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- /*
- * ====================================================
- * 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 <math.h>
- #include "math_private.h"
- double lgamma(double x)
- {
- #ifdef _IEEE_LIBM
- return __ieee754_lgamma_r(x, &signgam);
- #else
- double y = __ieee754_lgamma_r(x, &signgam);
- if (_LIB_VERSION == _IEEE_)
- return y;
- if (!isfinite(y) && isfinite(x)) {
- if (floor(x) == x && x <= 0.0)
- return __kernel_standard(x, x, 15); /* lgamma pole */
- return __kernel_standard(x, x, 14); /* lgamma overflow */
- }
- return y;
- #endif
- }
- libm_hidden_def(lgamma)
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