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cc60175e8c
1998-07-23 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/glob.c: Fix two problems with GLOB_DOOFFS. Reported by bwelling@anomaly.munge.com [PR libc/720]. * sysdeps/libm-ieee754/k_standard.c: Return NAN for libm not in SVID more for gamma(x) with x interger <= 0. Reported by Stephen L Moshier <moshier@mediaone.net>. * math/libm-test.c (gamma_test): Add test for gamma(-1) and gamma(0). Correct test for SVID version of gamma. * sysdeps/libm-ieee754/w_gamma.c: Use correct matherr call in SVID emulation mode. * sysdeps/libm-ieee754/w_gammaf.c: Likewise. * sysdeps/libm-ieee754/w_gammal.c: Likewise. * string/string.h: Don't use string function optimization for C++ as long as we use macros.
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/* w_gammal.c -- long double version of w_gamma.c.
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* Conversion to long double by Ulrich Drepper,
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* Cygnus Support, drepper@cygnus.com.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: $";
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#endif
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/* long double gammal(double x)
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* Return the Gamma function of x.
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*/
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#include "math.h"
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#include "math_private.h"
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#ifdef __STDC__
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long double __gammal(long double x)
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#else
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long double __gammal(x)
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long double x;
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#endif
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{
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long double y;
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#ifndef _IEEE_LIBM
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if (_LIB_VERSION == _SVID_)
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{
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y = __ieee754_lgammal_r(x,&signgam);
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if(!__finitel(y)&&__finitel(x)) {
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if(__floorl(x)==x&&x<=(long double)0.0)
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/* lgamma pole */
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return (long double)__kernel_standard((double)x,(double)x,15);
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else
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/* lgamma overflow */
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return (long double)__kernel_standard((double)x,(double)x,14);
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}
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}
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else
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{
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#endif
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int local_signgam;
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y = __ieee754_gammal_r(x,&local_signgam);
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if (local_signgam < 0) y = -y;
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#ifdef _IEEE_LIBM
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return y;
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#else
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if(_LIB_VERSION == _IEEE_) return y;
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if(!__finitel(y)&&__finitel(x)) {
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if(__floorl(x)==x&&x<=0.0)
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return __kernel_standard(x,x,241); /* gamma pole */
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else
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return __kernel_standard(x,x,240); /* gamma overflow */
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}
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}
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return y;
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#endif
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}
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weak_alias (__gammal, gammal)
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