Upgrade libm.

This brings us up to date with FreeBSD HEAD, fixes various bugs, unifies
the set of functions we support on ARM, MIPS, and x86, fixes "long double",
adds ISO C99 support, and adds basic unit tests.

It turns out that our "long double" functions have always been broken
for non-normal numbers. This patch fixes that by not using the upstream
implementations and just forwarding to the regular "double" implementation
instead (since "long double" on Android is just "double" anyway, which is
what BSD doesn't support).

All the tests pass on ARM, MIPS, and x86, plus glibc on x86-64.

Bug: 3169850
Bug: 8012787
Bug: https://code.google.com/p/android/issues/detail?id=6697
Change-Id: If0c343030959c24bfc50d4d21c9530052c581837

1 files changed, 0 insertions, 185 deletions

diff --git a/libm/man/lgamma.3 b/libm/man/lgamma.3
deleted file mode 100644
index 0064a48c2..000000000
--- a/libm/man/lgamma.3
+++ /dev/null
@@ -1,185 +0,0 @@
-.\" Copyright (c) 1985, 1991 Regents of the University of California.
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     from: @(#)lgamma.3	6.6 (Berkeley) 12/3/92
-.\" $FreeBSD: src/lib/msun/man/lgamma.3,v 1.22 2005/01/16 16:46:14 ru Exp $
-.\"
-.Dd January 14, 2005
-.Dt LGAMMA 3
-.Os
-.Sh NAME
-.Nm lgamma ,
-.Nm lgamma_r ,
-.Nm lgammaf ,
-.Nm lgammaf_r ,
-.Nm gamma ,
-.Nm gamma_r ,
-.Nm gammaf ,
-.Nm gammaf_r ,
-.Nm tgamma
-.Nd log gamma functions, gamma function
-.Sh LIBRARY
-.Lb libm
-.Sh SYNOPSIS
-.In math.h
-.Ft extern int
-.Fa signgam ;
-.sp
-.Ft double
-.Fn lgamma "double x"
-.Ft double
-.Fn lgamma_r "double x" "int *signgamp"
-.Ft float
-.Fn lgammaf "float x"
-.Ft float
-.Fn lgammaf_r "float x" "int *signgamp"
-.Ft double
-.Fn gamma "double x"
-.Ft double
-.Fn gamma_r "double x" "int *signgamp"
-.Ft float
-.Fn gammaf "float x"
-.Ft float
-.Fn gammaf_r "float x" "int *signgamp"
-.Ft double
-.Fn tgamma "double x"
-.Sh DESCRIPTION
-.Fn lgamma x
-and
-.Fn lgammaf x
-.if t \{\
-return ln\||\(*G(x)| where
-.Bd -unfilled -offset indent
-\(*G(x) = \(is\d\s8\z0\s10\u\u\s8\(if\s10\d t\u\s8x\-1\s10\d e\u\s8\-t\s10\d dt	for x > 0 and
-\(*G(x) = \(*p/(\(*G(1\-x)\|sin(\(*px))	for x < 1.
-.Ed
-.\}
-.if n \
-return ln\||\(*G(x)|.
-.Pp
-The external integer
-.Fa signgam
-returns the sign of \(*G(x).
-.Pp
-.Fn lgamma_r x signgamp
-and
-.Fn lgammaf_r x signgamp
-provide the same functionality as
-.Fn lgamma x
-and
-.Fn lgammaf x
-but the caller must provide an integer to store the sign of \(*G(x).
-.Pp
-.Fn gamma ,
-.Fn gammaf ,
-.Fn gamma_r ,
-and
-.Fn gammaf_r
-are deprecated aliases for
-.Fn lgamma ,
-.Fn lgammaf ,
-.Fn lgamma_r ,
-and
-.Fn lgammaf_r ,
-respectively.
-.Fn tgamma x
-returns \(*G(x), with no effect on
-.Fa signgam .
-.Sh IDIOSYNCRASIES
-Do not use the expression
-.Dq Li signgam\(**exp(lgamma(x))
-to compute g := \(*G(x).
-Instead use a program like this (in C):
-.Bd -literal -offset indent
-lg = lgamma(x); g = signgam\(**exp(lg);
-.Ed
-.Pp
-Only after
-.Fn lgamma
-or
-.Fn lgammaf
-has returned can signgam be correct.
-.Pp
-For arguments in its range,
-.Fn tgamma
-is preferred, as for positive arguments
-it is accurate to within one unit in the last place.
-Exponentiation of
-.Fn lgamma
-will lose up to 10 significant bits.
-.Sh RETURN VALUES
-.Fn gamma ,
-.Fn gamma_r ,
-.Fn gammaf ,
-.Fn gammaf_r ,
-.Fn lgamma ,
-.Fn lgamma_r ,
-.Fn lgammaf ,
-and
-.Fn lgammaf_r
-return appropriate values unless an argument is out of range.
-Overflow will occur for sufficiently large positive values, and
-non-positive integers.
-For large non-integer negative values,
-.Fn tgamma
-will underflow.
-.Sh SEE ALSO
-.Xr math 3
-.Sh STANDARDS
-The
-.Fn lgamma
-and
-.Fn tgamma
-functions are expected to conform to
-.St -isoC-99 .
-.Sh HISTORY
-The
-.Fn lgamma
-function appeared in
-.Bx 4.3 .
-The
-.Fn gamma
-function appeared in
-.Bx 4.4
-as a function which computed \(*G(x).
-This version was used in
-.Fx 1.1 .
-The name
-.Fn gamma
-was originally dedicated to the
-.Fn lgamma
-function,
-and that usage was restored by switching to Sun's fdlibm in
-.Fx 1.1.5 .
-The
-.Fn tgamma
-function appeared in
-.Fx 5.0 .