1 /* w_gammaf.c -- float version of w_gamma.c. 2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. 3 */ 4 5 /* 6 * ==================================================== 7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 8 * 9 * Developed at SunPro, a Sun Microsystems, Inc. business. 10 * Permission to use, copy, modify, and distribute this 11 * software is freely granted, provided that this notice 12 * is preserved. 13 * ==================================================== 14 */ 15 16 #include <sys/cdefs.h> 17 #if defined(LIBM_SCCS) && !defined(lint) 18 __RCSID("$NetBSD: w_gammaf.c,v 1.8 2002/05/26 22:02:01 wiz Exp $"); 19 #endif 20 21 #include "math.h" 22 #include "math_private.h" 23 24 float 25 gammaf(float x) 26 { 27 #ifdef _IEEE_LIBM 28 return __ieee754_lgammaf_r(x,&signgam); 29 #else 30 float y; 31 y = __ieee754_lgammaf_r(x,&signgam); 32 if(_LIB_VERSION == _IEEE_) return y; 33 if(!finitef(y)&&finitef(x)) { 34 if(floorf(x)==x&&x<=(float)0.0) 35 /* gammaf pole */ 36 return (float)__kernel_standard((double)x,(double)x,141); 37 else 38 /* gammaf overflow */ 39 return (float)__kernel_standard((double)x,(double)x,140); 40 } else 41 return y; 42 #endif 43 } 44