diff options
Diffstat (limited to 'lib/msun/man')
| -rw-r--r-- | lib/msun/man/log.3 | 18 | ||||
| -rw-r--r-- | lib/msun/man/math.3 | 21 |
2 files changed, 27 insertions, 12 deletions
diff --git a/lib/msun/man/log.3 b/lib/msun/man/log.3 index 1934473..b9fd83c 100644 --- a/lib/msun/man/log.3 +++ b/lib/msun/man/log.3 @@ -1,4 +1,4 @@ -.\" Copyright (c) 2008 David Schultz <das@FreeBSD.org> +.\" Copyright (c) 2008-2010 David Schultz <das@FreeBSD.org> .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd January 17, 2008 +.Dd December 5, 2010 .Dt LOG 3 .Os .Sh NAME @@ -33,6 +33,8 @@ .Nm logl , .Nm log10 , .Nm log10f , +.Nm log2 , +.Nm log2f , .Nm log1p , .Nm log1pf .Nd logarithm functions @@ -49,6 +51,10 @@ .Ft float .Fn log10f "float x" .Ft double +.Fn log2 "double x" +.Ft float +.Fn log2f "float x" +.Ft double .Fn log1p "double x" .Ft float .Fn log1pf "float x" @@ -65,6 +71,12 @@ The and .Fn log10f functions compute the logarithm base 10 of +.Fa x , +while +.Fn log2 +and +.Fn log2f +compute the logarithm base 2 of .Fa x . .Pp The @@ -97,6 +109,8 @@ The .Fn logf , .Fn log10 , .Fn log10f , +.Fn log2 , +.Fn log2f , .Fn log1p , and .Fn log1pf diff --git a/lib/msun/man/math.3 b/lib/msun/man/math.3 index 4690a9a..39aa8ab 100644 --- a/lib/msun/man/math.3 +++ b/lib/msun/man/math.3 @@ -28,7 +28,7 @@ .\" from: @(#)math.3 6.10 (Berkeley) 5/6/91 .\" $FreeBSD$ .\" -.Dd December 16, 2007 +.Dd December 5, 2010 .Dt MATH 3 .Os .Sh NAME @@ -182,7 +182,7 @@ lgamma log gamma function log natural logarithm log10 logarithm to base 10 log1p log(1+x) -.\" log2 base 2 logarithm +log2 base 2 logarithm pow exponential x**y sin trigonometric function sinh hyperbolic function @@ -194,8 +194,8 @@ 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, +The routines +in this section might 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. @@ -221,18 +221,19 @@ and values, were written for or imported into subsequent versions of FreeBSD. .Sh BUGS The -.Fn log2 -function is missing, and many functions are not available in their +.Fn cbrt +function and many of the transcendental 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 +On the i386 platform, trigonometric argument reduction is not +performed accurately for huge arguments, resulting in +large errors +for such arguments to .Fn cos , .Fn sin , and |
