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| author | kargl <kargl@FreeBSD.org> | 2011-03-12 16:50:39 +0000 |
|---|---|---|
| committer | kargl <kargl@FreeBSD.org> | 2011-03-12 16:50:39 +0000 |
| commit | c519d48b44c3e020735f0ea6ba8990884471b5b2 (patch) | |
| tree | eae7ea576c279208da253a26e583fbc1bb847849 /lib/msun/man | |
| parent | 5d37412b23a8bef61f5bd22635be9554076ef5ed (diff) | |
| download | FreeBSD-src-c519d48b44c3e020735f0ea6ba8990884471b5b2.zip FreeBSD-src-c519d48b44c3e020735f0ea6ba8990884471b5b2.tar.gz | |
Implement the long double version for the cube root function, cbrtl.
The algorithm uses Newton's iterations with a crude estimate of the
cube root to converge to a result.
Reviewed by: bde
Approved by: das
Diffstat (limited to 'lib/msun/man')
| -rw-r--r-- | lib/msun/man/math.3 | 9 | ||||
| -rw-r--r-- | lib/msun/man/sqrt.3 | 27 |
2 files changed, 23 insertions, 13 deletions
diff --git a/lib/msun/man/math.3 b/lib/msun/man/math.3 index 39aa8ab..9ffe080 100644 --- a/lib/msun/man/math.3 +++ b/lib/msun/man/math.3 @@ -220,12 +220,11 @@ and .Vt long double values, were written for or imported into subsequent versions of FreeBSD. .Sh BUGS -The -.Fn cbrt -function and many of the transcendental functions -are not available in their +Some of the .Vt "long double" -variants. +math functions in +.St -isoC-99 +are not available. .Pp Many of the routines to compute transcendental functions produce inaccurate results in other than the default rounding mode. diff --git a/lib/msun/man/sqrt.3 b/lib/msun/man/sqrt.3 index 71460fa..e48f98b 100644 --- a/lib/msun/man/sqrt.3 +++ b/lib/msun/man/sqrt.3 @@ -28,12 +28,13 @@ .\" from: @(#)sqrt.3 6.4 (Berkeley) 5/6/91 .\" $FreeBSD$ .\" -.Dd March 1, 2008 +.Dd March 5, 2011 .Dt SQRT 3 .Os .Sh NAME .Nm cbrt , .Nm cbrtf , +.Nm cbrtl , .Nm sqrt , .Nm sqrtf , .Nm sqrtl @@ -46,6 +47,8 @@ .Fn cbrt "double x" .Ft float .Fn cbrtf "float x" +.Ft long double +.Fn cbrtl "long double x" .Ft double .Fn sqrt "double x" .Ft float @@ -54,9 +57,10 @@ .Fn sqrtl "long double x" .Sh DESCRIPTION The -.Fn cbrt -and the -.Fn cbrtf +.Fn cbrt , +.Fn cbrtf , +and +.Fn cbrtl functions compute the cube root of .Ar x . @@ -67,12 +71,14 @@ The and .Fn sqrtl functions compute the -non-negative square root of x. +non-negative square root of +.Ar x . .Sh RETURN VALUES The -.Fn cbrt -and the -.Fn cbrtf +.Fn cbrt , +.Fn cbrtf , +and +.Fn cbrtl functions return the requested cube root. The .Fn sqrt , @@ -94,6 +100,7 @@ raises an invalid exception and causes an \*(Na to be returned The .Fn cbrt , .Fn cbrtf , +.Fn cbrtl , .Fn sqrt , .Fn sqrtf , and @@ -109,3 +116,7 @@ The .Fn sqrtl function appeared in .Fx 8.0 . +The +.Fn cbrtl +function appeared in +.Fx 9.0 . |
