glibc/sysdeps/libm-ieee754/s_catanhl.c
Ulrich Drepper 0a61487785 Update.
1998-02-17 15:10  Ulrich Drepper  <drepper@cygnus.com>

	* elf/dl-load.c (open_path): Use __xstat instead of stat.

	* localedata/tst-locale.sh: Comment out first test for now.

1998-02-14 14:58  H.J. Lu  <hjl@gnu.org>

	* sysdeps/generic/_G_config.h (_G_HAVE_IO_GETLINE_INFO): Defined
	as 1.
	* sysdeps/unix/sysv/linux/_G_config.h (_G_HAVE_IO_GETLINE_INFO):
	Likewise.

	* libio/iogetline.c (_IO_getline_info): Renamed from
	_IO_getline.
	(_IO_getline): Just call _IO_getline_info.

	* libio/libioP.h (_IO_getline_info): New declaration.

	* libc.map (_IO_getline_info, __write): Added.

1998-02-17  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sunrpc/rpc_cout.c (inline_struct): Change typo of plus to
	const char* to shut up gcc.

1998-02-17 11:37  Ulrich Drepper  <drepper@cygnus.com>

	* eld/dl-open.c (_dl_open): Assign correct value to new->l_global.
	Patch forwarded by Cristian Gafton <gafton@redhat.com>.

	* math/math.h: Define M_* constants always as `double' and add new
	macros M_*l which are of type `long double'.
	* sysdeps/libm-ieee754/s_cacoshl.c: Use M_*l constants now.
	* sysdeps/libm-ieee754/s_cacosl.c: Likewise.
	* sysdeps/libm-ieee754/s_casinhl.c: Likewise.
	* sysdeps/libm-ieee754/s_catanhl.c: Likewise.
	* sysdeps/libm-ieee754/s_catanl.c: Likewise.
	* sysdeps/libm-ieee754/s_clog10l.c: Likewise.
	* sysdeps/libm-ieee754/s_clogl.c: Likewise.
	* math/libm-tst.c: Likewise.

	* sysdeps/i386/fpu/bits/mathinline.h (__M_SQRT2): Don't use _Mdbl,
	define as long double unconditionally.

1998-02-17  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* manual/arith.texi (Old-style number conversion): Correct some
	typos.

1998-02-16 16:28  H.J. Lu  <hjl@gnu.org>

	* time/Makefile (tz-cflags, CFLAGS-tzfile.c, CFLAGS-tzset.c):
	Restore.

	* timezone/Makefile (CFLAGS-tzfile.c, CFLAGS-tzset.c): Deleted.
1998-02-17 15:15:51 +00:00

81 lines
2.2 KiB
C

/* Return arc hyperbole tangent for long double value.
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <complex.h>
#include <math.h>
#include "math_private.h"
__complex__ long double
__catanhl (__complex__ long double x)
{
__complex__ long double res;
int rcls = fpclassify (__real__ x);
int icls = fpclassify (__imag__ x);
if (rcls <= FP_INFINITE || icls <= FP_INFINITE)
{
if (icls == FP_INFINITE)
{
__real__ res = __copysignl (0.0, __real__ x);
__imag__ res = __copysignl (M_PI_2l, __imag__ x);
}
else if (rcls == FP_INFINITE || rcls == FP_ZERO)
{
__real__ res = __copysignl (0.0, __real__ x);
if (icls >= FP_ZERO)
__imag__ res = __copysignl (M_PI_2l, __imag__ x);
else
__imag__ res = __nanl ("");
}
else
{
__real__ res = __nanl ("");
__imag__ res = __nanl ("");
}
}
else if (rcls == FP_ZERO && icls == FP_ZERO)
{
res = x;
}
else
{
long double i2, num, den;
i2 = __imag__ x * __imag__ x;
num = 1.0 + __real__ x;
num = i2 + num * num;
den = 1.0 - __real__ x;
den = i2 + den * den;
__real__ res = 0.25 * (__ieee754_logl (num) - __ieee754_logl (den));
den = 1 - __real__ x * __real__ x - i2;
__imag__ res = 0.5 * __ieee754_atan2l (2.0 * __imag__ x, den);
}
return res;
}
weak_alias (__catanhl, catanhl)