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 #ifndef lint 14 static char rcsid[] = "$Id: w_asin.c,v 1.3 1994/02/18 02:27:11 jtc Exp $"; 15 #endif 16 17 /* 18 * wrapper asin(x) 19 */ 20 21 22 #include <math.h> 23 24 25 #ifdef __STDC__ 26 double asin(double x) /* wrapper asin */ 27 #else 28 double asin(x) /* wrapper asin */ 29 double x; 30 #endif 31 { 32 #ifdef _IEEE_LIBM 33 return __ieee754_asin(x); 34 #else 35 double z; 36 z = __ieee754_asin(x); 37 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; 38 if(fabs(x)>1.0) { 39 return __kernel_standard(x,x,2); /* asin(|x|>1) */ 40 } else 41 return z; 42 #endif 43 } 44