MFC r326748:

Document the existence and precision of the remaining long double
functions for which an imprecise stub implementation was added in
r255294, namely powl(3) and tgammal(3).

Submitted by:	Steve Kargl

MFC r326753:

Correct r326748, indicating that tgammal(3) is mapped to tgamma(3), not
to itself.

Noticed by:	jilles

2 files changed, 29 insertions, 6 deletions

diff --git a/lib/msun/man/exp.3 b/lib/msun/man/exp.3
index f15c498..35bdf26d 100644
--- a/lib/msun/man/exp.3
+++ b/lib/msun/man/exp.3
@@ -28,7 +28,7 @@
 .\"     from: @(#)exp.3	6.12 (Berkeley) 7/31/91
 .\" $FreeBSD$
 .\"
-.Dd November 9, 2015
+.Dd December 8, 2017
 .Dt EXP 3
 .Os
 .Sh NAME
@@ -180,6 +180,15 @@ If 0**0 = 1, then
 then \*(Na**0 = 1 too because x**0 = 1 for all finite
 and infinite x, i.e., independently of x.
 .El
+.Sh BUGS
+To conform with newer C/C++ standards, a stub implementation for
+.Nm powl
+was committed to the math library, where
+.Nm powl
+is mapped to
+.Nm pow .
+Thus, the numerical accuracy is at most that of the 53-bit double
+precision implementation.
 .Sh SEE ALSO
 .Xr fenv 3 ,
 .Xr ldexp 3 ,
diff --git a/lib/msun/man/lgamma.3 b/lib/msun/man/lgamma.3
index c8a22a2..34c5451 100644
--- a/lib/msun/man/lgamma.3
+++ b/lib/msun/man/lgamma.3
@@ -28,7 +28,7 @@
 .\"     from: @(#)lgamma.3	6.6 (Berkeley) 12/3/92
 .\" $FreeBSD$
 .\"
-.Dd September 12, 2014
+.Dd December 8, 2017
 .Dt LGAMMA 3
 .Os
 .Sh NAME
@@ -43,7 +43,8 @@
 .Nm gammaf ,
 .Nm gammaf_r ,
 .Nm tgamma ,
-.Nm tgammaf
+.Nm tgammaf ,
+.Nm tgammal ,
 .Nd log gamma functions, gamma function
 .Sh LIBRARY
 .Lb libm
@@ -76,6 +77,8 @@
 .Fn tgamma "double x"
 .Ft float
 .Fn tgammaf "float x"
+.Ft "long double"
+.Fn tgammal "long double x"
 .Sh DESCRIPTION
 .Fn lgamma x ,
 .Fn lgammaf x ,
@@ -106,9 +109,10 @@ and
 but the caller must provide an integer to store the sign of \(*G(x).
 .Pp
 The
-.Fn tgamma x
+.Fn tgamma x ,
+.Fn tgammaf x ,
 and
-.Fn tgammaf x
+.Fn tgammal x
 functions return \(*G(x), with no effect on
 .Fa signgam .
 .Pp
@@ -166,6 +170,15 @@ non-positive integers.
 For large non-integer negative values,
 .Fn tgamma
 will underflow.
+.Sh BUGS
+To conform with newer C/C++ standards, a stub implementation for
+.Nm tgammal
+was committed to the math library, where
+.Nm tgammal
+is mapped to
+.Nm tgamma .
+Thus, the numerical accuracy is at most that of the 53-bit double
+precision implementation.
 .Sh SEE ALSO
 .Xr math 3
 .Sh STANDARDS
@@ -174,8 +187,9 @@ The
 .Fn lgammaf ,
 .Fn lgammal ,
 .Fn tgamma ,
+.Fn tgammaf ,
 and
-.Fn tgammaf
+.Fn tgammal
 functions are expected to conform to
 .St -isoC-99 .
 .Sh HISTORY