mirror of git://sourceware.org/git/glibc.git
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/* @(#)w_lgamma.c 5.1 93/09/24 */
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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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/* double lgamma(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_lgamma_r
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*/
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#include <math.h>
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#include <math_private.h>
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#include <math-svid-compat.h>
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#include <libm-alias-double.h>
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#include <lgamma-compat.h>
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#if BUILD_LGAMMA
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double
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LGFUNC (__lgamma) (double x)
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{
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double y = CALL_LGAMMA (double, __ieee754_lgamma_r, x);
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if(__builtin_expect(!isfinite(y), 0)
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&& isfinite(x) && _LIB_VERSION != _IEEE_)
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return __kernel_standard(x, x,
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floor(x)==x&&x<=0.0
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? 15 /* lgamma pole */
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: 14); /* lgamma overflow */
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return y;
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}
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# if USE_AS_COMPAT
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compat_symbol (libm, __lgamma_compat, lgamma, LGAMMA_OLD_VER);
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# ifdef NO_LONG_DOUBLE
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strong_alias (__lgamma_compat, __lgammal_compat)
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compat_symbol (libm, __lgammal_compat, lgammal, LGAMMA_OLD_VER);
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# endif
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# else
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versioned_symbol (libm, __lgamma, lgamma, LGAMMA_NEW_VER);
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# ifdef NO_LONG_DOUBLE
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strong_alias (__lgamma, __lgammal)
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versioned_symbol (libm, __lgammal, lgammal, LGAMMA_NEW_VER);
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# endif
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libm_alias_double_other (__lgamma, lgamma)
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# endif
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# if GAMMA_ALIAS
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strong_alias (LGFUNC (__lgamma), __gamma)
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weak_alias (__gamma, gamma)
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# ifdef NO_LONG_DOUBLE
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strong_alias (__gamma, __gammal)
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weak_alias (__gamma, gammal)
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# endif
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# endif
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#endif
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