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2001-05-22  Andreas Jaeger  <aj@suse.de>

	* sysdeps/ieee754/ldbl-128/s_log1pl.c: New file, contributed by
	Stephen L Moshier <moshier@mediaone.net>.

2001-05-22  Martin Schwidefsky  <schwidefsky@de.ibm.com>

	* sysdeps/s390/s390-32/backtrace.c: Make backtrace return the
	return addresses instead of the stack pointers.
	* sysdeps/s390/s390-64/backtrace.c: Likewise.

2001-05-21  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h: Include
	bits/sigcontext.h instead of bits/sigstack.h.
	* sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h: Add
	multiple-inclusion guards.
This commit is contained in:
Andreas Jaeger 2001-05-22 08:46:19 +00:00
parent 0bc93a2fb1
commit 90b828e6ad
7 changed files with 273 additions and 6 deletions
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18
ChangeLog
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@ -1,3 +1,21 @@
2001-05-22 Andreas Jaeger <aj@suse.de>
* sysdeps/ieee754/ldbl-128/s_log1pl.c: New file, contributed by
Stephen L Moshier <moshier@mediaone.net>.
2001-05-22 Martin Schwidefsky <schwidefsky@de.ibm.com>
* sysdeps/s390/s390-32/backtrace.c: Make backtrace return the
return addresses instead of the stack pointers.
* sysdeps/s390/s390-64/backtrace.c: Likewise.
2001-05-21 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h: Include
bits/sigcontext.h instead of bits/sigstack.h.
* sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h: Add
multiple-inclusion guards.
2001-05-21 Andreas Jaeger <aj@suse.de>
* locale/programs/ld-collate.c (handle_ellipsis): Fix message.

3
NEWS
View File

@ -8,7 +8,8 @@ Please send GNU C library bug reports using the `glibcbug' script to
Version 2.2.4
* Stephen Moshier implemented expm1 for the 128-bit long double format.
* Stephen Moshier implemented expm1, log1p for the 128-bit long double
format.
Version 2.2.3

244
sysdeps/ieee754/ldbl-128/s_log1pl.c Normal file
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@ -0,0 +1,244 @@
/* log1pl.c
*
* Relative error logarithm
* Natural logarithm of 1+x, 128-bit long double precision
*
*
*
* SYNOPSIS:
*
* long double x, y, log1pl();
*
* y = log1pl( x );
*
*
*
* DESCRIPTION:
*
* Returns the base e (2.718...) logarithm of 1+x.
*
* The argument 1+x is separated into its exponent and fractional
* parts. If the exponent is between -1 and +1, the logarithm
* of the fraction is approximated by
*
* log(1+x) = x - 0.5 x^2 + x^3 P(x)/Q(x).
*
* Otherwise, setting z = 2(w-1)/(w+1),
*
* log(w) = z + z^3 P(z)/Q(z).
*
*
*
* ACCURACY:
*
* Relative error:
* arithmetic domain # trials peak rms
* IEEE -1, 8 100000 1.9e-34 4.3e-35
*/
/* Copyright 2001 by Stephen L. Moshier */
#include "math.h"
#include "math_private.h"
/* Coefficients for log(1+x) = x - x^2 / 2 + x^3 P(x)/Q(x)
* 1/sqrt(2) <= 1+x < sqrt(2)
* Theoretical peak relative error = 5.3e-37,
* relative peak error spread = 2.3e-14
*/
static long double
P12 = 1.538612243596254322971797716843006400388E-6L,
P11 = 4.998469661968096229986658302195402690910E-1L,
P10 = 2.321125933898420063925789532045674660756E1L,
P9 = 4.114517881637811823002128927449878962058E2L,
P8 = 3.824952356185897735160588078446136783779E3L,
P7 = 2.128857716871515081352991964243375186031E4L,
P6 = 7.594356839258970405033155585486712125861E4L,
P5 = 1.797628303815655343403735250238293741397E5L,
P4 = 2.854829159639697837788887080758954924001E5L,
P3 = 3.007007295140399532324943111654767187848E5L,
P2 = 2.014652742082537582487669938141683759923E5L,
P1 = 7.771154681358524243729929227226708890930E4L,
P0 = 1.313572404063446165910279910527789794488E4L,
/* Q12 = 1.000000000000000000000000000000000000000E0L, */
Q11 = 4.839208193348159620282142911143429644326E1L,
Q10 = 9.104928120962988414618126155557301584078E2L,
Q9 = 9.147150349299596453976674231612674085381E3L,
Q8 = 5.605842085972455027590989944010492125825E4L,
Q7 = 2.248234257620569139969141618556349415120E5L,
Q6 = 6.132189329546557743179177159925690841200E5L,
Q5 = 1.158019977462989115839826904108208787040E6L,
Q4 = 1.514882452993549494932585972882995548426E6L,
Q3 = 1.347518538384329112529391120390701166528E6L,
Q2 = 7.777690340007566932935753241556479363645E5L,
Q1 = 2.626900195321832660448791748036714883242E5L,
Q0 = 3.940717212190338497730839731583397586124E4L;
/* Coefficients for log(x) = z + z^3 P(z^2)/Q(z^2),
* where z = 2(x-1)/(x+1)
* 1/sqrt(2) <= x < sqrt(2)
* Theoretical peak relative error = 1.1e-35,
* relative peak error spread 1.1e-9
*/
static long double
R5 = -8.828896441624934385266096344596648080902E-1L,
R4 = 8.057002716646055371965756206836056074715E1L,
R3 = -2.024301798136027039250415126250455056397E3L,
R2 = 2.048819892795278657810231591630928516206E4L,
R1 = -8.977257995689735303686582344659576526998E4L,
R0 = 1.418134209872192732479751274970992665513E5L,
/* S6 = 1.000000000000000000000000000000000000000E0L, */
S5 = -1.186359407982897997337150403816839480438E2L,
S4 = 3.998526750980007367835804959888064681098E3L,
S3 = -5.748542087379434595104154610899551484314E4L,
S2 = 4.001557694070773974936904547424676279307E5L,
S1 = -1.332535117259762928288745111081235577029E6L,
S0 = 1.701761051846631278975701529965589676574E6L;
/* C1 + C2 = ln 2 */
static long double C1 = 6.93145751953125E-1L;
static long double C2 = 1.428606820309417232121458176568075500134E-6L;
static long double sqrth = 0.7071067811865475244008443621048490392848L;
/* ln (2^16384 * (1 - 2^-113)) */
static long double maxlog = 1.1356523406294143949491931077970764891253E4L;
static long double big = 2e4932L;
static long double zero = 0.0L;
#if 1
/* Make sure these are prototyped. */
long double frexpl (long double, int *);
long double ldexpl (long double, int);
#endif
long double
__log1pl (long double xm1)
{
long double x, y, z, r, s;
ieee854_long_double_shape_type u;
int32_t ix;
int e;
x = xm1 + 1.0L;
/* Test for domain errors. */
if (x > maxlog)
return (big * big);
/* Test for NaN input. */
u.value = xm1;
ix = u.parts32.w0 & 0x7fffffff;
if ((ix >= 0x7fff0000)
&& (((ix & 0xffff) | u.parts32.w1 | u.parts32.w2 | u.parts32.w3) != 0))
return x;
if (x <= 0.0L)
{
if (x == 0.0L)
return (-big * big);
else
return (zero / zero);
}
/* Separate mantissa from exponent. */
/* Use frexp used so that denormal numbers will be handled properly. */
x = frexpl (x, &e);
/* Logarithm using log(x) = z + z^3 P(z^2)/Q(z^2),
where z = 2(x-1)/x+1). */
if ((e > 2) || (e < -2))
{
if (x < sqrth)
{ /* 2( 2x-1 )/( 2x+1 ) */
e -= 1;
z = x - 0.5L;
y = 0.5L * z + 0.5L;
}
else
{ /* 2 (x-1)/(x+1) */
z = x - 0.5L;
z -= 0.5L;
y = 0.5L * x + 0.5L;
}
x = z / y;
z = x * x;
r = ((((R5 * z
+ R4) * z
+ R3) * z
+ R2) * z
+ R1) * z
+ R0;
s = (((((z
+ S5) * z
+ S4) * z
+ S3) * z
+ S2) * z
+ S1) * z
+ S0;
z = x * (z * r / s);
z = z + e * C2;
z = z + x;
z = z + e * C1;
return (z);
}
/* Logarithm using log(1+x) = x - .5x^2 + x^3 P(x)/Q(x). */
if (x < sqrth)
{
e -= 1;
if (e != 0)
x = 2.0L * x - 1.0L; /* 2x - 1 */
else
x = xm1;
}
else
{
if (e != 0)
x = x - 1.0L;
else
x = xm1;
}
z = x * x;
r = (((((((((((P12 * x
+ P11) * x
+ P10) * x
+ P9) * x
+ P8) * x
+ P7) * x
+ P6) * x
+ P5) * x
+ P4) * x
+ P3) * x
+ P2) * x
+ P1) * x
+ P0;
s = (((((((((((x
+ Q11) * x
+ Q10) * x
+ Q9) * x
+ Q8) * x
+ Q7) * x
+ Q6) * x
+ Q5) * x
+ Q4) * x
+ Q3) * x
+ Q2) * x
+ Q1) * x
+ Q0;
y = x * (z * r / s);
y = y + e * C2;
z = y - 0.5L * z;
z = z + x;
z = z + e * C1;
return (z);
}
weak_alias (__log1pl, log1pl)
#ifdef NO_LONG_DOUBLE
strong_alias (__log1p, __log1pl)
weak_alias (__log1p, log1pl)
#endif

2
sysdeps/s390/s390-32/backtrace.c
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@ -71,7 +71,7 @@ __backtrace (array, size)
out of range. */
break;
array[cnt++] = stack->save_grps[9];
array[cnt++] = stack->save_grps[8];
stack = (struct layout *) stack->back_chain;
}

3
sysdeps/s390/s390-64/backtrace.c
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@ -70,7 +70,7 @@ __backtrace (array, size)
out of range. */
break;
array[cnt++] = stack->save_grps[9];
array[cnt++] = stack->save_grps[8];
stack = (struct layout *) stack->back_chain;
}
@ -78,4 +78,3 @@ __backtrace (array, size)
return cnt;
}
weak_alias (__backtrace, backtrace)

7
sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h
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@ -1,4 +1,4 @@
/* Copyright (C) 1996, 1997, 1998,2000 Free Software Foundation, Inc.
/* Copyright (C) 1996, 1997, 1998, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jes Sorensen <jes@linuxcare.com>, July 2000
@ -21,6 +21,9 @@
# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
#endif
#ifndef _BITS_SIGCONTEXT_H
#define _BITS_SIGCONTEXT_H 1
#include <asm/fpu.h>
#include <bits/sigstack.h>
@ -50,3 +53,5 @@ struct sigcontext
* include the kernel headers here. */
unsigned long int sc_mask; /* signal mask to restore after handler returns */
};
#endif _BITS_SIGCONTEXT_H

2
sysdeps/unix/sysv/linux/ia64/sys/ucontext.h
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@ -22,7 +22,7 @@
#include <features.h>
#include <signal.h>
#include <bits/sigstack.h>
#include <bits/sigcontext.h>
/*
* These are here mostly for backwards compatibility with older Unices.