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0ac5ae2335
libm is now somewhat integrated with gcc's -ffinite-math-only option and lots of the wrapper functions have been optimized.
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/* w_lgammal.c -- long double version of w_lgamma.c.
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* Conversion to long double by Ulrich Drepper,
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* Cygnus Support, drepper@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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/* long double lgammal(long double x)
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* Return the logarithm of the Gamma function of x.
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*
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* Method: call __ieee754_lgammal_r
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*/
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#include <math.h>
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#include <math_private.h>
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long double
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__lgammal(long double x)
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{
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int local_signgam = 0;
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long double y = __ieee754_lgammal_r(x,
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_LIB_VERSION != _ISOC_
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/* ISO C99 does not define the
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global variable. */
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? &signgam
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: &local_signgam);
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if(__builtin_expect(!__finitel(y), 0)
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&& __finitel(x) && _LIB_VERSION != _IEEE_)
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return __kernel_standard(x, x,
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__floorl(x)==x&&x<=0.0L
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? 215 /* lgamma pole */
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: 214); /* lgamma overflow */
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return y;
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}
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weak_alias (__lgammal, lgammal)
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strong_alias (__lgammal, __gammal)
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weak_alias (__gammal, gammal)
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