diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2007-10-06 18:37:30 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2007-10-06 18:37:30 +0000 |
| commit | c039eedd66aff3706fede2188d920e173543b8e8 (patch) | |
| tree | 7caae3bc57aa7ff2781e7e32c4dc4c8925ad096a | |
| parent | 718946816cf60374f9d8f674d3ed649fdb33205a (diff) | |
[BZ #4407]
* sysdeps/ieee754/dbl-64/e_lgamma_r.c: Fix *signgamp for -0.0.
* sysdeps/ieee754/flt-32/e_lgammaf_r.c: Likewise.
* sysdeps/ieee754/ldbl-96/e_lgammal_r.c: Likewise.
* math/libm-test.inc: Add test for this case.
Half the patch by Christian Iseli <christian.iseli@licr.org>.
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | math/libm-test.inc | 5 | ||||
| -rw-r--r-- | sysdeps/ieee754/dbl-64/e_lgamma_r.c | 7 | ||||
| -rw-r--r-- | sysdeps/ieee754/flt-32/e_lgammaf_r.c | 7 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/e_lgammal_r.c | 10 |
5 files changed, 30 insertions, 7 deletions
@@ -1,5 +1,11 @@ 2007-10-06 Ulrich Drepper <drepper@redhat.com> + [BZ #4407] + * sysdeps/ieee754/dbl-64/e_lgamma_r.c: Fix *signgamp for -0.0. + * sysdeps/ieee754/flt-32/e_lgammaf_r.c: Likewise. + * sysdeps/ieee754/ldbl-96/e_lgammal_r.c: Likewise. + * math/libm-test.inc: Add test for this case. + [BZ #5010] * sunrpc/svc.c (struct svc_callout): Add sc_mapped element. (svc_register): Initialize sc_mapped. Set to TRUE if call to @@ -29,7 +35,7 @@ * string/bits/string2.h (__strdup): Cast parameters to calloc to avoid warning with -Wconversion. (__strndup): Likewise. - Patch to 50% by Christian Iseli <christian.iseli@licr.org>. + Half the patch by Christian Iseli <christian.iseli@licr.org>. [BZ #5112] * nscd/connections.c (restart): Don't resync if database is diff --git a/math/libm-test.inc b/math/libm-test.inc index 81dd364f77..da68d40bb4 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -1,4 +1,4 @@ -/* Copyright (C) 1997-2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. +/* Copyright (C) 1997-2006, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>, 1997. @@ -3221,6 +3221,9 @@ lgamma_test (void) TEST_f_f (lgamma, plus_infty, plus_infty); TEST_f_f (lgamma, 0, plus_infty, DIVIDE_BY_ZERO_EXCEPTION); + check_int ("signgam for lgamma(0) == 1", signgam, 1, 0, 0, 0); + TEST_f_f (lgamma, minus_zero, plus_infty, DIVIDE_BY_ZERO_EXCEPTION); + check_int ("signgam for lgamma(-0) == -1", signgam, -1, 0, 0, 0); TEST_f_f (lgamma, nan_value, nan_value); /* lgamma (x) == +inf plus divide by zero exception for integer x <= 0. */ diff --git a/sysdeps/ieee754/dbl-64/e_lgamma_r.c b/sysdeps/ieee754/dbl-64/e_lgamma_r.c index cc44b048f4..a298a5a2a4 100644 --- a/sysdeps/ieee754/dbl-64/e_lgamma_r.c +++ b/sysdeps/ieee754/dbl-64/e_lgamma_r.c @@ -228,7 +228,12 @@ static double zero= 0.00000000000000000000e+00; *signgamp = 1; ix = hx&0x7fffffff; if(ix>=0x7ff00000) return x*x; - if((ix|lx)==0) return one/fabs(x); + if((ix|lx)==0) + { + if (hx < 0) + *signgamp = -1; + return one/fabs(x); + } if(ix<0x3b900000) { /* |x|<2**-70, return -log(|x|) */ if(hx<0) { *signgamp = -1; diff --git a/sysdeps/ieee754/flt-32/e_lgammaf_r.c b/sysdeps/ieee754/flt-32/e_lgammaf_r.c index 5ebebb77af..0ed2610085 100644 --- a/sysdeps/ieee754/flt-32/e_lgammaf_r.c +++ b/sysdeps/ieee754/flt-32/e_lgammaf_r.c @@ -164,7 +164,12 @@ static float zero= 0.0000000000e+00; *signgamp = 1; ix = hx&0x7fffffff; if(ix>=0x7f800000) return x*x; - if(ix==0) return one/fabsf(x); + if(ix==0) + { + if (hx < 0) + *signgamp = -1; + return one/fabsf(x); + } if(ix<0x1c800000) { /* |x|<2**-70, return -log(|x|) */ if(hx<0) { *signgamp = -1; diff --git a/sysdeps/ieee754/ldbl-96/e_lgammal_r.c b/sysdeps/ieee754/ldbl-96/e_lgammal_r.c index fecbee9b2a..36e336565c 100644 --- a/sysdeps/ieee754/ldbl-96/e_lgammal_r.c +++ b/sysdeps/ieee754/ldbl-96/e_lgammal_r.c @@ -11,9 +11,9 @@ /* Long double expansions are Copyright (C) 2001 Stephen L. Moshier <moshier@na-net.ornl.gov> - and are incorporated herein by permission of the author. The author + and are incorporated herein by permission of the author. The author reserves the right to distribute this material elsewhere under different - copying permissions. These modifications are distributed here under + copying permissions. These modifications are distributed here under the following terms: This library is free software; you can redistribute it and/or @@ -302,7 +302,11 @@ __ieee754_lgammal_r (x, signgamp) ix = se & 0x7fff; if ((ix | i0 | i1) == 0) - return one / fabsl (x); + { + if (se & 0x8000) + *signgamp = -1; + return one / fabsl (x); + } ix = (ix << 16) | (i0 >> 16); |