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Fix Bessel function spurious overflows for ldbl-128 / ldbl-128ibm (bug 15285).

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This commit is contained in:
Joseph Myers 2013-03-21 13:57:21 +00:00
parent 3775a8bc2d
commit 98c48fe5cc
6 changed files with 62 additions and 21 deletions
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17
ChangeLog
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@ -1,3 +1,20 @@
2013-03-21 Joseph Myers <joseph@codesourcery.com>
[BZ #15285]
* sysdeps/ieee754/ldbl-128/e_j0l.c: Include <float.h>.
(__ieee754_j0l): Do not improve calculations using cos of twice
input for inputs above LDBL_MAX / 2.0L.
(__ieee754_y0l): Likewise.
* sysdeps/ieee754/ldbl-128/e_j1l.c: Include <float.h>.
(__ieee754_j1l): Do not improve calculations using cos of twice
input for inputs above LDBL_MAX / 2.0L.
(__ieee754_y1l): Likewise.
* math/libm-test.inc (j0_test): Add another test.
(j1_test): Likewise.
(y0_test): Likewise.
(y1_test): Likewise.
* sysdeps/i386/fpu/libm-test-ulps: Update.
2013-03-21 Siddhesh Poyarekar <siddhesh@redhat.com>
* Rules ($(objpfx)bench-%.c): Include code from a C source

2
NEWS
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@ -12,7 +12,7 @@ Version 2.18
11561, 12723, 13550, 13951, 14142, 14176, 14200, 14317, 14327, 14496,
14812, 14920, 14964, 14981, 14982, 14985, 14994, 14996, 15003, 15006,
15020, 15023, 15036, 15054, 15055, 15062, 15078, 15160, 15232, 15234,
15283, 15287.
15283, 15285, 15287.
* Add support for calling C++11 thread_local object destructors on thread
and program exit. This needs compiler support for offloading C++11

4
math/libm-test.inc
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@ -6499,6 +6499,7 @@ j0_test (void)
#ifndef TEST_FLOAT
TEST_f_f (j0, -0x1.001000001p+593L, -3.927269966354206207832593635798954916263e-90L);
TEST_f_f (j0, 0x1p1023L, -1.5665258060609012834424478437196679802783e-155L);
#endif
#if defined TEST_LDOUBLE && LDBL_MAX_EXP >= 16384
@ -6545,6 +6546,7 @@ j1_test (void)
#ifndef TEST_FLOAT
TEST_f_f (j1, 0x1.ff00000000002p+840L, 1.846591691699331493194965158699937660696e-127L);
TEST_f_f (j1, 0x1p1023L, 8.2687542933709649327986678723012001545638e-155L);
#endif
#if defined TEST_LDOUBLE && LDBL_MAX_EXP >= 16384
@ -10721,6 +10723,7 @@ y0_test (void)
#ifndef TEST_FLOAT
TEST_f_f (y0, 0x1.ff00000000002p+840L, 1.846591691699331493194965158699937660696e-127L);
TEST_f_f (y0, 0x1p1023L, 8.2687542933709649327986678723012001545638e-155L);
#endif
#if defined TEST_LDOUBLE && LDBL_MAX_EXP >= 16384
@ -10779,6 +10782,7 @@ y1_test (void)
#ifndef TEST_FLOAT
TEST_f_f (y1, 0x1.001000001p+593L, 3.927269966354206207832593635798954916263e-90L);
TEST_f_f (y1, 0x1p1023L, 1.5665258060609012834424478437196679802783e-155L);
#endif
#if defined TEST_LDOUBLE && LDBL_MAX_EXP >= 16384

6
sysdeps/i386/fpu/libm-test-ulps
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@ -3153,6 +3153,9 @@ ldouble: 2
Test "j0 (0x1.d7ce3ap+107) == 2.775523647291230802651040996274861694514e-17":
float: 1
ifloat: 1
Test "j0 (0x1p1023) == -1.5665258060609012834424478437196679802783e-155":
double: 1
idouble: 1
Test "j0 (0x1p16382) == -1.2193782500509000574176799046642541129387e-2466":
ildouble: 1
ldouble: 1
@ -4016,6 +4019,9 @@ ldouble: 1
Test "y1 (0x1p-10) == -6.5190099301063115047395187618929589514382e+02":
float: 1
ifloat: 1
Test "y1 (0x1p1023) == 1.5665258060609012834424478437196679802783e-155":
double: 1
idouble: 1
Test "y1 (0x1p16382) == 1.2193782500509000574176799046642541129387e-2466":
ildouble: 1
ldouble: 1

27
sysdeps/ieee754/ldbl-128/e_j0l.c
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@ -93,6 +93,7 @@
#include <math.h>
#include <math_private.h>
#include <float.h>
/* 1 / sqrt(pi) */
static const long double ONEOSQPI = 5.6418958354775628694807945156077258584405E-1L;
@ -710,11 +711,14 @@ __ieee754_j0l (long double x)
__sincosl (xx, &s, &c);
ss = s - c;
cc = s + c;
z = -__cosl (xx + xx);
if ((s * c) < 0)
cc = z / ss;
else
ss = z / cc;
if (xx <= LDBL_MAX / 2.0L)
{
z = -__cosl (xx + xx);
if ((s * c) < 0)
cc = z / ss;
else
ss = z / cc;
}
if (xx > 0x1p256L)
return ONEOSQPI * cc / __ieee754_sqrtl (xx);
@ -857,11 +861,14 @@ long double
__sincosl (x, &s, &c);
ss = s - c;
cc = s + c;
z = -__cosl (x + x);
if ((s * c) < 0)
cc = z / ss;
else
ss = z / cc;
if (xx <= LDBL_MAX / 2.0L)
{
z = -__cosl (x + x);
if ((s * c) < 0)
cc = z / ss;
else
ss = z / cc;
}
if (xx > 0x1p256L)
return ONEOSQPI * ss / __ieee754_sqrtl (x);

27
sysdeps/ieee754/ldbl-128/e_j1l.c
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@ -97,6 +97,7 @@
#include <math.h>
#include <math_private.h>
#include <float.h>
/* 1 / sqrt(pi) */
static const long double ONEOSQPI = 5.6418958354775628694807945156077258584405E-1L;
@ -715,11 +716,14 @@ __ieee754_j1l (long double x)
__sincosl (xx, &s, &c);
ss = -s - c;
cc = s - c;
z = __cosl (xx + xx);
if ((s * c) > 0)
cc = z / ss;
else
ss = z / cc;
if (xx <= LDBL_MAX / 2.0L)
{
z = __cosl (xx + xx);
if ((s * c) > 0)
cc = z / ss;
else
ss = z / cc;
}
if (xx > 0x1p256L)
{
@ -868,11 +872,14 @@ __ieee754_y1l (long double x)
__sincosl (xx, &s, &c);
ss = -s - c;
cc = s - c;
z = __cosl (xx + xx);
if ((s * c) > 0)
cc = z / ss;
else
ss = z / cc;
if (xx <= LDBL_MAX / 2.0L)
{
z = __cosl (xx + xx);
if ((s * c) > 0)
cc = z / ss;
else
ss = z / cc;
}
if (xx > 0x1p256L)
return ONEOSQPI * ss / __ieee754_sqrtl (xx);