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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.
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/* w_gammaf.c -- float version of w_gamma.c.
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* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@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: w_gammaf.c,v 1.4 1995/11/20 22:06:48 jtc Exp $";
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#endif
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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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float __gammaf(float x)
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#else
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float __gammaf(x)
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float x;
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#endif
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{
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float 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_lgammaf_r(x,&signgam);
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if(!__finitef(y)&&__finitef(x)) {
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if(__floorf(x)==x&&x<=(float)0.0)
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/* lgammaf pole */
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return (float)__kernel_standard((double)x,(double)x,115);
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else
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/* lgammaf overflow */
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return (float)__kernel_standard((double)x,(double)x,114);
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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_gammaf_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(!__finitef(y)&&__finitef(x)) {
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if(__floorf(x)==x&&x<=(float)0.0)
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/* gammaf pole */
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return (float)__kernel_standard((double)x,(double)x,141);
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else
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/* gammaf overflow */
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return (float)__kernel_standard((double)x,(double)x,140);
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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 (__gammaf, gammaf)
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