nan	return quiet \*(Na)	0
+.\" .El
+.Ss Residue and Rounding Functions
+.Cl
+ceil	integer no less than
+floor	integer no greater than
+fmod	positive remainder
+llrint	round to integer in fixed-point format
+llround	round to nearest integer in fixed-point format
+lrint	round to integer in fixed-point format
+lround	round to nearest integer in fixed-point format
+modf	extract integer and fractional parts
+nearbyint	round to integer (silent)
+nextafter	next representable value
+nexttoward	next representable value
+remainder	remainder
+remquo	remainder with partial quotient
+rint	round to integer
+round	round to nearest integer
+trunc	integer no greater in magnitude than
+.El
+.Pp
+The
+.Fn ceil ,
+.Fn floor ,
+.Fn llround ,
+.Fn lround ,
+.Fn round ,
+and
+.Fn trunc
+functions round in predetermined directions, whereas
+.Fn llrint ,
+.Fn lrint ,
+and
+.Fn rint
+round according to the current (dynamic) rounding mode.
+For more information on controlling the dynamic rounding mode, see
+.Xr fenv 3
+and
+.Xr fesetround 3 .
+.Ss Silent Order Predicates
+.Cl
+isgreater	greater than relation
+isgreaterequal	greater than or equal to relation
+isless	less than relation
+islessequal	less than or equal to relation
+islessgreater	less than or greater than relation
+isunordered	unordered relation
+.El
+.Ss Transcendental Functions
+.Cl
+acos	inverse cosine
+acosh	inverse hyperbolic cosine
+asin	inverse sine
+asinh	inverse hyperbolic sine
+atan	inverse tangent
+atanh	inverse hyperbolic tangent
+atan2	atan(y/x); complex argument
+cos	cosine
+cosh	hyperbolic cosine
+erf	error function
+erfc	complementary error function
+exp	exponential base e
+exp2	exponential base 2
+expm1	exp(x)\-1
+j0	Bessel function of the first kind of the order 0
+j1	Bessel function of the first kind of the order 1
+jn	Bessel function of the first kind of the order n
+lgamma	log gamma function
+log	natural logarithm
+log10	logarithm to base 10
+log1p	log(1+x)
+.\" log2	base 2 logarithm
+pow	exponential x**y
+sin	trigonometric function
+sinh	hyperbolic function
+tan	trigonometric function
+tanh	hyperbolic function
+tgamma	gamma function
+y0	Bessel function of the second kind of the order 0
+y1	Bessel function of the second kind of the order 1
+yn	Bessel function of the second kind of the order n
+.El
+.Pp
+Unlike the algebraic functions listed earlier, the routines
+in this section may not produce a result that is correctly rounded,
+so reproducible results cannot be guaranteed across platforms.
+For most of these functions, however, incorrect rounding occurs
+rarely, and then only in very-close-to-halfway cases.
+.Sh SEE ALSO
+.Xr fenv 3 ,
+.Xr ieee 3
+.Sh HISTORY
+A math library with many of the present functions appeared in
+.At v7 .
+The library was substantially rewritten for
+.Bx 4.3
+to provide
+better accuracy and speed on machines supporting either VAX
+or IEEE 754 floating-point.
+Most of this library was replaced with FDLIBM, developed at Sun
+Microsystems, in
+.Fx 1.1.5 .
+Additional routines, including ones for
+.Vt float
+and
+.Vt long double
+values, were written for or imported into subsequent versions of FreeBSD.
+.Sh BUGS
+The
+.Fn log2
+and
+.Fn nan
+functions are missing, and many functions are not available in their
+.Vt "long double"
+variants.
+.Pp
+Many of the routines to compute transcendental functions produce
+inaccurate results in other than the default rounding mode.
+.Pp
+On some architectures, trigonometric argument reduction is not
+performed accurately, resulting in errors greater than 1
+.Em ulp
+for large arguments to
+.Fn cos ,
+.Fn sin ,
+and
+.Fn tan .
diff --git a/libm/man/nextafter.3 b/libm/man/nextafter.3
new file mode 100644
index 0000000..1c94fb7
--- /dev/null
+++ b/libm/man/nextafter.3
@@ -0,0 +1,100 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: src/lib/msun/man/nextafter.3,v 1.2 2005/03/07 05:00:29 das Exp $
+.\"
+.Dd May 4, 2005
+.Dt NEXTAFTER 3
+.Os
+.Sh NAME
+.Nm nextafter ,
+.Nm nextafterf ,
+.Nm nextafterl ,
+.Nm nexttoward ,
+.Nm nexttowardf ,
+.Nm nexttowardl
+.Nd next representable value
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn nextafter "double x" "double y"
+.Ft float
+.Fn nextafterf "float x" "float y"
+.Ft long double
+.Fn nextafterl "long double x" "long double y"
+.Ft double
+.Fn nexttoward "double x" "long double y"
+.Ft float
+.Fn nexttowardf "float x" "long double y"
+.Ft long double
+.Fn nexttowardl "long double x" "long double y"
+.Sh DESCRIPTION
+These functions
+return the next machine representable number from
+.Fa x
+in direction
+.Fa y .
+.Sh SEE ALSO
+.Xr ieee 3 ,
+.Xr math 3
+.Sh STANDARDS
+The
+.Fn nextafter ,
+.Fn nextafterf ,
+.Fn nextafterl ,
+.Fn nexttoward ,
+.Fn nexttowardf ,
+and
+.Fn nexttowardl
+routines conform to
+.St -isoC-99 .
+They implement the Nextafter function recommended by
+.St -ieee754 ,
+with the extension that
+.Fn nextafter +0.0, -0.0
+returns
+.Li -0.0 ,
+and
+.Fn nextafter -0.0, +0.0
+returns
+.Li +0.0 .
+.Sh HISTORY
+The
+.Fn nextafter
+function appeared in
+.Bx 4.3 ,
+and
+.Fn nextafterf
+appeared in
+.Fx 2.0 .
diff --git a/libm/man/remainder.3 b/libm/man/remainder.3
new file mode 100644
index 0000000..9b621e3
--- /dev/null
+++ b/libm/man/remainder.3
@@ -0,0 +1,146 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: src/lib/msun/man/remainder.3,v 1.4 2005/11/24 09:25:10 joel Exp $
+.\"
+.Dd March 24, 2005
+.Dt REMAINDER 3
+.Os
+.Sh NAME
+.Nm remainder ,
+.Nm remainderf ,
+.Nm remquo ,
+.Nm remquof
+.Nd minimal residue functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn remainder "double x" "double y"
+.Ft float
+.Fn remainderf "float x" "float y"
+.Ft double
+.Fn remquo "double x" "double y" "int *quo"
+.Ft float
+.Fn remquof "float x" "float y" "int *quo"
+.Sh DESCRIPTION
+.Fn remainder ,
+.Fn remainderf ,
+.Fn remquo ,
+and
+.Fn remquof
+return the remainder
+.Fa r
+:=
+.Fa x
+\-
+.Fa n\(**y
+where
+.Fa n
+is the integer nearest the exact value of
+.Bk -words
+.Fa x Ns / Ns Fa y ;
+.Ek
+moreover if
+.Pf \\*(Ba Fa n
+\-
+.Sm off
+.Fa x No / Fa y No \\*(Ba
+.Sm on
+=
+1/2
+then
+.Fa n
+is even.
+Consequently
+the remainder is computed exactly and
+.Sm off
+.Pf \\*(Ba Fa r No \\*(Ba
+.Sm on
+\*(Le
+.Sm off
+.Pf \\*(Ba Fa y No \\*(Ba/2 .
+.Sm on
+But attempting to take the remainder when
+.Fa y
+is 0 or
+.Fa x
+is \*(Pm\*(If is an invalid operation that produces a \*(Na.
+.Pp
+The
+.Fn remquo
+and
+.Fn remquof
+functions also store the last
+.Va k
+bits of
+.Fa n
+in the location pointed to by
+.Fa quo ,
+provided that
+.Fa n
+exists.
+The number of bits
+.Va k
+is platform-specific, but is guaranteed to be at least 3.
+.Sh SEE ALSO
+.Xr fmod 3 ,
+.Xr ieee 3 ,
+.Xr math 3
+.Sh STANDARDS
+The
+.Fn remainder ,
+.Fn remainderf ,
+.Fn remquo ,
+and
+.Fn remquof
+routines conform to
+.St -isoC-99 .
+The remainder is as defined in
+.St -ieee754 .
+.Sh HISTORY
+The
+.Fn remainder
+and
+.Fn remainderf
+functions appeared in
+.Bx 4.3
+and
+.Fx 2.0 ,
+respectively.
+The
+.Fn remquo
+and
+.Fn remquof
+functions were added in
+.Fx 6.0 .
diff --git a/libm/man/rint.3 b/libm/man/rint.3
new file mode 100644
index 0000000..ee55fea
--- /dev/null
+++ b/libm/man/rint.3
@@ -0,0 +1,103 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)rint.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/rint.3,v 1.11 2005/01/11 23:12:17 das Exp $
+.\"
+.Dd July 5, 2004
+.Dt RINT 3
+.Os
+.Sh NAME
+.Nm nearbyint ,
+.Nm nearbyintf ,
+.Nm rint ,
+.Nm rintf
+.Nd round to integral value in floating-point format
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn nearbyint "double x"
+.Ft float
+.Fn nearbyintf "float x"
+.Ft double
+.Fn rint "double x"
+.Ft float
+.Fn rintf "float x"
+.Sh DESCRIPTION
+The
+.Fn rint
+and the
+.Fn rintf
+functions return the integral value nearest to
+.Fa x
+according to the prevailing rounding mode.
+These functions raise an inexact exception when the original argument
+is not an exact integer.
+.Pp
+The
+.Fn nearbyint
+and
+.Fn nearbyintf
+functions perform the same operation, except that they do not raise
+an inexact exception.
+.Sh SEE ALSO
+.Xr abs 3 ,
+.Xr ceil 3 ,
+.Xr fabs 3 ,
+.Xr fenv 3 ,
+.Xr floor 3 ,
+.Xr ieee 3 ,
+.Xr lrint 3 ,
+.Xr lround 3 ,
+.Xr math 3 ,
+.Xr round 3
+.Sh STANDARDS
+The
+.Fn nearbyint ,
+.Fn nearbyintf ,
+.Fn rint ,
+and
+.Fn rintf
+functions conform to
+.St -isoC-99 .
+.Sh HISTORY
+A
+.Fn rint
+function appeared in
+.At v6 .
+The
+.Fn nearbyint
+and
+.Fn nearbyintf
+functions appeared in
+.Fx 5.3 .
diff --git a/libm/man/round.3 b/libm/man/round.3
new file mode 100644
index 0000000..b077d77
--- /dev/null
+++ b/libm/man/round.3
@@ -0,0 +1,80 @@
+.\" Copyright (c) 2003, Steven G. Kargl
+.\" 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.
+.\"
+.\" 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/round.3,v 1.6 2005/06/15 19:04:04 ru Exp $
+.\"
+.Dd April 7, 2005
+.Dt ROUND 3
+.Os
+.Sh NAME
+.Nm round ,
+.Nm roundf ,
+.Nm roundl
+.Nd round to nearest integral value
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn round "double x"
+.Ft float
+.Fn roundf "float x"
+.Ft "long double"
+.Fn roundl "long double x"
+.Sh DESCRIPTION
+The
+.Fn round ,
+.Fn roundf ,
+and
+.Fn roundl
+functions return the nearest integral value to
+.Fa x ;
+if
+.Fa x
+lies halfway between two integral values, then these
+functions return the integral value with the larger
+absolute value (i.e., they round away from zero).
+.Sh SEE ALSO
+.Xr ceil 3 ,
+.Xr floor 3 ,
+.Xr ieee 3 ,
+.Xr lrint 3 ,
+.Xr lround 3 ,
+.Xr math 3 ,
+.Xr rint 3 ,
+.Xr trunc 3
+.Sh STANDARDS
+These functions conform to
+.St -isoC-99 .
+.Sh HISTORY
+The
+.Fn round
+and
+.Fn roundf
+functions appeared in
+.Fx 5.3 .
+The
+.Fn roundl
+function appeared in
+.Fx 6.0 .
diff --git a/libm/man/scalbn.3 b/libm/man/scalbn.3
new file mode 100644
index 0000000..923caab
--- /dev/null
+++ b/libm/man/scalbn.3
@@ -0,0 +1,95 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: src/lib/msun/man/scalbn.3,v 1.3 2005/11/24 09:25:10 joel Exp $
+.\"
+.Dd March 4, 2005
+.Dt SCALBN 3
+.Os
+.Sh NAME
+.Nm scalbln ,
+.Nm scalblnf ,
+.Nm scalblnl ,
+.Nm scalbn ,
+.Nm scalbnf ,
+.Nm scalbnl
+.Nd adjust exponent
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn scalbln "double x" "long n"
+.Ft float
+.Fn scalblnf "float x" "long n"
+.Ft long double
+.Fn scalblnl "long double x" "long n"
+.Ft double
+.Fn scalbn "double x" "int n"
+.Ft float
+.Fn scalbnf "float x" "int n"
+.Ft long double
+.Fn scalbnl "long double x" "int n"
+.Sh DESCRIPTION
+These routines return
+.Fa x Ns \(**(2** Ns Fa n )
+computed by exponent manipulation.
+.Sh SEE ALSO
+.Xr ieee 3 ,
+.Xr math 3
+.Sh STANDARDS
+These routines conform to
+.St -isoC-99 ,
+and they implement the Scalb function recommended by
+.St -ieee754 .
+.Sh HISTORY
+The
+.Fn scalbn
+and
+.Fn scalbnf
+functions appeared in
+.Bx 4.3
+and
+.Fx 2.0 ,
+respectively.
+The
+.Fn scalbln
+and
+.Fn scalblnf
+functions first appeared in
+.Fx 5.3 ,
+and
+.Fn scalblnl
+and
+.Fn scalbln
+in
+.Fx 6.0 .
diff --git a/libm/man/signbit.3 b/libm/man/signbit.3
new file mode 100644
index 0000000..b749671
--- /dev/null
+++ b/libm/man/signbit.3
@@ -0,0 +1,57 @@
+.\" Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/signbit.3,v 1.1 2004/07/19 08:16:10 das Exp $
+.\"
+.Dd July 18, 2004
+.Dt SIGNBIT 3
+.Os
+.Sh NAME
+.Nm signbit
+.Nd "determine whether a floating-point number's sign is negative"
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft int
+.Fn signbit "real-floating x"
+.Sh DESCRIPTION
+The
+.Fn signbit
+macro takes an argument of
+.Fa x
+and returns non-zero if the value of its sign is negative, otherwise 0.
+.Sh SEE ALSO
+.Xr fpclassify 3 ,
+.Xr math 3
+.Sh STANDARDS
+The
+.Fn signbit
+macro conforms to
+.St -isoC-99 .
+.Sh HISTORY
+The
+.Fn signbit
+macro was added in
+.Fx 5.1 .
diff --git a/libm/man/sin.3 b/libm/man/sin.3
new file mode 100644
index 0000000..3a408a7
--- /dev/null
+++ b/libm/man/sin.3
@@ -0,0 +1,82 @@
+.\" Copyright (c) 1991 The Regents of the University of California.
+.\" All rights reserved.
+.\"
+.\"	@(#)sin.3	6.7 (Berkeley) 4/19/91
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)sin.3	6.7 (Berkeley) 4/19/91
+.\" $FreeBSD: src/lib/msun/man/sin.3,v 1.9 2001/10/13 12:23:23 bde Exp $
+.\"
+.Dd April 19, 1991
+.Dt SIN 3
+.Os
+.Sh NAME
+.Nm sin ,
+.Nm sinf
+.Nd sine functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn sin "double x"
+.Ft float
+.Fn sinf "float x"
+.Sh DESCRIPTION
+The
+.Fn sin
+and the
+.Fn sinf
+functions compute the sine of
+.Fa x
+(measured in radians).
+A large magnitude argument may yield a result with little
+or no significance.
+.Sh RETURN VALUES
+The
+.Fn sin
+and the
+.Fn sinf
+functions return the sine value.
+.Sh SEE ALSO
+.Xr acos 3 ,
+.Xr asin 3 ,
+.Xr atan 3 ,
+.Xr atan2 3 ,
+.Xr cos 3 ,
+.Xr cosh 3 ,
+.Xr math 3 ,
+.Xr sinh 3 ,
+.Xr tan 3 ,
+.Xr tanh 3
+.Sh STANDARDS
+The
+.Fn sin
+function conforms to
+.St -isoC .
diff --git a/libm/man/sinh.3 b/libm/man/sinh.3
new file mode 100644
index 0000000..8347862
--- /dev/null
+++ b/libm/man/sinh.3
@@ -0,0 +1,71 @@
+.\" Copyright (c) 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)sinh.3	6.6 (Berkeley) 4/19/91
+.\" $FreeBSD: src/lib/msun/man/sinh.3,v 1.12 2005/01/14 23:28:28 das Exp $
+.Dd January 14, 2005
+.Dt SINH 3
+.Os
+.Sh NAME
+.Nm sinh ,
+.Nm sinhf
+.Nd hyperbolic sine function
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn sinh "double x"
+.Ft float
+.Fn sinhf "float x"
+.Sh DESCRIPTION
+The
+.Fn sinh
+and the
+.Fn sinhf
+functions compute the hyperbolic sine of
+.Fa x .
+.Sh SEE ALSO
+.Xr acos 3 ,
+.Xr asin 3 ,
+.Xr atan 3 ,
+.Xr atan2 3 ,
+.Xr cos 3 ,
+.Xr cosh 3 ,
+.Xr math 3 ,
+.Xr sin 3 ,
+.Xr tan 3 ,
+.Xr tanh 3
+.Sh STANDARDS
+The
+.Fn sinh
+function conforms to
+.St -isoC .
diff --git a/libm/man/sqrt.3 b/libm/man/sqrt.3
new file mode 100644
index 0000000..22f8b7b
--- /dev/null
+++ b/libm/man/sqrt.3
@@ -0,0 +1,100 @@
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)sqrt.3	6.4 (Berkeley) 5/6/91
+.\" $FreeBSD: src/lib/msun/man/sqrt.3,v 1.12 2005/01/14 23:28:28 das Exp $
+.\"
+.Dd May 6, 1991
+.Dt SQRT 3
+.Os
+.Sh NAME
+.Nm cbrt ,
+.Nm cbrtf ,
+.Nm sqrt ,
+.Nm sqrtf
+.Nd cube root and square root functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn cbrt "double x"
+.Ft float
+.Fn cbrtf "float x"
+.Ft double
+.Fn sqrt "double x"
+.Ft float
+.Fn sqrtf "float x"
+.Sh DESCRIPTION
+The
+.Fn cbrt
+and the
+.Fn cbrtf
+functions compute
+the cube root of
+.Ar x .
+.Pp
+The
+.Fn sqrt
+and the
+.Fn sqrtf
+functions compute the
+non-negative square root of x.
+.Sh RETURN VALUES
+The
+.Fn cbrt
+and the
+.Fn cbrtf
+functions return the requested cube root.
+The
+.Fn sqrt
+and the
+.Fn sqrtf
+functions return the requested square root
+unless an error occurs.
+An attempt to take the
+.Fn sqrt
+of negative
+.Fa x
+raises an invalid exception and causes an \*(Na to be returned.
+.Sh SEE ALSO
+.Xr fenv 3 ,
+.Xr math 3
+.Sh STANDARDS
+The
+.Fn sqrt
+function conforms to
+.St -isoC .
+.Sh HISTORY
+The
+.Fn cbrt
+function appeared in
+.Bx 4.3 .
diff --git a/libm/man/tan.3 b/libm/man/tan.3
new file mode 100644
index 0000000..5995a3b
--- /dev/null
+++ b/libm/man/tan.3
@@ -0,0 +1,81 @@
+.\" Copyright (c) 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)tan.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/tan.3,v 1.9 2001/10/13 12:23:23 bde Exp $
+.\"
+.Dd May 2, 1991
+.Dt TAN 3
+.Os
+.Sh NAME
+.Nm tan ,
+.Nm tanf
+.Nd tangent functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn tan "double x"
+.Ft float
+.Fn tanf "float x"
+.Sh DESCRIPTION
+The
+.Fn tan
+and the
+.Fn tanf
+functions compute the tangent of
+.Fa x
+(measured in radians).
+A large magnitude argument may yield a result
+with little or no significance.
+For a discussion of error due to roundoff, see
+.Xr math 3 .
+.Sh RETURN VALUES
+The
+.Fn tan
+function returns the tangent value.
+.Sh SEE ALSO
+.Xr acos 3 ,
+.Xr asin 3 ,
+.Xr atan 3 ,
+.Xr atan2 3 ,
+.Xr cos 3 ,
+.Xr cosh 3 ,
+.Xr math 3 ,
+.Xr sin 3 ,
+.Xr sinh 3 ,
+.Xr tanh 3
+.Sh STANDARDS
+The
+.Fn tan
+function conforms to
+.St -isoC .
diff --git a/libm/man/tanh.3 b/libm/man/tanh.3
new file mode 100644
index 0000000..391bc15
--- /dev/null
+++ b/libm/man/tanh.3
@@ -0,0 +1,80 @@
+.\" Copyright (c) 1991 The 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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: @(#)tanh.3	5.1 (Berkeley) 5/2/91
+.\" $FreeBSD: src/lib/msun/man/tanh.3,v 1.10 2001/10/13 12:23:23 bde Exp $
+.\"
+.Dd May 2, 1991
+.Dt TANH 3
+.Os
+.Sh NAME
+.Nm tanh ,
+.Nm tanhf
+.Nd hyperbolic tangent functions
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn tanh "double x"
+.Ft float
+.Fn tanhf "float x"
+.Sh DESCRIPTION
+The
+.Fn tanh
+and the
+.Fn tanhf
+functions compute the hyperbolic tangent of
+.Fa x .
+For a discussion of error due to roundoff, see
+.Xr math 3 .
+.Sh RETURN VALUES
+The
+.Fn tanh
+and the
+.Fn tanhf
+functions return the hyperbolic tangent value.
+.Sh SEE ALSO
+.Xr acos 3 ,
+.Xr asin 3 ,
+.Xr atan 3 ,
+.Xr atan2 3 ,
+.Xr cos 3 ,
+.Xr cosh 3 ,
+.Xr math 3 ,
+.Xr sin 3 ,
+.Xr sinh 3 ,
+.Xr tan 3
+.Sh STANDARDS
+The
+.Fn tanh
+function conforms to
+.St -isoC .
diff --git a/libm/man/trunc.3 b/libm/man/trunc.3
new file mode 100644
index 0000000..cb6c26f
--- /dev/null
+++ b/libm/man/trunc.3
@@ -0,0 +1,80 @@
+.\" Copyright (c) 2004, 2005 David Schultz <das@FreeBSD.org>
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" $FreeBSD: src/lib/msun/man/trunc.3,v 1.3 2005/06/15 19:04:04 ru Exp $
+.\"
+.Dd April 16, 2005
+.Dt TRUNC 3
+.Os
+.Sh NAME
+.Nm trunc ,
+.Nm truncf ,
+.Nm truncl
+.Nd nearest integral value with magnitude less than or equal to |x|
+.Sh LIBRARY
+.Lb libm
+.Sh SYNOPSIS
+.In math.h
+.Ft double
+.Fn trunc "double x"
+.Ft float
+.Fn truncf "float x"
+.Ft "long double"
+.Fn truncl "long double x"
+.Sh DESCRIPTION
+The
+.Fn trunc ,
+.Fn truncf ,
+and
+.Fn truncl
+functions return the nearest integral value with magnitude less than
+or equal to
+.Pf | Fa x Ns | .
+They are equivalent to
+.Fn rint ,
+.Fn rintf ,
+and
+.Fn rintl ,
+respectively, in the
+.Dv FE_TOWARDZERO
+rounding mode.
+.Sh SEE ALSO
+.Xr ceil 3 ,
+.Xr fesetround 3 ,
+.Xr floor 3 ,
+.Xr math 3 ,
+.Xr nextafter 3 ,
+.Xr rint 3 ,
+.Xr round 3
+.Sh STANDARDS
+The
+.Fn trunc ,
+.Fn truncf ,
+and
+.Fn truncl
+functions conform to
+.St -isoC-99 .
+.Sh HISTORY
+These routines first appeared in
+.Fx 5.3 .