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diff --git a/lib/msun/man/ieee.3 b/lib/msun/man/ieee.3 new file mode 100644 index 0000000..e8b1583 --- /dev/null +++ b/lib/msun/man/ieee.3 @@ -0,0 +1,152 @@ +.\" 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 +.\" $Id: ieee.3,v 1.7 1994/03/10 18:15:07 jtc Exp $ +.\" +.Dd Feb 25, 1994 +.Dt IEEE 3 +.Os +.Sh NAME +.Nm copysign , +.Nm finite , +.Nm ilogb , +.Nm nextafter , +.Nm remainder , +.Nm scalbn +.Nd Functions for IEEE arithmetic +.Sh SYNOPSIS +.Fd #include <math.h> +.Ft double +.Fn copysign "double x" "double y" +.Ft int +.Fn finite "double x" +.Ft int +.Fn ilogb "double x" +.Ft double +.Fn nextafter "double x" "double y" +.Ft double +.Fn remainder "double x" "double y" +.Ft double +.Fn scalbn "double x" "int n" +.Sh DESCRIPTION +These functions are required or recommended by +.St -ieee754 . +.Pp +.Fn copysign +returns +.Fa x +with its sign changed to +.Fa y Ns 's. +.Pp +.Fn finite +returns the value 1 just when +\-\*(If \*(Lt +.Fa x +\*(Lt +\*(If; +otherwise a +zero is returned +(when +.Pf \\*(Ba Ns Fa x Ns \\*(Ba += \*(If or +.Fa x +is \*(Na +.Pp +.Fn ilogb +returns +.Fa x Ns 's exponent +.Fa n , +in integer format. +.Fn ilogb \*(Pm\*(If +returns +.Dv INT_MAX +and +.Fn ilogb 0 +returns +.Dv INT_MIN . +.Pp +.Fn nextafter +returns the next machine representable number from +.Fa x +in direction +.Fa y . +.Pp +.Fn remainder +returns 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 +.Fn remainder x 0 +and +.Fn remainder \*(If 0 +are invalid operations that produce a \*(Na. +.Pp +.Fn scalbn +returns +.Fa x Ns \(**(2** Ns Fa n ) +computed by exponent manipulation. +.Sh SEE ALSO +.Xr math 3 +.Sh HISTORY +The +.Nm ieee +functions appeared in +.Bx 4.3 . +.Sh STANDARDS +.St -ieee754 |