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* sysdeps/libm-ieee754/e_gamma_r.c: Initialize *signgamp for NaN returns. * sysdeps/libm-ieee754/e_gammaf_r.c: Likewise. * sysdeps/libm-ieee754/e_gammal_r.c: Likewise. Reported by John Reiser <jreiser@BitWagon.com> [PR libc/1185]. * elf/dl-dst.h: Fix typo. * elf/dl-open.c: Likewise. 1999-06-26 Zack Weinberg <zack@rabi.columbia.edu> * elf/dl-libc.c: New file, provides three functions: __libc_dlopen, __libc_dlclose, __libc_dlsym. * include/dlfcn.h: Prototype them. Prototype _dl_addr. * elf/Makefile (routines): Add dl-libc.c. * elf/dl-profstub.c (_dl_mcount_wrapper): Change type of argument to void *. * elf/ldsodefs.h: Change proto and use of _dl_mcount_wrapper to match. * iconv/gconv.c: Include dlfcn.h. * iconv/gconv_db.c: Likewise. * malloc/mtrace.c: Likewise. Don't include ldsodefs.h. * iconv/gconv_int.h (struct __gconv_loaded_object): Change `handle' to a void *. (__gconv_find_func): Delete prototype. * iconv/gconv_dl.c: Don't include ldsodefs.h. Remove dlerror_run and related functions and structs. Use __libc_dlopen, __libc_dlsym, __libc_dlclose. * nss/nsswitch.c: Likewise. 1999-06-28 Ulrich Drepper <drepper@cygnus.com>
51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
/* Implementation of gamma function according to ISO C.
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Copyright (C) 1997, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <math.h>
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#include <math_private.h>
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long double
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__ieee754_gammal_r (long double x, int *signgamp)
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{
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/* We don't have a real gamma implementation now. We'll use lgamma
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and the exp function. But due to the required boundary
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conditions we must check some values separately. */
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u_int32_t es, hx, lx;
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GET_LDOUBLE_WORDS (es, hx, lx, x);
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if (((es & 0x7fff) | hx | lx) == 0)
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{
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/* Return value for x == 0 is NaN with invalid exception. */
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*signgamp = 0;
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return x / x;
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}
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if ((hx & 0x8000) != 0 && (hx & 0x7fff) != 0x7fff && __rintl (x) == x)
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{
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/* Return value for integer x < 0 is NaN with invalid exception. */
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*signgamp = 0;
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return (x - x) / (x - x);
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}
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/* XXX FIXME. */
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return __ieee754_expl (__ieee754_lgammal_r (x, signgamp));
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}
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