1 /* @(#)w_asin.c 5.1 93/09/24 */ 2 /* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13 #if defined(LIBM_SCCS) && !defined(lint) 14 static char rcsid[] = "$NetBSD: w_asin.c,v 1.6 1995/05/10 20:48:35 jtc Exp $"; 15 #endif 16 17 /* 18 * wrapper asin(x) 19 */ 20 21 22 #include "math.h" 23 #include "math_private.h" 24 25 26 #ifdef __STDC__ 27 double asin(double x) /* wrapper asin */ 28 #else 29 double asin(x) /* wrapper asin */ 30 double x; 31 #endif 32 { 33 #ifdef _IEEE_LIBM 34 return __ieee754_asin(x); 35 #else 36 double z; 37 z = __ieee754_asin(x); 38 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; 39 if(fabs(x)>1.0) { 40 return __kernel_standard(x,x,2); /* asin(|x|>1) */ 41 } else 42 return z; 43 #endif 44 } 45