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[glibc/history.git] / math / w_acoshf.c
blob62f94b80e7a10f66181ce5f384f709aaad3adf18
1 /* w_acoshf.c -- float version of w_acosh.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
5 /*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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 * ====================================================
17 #if defined(LIBM_SCCS) && !defined(lint)
18 static char rcsid[] = "$NetBSD: w_acoshf.c,v 1.3 1995/05/10 20:48:33 jtc Exp $";
19 #endif
21 /*
22 * wrapper acoshf(x)
25 #include <math.h>
26 #include "math_private.h"
28 #ifdef __STDC__
29 float __acoshf(float x) /* wrapper acoshf */
30 #else
31 float __acoshf(x) /* wrapper acoshf */
32 float x;
33 #endif
35 #ifdef _IEEE_LIBM
36 return __ieee754_acoshf(x);
37 #else
38 float z;
39 z = __ieee754_acoshf(x);
40 if(_LIB_VERSION == _IEEE_ || __isnanf(x)) return z;
41 if(x<(float)1.0) {
42 /* acosh(x<1) */
43 return (float)__kernel_standard((double)x,(double)x,129);
44 } else
45 return z;
46 #endif
48 weak_alias (__acoshf, acoshf)