newlib-cygwin/newlib/libm/math/ef_tgamma.c

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/* ef_tgamma.c -- float version of e_tgamma.c.
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* 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.
* ====================================================
*
*/
/* __ieee754_tgammaf(x)
* Float version the Gamma function. Returns gamma(x)
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*
* Method: See __ieee754_lgammaf_r
*/
#include "fdlibm.h"
#ifdef __STDC__
float __ieee754_tgammaf(float x)
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#else
float __ieee754_tgammaf(x)
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#endif
{
int signgam_local;
float y = __ieee754_expf(__ieee754_lgammaf_r(x, &signgam_local));
if (signgam_local < 0)
y = -y;
return y;
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}