mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-13 08:40:07 +00:00
26dee9c49c
1997-04-05 03:11 Ulrich Drepper <drepper@cygnus.com> * inet/arpa/inet.h: Rewrite. Don't use the ugly BSD way to write headers but instead add comments and parameter names. Don't use BSD specific types in prototypes. * manual/nss.texi: Correct a few typos and errors. * sysdeps/libm-ieee754/s_cbrt.c: Complete rewrite based on better algorithm. * sysdeps/libm-ieee754/s_cbrtf.c: Likewise. * sysdeps/libm-ieee754/s_cbrtl.c: Likewise. * sysdeps/libm-i387/s_cbrt.S: New file. Optimized assembler version with new algorithm. * sysdeps/libm-i387/s_cbrtf.S: New file. * sysdeps/libm-i387/s_cbrtl.S: New file. * sysdeps/libm-i387/s_frexp.S: Optimize even more. * sysdeps/libm-i387/s_frexpf.S: Likewise. * sysdeps/libm-i387/s_frexpl.S: Likewise. 1997-04-04 18:55 Thorsten Kukuk <kukuk@vt.uni-paderborn.de> * nis/Makefile: Remove CFLAGS-*, add publickey to databases. * nis/nis_call.c: Add MASTER_ONLY and HARD_LOOKUP flags, compile DES part only with secure RPC add-on. * nis/nis_names.c (nis_modify): Fix rpc function number. * nis/nis_server.c: Fix typos. * nis/nss_compat/compat-grp.c: Add NIS+ support. * nis/nss_compat/compat-pwd.c: Likewise. * nis/nss_compat/compat-spwd.c: Likewise. * nis/nss_nis/nis-grp.c: Only a return value > 0 from parse_line signals success. * nis/nss_nis/nis-publickey.c: Changes for compiling with/without secure RPC. * nis/nss_nisplus/nisplus-publickey.c: Likewise. * nis/ypclnt.c: Likewise. * nis/nis_intern.h: Likewise. * nis/nss_nisplus/nisplus-alias.c: Correct parser return code. * nis/nss_nisplus/nisplus-ethers.c: Likewise. * nis/nss_nisplus/nisplus-hosts.c: Likewise. * nis/nss_nisplus/nisplus-network.c: Likewise. * nis/nss_nisplus/nisplus-proto.c: Likewise. * nis/nss_nisplus/nisplus-pwd.c: Likewise. * nis/nss_nisplus/nisplus-rpc.c: Likewise. * nis/nss_nisplus/nisplus-service.c: Likewise. * nis/nss_nisplus/nisplus-spwd.c: Likewise. * nis/nss_nisplus/nisplus-grp.c: Rewrite parser for fixing errors and speedup. * nis/nss_nisplus/nisplus-netgrp.c: Likewise. 1997-04-04 17:03 Ulrich Drepper <drepper@cygnus.com> * math/libm-test.c (cbrt_test): Add tests for +-inf and NaN arguments. 1997-04-03 19:24 H.J. Lu <hjl@gnu.ai.mit.edu> * sysdeps/unix/sysv/linux/sigset.h (__sigisemptyset): Fix a typo. 1997-04-03 16:10 Andreas Jaeger <aj@arthur.pfalz.de> * sysdeps/libm-ieee754/s_nanf.c: * sysdeps/libm-ieee754/s_nan.c: * sysdeps/libm-ieee754/s_nanl.c: Include <stdio.h> for declaration of sprintf. 1997-04-03 13:37 Ulrich Drepper <drepper@cygnus.com> * sysdeps/libm-ieee754/s_cexp.c: Fix type: string_alias -> strong_alias. Reported by sun <asun@zoology.washington.edu>. * rpc/auth.h: Removed. * rpc/auth_des.h: Removed. * sunrpc/rpc/auth.h: Moved to ... * sysdeps/generic/rpc/auth.h: ...here. * sunrpc/rpc/auth_des.h: Moved to ... * sysdeps/generic/rpc/auth_des.h: ...here. 1997-04-03 04:28 Ulrich Drepper <drepper@cygnus.com> * sysdeps/libm-i387/s_frexp.S: New file. ix87 optimized version. * sysdeps/libm-i387/s_frexpf.S: New file. * sysdeps/libm-i387/s_frexpl.S: New file. 1997-04-01 10:11 H.J. Lu <hjl@gnu.ai.mit.edu> * sysdeps/unix/sysv/linux/Makefile [$(subdir)=inet] (sysdep_headers): Remove netinet/icmp.h. Describe `inf', `infinity', `nan', `nan(...)' inputs for strtod * sysdeps/i386/memcmp.S: Likewise. * time/antarctica: Likewise. * time/australasia: Likewise.
75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/* Compute cubic root of double value.
|
|
Copyright (C) 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Dirk Alboth <dirka@uni-paderborn.de> and
|
|
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 "math.h"
|
|
#include "math_private.h"
|
|
|
|
|
|
#define CBRT2 1.2599210498948731648 /* 2^(1/3) */
|
|
#define SQR_CBRT2 1.5874010519681994748 /* 2^(2/3) */
|
|
|
|
static const double factor[5] =
|
|
{
|
|
1.0 / SQR_CBRT2,
|
|
1.0 / CBRT2,
|
|
1.0,
|
|
CBRT2,
|
|
SQR_CBRT2
|
|
};
|
|
|
|
|
|
double
|
|
__cbrt (double x)
|
|
{
|
|
double xm, ym, u, t2;
|
|
int xe;
|
|
|
|
/* Reduce X. XM now is an range 1.0 to 0.5. */
|
|
xm = __frexp (fabs (x), &xe);
|
|
|
|
/* If X is not finite or is null return it (with raising exceptions
|
|
if necessary. */
|
|
if (xe == 0)
|
|
return x + x;
|
|
|
|
u = (0.354895765043919860
|
|
+ ((1.50819193781584896
|
|
+ ((-2.11499494167371287
|
|
+ ((2.44693122563534430
|
|
+ ((-1.83469277483613086
|
|
+ (0.784932344976639262 - 0.145263899385486377 * xm) * xm)
|
|
* xm))
|
|
* xm))
|
|
* xm))
|
|
* xm));
|
|
|
|
t2 = u * u * u;
|
|
|
|
ym = u * (t2 + 2.0 * xm) / (2.0 * t2 + xm) * factor[2 + xe % 3];
|
|
|
|
return __ldexp (x > 0.0 ? ym : -ym, xe / 3);
|
|
}
|
|
weak_alias (__cbrt, cbrt)
|
|
#ifdef NO_LONG_DOUBLE
|
|
strong_alias (__cbrt, __cbrtl)
|
|
weak_alias (__cbrt, cbrtl)
|
|
#endif
|