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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/src | |
| 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/src')
| -rw-r--r-- | lib/msun/src/math.h | 2 | ||||
| -rw-r--r-- | lib/msun/src/s_cbrt.c | 4 |
2 files changed, 4 insertions, 2 deletions
diff --git a/lib/msun/src/math.h b/lib/msun/src/math.h index 9aa2484..8ad13ed 100644 --- a/lib/msun/src/math.h +++ b/lib/msun/src/math.h @@ -411,9 +411,7 @@ long double atan2l(long double, long double); long double atanhl(long double); #endif long double atanl(long double); -#if 0 long double cbrtl(long double); -#endif long double ceill(long double); long double copysignl(long double, long double) __pure2; #if 0 diff --git a/lib/msun/src/s_cbrt.c b/lib/msun/src/s_cbrt.c index 27ecd97..910f75b 100644 --- a/lib/msun/src/s_cbrt.c +++ b/lib/msun/src/s_cbrt.c @@ -111,3 +111,7 @@ cbrt(double x) return(t); } + +#if (LDBL_MANT_DIG == 53) +__weak_reference(cbrt, cbrtl); +#endif |
