describe exp2, exp2f and mlink them

2 files changed, 24 insertions, 5 deletions

diff --git a/lib/libm/Makefile b/lib/libm/Makefile
index 7206c08eec4..4e1469b3f8a 100644
--- a/lib/libm/Makefile
+++ b/lib/libm/Makefile
@@ -1,5 +1,5 @@
 #  $NetBSD: Makefile,v 1.28 1995/11/20 22:06:19 jtc Exp $
-#  $OpenBSD: Makefile,v 1.50 2008/07/29 18:38:21 martynas Exp $
+#  $OpenBSD: Makefile,v 1.51 2008/07/29 21:57:13 martynas Exp $
 #
 #  @(#)Makefile 5.1beta 93/09/24 
 # 
@@ -170,7 +170,8 @@ MAN+=	acos.3 acosh.3 asin.3 asinh.3 atan.3 atan2.3 atanh.3 ceil.3 \
 	sin.3 sinh.3 sqrt.3 tan.3 tanh.3 trunc.3
 
 MLINKS+=erf.3 erfc.3
-MLINKS+=exp.3 expm1.3 exp.3 log.3 exp.3 log10.3 exp.3 log1p.3 exp.3 pow.3
+MLINKS+=exp.3 exp2.3 exp.3 expm1.3 exp.3 log.3 exp.3 log10.3 exp.3 log1p.3 \
+	exp.3 pow.3
 MLINKS+=hypot.3 cabs.3
 MLINKS+=ieee.3 copysign.3 ieee.3 drem.3 ieee.3 ilogb.3 ieee.3 nextafter.3 \
 	ieee.3 remainder.3 ieee.3 scalbn.3
@@ -196,6 +197,7 @@ MLINKS+=cosh.3 coshf.3
 MLINKS+=erf.3 erfcf.3
 MLINKS+=erf.3 erff.3
 MLINKS+=exp.3 expf.3
+MLINKS+=exp.3 exp2f.3
 MLINKS+=exp.3 expm1f.3
 MLINKS+=exp.3 log10f.3
 MLINKS+=exp.3 log1pf.3
diff --git a/lib/libm/man/exp.3 b/lib/libm/man/exp.3
index 56860504c1e..24490abd700 100644
--- a/lib/libm/man/exp.3
+++ b/lib/libm/man/exp.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: exp.3,v 1.17 2007/05/31 19:19:35 jmc Exp $
+.\"	$OpenBSD: exp.3,v 1.18 2008/07/29 21:57:13 martynas Exp $
 .\"
 .\" Copyright (c) 1985, 1991 Regents of the University of California.
 .\" All rights reserved.
@@ -29,12 +29,14 @@
 .\"
 .\"     from: @(#)exp.3	6.12 (Berkeley) 7/31/91
 .\"
-.Dd $Mdocdate: May 31 2007 $
+.Dd $Mdocdate: July 29 2008 $
 .Dt EXP 3
 .Os
 .Sh NAME
 .Nm exp ,
 .Nm expf ,
+.Nm exp2 ,
+.Nm exp2f ,
 .Nm expm1 ,
 .Nm expm1f ,
 .Nm log ,
@@ -53,6 +55,10 @@
 .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"
@@ -75,7 +81,9 @@
 .Sh DESCRIPTION
 The
 .Fn exp
-function computes the exponential value of the given argument
+function computes the base
+.Ms e
+exponential value of the given argument
 .Fa x .
 The
 .Fn expf
@@ -83,6 +91,15 @@ function is a single precision version of
 .Fn exp .
 .Pp
 The
+.Fn exp2
+function computes the base 2 exponential of the given argument
+.Fa x .  
+The
+.Fn exp2f  
+function is a single precision version of
+.Fn exp2 .
+.Pp
+The
 .Fn expm1
 function computes the value exp(x)\-1 accurately even for tiny argument
 .Fa x .