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45 lines
1.2 KiB
C
45 lines
1.2 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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#include <errno.h>
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#include <math.h>
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#include <math_private.h>
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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 (!__finitef (y) || y == 0)
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&& (__finitef (x) || __isinff (x) < 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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weak_alias (__tgammaf, tgammaf)
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