From ea38f4d89c9698895b1cf53a5946429dc1d8bbaa Mon Sep 17 00:00:00 2001 From: Sergey Cherkashin <4erkashin@list.ru> Date: Tue, 3 Oct 2017 15:26:34 +0300 Subject: math: add exception handling functionality According to standards SVID and SYSV. Modified lgamma calling in case when 'signgam' variable should not be used. Signed-off-by: Waldemar Brodkorb --- libm/w_lgamma.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 libm/w_lgamma.c (limited to 'libm/w_lgamma.c') diff --git a/libm/w_lgamma.c b/libm/w_lgamma.c new file mode 100644 index 000000000..d2fb88dcb --- /dev/null +++ b/libm/w_lgamma.c @@ -0,0 +1,37 @@ +/* @(#)w_lgamma.c 5.1 93/09/24 */ +/* + * ==================================================== + * 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. + * ==================================================== + */ + +/* double lgamma(double x) + * Return the logarithm of the Gamma function of x. + * + * Method: call __ieee754_lgamma_r + */ + +#include +#include "math_private.h" + +double +lgamma(double x) +{ + return lgamma_r(x, &signgam); +} + +libm_hidden_def(lgamma) + +/* NB: gamma function is an old name for lgamma. + * It is deprecated. + * Some C math libraries redefine it as a "true gamma", i.e., + * not a ln(|Gamma(x)|) but just Gamma(x), but standards + * introduced tgamma name for that. + */ +strong_alias(lgamma, gamma) +libm_hidden_def(gamma) \ No newline at end of file -- cgit v1.2.3