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

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

mdoc: remove empty line

mdoc: remove EOL whitespace.

* Makefile:
. Hook e_lgammal[_r].c to the build.
. Create man page links for lgammal[-r].3.

* Symbol.map:
. Sort lgammal to its rightful place.
. Add FBSD_1.4 section for the new lgamal_r symbol.

* ld128/e_lgammal_r.c:
. 128-bit implementataion of lgammal_r().

* ld80/e_lgammal_r.c:
. Intel 80-bit format implementation of lgammal_r().

* src/e_lgamma.c:
. Expose lgammal as a weak reference to lgamma for platforms
where long double is mapped to double.

* src/e_lgamma_r.c:
. Use integer literal constants instead of real literal constants.
Let compiler(s) do the job of conversion to the appropriate type.
. Expose lgammal_r as a weak reference to lgamma_r for platforms
where long double is mapped to double.

* src/e_lgammaf_r.c:
. Fixed the Cygnus Support conversion of e_lgamma_r.c to float.
This includes the generation of new polynomial and rational
approximations with fewer terms. For each approximation, include
a comment on an estimate of the accuracy over the relevant domain.
. Use integer literal constants instead of real literal constants.
Let compiler(s) do the job of conversion to the appropriate type.
This allows the removal of several explicit casts of double values
to float.

* src/e_lgammal.c:
. Wrapper for lgammal() about lgammal_r().

* src/imprecise.c:
. Remove the lgamma.

* src/math.h:
. Add a prototype for lgammal_r().

* man/lgamma.3:
. Document the new functions.

Reviewed by: bde

Add tgammaf() as a simple wrapper around tgamma().

Remove California Regent's clause 3, per letter

Removed redundant .br call.

Remove numerous references to VAX floating-point and the setting of
errno, replacing them with a discussion of IEEE exceptions where
appropriate. Cross-reference fenv(3) whenever exceptions are
mentioned.

mdoc(7) police: Nits.

- gamma_r, lgamma_r, gammaf_r, and lgammaf_r were protected by _REENTRANT
in math.h; the consensus here was that __BSD_VISIBLE was correct instead.

- gamma_r, lgamma_r, gammaf_r, and lgammaf_r had no documentation in the
lgamma(3) manpage.

Reviewed by: standards@
Submitted by: Ben Mesander

Resurrect Lite1's gamma() as C99's tgamma(). Minimal changes.

Fixed some bugs in the description of plain gamma() (and gammaf()).
Give a more detailed and correct history of when gamma() was actually
the gamma function.

mdoc(7) police: fixed bugs from rev. 1.15.

gamma(x) actually returns \log(|\Gamma(x)|), so correct the man
page and add an historical note explaining this. This patch is
based on Stephen's.

We still need someone to implement tgamma.

PR: 28972, 31764
Submitted by: Stephen Montgomery-Smith <stephen@math.missouri.edu>

Use ".Lb libm" where it will have an effect (not just in the zombie man
pages in libm).

Submitted by: phantom

mdoc(7) police: Use the new .In macro for #include statements.

Remove whitespace at EOL.

mdoc(7) police: removed HISTORY info from the .Os call.

mdoc(7) police: split punctuation characters + misc fixes.

mdoc(7) police: Er macro usage cleanup.

mdoc(7) police: Nm -> Fn where appropriate.

$Id$ -> $FreeBSD$

Fixed minor bugs related to the addition of gammaf.

The major bug, that gamma is documented as really being gamma, is
still unfixed.

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Fixed some minor formatting problems to silence manck some more.
Corrected some bogus cross references to man pages that we don't/won't
have and either deleted them, or found a more appropriate man page
that we do have. Various other minor changes to silence manck.

Manck is currently down to about 200 lines of errors, down from
the 500 - 600+ when I started all this.

Additions from Thomas Graichen to mention each functions' floating point
counterpart.
Submitted by: Thomas Graichen <graichen@sirius.physik.fu-berlin.de>

This commit was generated by cvs2svn to compensate for changes in r2116,
which included commits to RCS files with non-trunk default branches.

J.T. Conklin's latest version of the Sun math library.

-- Begin comments from J.T. Conklin:
The most significant improvement is the addition of "float" versions
of the math functions that take float arguments, return floats, and do
all operations in floating point. This doesn't help (performance)
much on the i386, but they are still nice to have.

The float versions were orginally done by Cygnus' Ian Taylor when
fdlibm was integrated into the libm we support for embedded systems.
I gave Ian a copy of my libm as a starting point since I had already
fixed a lot of bugs & problems in Sun's original code. After he was
done, I cleaned it up a bit and integrated the changes back into my
libm.
-- End comments

Reviewed by: jkh
Submitted by: jtc