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/* w_gammaf.c -- float version of w_gamma.c.
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
*/
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
#include <math.h>
#include "math_private.h"
#if __UCLIBC_HAS_FENV__
#include <errno.h>
#endif
float
tgammaf(float x)
{
#if __UCLIBC_HAS_FENV__
float y = (float) __ieee754_tgamma((double)x);
if(__builtin_expect (!isfinite (y) || y == 0, 0)
&& (isfinite (x) || (isinf (x) && x < 0.0))
&& _LIB_VERSION != _IEEE_) {
if (x == (float)0.0)
/* tgammaf pole */
return __kernel_standard_f(x, x, 150);
else if(floorf(x)==x&&x<0.0f)
/* tgammaf domain */
return __kernel_standard_f(x, x, 141);
else if (y == 0)
/* tgammaf underflow */
__set_errno (ERANGE);
else
/* tgammaf overflow */
return __kernel_standard_f(x, x, 140);
}
return y;
#else
return (float) __ieee754_tgamma((double)x);
#endif /* __UCLIBC_HAS_FENV__ */
}
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