1 /* w_acosf.c -- float version of w_acos.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 #if defined(LIBM_SCCS) && !defined(lint) 17 static char rcsid[] = "$Id: w_acosf.c,v 1.2 1994/09/22 16:45:19 jtc Exp $"; 18 #endif 19 20 /* 21 * wrap_acosf(x) 22 */ 23 24 #include "math.h" 25 #include "math_private.h" 26 27 28 #ifdef __STDC__ 29 float acosf(float x) /* wrapper acosf */ 30 #else 31 float acosf(x) /* wrapper acosf */ 32 float x; 33 #endif 34 { 35 #ifdef _IEEE_LIBM 36 return __ieee754_acosf(x); 37 #else 38 float z; 39 z = __ieee754_acosf(x); 40 if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z; 41 if(fabsf(x)>(float)1.0) { 42 /* acosf(|x|>1) */ 43 return (float)__kernel_standard((double)x,(double)x,101); 44 } else 45 return z; 46 #endif 47 } 48