Update.cvs/libc-ud-970924

1997-09-25 00:23  Ulrich Drepper  <drepper@cygnus.com>

	* elf/dl-profile.c: Correct implementation.

	* io/ftwtest-sh: Don't depend on TMPDIR == /tmp.

	* locale/setlocale.c: Rewrite a bit for more clarity.

	* math/Makefile (libm-calls): Add w_exp2.
	* math/math_private.h: Add prototypes for __ieee754_exp2{,f,l}.
	* sysdeps/libm-i387/s_exp2.S: Change name to __ieee754_exp2.
	* sysdeps/libm-i387/s_exp2f.S: Likewise.
	* sysdeps/libm-i387/s_exp2l.S: Likewise.
	* sysdeps/libm-ieee754/k_standard.c: Add error cases for exp2.

	* string/bits/string2.h (__strcpy_small): Optimize.
	(__stpcpy_small): Likewise.
	(strncpy): Use variable for dest argument since it's used more than
	once.
	(strncat): Likewise.
	(strcmp): Add optimization for this function.
	* sysdeps/i386/i486/string.h (strlen): Correctly use __builtin_strlen.
	(__strcpy_small): Optimize.
	(__stpcpy_small): Likewise.
	(__stpcpy_c): Correctly use __mempcpy_* macros.
	(__mempcpy_by2, __mempcpy_by4, __mempcpy_byn): Return pointer to
	byte following last copied.
	(strncat): Use variable for dest argument since it's used more than
	once.
	(strcmp): Add optimization for this function.

	* sysdeps/i386/dl-machine.h (ELF_MACHINE_RUNTIME_TRAMPOLINE): Use
	.text and .previous to select correct section.

1997-09-23 19:56  Philip Blundell  <Philip.Blundell@pobox.com>

	* configure.in: Add `--disable-versioning' option to suppress the
	use of symbol versions even if binutils claims to support it.

1997-09-24 20:10  Philip Blundell  <Philip.Blundell@pobox.com>

	* csu/Makefile (before-compile): Don't try to build abi-tags.h if
	not using ELF.

1997-09-21  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* elf/sofini.c [HAVE_DWARF2_UNWIND_INFO]: Supply termination for
	the frame unwind info section.

	* elf/soinit.c [HAVE_DWARF2_UNWIND_INFO]: Register and unregister
	the frame unwind info.

	* config.h.in (HAVE_DWARF2_UNWIND_INFO): Add #undef.

	* configure.in: Check whether gcc supports DWARF2 unwind info.

	* libc.map: Export frame handling tables.

1997-09-10 06:56  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/unix/sysv/linux/powerpc/bits/kernel_termios.h:
	Use the size of the kernel's termios structure for ioctls.

	* sysdeps/powerpc/dl-machine.h: Prepare for library profiling.

	* sysdeps/powerpc/bits/mathinline.h: Add slightly slower versions
	of the C9X FP comparison macros. Delete 'fabs' and 'sqrt' inline
	routines, because gcc has them as internals.

	* sysdeps/powerpc/Makefile (pic-ccflags): Define this instead of
	CFLAGS-.os.

	* sysdeps/powerpc/bzero.S: New file.
	* sysdeps/powerpc/strcat.c: New file.
	* sysdeps/powerpc/strcpy.S: New file.
	* sysdeps/powerpc/stpcpy.S: New file.

	* math/Makefile: Add atest_exp2, test-reduce.
	* math/atest_exp2.c: New file.
	* math/test-reduce.c: New file.
	* sysdeps/libm-ieee754/Dist: New file.
	* sysdeps/libm-ieee754/s_exp2.c: New file.
	* sysdeps/libm-ieee754/s_exp2f.c: New file.
	* sysdeps/libm-ieee754/t_exp2.h: New file.
	* sysdeps/libm-ieee754/t_exp2f.h: New file.
	* math/libm-test.c (exp2_test): Add some more tests.

	* Rules: Use empty.os instead of empty.o, since it gets linked into
	libc.so...
	* configure.in: Add --disable-static to disable building .a files.
	* config.make.in: Substitute the new variable.
	* Makeconfig: Don't build .o files if not building .a files.

	* elf/dl-runtime.c (fixup): Factor out call to elf_machine_relplt.
	(profile_fixup): Likewise.

1997-09-23  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* posix/globtest.c (main): Change to directory passed as first
	argument.

	* posix/globtest.sh: Don't cd before running the program, instead
	pass testdir as argument, so that $common_objpfx remains valid.

1997-09-23 18:01  Thorsten Kukuk  <kukuk@vt.uni-paderborn.de>

	* nis/nis_call.c (__do_niscall2): Fix multiple Server support.

	* nis/nis_findserver.c: Save latest working sockaddr_in.

1997-09-17 22:07  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* configure.in: Automatically determine whether as and ld are the
	GNU versions.
	(options):  --with-gnu-{as,ld,binutils} replaced by
	single option --with-binutils=PATH specifying a -B option to gcc.
	* aclocal.m4: Two new macros defined, LIBC_PROG_FOO_GNU and
	LIBC_PROG_BINUTILS.

	* configure.in: Allow the user to force configuration for
	unsupported platforms with an undocumented option.

1997-09-22 16:55  Thorsten Kukuk  <kukuk@vt.uni-paderborn.de>

	* sunrpc/get_myaddr.c (get_myaddress): Avoid loopback interfaces,
	return loopback address only if there is no other interface.

	* nis/Makefile: Add nis_callback libnsl-routines.

	* nis/nis_add.c: Use new __do_niscall* interface.
	* nis/nis_cache.c: Likewise.
	* nis/nis_checkpoint.c: Likewise.
	* nis/nis_lookup.c: Likewise.
	* nis/nis_mkdir.c: Likewise.
	* nis/nis_modify.c: Likewise.
	* nis/nis_ping.c: Likewise.
	* nis/nis_remove.c: Likewise.
	* nis/nis_rmdir.c: Likewise.
	* nis/nis_server.c: Likewise.
	* nis/nis_util.c: Likewise.

	* nis/rpcsvc/nis.h: Make C++ safe.

	* nis/nss_nisplus/nisplus-publickey.c (getsecretkey): Fix use
	of variables.

	* nis/nis_findserv.c: Make thread safe.

	* nis/nis_call.c: Add support for callback, Fix use of variables.
	* nis/nis_table.c: Add support for callback, FOLLOW_PATH and
	ALL_RESULTS.
	* nis/nis_callback.c: New, callback functions.
	* nis/nis_intern.h: Add callback declarations.

1997-09-20  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* string/bits/string2.h: Fix logic in preprocessor directive.
	(__strsep_1c, __strsep_g): Don't declare __retval as pointing to
	const, to save a cast and a possible warning.

1997-09-22 04:12  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/i386/i486/atomicity.h (exchange_and_add): Really address
	memory in xadd not %1.

1997-09-21 13:56  Ulrich Drepper  <drepper@cygnus.com>

	* manual/maint.texi (Supported Configurations): Add SPARC64 to
	list of supported platforms.

1 files changed, 207 insertions, 0 deletions

diff --git a/math/test-reduce.c b/math/test-reduce.c
new file mode 100644
index 0000000000..5149ead341
--- /dev/null
+++ b/math/test-reduce.c
@@ -0,0 +1,207 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Geoffrey Keating <Geoff.Keating@anu.edu.au>, 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.  */
+
+/* This is a generic program for comparing two precisions of a one-input
+   mathematical function.  It is amazingly good at detecting when GCC
+   folds constants improperly.  */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <math.h>
+#include <ieee754.h>
+#include <fenv.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#define TSMALL float
+#define RSMALL(rfun) ({ unsigned rnum = (rfun); *(float *) &rnum; })
+#define TBIG double
+#define XDIFF (24)
+#define REDUCE(x) \
+   ({ union ieee754_float u = { x }; u.ieee.exponent = 0x80; x = u.f; })
+#define ABS(x) fabs(x)
+
+#define string_0(x) #x
+#define string_1(x) string_0(x)
+#define TBIG_NAME string_1(TBIG)
+#define TSMALL_NAME string_1(TSMALL)
+
+#define R_NEAREST 1
+#define R_ZERO 2
+#define R_UP 4
+#define R_DOWN 8
+#define R_ALL (R_NEAREST|R_ZERO|R_UP|R_DOWN)
+static fenv_t rmodes[4];
+static const char * const rmnames[4] =
+{ "near","zero","+Inf","-Inf" };
+
+static int quiet = 0;
+
+#ifdef FE_ALL_INVALID
+static const int invalid_exceptions = (FE_ALL_INVALID
+				       | FE_INVALID | FE_DIVBYZERO);
+#else
+static const int invalid_exceptions = (FE_INVALID | FE_DIVBYZERO);
+#endif
+
+static int
+checkit (char *fname,
+	 TSMALL (*fsmall) (TSMALL), TBIG (*fbig) (TBIG),
+	 unsigned smalltries, unsigned largetries)
+{
+  unsigned int i, nerrors = 0, nwarn;
+
+  int tryone (TSMALL fval)
+    {
+      int rmode;
+      int excepts, exceptsb;
+      TSMALL fres;
+      TBIG fvalb, fresb, diff;
+      char warn;
+
+      fvalb = (TBIG) fval;
+
+      for (rmode = 0; rmode < 4; ++rmode)
+	{
+	  fesetenv (rmodes + rmode);
+	  fres = fsmall (fval);
+	  excepts = fetestexcept (invalid_exceptions);
+	  fesetenv (rmodes + rmode);
+	  fresb = fbig (fvalb);
+	  exceptsb = fetestexcept (invalid_exceptions);
+
+	  if (excepts != exceptsb)
+	    {
+	      unsigned char *fvp = (unsigned char *) &fval;
+	      size_t j;
+
+	      printf ("%s(", fname);
+	      for (j = 0; j < sizeof (TSMALL); j++)
+		printf ("%02x", fvp[j]);
+	      printf ("),%s: exceptions %s: %08x, %s: %08x\n",
+		      rmnames[rmode],
+		      TBIG_NAME, exceptsb, TSMALL_NAME, excepts);
+	      if (++nerrors > 10)
+		return 1;
+	    }
+
+	  diff = ABS (fres - (TSMALL) fresb);
+	  if (fres == (TSMALL) fresb
+	      || isnan (fres) && isnan (fresb)
+	      || logb (fresb) - logb (diff) < XDIFF - 1)
+	    continue;
+
+	  if (logb (fresb) - logb (diff) < XDIFF)
+	    {
+	      if (++nwarn > 10 || quiet)
+		continue;
+	      warn = 'w';
+	    }
+	  else
+	    {
+	      if (++nerrors > 10)
+		return 1;
+	      warn = 'e';
+	    }
+
+	  {
+	    TSMALL fresbs = (TSMALL) fresb;
+	    unsigned char *fvp = (unsigned char *) &fval;
+	    unsigned char *frp = (unsigned char *) &fres;
+	    unsigned char *frpb = (unsigned char *) &fresb;
+	    unsigned char *frpbs = (unsigned char *) &fresbs;
+	    size_t j;
+
+	    printf ("%s(",fname);
+	    for (j = 0; j < sizeof (TSMALL); ++j)
+	      printf ("%02x", fvp[j]);
+	    printf ("),%s: %s ", rmnames[rmode], TBIG_NAME);
+	    for (j = 0; j < sizeof (TBIG); ++j)
+	      printf ("%02x", frpb[j]);
+	    printf (" (");
+	    for (j = 0; j < sizeof (TSMALL); ++j)
+	      printf ("%02x", frpbs[j]);
+	    printf ("), %s ", TSMALL_NAME);
+	    for (j = 0; j < sizeof (TSMALL); ++j)
+	      printf ("%02x", frp[j]);
+	    printf (" %c\n", warn);
+	  }
+	}
+      return 0;
+    }
+
+  nwarn = 0;
+  for (i = 0; i < smalltries; i++)
+    {
+      TSMALL fval;
+
+      fval = RSMALL (rand () ^ rand () << 16);
+      REDUCE (fval);
+      if (tryone (fval))
+	break;
+    }
+
+  printf ("%s-small: %d errors, %d (%0.2f%%) inaccuracies\n",
+	  fname, nerrors, nwarn,
+	  nwarn * 0.25 / ((double) smalltries));
+
+  nwarn = 0;
+  for (i = 0; i < largetries; ++i)
+    {
+      TSMALL fval;
+
+      fval = RSMALL (rand () ^ rand () << 16);
+      if (tryone (fval))
+	break;
+    }
+
+  printf ("%s-large: %d errors, %d (%0.2f%%) inaccuracies\n",
+	  fname, nerrors, nwarn,
+	  nwarn * 0.25 / ((double) largetries));
+  return nerrors == 0;
+}
+
+int
+main (void)
+{
+  int r;
+
+  _LIB_VERSION = _IEEE_;
+
+  /* Set up environments for rounding modes.  */
+  fesetenv (FE_DFL_ENV);
+  fesetround (FE_TONEAREST);
+  fegetenv (rmodes + 0);
+  fesetround (FE_TOWARDSZERO);
+  fegetenv (rmodes + 1);
+  fesetround (FE_UPWARD);
+  fegetenv (rmodes + 2);
+  fesetround (FE_DOWNWARD);
+  fegetenv (rmodes + 3);
+
+  /* Seed the RNG.  */
+  srand (time (0));
+
+  /* Do it.  */
+  r  = checkit ("exp2", exp2f, exp2, 1 << 20, 1 << 15);
+  r &= checkit ("exp",  expf,  exp,  1 << 20, 1 << 15);
+  return r ? 0 : 1;
+}