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/* $OpenBSD: e_tgammal.c,v 1.1 2011/07/06 00:02:42 martynas Exp $ */
/*
* Copyright (c) 2011 Martynas Venckus <martynas@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <math.h>
#include "math_private.h"
long double
tgammal(long double x)
{
int64_t i0,i1;
GET_LDOUBLE_WORDS64(i0,i1,x);
if (((i0&0x7fffffffffffffffLL)|i1) == 0) {
signgam = 0;
return (1.0/x);
}
if (i0<0 && (u_int64_t)i0<0xffff000000000000ULL && rintl(x)==x) {
signgam = 0;
return (x-x)/(x-x);
}
if (i0==0xffff000000000000ULL && i1==0) {
signgam = 0;
return (x-x);
}
return expl(lgammal(x));
}
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