Update. cvs/libc-ud-970904

1997-09-05 03:15  Ulrich Drepper  <drepper@cygnus.com>

	* Makefile (subdirs): Reorganize order so that nss follows add-ons.
	* config.make.in (LDAP): Add.
	* configure.in: Prepare for ldap add-on.
	* shlib-versions: Add version numbers for ldap NSS module.
	* nss/Makefile: Add rules to build ldap NSS module.

	* db/btree/bt_page.c (__bt_free): Update meta data information.

	Update db from db-2.3.6.
	* db2/db.h: Updated.
	* db2/btree/bt_close.c: Updated.
	* db2/btree/bt_compare.c: Updated.
	* db2/btree/bt_conv.c: Updated.
	* db2/btree/bt_cursor.c: Updated.
	* db2/btree/bt_delete.c: Updated.
	* db2/btree/bt_put.c: Updated.
	* db2/btree/bt_rec.c: Updated.
	* db2/btree/bt_recno.c: Updated.
	* db2/btree/bt_search.c: Updated.
	* db2/btree/bt_split.c: Updated.
	* db2/btree/bt_stat.c: Updated.
	* db2/common/db_appinit.c: Updated.
	* db2/common/db_apprec.c: Updated.
	* db2/common/db_byteorder.c: Updated.
	* db2/common/db_err.c: Updated.
	* db2/common/db_region.c: Updated.
	* db2/db/db.c: Updated.
	* db2/db/db_conv.c: Updated.
	* db2/db/db_dup.c: Updated.
	* db2/db/db_pr.c: Updated.
	* db2/db/db_ret.c: Updated.
	* db2/db185/db185.c: Updated.
	* db2/dbm/dbm.c: Updated.
	* db2/hash/hash_dup.c: Updated.
	* db2/include/db_am.h: Updated.
	* db2/include/db_page.h: Updated.
	* db2/include/mp.h: Updated.
	* db2/include/queue.h: Updated.
	* db2/log/log.c: Updated.
	* db2/log/log_findckp.c: Updated.
	* db2/log/log_get.c: Updated.
	* db2/log/log_rec.c: Updated.
	* db2/mp/mp_bh.c: Updated.
	* db2/mp/mp_fopen.c: Updated.
	* db2/mp/mp_pr.c: Updated.
	* db2/mp/mp_sync.c: Updated.
	* db2/mutex/x86.gcc: Updated.
	* db2/os/db_os_dir.c: Updated.
	* db2/os/db_os_fid.c: Updated.
	* db2/progs/db_archive/db_archive.c: Updated.
	* db2/progs/db_checkpoint/db_checkpoint.c: Updated.
	* db2/progs/db_deadlock/db_deadlock.c: Updated.
	* db2/progs/db_dump/db_dump.c: Updated.
	* db2/progs/db_dump185/db_dump185.c: Updated.
	* db2/progs/db_load/db_load.c: Updated.
	* db2/progs/db_printlog/db_printlog.c: Updated.
	* db2/progs/db_recover/db_recover.c: Updated.
	* db2/progs/db_stat/db_stat.c: Updated.
	* db2/txn/txn.c: Updated.
	* db2/txn/txn_rec.c: Updated.

	* db2/Makefile: Add rule to build db_printlog.
	* db2/config.h: Don't include endian.h and don't define
	WORDS_BIGENDIAN.  Only define HAVE_ENDIAN_H.

	* elf/dl-open.c (_dl_open): Make thread-safe.
	* elf/dl-close.c (_dl_close): Likewise.
	* elf/dlclose.c: Pretty print.
	* elf/dl-version.c (make_string): Use __strdup not strdup.
	(find_needed): Don't use l_searchlist of _dl_loaded, use the
	l_next list.
	* elf/dl-deps.c (_dl_map_object_deps): Remove variable head.

	* manual/math.texi: Add note about == and != for FP values.
	* manual/message.texi: Mention problems with relative paths and
	binstextdomain.
	* manual/string.texi: Mark strdupa and strndupa correctly as macros.

	* sunrpc/Makefile (CFLAGS-xkey_prot.c): Define to prevent warnings.
	* sunrpc/rpc_cout.c: Avoid needless races around return value.

	* sysdeps/generic/stpcpy.c: Include <config.h> if wanted.

	Update from tzdata-1997h.
	* time/africa: Updated.
	* time/europe: Updated.
	* time/iso3166.tab: Updated.
	* time/northamerica: Updated.
	* time/southamerica: Updated.
	* time/zone.tab: Updated.

1997-09-04 13:19  Richard Henderson  <rth@cygnus.com>

	* sysdeps/alpha/w_sqrt.S: Removed.
	* sysdeps/alpha/fpu/e_sqrt.c: New.  Obey -mieee and -mieee-with-inexact
	and build a version that is as fast as possible given the constraint.

1997-08-30  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* manual/maint.texi: Document some defaults for configuration
	parameters.

1997-09-04 15:57  Ulrich Drepper  <drepper@cygnus.com>

	* termios/cfsetspeed.c (cfsetspeed): Change return value to int.
	* termios/termios.h: Change prototype accordingly.
	Reported by Andreas Jaeger <aj@arthur.rhein-neckar.de>.

1997-07-26 14:42  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* libio/stdfiles.c (_libio_using_thunks): Define if
	_G_USING_THUNKS is defined.

	* libio/_G_config.h: Moved to ...
	* sysdeps/generic/_G_config.h: ...here.

	* sysdeps/unix/sysv/linux/_G_config.h: New,
	Add vtable thunks support.

1997-09-02  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/m68k/Makefile (pic-ccflag): Override it for more
	efficient code (together with a change in gcc).

	* Makeconfig (pic-ccflag): New variable.
	(CFLAGS-.os): Use it instead of hardcoding -fPIC.

1997-09-02  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/m68k/dl-machine.h (elf_machine_load_address): Use
	_dl_start instead of a local label, to avoid getting an unreadable
	label name.

1997-09-02  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* nss/Makefile ($(objpfx)libnss_db.so): Use $(dbobjdir) to find
	libdb.so.

	* Makeconfig (dbobjdir): Use db2.

1997-08-31  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* manual/maint.texi (Porting to Unix): Update description of the
	implementation of Unix system calls.
	(Contributors): Use real umlaut in tege's name.

1997-08-30  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/libm-ieee754/w_gamma.c: Make compilable with
	_IEEE_LIBM.
	* sysdeps/libm-ieee754/w_gammaf.c: Likewise.
	* sysdeps/libm-ieee754/w_gammal.c: Likewise.

1 files changed, 256 insertions, 0 deletions

diff --git a/sysdeps/alpha/fpu/e_sqrt.c b/sysdeps/alpha/fpu/e_sqrt.c
new file mode 100644
index 0000000000..76fa015622
--- /dev/null
+++ b/sysdeps/alpha/fpu/e_sqrt.c
@@ -0,0 +1,256 @@
+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   Contributed by David Mosberger (davidm@cs.arizona.edu).
+
+   This file is part of the GNU C Library.
+
+   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.  */
+
+/*
+ * We have three versions, depending on how exact we need the results.
+ */
+
+#if defined(_IEEE_FP) && defined(_IEEE_FP_INEXACT)
+
+/* Most demanding: go to the original source.  */
+#include <libm-ieee754/e_sqrt.c>
+
+#else
+
+/* Careful with rearranging this without consulting the assembly below.  */
+const static struct sqrt_data_struct {
+	unsigned long dn, up, half, almost_three_half;
+	unsigned long one_and_a_half, two_to_minus_30, one, nan;
+	const int T2[64];
+} sqrt_data = {
+	0x3fefffffffffffff,	/* __dn = nextafter(1,-Inf) */
+	0x3ff0000000000001,	/* __up = nextafter(1,+Inf) */
+	0x3fe0000000000000,	/* half */
+	0x3ff7ffffffc00000,	/* almost_three_half = 1.5-2^-30 */
+	0x3ff8000000000000,	/* one_and_a_half */
+	0x3e10000000000000,	/* two_to_minus_30 */
+	0x3ff0000000000000,	/* one */
+	0xffffffffffffffff,	/* nan */
+
+	{ 0x1500, 0x2ef8, 0x4d67, 0x6b02, 0x87be, 0xa395, 0xbe7a, 0xd866,
+	0xf14a, 0x1091b,0x11fcd,0x13552,0x14999,0x15c98,0x16e34,0x17e5f,
+	0x18d03,0x19a01,0x1a545,0x1ae8a,0x1b5c4,0x1bb01,0x1bfde,0x1c28d,
+	0x1c2de,0x1c0db,0x1ba73,0x1b11c,0x1a4b5,0x1953d,0x18266,0x16be0,
+	0x1683e,0x179d8,0x18a4d,0x19992,0x1a789,0x1b445,0x1bf61,0x1c989,
+	0x1d16d,0x1d77b,0x1dddf,0x1e2ad,0x1e5bf,0x1e6e8,0x1e654,0x1e3cd,
+	0x1df2a,0x1d635,0x1cb16,0x1be2c,0x1ae4e,0x19bde,0x1868e,0x16e2e,
+	0x1527f,0x1334a,0x11051,0xe951, 0xbe01, 0x8e0d, 0x5924, 0x1edd }
+};
+
+#ifdef _IEEE_FP
+/*
+ * This version is much faster than the standard one included above,
+ * but it doesn't maintain the inexact flag.
+ */
+
+#define lobits(x) (((unsigned int *)&x)[0])
+#define hibits(x) (((unsigned int *)&x)[1])
+
+static inline double initial_guess(double x, unsigned int k,
+	const struct sqrt_data_struct * const ptr)
+{
+	double ret = 0.0;
+
+	k = 0x5fe80000 - (k >> 1);
+	k = k - ptr->T2[63&(k>>14)];
+	hibits(ret) = k;
+	return ret;
+}
+
+/* up = nextafter(1,+Inf), dn = nextafter(1,-Inf) */
+
+#define __half			(ptr->half)
+#define __one_and_a_half	(ptr->one_and_a_half)
+#define __two_to_minus_30	(ptr->two_to_minus_30)
+#define __one			(ptr->one)
+#define __up			(ptr->up)
+#define __dn			(ptr->dn)
+#define __Nan			(ptr->nan)
+
+#define Double(x) (*(double *)&x)
+
+/* Multiply with chopping rounding.. */
+#define choppedmul(a,b,c) \
+  __asm__("multc %1,%2,%0":"=&f" (c):"f" (a), "f" (b))
+
+double
+__ieee754_sqrt(double x)
+{
+  const struct sqrt_data_struct * const ptr = &sqrt_data;
+  unsigned long k, bits;
+  double y, z, zp, zn;
+  double dn, up, low, high;
+  double half, one_and_a_half, one, two_to_minus_30;
+
+  *(double *)&bits = x;
+  k = bits;
+
+  /* Negative or NaN or Inf */
+  if ((k >> 52) >= 0x7ff)
+    goto special;
+  y = initial_guess(x, k >> 32, ptr);
+  half = Double(__half);
+  one_and_a_half = Double(__one_and_a_half);
+  y = y*(one_and_a_half - half*x*y*y);
+  dn = Double(__dn);
+  two_to_minus_30 = Double(__two_to_minus_30);
+  y = y*((one_and_a_half - two_to_minus_30) - half*x*y*y);
+  up = Double(__up);
+  z = x*y;
+  one = Double(__one);
+  z = z + half*z*(one-z*y);
+
+  choppedmul(z,dn,zp);
+  choppedmul(z,up,zn);
+
+  choppedmul(z,zp,low);
+  low = low - x;
+  choppedmul(z,zn,high);
+  high = high - x;
+
+  /* I can't get gcc to use fcmov's.. */
+  __asm__("fcmovge %2,%3,%0"
+	  :"=f" (z)
+	  :"0" (z), "f" (low), "f" (zp));
+  __asm__("fcmovlt %2,%3,%0"
+	  :"=f" (z)
+	  :"0" (z), "f" (high), "f" (zn));
+  return z;	/* Argh! gcc jumps to end here */
+
+special:
+  /* throw away sign bit */
+  k <<= 1;
+  /* -0 */
+  if (!k)
+    return x;
+  /* special? */
+  if ((k >> 53) == 0x7ff) {
+    /* NaN? */
+    if (k << 11)
+      return x;
+    /* sqrt(+Inf) = +Inf */
+    if (x > 0)
+      return x;
+  }
+
+  x = Double(__Nan);
+  return x;
+}
+
+#else
+/*
+ * This version is much faster than generic sqrt implementation, but
+ * it doesn't handle exceptional values or the inexact flag.
+ */
+
+asm ("\
+  /* Define offsets into the structure defined in C above.  */
+	$DN = 0*8
+	$UP = 1*8
+	$HALF = 2*8
+	$ALMOST_THREE_HALF = 3*8
+	$NAN = 7*8
+	$T2 = 8*8
+
+  /* Stack variables.  */
+	$K = 0
+	$Y = 8
+
+	.text
+	.align	3
+	.globl	__ieee754_sqrt
+	.ent	__ieee754_sqrt
+__ieee754_sqrt:
+	ldgp	$29, 0($27)
+	subq	$sp, 16, $sp
+	.frame	$sp, 16, $26, 0\n"
+#ifdef PROF
+"	lda	$28, _mcount
+	jsr	$28, ($28), _mcount\n"
+#endif
+"	.prologue 1
+
+	stt	$f16, $K($sp)
+	lda	$4, sqrt_data			# load base address into t3
+	fblt	$f16, $negative
+
+  /* Compute initial guess.  */
+
+	.align 3
+
+	ldah	$2, 0x5fe8			# e0    :
+	ldq	$3, $K($sp)			# .. e1 :
+	ldt	$f12, $HALF($4)			# e0    :
+	ldt	$f18, $ALMOST_THREE_HALF($4)	# .. e1 :
+	srl	$3, 33, $1			# e0    :
+	mult	$f16, $f12, $f11		# .. fm : $f11 = x * 0.5
+	subl	$2, $1, $2			# e0    :
+	addt	$f12, $f12, $f17		# .. fa : $f17 = 1.0
+	srl	$2, 12, $1			# e0    :
+	and	$1, 0xfc, $1			# .. e1 :
+	addq	$1, $4, $1			# e0    :
+	ldl	$1, $T2($1)			# .. e1 :
+	addt	$f12, $f17, $f15		# fa    : $f15 = 1.5
+	subl	$2, $1, $2			# .. e1 :
+	sll	$2, 32, $2			# e0    :
+	ldt	$f14, $DN($4)			# .. e1 :
+	stq	$2, $Y($sp)			# e0    :
+	ldt	$f13, $Y($sp)			# e1    :
+
+	mult	$f11, $f13, $f10	# fm    : $f10 = (x * 0.5) * y
+	mult	$f10, $f13, $f10	# fm    : $f10 = ((x * 0.5) * y) * y
+	subt	$f15, $f10, $f1		# fa    : $f1 = (1.5 - 0.5*x*y*y)
+	mult	$f13, $f1, $f13         # fm    : yp = y*(1.5 - 0.5*x*y*y)
+ 	mult	$f11, $f13, $f11	# fm    : $f11 = x * 0.5 * yp
+	mult	$f11, $f13, $f11	# fm    : $f11 = (x * 0.5 * yp) * yp
+	subt	$f18, $f11, $f1		# fa    : $f1= (1.5-2^-30) - 0.5*x*yp*yp
+	mult	$f13, $f1, $f13		# fm    : ypp = $f13 = yp*$f1
+	subt	$f15, $f12, $f1		# fa    : $f1 = (1.5 - 0.5)
+	ldt	$f15, $UP($4)		# .. e1 :
+	mult	$f16, $f13, $f10	# fm    : z = $f10 = x * ypp
+	mult	$f10, $f13, $f11	# fm    : $f11 = z*ypp
+	mult	$f10, $f12, $f12	# fm    : $f12 = z*0.5
+	subt	$f1, $f11, $f1		# .. fa : $f1 = 1 - z*ypp
+	mult	$f12, $f1, $f12		# fm    : $f12 = z*0.5*(1 - z*ypp)
+	addt	$f10, $f12, $f0		# fa    : zp=res=$f0= z + z*0.5*(1 - z*ypp)
+
+	mult/c	$f0, $f14, $f12		# fm    : zmi = zp * DN
+	mult/c	$f0, $f15, $f11		# fm    : zpl = zp * UP
+	mult/c	$f0, $f12, $f1		# fm    : $f1 = zp * zmi
+	mult/c	$f0, $f11, $f15		# fm    : $f15 = zp * zpl
+
+	subt    $f1, $f16, $f13		# fa    : y1 = zp*zmi - x
+	subt    $f15, $f16, $f15	# fa    : y2 = zp*zpl - x
+
+	fcmovge	$f13, $f12, $f0		# res = (y1 >= 0) ? zmi : res
+	fcmovlt	$f15, $f11, $f0		# res = (y2 <  0) ? zpl : res
+
+	addq	$sp, 16, $sp		# e0    :
+	ret				# .. e1 :
+
+$negative:
+	ldt	$f0, $NAN($4)
+	addq	$sp, 16, $sp
+	ret
+
+	.end	__ieee754_sqrt");
+
+#endif /* _IEEE_FP */
+#endif /* _IEEE_FP && _IEEE_FP_INEXACT */