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-rw-r--r--ChangeLog21
-rw-r--r--math/libm-test.inc4
-rw-r--r--sysdeps/generic/w_tgamma.c6
-rw-r--r--sysdeps/generic/w_tgammaf.c5
-rw-r--r--sysdeps/generic/w_tgammal.c6
-rw-r--r--sysdeps/ieee754/dbl-64/e_gamma_r.c6
-rw-r--r--sysdeps/ieee754/flt-32/e_gammaf_r.c6
-rw-r--r--sysdeps/ieee754/k_standard.c23
-rw-r--r--sysdeps/ieee754/ldbl-128/e_gammal_r.c6
-rw-r--r--sysdeps/ieee754/ldbl-96/e_gammal_r.c6
10 files changed, 67 insertions, 22 deletions
diff --git a/ChangeLog b/ChangeLog
index e250e347b6..96f60734e0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,24 @@
+2004-11-20 Jakub Jelinek <jakub@redhat.com>
+
+ * sysdeps/ieee754/k_standard.c: Document code 50.
+ (__kernel_standard) <case 50>: Avoid raising div-by-zero
+ exception again.
+
+2004-11-19 H.J. Lu <hongjiu.lu@intel.com>
+
+ [BZ #552]
+ * math/libm-test.inc (tgamma_test): Update tgamma (0) and
+ tgamma (-0).
+ * sysdeps/generic/w_tgamma.c (__tgamma): Properly handle |x| == 0.
+ * sysdeps/generic/w_tgammaf.c (__tgammaf): Likewise.
+ * sysdeps/generic/w_tgammal.c (__tgammal): Likewise.
+ * sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r): Likewise.
+ * sysdeps/ieee754/flt-32/e_gammaf_r.c: Likewise.
+ * sysdeps/ieee754/ldbl-128/e_gammal_r.c: Likewise.
+ * sysdeps/ieee754/ldbl-96/e_gammal_r.c: Likewise.
+ * sysdeps/ieee754/k_standard.c (__kernel_standard): Handle
+ tgamma (0) and tgamma (-0).
+
2004-11-20 Ulrich Drepper <drepper@redhat.com>
* time/tzfile.c (__tzfile_read): Avoid open for checking whether
diff --git a/math/libm-test.inc b/math/libm-test.inc
index b23ec8430f..77950e529a 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -4132,8 +4132,8 @@ tgamma_test (void)
START (tgamma);
TEST_f_f (tgamma, plus_infty, plus_infty);
- TEST_f_f (tgamma, 0, nan_value, INVALID_EXCEPTION);
- TEST_f_f (tgamma, minus_zero, nan_value, INVALID_EXCEPTION);
+ TEST_f_f (tgamma, 0, plus_infty, DIVIDE_BY_ZERO_EXCEPTION);
+ TEST_f_f (tgamma, minus_zero, minus_infty, DIVIDE_BY_ZERO_EXCEPTION);
/* tgamma (x) == NaN plus invalid exception for integer x <= 0. */
TEST_f_f (tgamma, -2, nan_value, INVALID_EXCEPTION);
TEST_f_f (tgamma, minus_infty, nan_value, INVALID_EXCEPTION);
diff --git a/sysdeps/generic/w_tgamma.c b/sysdeps/generic/w_tgamma.c
index 2adbc2e14d..6e34b62be4 100644
--- a/sysdeps/generic/w_tgamma.c
+++ b/sysdeps/generic/w_tgamma.c
@@ -39,8 +39,10 @@ static char rcsid[] = "$NetBSD: w_gamma.c,v 1.7 1995/11/20 22:06:43 jtc Exp $";
if(_LIB_VERSION == _IEEE_) return y;
if(!__finite(y)&&__finite(x)) {
- if(__floor(x)==x&&x<=0.0)
- return __kernel_standard(x,x,41); /* tgamma pole */
+ if (x == 0.0)
+ return __kernel_standard(x,x,50); /* tgamma pole */
+ else if(__floor(x)==x&&x<0.0)
+ return __kernel_standard(x,x,41); /* tgamma domain */
else
return __kernel_standard(x,x,40); /* tgamma overflow */
}
diff --git a/sysdeps/generic/w_tgammaf.c b/sysdeps/generic/w_tgammaf.c
index 152f4be156..e7b0d87ab5 100644
--- a/sysdeps/generic/w_tgammaf.c
+++ b/sysdeps/generic/w_tgammaf.c
@@ -37,8 +37,11 @@ static char rcsid[] = "$NetBSD: w_gammaf.c,v 1.4 1995/11/20 22:06:48 jtc Exp $";
if(_LIB_VERSION == _IEEE_) return y;
if(!__finitef(y)&&__finitef(x)) {
- if(__floorf(x)==x&&x<=(float)0.0)
+ if (x == (float)0.0)
/* tgammaf pole */
+ return (float)__kernel_standard((double)x,(double)x,150);
+ else if(__floorf(x)==x&&x<(float)0.0)
+ /* tgammaf domain */
return (float)__kernel_standard((double)x,(double)x,141);
else
/* tgammaf overflow */
diff --git a/sysdeps/generic/w_tgammal.c b/sysdeps/generic/w_tgammal.c
index 9efce2bb95..793fa17ac1 100644
--- a/sysdeps/generic/w_tgammal.c
+++ b/sysdeps/generic/w_tgammal.c
@@ -42,8 +42,10 @@ static char rcsid[] = "$NetBSD: $";
if(_LIB_VERSION == _IEEE_) return y;
if(!__finitel(y)&&__finitel(x)) {
- if(__floorl(x)==x&&x<=0.0)
- return __kernel_standard(x,x,241); /* tgamma pole */
+ if(x==0.0)
+ return __kernel_standard(x,x,250); /* tgamma pole */
+ else if(__floorl(x)==x&&x<0.0)
+ return __kernel_standard(x,x,241); /* tgamma domain */
else
return __kernel_standard(x,x,240); /* tgamma overflow */
}
diff --git a/sysdeps/ieee754/dbl-64/e_gamma_r.c b/sysdeps/ieee754/dbl-64/e_gamma_r.c
index 4614bcf46e..f32309350c 100644
--- a/sysdeps/ieee754/dbl-64/e_gamma_r.c
+++ b/sysdeps/ieee754/dbl-64/e_gamma_r.c
@@ -1,5 +1,5 @@
/* Implementation of gamma function according to ISO C.
- Copyright (C) 1997, 1999, 2001 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1999, 2001, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@@ -35,9 +35,9 @@ __ieee754_gamma_r (double x, int *signgamp)
if (((hx & 0x7fffffff) | lx) == 0)
{
- /* Return value for x == 0 is NaN with invalid exception. */
+ /* Return value for x == 0 is Inf with divide by zero exception. */
*signgamp = 0;
- return x / x;
+ return 1.0 / x;
}
if (hx < 0 && (u_int32_t) hx < 0xfff00000 && __rint (x) == x)
{
diff --git a/sysdeps/ieee754/flt-32/e_gammaf_r.c b/sysdeps/ieee754/flt-32/e_gammaf_r.c
index d484e0c288..926c84f368 100644
--- a/sysdeps/ieee754/flt-32/e_gammaf_r.c
+++ b/sysdeps/ieee754/flt-32/e_gammaf_r.c
@@ -1,5 +1,5 @@
/* Implementation of gamma function according to ISO C.
- Copyright (C) 1997, 1999, 2001 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1999, 2001, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@@ -34,9 +34,9 @@ __ieee754_gammaf_r (float x, int *signgamp)
if ((hx & 0x7fffffff) == 0)
{
- /* Return value for x == 0 is NaN with invalid exception. */
+ /* Return value for x == 0 is Inf with divide by zero exception. */
*signgamp = 0;
- return x / x;
+ return 1.0 / x;
}
if (hx < 0 && (u_int32_t) hx < 0xff800000 && __rintf (x) == x)
{
diff --git a/sysdeps/ieee754/k_standard.c b/sysdeps/ieee754/k_standard.c
index 6def34bc0c..d8fa2a4493 100644
--- a/sysdeps/ieee754/k_standard.c
+++ b/sysdeps/ieee754/k_standard.c
@@ -90,6 +90,7 @@ static double zero = 0.0; /* used as const */
* 47-- exp10 underflow
* 48-- log2(0)
* 49-- log2(x<0)
+ * 50-- tgamma(+-0)
*/
@@ -832,7 +833,7 @@ static double zero = 0.0; /* used as const */
case 40:
case 140:
case 240:
- /* gamma(finite) overflow */
+ /* tgamma(finite) overflow */
exc.type = OVERFLOW;
exc.name = type < 100 ? "tgamma" : (type < 200
? "tgammaf" : "tgammal");
@@ -846,7 +847,7 @@ static double zero = 0.0; /* used as const */
case 41:
case 141:
case 241:
- /* gamma(-integer) or gamma(0) */
+ /* tgamma(-integer) */
exc.type = SING;
exc.name = type < 100 ? "tgamma" : (type < 200
? "tgammaf" : "tgammal");
@@ -973,8 +974,24 @@ static double zero = 0.0; /* used as const */
__set_errno (EDOM);
}
break;
+ case 50:
+ case 150:
+ case 250:
+ /* tgamma(+-0) */
+ exc.type = SING;
+ exc.name = type < 100 ? "tgamma" : (type < 200
+ ? "tgammaf" : "tgammal");
+ exc.retval = __copysign (HUGE_VAL, x);
+ if (_LIB_VERSION == _POSIX_)
+ __set_errno (ERANGE);
+ else if (!matherr(&exc)) {
+ if (_LIB_VERSION == _SVID_)
+ (void) WRITE2("tgamma: SING error\n", 18);
+ __set_errno (ERANGE);
+ }
+ break;
- /* #### Last used is 49/149/249 ### */
+ /* #### Last used is 50/150/250 ### */
}
return exc.retval;
}
diff --git a/sysdeps/ieee754/ldbl-128/e_gammal_r.c b/sysdeps/ieee754/ldbl-128/e_gammal_r.c
index 123b559d08..36f5d45881 100644
--- a/sysdeps/ieee754/ldbl-128/e_gammal_r.c
+++ b/sysdeps/ieee754/ldbl-128/e_gammal_r.c
@@ -1,5 +1,5 @@
/* Implementation of gamma function according to ISO C.
- Copyright (C) 1997, 1999, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1999, 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and
Jakub Jelinek <jj@ultra.linux.cz, 1999.
@@ -36,9 +36,9 @@ __ieee754_gammal_r (long double x, int *signgamp)
if (((hx & 0x7fffffffffffffffLL) | lx) == 0)
{
- /* Return value for x == 0 is NaN with invalid exception. */
+ /* Return value for x == 0 is Inf with divide by zero exception. */
*signgamp = 0;
- return x / x;
+ return 1.0 / x;
}
if (hx < 0 && (u_int64_t) hx < 0xffff000000000000ULL && __rintl (x) == x)
{
diff --git a/sysdeps/ieee754/ldbl-96/e_gammal_r.c b/sysdeps/ieee754/ldbl-96/e_gammal_r.c
index f19a072179..dd956fed95 100644
--- a/sysdeps/ieee754/ldbl-96/e_gammal_r.c
+++ b/sysdeps/ieee754/ldbl-96/e_gammal_r.c
@@ -1,5 +1,5 @@
/* Implementation of gamma function according to ISO C.
- Copyright (C) 1997, 1999, 2001, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1999, 2001, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@@ -34,9 +34,9 @@ __ieee754_gammal_r (long double x, int *signgamp)
if (((es & 0x7fff) | hx | lx) == 0)
{
- /* Return value for x == 0 is NaN with invalid exception. */
+ /* Return value for x == 0 is Inf with divide by zero exception. */
*signgamp = 0;
- return x / x;
+ return 1.0 / x;
}
if (es == 0xffffffff && ((hx & 0x7fffffff) | lx) == 0)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 18:30:19 +0000