Document fma, fmaf, fmal, nexttoward, nexttowardf, nexttowardl.

3 files changed, 80 insertions, 17 deletions

diff --git a/lib/libm/Makefile b/lib/libm/Makefile
index 15fca095884..9cfe9d3f39f 100644
--- a/lib/libm/Makefile
+++ b/lib/libm/Makefile
@@ -1,4 +1,4 @@
-#  $OpenBSD: Makefile,v 1.95 2011/07/20 17:50:43 martynas Exp $
+#  $OpenBSD: Makefile,v 1.96 2011/07/24 19:25:50 martynas Exp $
 #  $NetBSD: Makefile,v 1.28 1995/11/20 22:06:19 jtc Exp $
 #
 #  @(#)Makefile 5.1beta 93/09/24 
@@ -189,7 +189,7 @@ SRCS+=		${LONG_SRCS}
 MAN+=	acos.3 acosh.3 asin.3 asinh.3 atan.3 atan2.3 atanh.3 ceil.3 \
 	copysign.3 cos.3 cosh.3 erf.3 exp.3 \
 	fdim.3 feclearexcept.3 feenableexcept.3 fegetenv.3 \
-	fegetround.3 floor.3 fmax.3 fmod.3 hypot.3 ilogb.3 j0.3 \
+	fegetround.3 floor.3 fma.3 fmax.3 fmod.3 hypot.3 ilogb.3 j0.3 \
 	lgamma.3 logb.3 lrint.3 lround.3 nan.3 nextafter.3 \
 	remainder.3 rint.3 round.3 scalbn.3 sin.3 sinh.3 sqrt.3 \
 	tan.3 tanh.3 trunc.3
@@ -224,6 +224,7 @@ MLINKS+=logb.3 scalb.3
 MLINKS+=logb.3 significand.3
 MLINKS+=lrint.3 llrint.3
 MLINKS+=lround.3 llround.3
+MLINKS+=nextafter.3 nexttoward.3
 MLINKS+=remainder.3 drem.3 remainder.3 remquo.3
 MLINKS+=rint.3 nearbyint.3
 MLINKS+=scalbn.3 scalbln.3
@@ -253,6 +254,7 @@ MLINKS+=exp.3 logf.3
 MLINKS+=exp.3 powf.3
 MLINKS+=fdim.3 fdimf.3
 MLINKS+=floor.3 floorf.3
+MLINKS+=fma.3 fmaf.3
 MLINKS+=fmax.3 fmaxf.3
 MLINKS+=fmax.3 fminf.3
 MLINKS+=fmod.3 fmodf.3
@@ -278,6 +280,7 @@ MLINKS+=lround.3 lroundf.3
 MLINKS+=nan.3 nanf.3
 MLINKS+=nearbyint.3 nearbyintf.3
 MLINKS+=nextafter.3 nextafterf.3
+MLINKS+=nexttoward.3 nexttowardf.3
 MLINKS+=remainder.3 dremf.3
 MLINKS+=remainder.3 remainderf.3
 MLINKS+=remainder.3 remquof.3
@@ -340,6 +343,7 @@ MLINKS+=exp.3 logl.3
 MLINKS+=exp.3 powl.3
 MLINKS+=fdim.3 fdiml.3
 MLINKS+=floor.3 floorl.3
+MLINKS+=fma.3 fmal.3
 MLINKS+=fmax.3 fmaxl.3
 MLINKS+=fmax.3 fminl.3
 MLINKS+=fmod.3 fmodl.3
@@ -357,6 +361,7 @@ MLINKS+=lround.3 lroundl.3
 MLINKS+=nan.3 nanl.3
 MLINKS+=nearbyint.3 nearbyintl.3
 MLINKS+=nextafter.3 nextafterl.3
+MLINKS+=nexttoward.3 nexttowardl.3
 MLINKS+=remainder.3 remainderl.3
 MLINKS+=remainder.3 remquol.3
 MLINKS+=rint.3 rintl.3
diff --git a/lib/libm/man/fma.3 b/lib/libm/man/fma.3
new file mode 100644
index 00000000000..f8238d033a8
--- /dev/null
+++ b/lib/libm/man/fma.3
@@ -0,0 +1,58 @@
+.\"	$OpenBSD: fma.3,v 1.1 2011/07/24 19:25:50 martynas Exp $
+.\"
+.\" Copyright (c) 2011 Martynas Venckus <martynas@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: July 24 2011 $
+.Dt FMA 3
+.Os
+.Sh NAME
+.Nm fma ,
+.Nm fmaf ,
+.Nm fmal
+.Nd floating multiply-add
+.Sh SYNOPSIS
+.Fd #include <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 compute (x * y) + z, rounded as one ternary operation.
+The result is rounded according to the current rounding mode.
+.Sh RETURN VALUES
+The
+.Fn fma ,
+.Fn fmaf
+and
+.Fn fmal
+functions return (x * y) + z, rounded as one ternary operation.
+.Sh SEE ALSO
+.Xr remainder 3 ,
+.Xr fegetround 3
+.Sh STANDARDS
+The
+.Fn fma ,
+.Fn fmaf
+and
+.Fn fmal
+functions conform to
+.St -isoC-99 .
diff --git a/lib/libm/man/nextafter.3 b/lib/libm/man/nextafter.3
index d297269fc50..5efaf720adc 100644
--- a/lib/libm/man/nextafter.3
+++ b/lib/libm/man/nextafter.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: nextafter.3,v 1.5 2011/07/07 01:34:52 martynas Exp $
+.\"	$OpenBSD: nextafter.3,v 1.6 2011/07/24 19:25:50 martynas Exp $
 .\" Copyright (c) 1985, 1991 Regents of the University of California.
 .\" All rights reserved.
 .\"
@@ -28,13 +28,16 @@
 .\"
 .\"     from: @(#)ieee.3	6.4 (Berkeley) 5/6/91
 .\"
-.Dd $Mdocdate: July 7 2011 $
+.Dd $Mdocdate: July 24 2011 $
 .Dt NEXTAFTER 3
 .Os
 .Sh NAME
 .Nm nextafter ,
 .Nm nextafterf ,
-.Nm nextafterl
+.Nm nextafterl ,
+.Nm nexttoward ,
+.Nm nexttowardf ,
+.Nm nexttowardl ,
 .Nd next representable value
 .Sh SYNOPSIS
 .Fd #include <math.h>
@@ -44,9 +47,15 @@
 .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
-.Fn nextafter
-returns the next machine representable number from
+These functions
+return the next machine representable number from
 .Fa x
 in direction
 .Fa y .
@@ -54,17 +63,8 @@ If
 .Fa x
 equals
 .Fa y ,
-.Fn nextafter
-returns
+these functions return
 .Fa y .
-The
-.Fn nextafterf
-function is a single precision version of
-.Fn nextafter .
-The
-.Fn nextafterl
-function is an extended precision version of
-.Fn nextafter .
 .Sh SEE ALSO
 .Xr nearbyint 3
 .Sh STANDARDS