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, 240 insertions, 0 deletions

diff --git a/math/atest-exp2.c b/math/atest-exp2.c
new file mode 100644
index 0000000..95e72aa
--- /dev/null
+++ b/math/atest-exp2.c
@@ -0,0 +1,240 @@
+/* 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.  */
+
+#include <stdio.h>
+#include <math.h>
+#include <gmp.h>
+#include <string.h>
+#include <limits.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#define PRINT_ERRORS 0
+
+#define TOL 80
+#define N2 18
+#define FRAC (32*4)
+
+#define mpbpl (CHAR_BIT * sizeof (mp_limb_t))
+#define SZ (FRAC / mpbpl + 1)
+typedef mp_limb_t mp1[SZ], mp2[SZ * 2];
+
+/* This string has 101 hex digits.  */
+static const char exp1[102] = "2" /* point */
+"b7e151628aed2a6abf7158809cf4f3c762e7160f38b4da56a7"
+"84d9045190cfef324e7738926cfbe5f4bf8d8d8c31d763da07";
+static const char exp_m1[102] = "0" /* point */
+"5e2d58d8b3bcdf1abadec7829054f90dda9805aab56c773330"
+"24b9d0a507daedb16400bf472b4215b8245b669d90d27a5aea";
+
+static const char hexdig[] = "0123456789abcdef";
+
+void
+print_mpn_fp (const mp_limb_t *x, unsigned int dp, unsigned int base)
+{
+   unsigned int i;
+   mp1 tx;
+
+   memcpy (tx, x, sizeof (mp1));
+   if (base == 16)
+     fputs ("0x", stdout);
+   assert (x[SZ-1] < base);
+   fputc (hexdig[x[SZ - 1]], stdout);
+   fputc ('.', stdout);
+   for (i = 0; i < dp; i++)
+     {
+       tx[SZ - 1] = 0;
+       mpn_mul_1 (tx, tx, SZ, base);
+       assert (tx[SZ - 1] < base);
+       fputc (hexdig[tx[SZ - 1]], stdout);
+     }
+}
+
+void
+read_mpn_hex(mp_limb_t *x, const char *str)
+{
+  int i;
+
+  memset (x, 0, sizeof (mp1));
+  for (i = -1; i < 100 && i < FRAC / 4; ++i)
+    x[(FRAC - i * 4 - 4) / mpbpl] |= (strchr (hexdig, str[i + 1]) - hexdig
+				      << (FRAC - i * 4 - 4) % mpbpl);
+}
+
+static mp_limb_t *get_log2(void) __attribute__((const));
+static mp_limb_t *
+get_log2(void)
+{
+  static mp1 log2_m;
+  static int log2_m_inited = 0;
+  static const char log2[102] = "0" /* point */
+    "b17217f7d1cf79abc9e3b39803f2f6af40f343267298b62d8a"
+    "0d175b8baafa2be7b876206debac98559552fb4afa1b10ed2e";
+
+  if (!log2_m_inited)
+    {
+      read_mpn_hex (log2_m, log2);
+      log2_m_inited = 1;
+    }
+  return log2_m;
+}
+
+/* Compute e^x.  */
+void
+exp_mpn (mp1 ex, mp1 x)
+{
+   unsigned int n;
+   mp1 xp;
+   mp2 tmp;
+   mp_limb_t chk, round;
+   mp1 tol;
+
+   memset (xp, 0, sizeof (mp1));
+   memset (ex, 0, sizeof (mp1));
+   xp[FRAC / mpbpl] = 1 << FRAC % mpbpl;
+   memset (tol, 0, sizeof (mp1));
+   tol[(FRAC - TOL) / mpbpl] = 1 << (FRAC - TOL) % mpbpl;
+
+   n = 0;
+
+   do
+     {
+       /* Calculate sum(x^n/n!) until the next term is sufficiently small.  */
+
+       mpn_mul_n (tmp, xp, x, SZ);
+       assert(tmp[SZ * 2 - 1] == 0);
+       if (n > 0)
+	 round = mpn_divmod_1 (xp, tmp + FRAC / mpbpl, SZ, n);
+       chk = mpn_add_n (ex, ex, xp, SZ);
+       assert (chk == 0);
+       ++n;
+       assert (n < 80); /* Catch too-high TOL.  */
+     }
+   while (n < 10 || mpn_cmp (xp, tol, SZ) >= 0);
+}
+
+/* Calculate 2^x.  */
+void
+exp2_mpn (mp1 ex, mp1 x)
+{
+  mp2 tmp;
+  mpn_mul_n (tmp, x, get_log2 (), SZ);
+  assert(tmp[SZ * 2 - 1] == 0);
+  exp_mpn (ex, tmp + FRAC / mpbpl);
+}
+
+
+static int
+mpn_bitsize(const mp_limb_t *SRC_PTR, mp_size_t SIZE)
+{
+  int i, j;
+  for (i = SIZE - 1; i > 0; --i)
+    if (SRC_PTR[i] != 0)
+      break;
+  for (j = mpbpl - 1; j > 0; --j)
+    if ((SRC_PTR[i] & 1 << j) != 0)
+      break;
+
+  return i * 32 + j;
+}
+
+int
+main (void)
+{
+  mp1 ex, x, xt, e2, e3;
+  int i;
+  int errors = 0;
+  int failures = 0;
+  mp1 maxerror;
+  int maxerror_s = 0;
+  const double sf = pow (2, mpbpl);
+
+  /* assert(mpbpl == mp_bits_per_limb); */
+  assert(FRAC / mpbpl * mpbpl == FRAC);
+
+  memset (maxerror, 0, sizeof (mp1));
+  memset (xt, 0, sizeof (mp1));
+  xt[(FRAC - N2) / mpbpl] = 1 << (FRAC - N2) % mpbpl;
+
+  for (i = 0; i < (1 << N2); ++i)
+    {
+      int e2s, e3s, j;
+      double de2;
+
+      mpn_mul_1 (x, xt, SZ, i);
+      exp2_mpn (ex, x);
+      de2 = exp2 (i / (double) (1 << N2));
+      for (j = SZ - 1; j >= 0; --j)
+	{
+	  e2[j] = (mp_limb_t) de2;
+	  de2 = (de2 - e2[j]) * sf;
+	}
+      if (mpn_cmp (ex, e2, SZ) >= 0)
+	mpn_sub_n (e3, ex, e2, SZ);
+      else
+	mpn_sub_n (e3, e2, ex, SZ);
+
+      e2s = mpn_bitsize (e2, SZ);
+      e3s = mpn_bitsize (e3, SZ);
+      if (e3s > 1 && e2s - e3s < 54)
+	{
+#if PRINT_ERRORS
+	  printf ("%06x ", i * (0x100000 / (1 << N2)));
+	  print_mpn_fp (ex, (FRAC / 4) + 1, 16);
+	  putchar ('\n');
+	  fputs ("       ",stdout);
+	  print_mpn_fp (e2, (FRAC / 4) + 1, 16);
+	  putchar ('\n');
+	  printf (" %c     ",
+		  e2s - e3s < 54 ? e2s - e3s == 53 ? 'e' : 'F' : 'P');
+	  print_mpn_fp (e3, (FRAC / 4) + 1, 16);
+	  putchar ('\n');
+#endif
+	  errors += (e2s - e3s == 53);
+	  failures += (e2s - e3s < 53);
+	}
+      if (e3s >= maxerror_s
+	  && mpn_cmp (e3, maxerror, SZ) > 0)
+	{
+	  memcpy (maxerror, e3, sizeof (mp1));
+	  maxerror_s = e3s;
+	}
+    }
+
+  /* Check exp_mpn against precomputed value of exp(1).  */
+  memset (x, 0, sizeof (mp1));
+  x[FRAC / mpbpl] = 1 << FRAC % mpbpl;
+  exp_mpn (ex, x);
+  read_mpn_hex (e2, exp1);
+  if (mpn_cmp (ex, e2, SZ) >= 0)
+    mpn_sub_n (e3, ex, e2, SZ);
+  else
+    mpn_sub_n (e3, e2, ex, SZ);
+
+  printf ("%d failures; %d errors; error rate %0.2f%%\n", failures, errors,
+	  errors * 100.0 / (double) (1 << N2));
+  fputs ("maximum error:   ", stdout);
+  print_mpn_fp (maxerror, (FRAC / 4) + 1, 16);
+  putchar ('\n');
+  fputs ("error in exp(1): ", stdout);
+  print_mpn_fp (e3, (FRAC / 4) + 1, 16);
+  putchar ('\n');
+
+  return failures == 0 ? 0 : 1;
+}