Update.cvs/libc-ud-970322

1997-03-23 02:11  Ulrich Drepper  <drepper@cygnus.com>

	* time/sys/time.h: Make values ITIMER_* also available as macros.

	* elf/dl-support.c (_dl_sysdep_read_whole_file): Don't call
	__fstat but instead __fxstat directly to avoid dependency on
	libc.a when inline failed.
	* sysdeps/generic/dl-sysdep.c (_dl_sysdep_read_whole_file): Likewise.

	* math/Makefile (libm-routines): Add s_remquo.
	* sysdeps/libm-i387/s_remquo.S: New file.
	* sysdeps/libm-i387/s_remquof.S: New file.
	* sysdeps/libm-i387/s_remquol.S: New file.
	* sysdeps/libm-ieee754/s_remquo.c: New file.
	* sysdeps/libm-ieee754/s_remquof.c: New file.
	* sysdeps/libm-ieee754/s_remquol.c: New file.

	* math/libm-test.c (remquo_test): New function.

	* sysdeps/libm-ieee754/s_rintl.c: Handle implicit leading one
	correctly.

1997-03-22 14:06  Ulrich Drepper  <drepper@cygnus.com>

	* math/Makefile (libm-calls): Add s_nan.
	* sysdeps/libm-ieee754/s_nan.c: New file.  Implement `nan' function.
	* sysdeps/libm-ieee754/s_nanf.c: New file.  Implement `nanf' function.
	* sysdeps/libm-ieee754/s_nanl.c: New file.  Implement `nanl' function.

	* math/libm-test.c (basic_tests): Add tests for `nan' function.

	* math/libm-test.c (copysign_test): New function.
	(main): Call copysign_test.

1997-03-22 06:28  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/libm-ieee754/s_nextafter.c: Return y if x == y.
	* sysdeps/libm-ieee754/s_nextafterf.c: Likewise.
	* sysdeps/libm-ieee754/s_nextafterl.c: Likewise.
	* sysdeps/libm-i387/s_nextafterl.c: Likewise.

	* math/libm-test.c (fdim_test, fmin_test, fmax_test, nextafter_test):
	New functions.  Test these functions.
	(main): Call above new functions.

1997-03-22 04:53  Ulrich Drepper  <drepper@cygnus.com>

	* Net release 2.0.2.

1997-03-22 04:37  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/termbits.h (OXTABS): Define as alias for
	XTABS.
	* sysdeps/unix/sysv/linux/alpha/termbits.h (OXTABS): Likewise.
	* termios/sys/ttydefaults.h: Partly revert patch by Andreas Schwab
	of Sun Dec 15 16:33:44 1996.
	Proposed by Thomas Bushnell <thomas@gnu.ai.mit.edu>.

1997-03-21 13:41  Roland McGrath  <roland@baalperazim.frob.com>

	* sysdeps/sparc/dl-machine.h (elf_machine_rel): Rewritten as for i386.
	Check here for non-SHN_UNDEF STB_LOCAL symbols don't do any lookup or
	consult their values.
	(elf_machine_lookup_noexec_p, elf_machine_lookup_noplt_p,
	ELF_MACHINE_RELOC_NOPLT): New macros.

	* elf/rtld.c (dl_main): Pass ELF_MACHINE_RELOC_NOPLT to
	_dl_lookup_symbol in place of DL_LOOKUP_NOPLT.
	* sysdeps/i386/dl-machine.h (ELF_MACHINE_RELOC_NOPLT): New macro.

	* sysdeps/i386/dl-machine.h (elf_machine_rel): Rewritten to do the
	symbol lookup before checking reloc type except for R_386_RELATIVE.
	(elf_machine_lookup_noexec_p, elf_machine_lookup_noplt_p): New macros.

	* elf/dl-reloc.c (RESOLVE): Remove STB_LOCAL check; let it be
	per-machine since it supposedly can't happen on i386.

	* elf/dl-lookup.c (do_lookup): Change arg FLAGS to RELOC_TYPE.  Use
	elf_machine_lookup_{noexec,noplt}_p macros on it.  Remove gratuitous
	indirection from REF arg; change callers.
	(_dl_lookup_symbol, _dl_lookup_versioned_symbol): Change arg name.
	(_dl_lookup_symbol_skip, _dl_lookup_versioned_symbol_skip): Remove
	FLAGS arg altogether.
	* elf/dlsym.c: Remove argument of FLAGS parameter.
	* elf/dlvsym.c: Likewise.
	* elf/link.h: Update decls.

	* Makefile (distribute): Add BUGS.

13 files changed, 639 insertions, 10 deletions

diff --git a/sysdeps/libm-ieee754/s_nan.c b/sysdeps/libm-ieee754/s_nan.c
new file mode 100644
index 0000000000..58551c1ad5
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_nan.c
@@ -0,0 +1,47 @@
+/* Return quiet nan.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by 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.  */
+
+/* XXX The ISO C 9X standard mentions a `n-char-sequence' which is provided
+   as the argument to this function but I have no clue what this means.
+   Perhaps it is a description of the bits set in the mantissa.  */
+#include <math.h>
+#ifdef HANDLE_TAGP
+# include <stdlib.h>
+# include <string.h>
+#else
+# include <ieee754.h>
+#endif
+
+
+double
+nan (const char *tagp)
+{
+#ifdef HANDLE_TAGP
+  /* If we ever should have use of the TAGP parameter we will use the
+     strtod function to analyze it.  */
+  char buf[6 + strlen (tagp)];
+  sprintf (buf, "NAN(%s)", tagp);
+  return strtod (buf, NULL);
+#else
+  static const union ieee754_double nan_value =
+  { ieee: { mantissa1: 0x1, mantissa0: 0x0, exponent: 0x7ff, negative: 0 } };
+  return nan_value.d;
+#endif
+}
diff --git a/sysdeps/libm-ieee754/s_nanf.c b/sysdeps/libm-ieee754/s_nanf.c
new file mode 100644
index 0000000000..e965b94b33
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_nanf.c
@@ -0,0 +1,47 @@
+/* Return quiet nan.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by 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.  */
+
+/* XXX The ISO C 9X standard mentions a `n-char-sequence' which is provided
+   as the argument to this function but I have no clue what this means.
+   Perhaps it is a description of the bits set in the mantissa.  */
+#include <math.h>
+#ifdef HANDLE_TAGP
+# include <stdlib.h>
+# include <string.h>
+#else
+# include <ieee754.h>
+#endif
+
+
+float
+nanf (const char *tagp)
+{
+#ifdef HANDLE_TAGP
+  /* If we ever should have use of the TAGP parameter we will use the
+     strtod function to analyze it.  */
+  char buf[6 + strlen (tagp)];
+  sprintf (buf, "NAN(%s)", tagp);
+  return strtof (buf, NULL);
+#else
+  static const union ieee754_float nan_value =
+  { ieee: { mantissa: 0x1, exponent: 0xff, negative: 0 } };
+  return nan_value.f;
+#endif
+}
diff --git a/sysdeps/libm-ieee754/s_nanl.c b/sysdeps/libm-ieee754/s_nanl.c
new file mode 100644
index 0000000000..df0180ee46
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_nanl.c
@@ -0,0 +1,48 @@
+/* Return quiet nan.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by 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.  */
+
+/* XXX The ISO C 9X standard mentions a `n-char-sequence' which is provided
+   as the argument to this function but I have no clue what this means.
+   Perhaps it is a description of the bits set in the mantissa.  */
+#include <math.h>
+#ifdef HANDLE_TAGP
+# include <stdlib.h>
+# include <string.h>
+#else
+# include <ieee754.h>
+#endif
+
+
+long double
+nanl (const char *tagp)
+{
+#ifdef HANDLE_TAGP
+  /* If we ever should have use of the TAGP parameter we will use the
+     strtod function to analyze it.  */
+  char buf[6 + strlen (tagp)];
+  sprintf (buf, "NAN(%s)", tagp);
+  return strtold (buf, NULL);
+#else
+  static const union ieee854_long_double nan_value =
+  { ieee: { mantissa1: 0x1, mantissa0: 0x80000000,
+	    exponent: 0x7fff, negative: 0 } };
+  return nan_value.d;
+#endif
+}
diff --git a/sysdeps/libm-ieee754/s_nextafter.c b/sysdeps/libm-ieee754/s_nextafter.c
index ee973bcee8..b98a161cf2 100644
--- a/sysdeps/libm-ieee754/s_nextafter.c
+++ b/sysdeps/libm-ieee754/s_nextafter.c
@@ -42,7 +42,7 @@ static char rcsid[] = "$NetBSD: s_nextafter.c,v 1.8 1995/05/10 20:47:58 jtc Exp
 	if(((ix>=0x7ff00000)&&((ix-0x7ff00000)|lx)!=0) ||   /* x is nan */
 	   ((iy>=0x7ff00000)&&((iy-0x7ff00000)|ly)!=0))     /* y is nan */
 	   return x+y;
-	if(x==y) return x;		/* x=y, return x */
+	if(x==y) return y;		/* x=y, return y */
 	if((ix|lx)==0) {			/* x == 0 */
 	    INSERT_WORDS(x,hy&0x80000000,1);	/* return +-minsubnormal */
 	    y = x*x;
diff --git a/sysdeps/libm-ieee754/s_nextafterf.c b/sysdeps/libm-ieee754/s_nextafterf.c
index bc8d04260f..611742bdf4 100644
--- a/sysdeps/libm-ieee754/s_nextafterf.c
+++ b/sysdeps/libm-ieee754/s_nextafterf.c
@@ -8,7 +8,7 @@
  *
  * Developed at SunPro, a Sun Microsystems, Inc. business.
  * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice 
+ * software is freely granted, provided that this notice
  * is preserved.
  * ====================================================
  */
@@ -34,15 +34,15 @@ static char rcsid[] = "$NetBSD: s_nextafterf.c,v 1.4 1995/05/10 20:48:01 jtc Exp
 	ix = hx&0x7fffffff;		/* |x| */
 	iy = hy&0x7fffffff;		/* |y| */
 
-	if((ix>0x7f800000) ||   /* x is nan */ 
-	   (iy>0x7f800000))     /* y is nan */ 
-	   return x+y;				
-	if(x==y) return x;		/* x=y, return x */
+	if((ix>0x7f800000) ||   /* x is nan */
+	   (iy>0x7f800000))     /* y is nan */
+	   return x+y;
+	if(x==y) return y;		/* x=y, return y */
 	if(ix==0) {				/* x == 0 */
 	    SET_FLOAT_WORD(x,(hy&0x80000000)|1);/* return +-minsubnormal */
 	    y = x*x;
 	    if(y==x) return y; else return x;	/* raise underflow flag */
-	} 
+	}
 	if(hx>=0) {				/* x > 0 */
 	    if(hx>hy) {				/* x > y, x -= ulp */
 		hx -= 1;
diff --git a/sysdeps/libm-ieee754/s_nextafterl.c b/sysdeps/libm-ieee754/s_nextafterl.c
index 0327261f33..1d3fc86c44 100644
--- a/sysdeps/libm-ieee754/s_nextafterl.c
+++ b/sysdeps/libm-ieee754/s_nextafterl.c
@@ -46,7 +46,7 @@ static char rcsid[] = "$NetBSD: $";
 	if(((ix==0x7fff)&&((hx|lx)|-(hx|lx))!=0) ||   /* x is nan */
 	   ((iy==0x7fff)&&((hy|ly)|-(hy|ly))!=0))     /* y is nan */
 	   return x+y;
-	if(x==y) return x;		/* x=y, return x */
+	if(x==y) return y;		/* x=y, return y */
 	if((ix|hx|lx)==0) {			/* x == 0 */
 	    SET_LDOUBLE_WORDS(x,esx&0x8000,0,1);/* return +-minsubnormal */
 	    y = x*x;
diff --git a/sysdeps/libm-ieee754/s_remquo.c b/sysdeps/libm-ieee754/s_remquo.c
new file mode 100644
index 0000000000..5a96f75f3b
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_remquo.c
@@ -0,0 +1,106 @@
+/* Compute remainder and a congruent to the quotient.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by 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"
+
+
+static const double zero = 0.0;
+
+
+double
+__remquo (double x, double y, int *quo)
+{
+  int32_t hx,hp;
+  u_int32_t sx,lx,lp;
+  int cquo;
+
+  EXTRACT_WORDS (hx, lx, x);
+  EXTRACT_WORDS (hp, lp, p);
+  sx = hx & 0x80000000;
+  qs = (sx ^ (hp & 0x80000000)) >> 31;
+  hp &= 0x7fffffff;
+  hx &= 0x7fffffff;
+
+  /* Purge off exception values.  */
+  if ((hp | lp) == 0)
+    return (x * p) / (x * p); 			/* p = 0 */
+  if ((hx >= 0x7ff00000)			/* x not finite */
+      || ((hp >= 0x7ff00000)			/* p is NaN */
+	  && (((hp - 0x7ff00000) | lp) != 0)))
+    return (x * p) / (x * p);
+
+  if (hp <= 0x7fbfffff)
+    {
+      x = __ieee754_fmod (x, 8 * p);		/* now x < 8p */
+
+      if (fabs (x) >= 4 * fabs (p))
+	cquo += 4;
+    }
+
+  if (((hx - hp) | (lx - lp)) == 0)
+    {
+      *quo = qs ? -1 : 1;
+      return zero * x;
+    }
+
+  x  = fabs (x);
+  p  = fabs (p);
+  cquo = 0;
+
+  if (x >= 2 * p)
+    {
+      x -= 4 * p;
+      cquo += 2;
+    }
+  if (x >= p)
+    {
+      x -= 2 * p;
+      ++cquo;
+    }
+
+  if (hp < 0x00200000)
+    {
+      if (x + x > p)
+	{
+	  x -= p;
+	  if (x + x >= p)
+	    x -= p;
+	}
+    }
+  else
+    {
+      double p_half = 0.5 * p;
+      if(x > p_half)
+	{
+	  x -= p;
+	  if (x >= p_half)
+	    x -= p;
+	}
+    }
+
+  *quo = qs ? -cquo : cquo;
+
+  GET_HIGH_WORD (hx, x);
+  SET_HIGH_WORD (x, hx ^ sx);
+  return x;
+}
+weak_alias (__remquo, remquo)
diff --git a/sysdeps/libm-ieee754/s_remquof.c b/sysdeps/libm-ieee754/s_remquof.c
new file mode 100644
index 0000000000..cce5495ce8
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_remquof.c
@@ -0,0 +1,105 @@
+/* Compute remainder and a congruent to the quotient.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by 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"
+
+
+static const float zero = 0.0;
+
+
+float
+__remquof (float x, float y, int *quo)
+{
+  int32_t hx,hp;
+  u_int32_t sx;
+  int cquo;
+
+  GET_FLOAT_WORD (hx, x);
+  GET_FLOAT_WORD (hp, p);
+  sx = hx & 0x80000000;
+  qs = (sx ^ (hp & 0x80000000)) >> 31;
+  hp &= 0x7fffffff;
+  hx &= 0x7fffffff;
+
+  /* Purge off exception values.  */
+  if (hp == 0)
+    return (x * p) / (x * p); 			/* p = 0 */
+  if ((hx >= 0x7f800000)			/* x not finite */
+      || (hp > 0x7f800000))			/* p is NaN */
+    return (x * p) / (x * p);
+
+  if (hp <= 0x7dffffff)
+    {
+      x = __ieee754_fmodf (x, 8 * p);		/* now x < 8p */
+
+      if (fabs (x) >= 4 * fabs (p))
+	cquo += 4;
+    }
+
+  if ((hx - hp) == 0)
+    {
+      *quo = qs ? -1 : 1;
+      return zero * x;
+    }
+
+  x  = fabsf (x);
+  p  = fabsf (p);
+  cquo = 0;
+
+  if (x >= 2 * p)
+    {
+      x -= 4 * p;
+      cquo += 2;
+    }
+  if (x >= p)
+    {
+      x -= 2 * p;
+      ++cquo;
+    }
+
+  if (hp < 0x01000000)
+    {
+      if (x + x > p)
+	{
+	  x -= p;
+	  if (x + x >= p)
+	    x -= p;
+	}
+    }
+  else
+    {
+      float p_half = 0.5 * p;
+      if(x > p_half)
+	{
+	  x -= p;
+	  if (x >= p_half)
+	    x -= p;
+	}
+    }
+
+  *quo = qs ? -cquo : cquo;
+
+  GET_FLOAT_WORD (hx, x);
+  SET_FLOAT_WORD (x, hx ^ sx);
+  return x;
+}
+weak_alias (__remquof, remquof)
diff --git a/sysdeps/libm-ieee754/s_remquol.c b/sysdeps/libm-ieee754/s_remquol.c
new file mode 100644
index 0000000000..9515b218c6
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_remquol.c
@@ -0,0 +1,106 @@
+/* Compute remainder and a congruent to the quotient.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by 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"
+
+
+static const double zero = 0.0;
+
+
+long double
+__remquol (long double x, long double y, int *quo)
+{
+  int32_t ex,ep,hx,hp;
+  u_int32_t sx,lx,lp;
+  int cquo;
+
+  GET_LDOUBLE_WORDS (ex, hx, lx, x);
+  GET_LDOUBLE_WORDS (ep, hp, lp, p);
+  sx = ex & 0x8000;
+  qs = (sx ^ (ep & 0x8000)) >> 15;
+  ep &= 0x7fff;
+  ex &= 0x7fff;
+
+  /* Purge off exception values.  */
+  if ((ep | hp | lp) == 0)
+    return (x * p) / (x * p); 			/* p = 0 */
+  if ((ex == 0x7fff)				/* x not finite */
+      || ((ep == 0x7fff)			/* p is NaN */
+	  && ((hp | lp) != 0)))
+    return (x * p) / (x * p);
+
+  if (ep <= 0x7ffb)
+    {
+      x = __ieee754_fmodl (x, 8 * p);		/* now x < 8p */
+
+      if (fabsl (x) >= 4 * fabsl (p))
+	cquo += 4;
+    }
+
+  if (((ex - ep) | (hx - hp) | (lx - lp)) == 0)
+    {
+      *quo = qs ? -1 : 1;
+      return zero * x;
+    }
+
+  x  = fabsl (x);
+  p  = fabsl (p);
+  cquo = 0;
+
+  if (x >= 2 * p)
+    {
+      x -= 4 * p;
+      cquo += 2;
+    }
+  if (x >= p)
+    {
+      x -= 2 * p;
+      ++cquo;
+    }
+
+  if (ep < 0x0002)
+    {
+      if (x + x > p)
+	{
+	  x -= p;
+	  if (x + x >= p)
+	    x -= p;
+	}
+    }
+  else
+    {
+      long double p_half = 0.5 * p;
+      if(x > p_half)
+	{
+	  x -= p;
+	  if (x >= p_half)
+	    x -= p;
+	}
+    }
+
+  *quo = qs ? -cquo : cquo;
+
+  GET_LDOUBLE_EXP (ex, x);
+  SET_LDOUBLE_EXP (x, ex ^ sx);
+  return x;
+}
+weak_alias (__remquol, remquol)
diff --git a/sysdeps/libm-ieee754/s_rintl.c b/sysdeps/libm-ieee754/s_rintl.c
index c9f12b162a..5b4b647880 100644
--- a/sysdeps/libm-ieee754/s_rintl.c
+++ b/sysdeps/libm-ieee754/s_rintl.c
@@ -54,7 +54,7 @@ TWO64[2]={
 	GET_LDOUBLE_WORDS(se,i0,i1,x);
 	sx = (se>>15)&1;
 	j0 = (se&0x7fff)-0x3fff;
-	if(j0<32) {
+	if(j0<31) {
 	    if(j0<0) {
 		if(((se&0x7fff)|i0|i1)==0) return x;
 		i1 |= i0;
@@ -67,7 +67,7 @@ TWO64[2]={
 		SET_LDOUBLE_EXP(t,(i0&0x7fff)|(sx<<15));
 	        return t;
 	    } else {
-		i = (0xffffffff)>>j0;
+		i = (0x7fffffff)>>j0;
 		if(((i0&i)|i1)==0) return x; /* x is integral */
 		i>>=1;
 		if(((i0&i)|i1)!=0) {
diff --git a/sysdeps/libm-ieee754/s_trunc.c b/sysdeps/libm-ieee754/s_trunc.c
new file mode 100644
index 0000000000..721dce5a55
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_trunc.c
@@ -0,0 +1,61 @@
+/* Truncate argument to nearest integral value not larger than the argument.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by 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"
+
+
+double
+__trunc (double x)
+{
+  int32_t i0, j0;
+  u_int32_t i1;
+  int sx;
+
+  EXTRACT_WORDS (i0, i1, x);
+  sx = i0 & 0x80000000;
+  j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
+  if (j0 < 20)
+    {
+      if (j0 < 0)
+	/* The magnitude of the number is < 1 so the result is +-0.  */
+	INSERT_WORDS (x, sx, 0);
+      else
+	INSERT_WORDS (x, sx | i0 & ~(0x000fffff >> j0), 0);
+    }
+  else if (j0 > 51)
+    {
+      if (j0 == 0x400)
+	/* x is inf or NaN.  */
+	return x + x;
+    }
+  else
+    {
+      INSERT_WORDS (x, i0, i1 & ~(0xffffffffu >> (j0 - 20)));
+    }
+
+  return x;
+}
+weak_alias (__trunc, trunc)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__trunc, __truncl)
+weak_alias (__trunc, truncl)
+#endif
diff --git a/sysdeps/libm-ieee754/s_truncf.c b/sysdeps/libm-ieee754/s_truncf.c
new file mode 100644
index 0000000000..3e7b133c37
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_truncf.c
@@ -0,0 +1,52 @@
+/* Truncate argument to nearest integral value not larger than the argument.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by 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"
+
+
+float
+__truncf (float x)
+{
+  int32_t i0, j0;
+  int sx;
+
+  GET_FLOAT_WORD (i0, x);
+  sx = i0 & 0x80000000;
+  j0 = ((i0 >> 23) & 0xff) - 0x7f;
+  if (j0 < 23)
+    {
+      if (j0 < 0)
+	/* The magnitude of the number is < 1 so the result is +-0.  */
+	SET_FLOAT_WORD (x, sx);
+      else
+	SET_FLOAT_WORD (x, sx | i0 & ~(0x007fffff >> j0));
+    }
+  else
+    {
+      if (j0 == 0x80)
+	/* x is inf or NaN.  */
+	return x + x;
+    }
+
+  return x;
+}
+weak_alias (__truncf, truncf)
diff --git a/sysdeps/libm-ieee754/s_truncl.c b/sysdeps/libm-ieee754/s_truncl.c
new file mode 100644
index 0000000000..206eab2f22
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_truncl.c
@@ -0,0 +1,57 @@
+/* Truncate argument to nearest integral value not larger than the argument.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by 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"
+
+
+long double
+__truncl (long double x)
+{
+  int32_t i0, j0;
+  u_int32_t se, i1;
+  int sx;
+
+  GET_LDOUBLE_WORDS (se, i0, i1, x);
+  sx = se & 0x8000;
+  j0 = se & 0x7fff;
+  if (j0 < 31)
+    {
+      if (j0 < 0)
+	/* The magnitude of the number is < 1 so the result is +-0.  */
+	SET_LDOUBLE_WORDS (x, sx, 0, 0);
+      else
+	SET_LDOUBLE_WORDS (x, se, i0 & ~(0x7fffffff >> j0), 0);
+    }
+  else if (j0 > 63)
+    {
+      if (j0 == 0x4000)
+	/* x is inf or NaN.  */
+	return x + x;
+    }
+  else
+    {
+      SET_LDOUBLE_WORDS (x, se, i0, i1 & ~(0xffffffffu >> (j0 - 31)));
+    }
+
+  return x;
+}
+weak_alias (__truncl, truncl)