48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
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/* w_gammaf.c -- float version of w_gamma.c.
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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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#include <errno.h>
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#include <math.h>
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#include <math_private.h>
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#include <math-svid-compat.h>
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#include <libm-alias-float.h>
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#if LIBM_SVID_COMPAT
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float
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__tgammaf(float x)
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{
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int local_signgam;
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float y = __ieee754_gammaf_r(x,&local_signgam);
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if(__glibc_unlikely (!isfinite (y) || y == 0)
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&& (isfinite (x) || (isinf (x) && x < 0.0))
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&& _LIB_VERSION != _IEEE_) {
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if (x == (float)0.0)
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/* tgammaf pole */
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return __kernel_standard_f(x, x, 150);
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else if(floorf(x)==x&&x<0.0f)
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/* tgammaf domain */
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return __kernel_standard_f(x, x, 141);
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else if (y == 0)
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/* tgammaf underflow */
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__set_errno (ERANGE);
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else
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/* tgammaf overflow */
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return __kernel_standard_f(x, x, 140);
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}
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return local_signgam < 0 ? - y : y;
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}
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libm_alias_float (__tgamma, tgamma)
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#endif
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