Update.cvs/libc-ud-970404cvs/libc-970412cvs/libc-970411cvs/libc-970410cvs/libc-970409cvs/libc-970408cvs/libc-970407cvs/libc-970406cvs/libc-970405

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.

1 files changed, 65 insertions, 111 deletions

diff --git a/sysdeps/libm-ieee754/s_cbrtl.c b/sysdeps/libm-ieee754/s_cbrtl.c
index 21e7727728..b3a53a39e1 100644
--- a/sysdeps/libm-ieee754/s_cbrtl.c
+++ b/sysdeps/libm-ieee754/s_cbrtl.c
@@ -1,122 +1,76 @@
-/* s_cbrtl.c -- long double version of s_cbrt.c.
- * Conversion to long double by Ulrich Drepper,
- * Cygnus Support, drepper@cygnus.com.
- */
-
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: $";
-#endif
+/* 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"
 
-/* cbrtl(x)
- * Return cube root of x
- */
-#ifdef __STDC__
-static const u_int32_t
-#else
-static u_int32_t
-#endif
-	B1_EXP = 10921,		/* = Int(B1) */
-	B1_MANT = 0x7bc4b064,	/* = Int(1.0-0.03306235651)*2**31 */
-
-	B2_EXP = 10900,
-	B2_MANT = 0x7bc4b064;	/* = Int(1.0-0.03306235651)*2**31 */
 
-#ifdef __STDC__
-static const long double
-#else
-static long double
-#endif
-C =  5.42857142857142815906e-01L, /* 19/35 */
-D = -7.05306122448979611050e-01L, /* -864/1225 */
-E =  1.41428571428571436819e+00L, /* 99/70 */
-F =  1.60714285714285720630e+00L, /* 45/28 */
-G =  3.57142857142857150787e-01L; /* 5/14 */
+#define CBRT2 1.2599210498948731648		/* 2^(1/3) */
+#define SQR_CBRT2 1.5874010519681994748		/* 2^(2/3) */
 
-#ifdef __STDC__
-	long double __cbrtl(long double x)
-#else
-	long double __cbrtl(x)
-	long double x;
-#endif
+/* We don't use long double values here since U need not be computed
+   with full precision.  */
+static const double factor[5] =
 {
-	long double r,s,t=0.0,w;
-	u_int32_t sign, se, x0, x1;
-
-	GET_LDOUBLE_WORDS(se,x0,x1,x);
-	sign=se&0x8000; 		/* sign= sign(x) */
-	se ^= sign;
-	if(se==0x7fff) return(x+x); /* cbrt(NaN,INF) is itself */
-	if((se|x0|x1)==0)
-	    return(x);		/* cbrt(0) is itself */
-
-	SET_LDOUBLE_EXP(x,se);	/* x <- |x| */
-
-/* XXX I don't know whether the numbers for correct are correct.  The
-   precalculation is extended from 20 bits to 32 bits.  This hopefully
-   gives us the needed bits to get us still along with one iteration
-   step.  */
+  1.0 / SQR_CBRT2,
+  1.0 / CBRT2,
+  1.0,
+  CBRT2,
+  SQR_CBRT2
+};
 
-    /* rough cbrt to 5 bits */
-	if(se==0) 		/* subnormal number */
-	  {
-	    u_int64_t xxl;
-	    u_int32_t set,t0,t1;
-	    SET_LDOUBLE_EXP(t,0x4035);	/* set t= 2**54 */
-	    SET_LDOUBLE_MSW(t,0x80000000);
-	    t*=x;
-	    GET_LDOUBLE_WORDS(set,t0,t1,t);
-	    xxl = ((u_int64_t) set) << 32 | t0;
-	    xxl /= 3;
-	    xxl += B2_EXP << 16 | B2_MANT;
-	    t0 = xxl & 0xffffffffu;
-	    set = xxl >> 32;
-	    SET_LDOUBLE_WORDS(t,set,t0,t1);
-	  }
-	else
-	  {
-	    u_int64_t xxl = ((u_int64_t) se) << 32 | x0;
-	    xxl /= 3;
-	    xxl += ((u_int64_t) B1_EXP) << 32 | B1_MANT;
-	    SET_LDOUBLE_MSW(t,xxl&0xffffffffu);
-	    xxl >>= 32;
-	    SET_LDOUBLE_EXP(t,xxl);
-	  }
 
-
-    /* new cbrt to 23 bits, may be implemented in single precision */
-	r=t*t/x;
-	s=C+r*t;
-	t*=G+F/(s+E+D/s);
-
-    /* chopped to 32 bits and make it larger than cbrt(x) */
-	GET_LDOUBLE_WORDS(se,x0,x1,t);
-	SET_LDOUBLE_WORDS(t,se,x0+1,0);
-
-
-    /* one step newton iteration to 53 bits with error less than 0.667 ulps */
-	s=t*t;		/* t*t is exact */
-	r=x/s;
-	w=t+t;
-	r=(r-t)/(w+r);	/* r-s is exact */
-	t=t+t*r;
-
-    /* retore the sign bit */
-	GET_LDOUBLE_EXP(se,t);
-	SET_LDOUBLE_EXP(t,se|sign);
-	return(t);
+long double
+__cbrtl (long double x)
+{
+  long double xm, ym, u, t2;
+  int xe;
+
+  /* Reduce X.  XM now is an range 1.0 to 0.5.  */
+  xm = __frexpl (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 = (0.338058687610520237
+       + (1.67595307700780102
+	  + (-2.82414939754975962
+	     + (4.09559907378707839 +
+		(-4.11151425200350531
+		 + (2.65298938441952296 +
+		    (-0.988553671195413709
+		     + 0.161617097923756032 * xm)
+		    * 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 __ldexpl (x > 0.0 ? ym : -ym, xe / 3);
 }
 weak_alias (__cbrtl, cbrtl)