1 /* wf_acos.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 /*
17  * wrap_acosf(x)
18  */
19 
20 #include "fdlibm.h"
21 #include <errno.h>
22 
23 #ifdef _HAVE_STDC
acosf(float x)24 	float acosf(float x)		/* wrapper acosf */
25 #else
26 	float acosf(x)			/* wrapper acosf */
27 	float x;
28 #endif
29 {
30 #ifdef _IEEE_LIBM
31 	return __ieee754_acosf(x);
32 #else
33 	float z;
34 	struct exception exc;
35 	z = __ieee754_acosf(x);
36 	if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
37 	if(fabsf(x)>(float)1.0) {
38 	    /* acosf(|x|>1) */
39 	    exc.type = DOMAIN;
40 	    exc.name = "acosf";
41 	    exc.err = 0;
42 	    exc.arg1 = exc.arg2 = (double)x;
43 	    exc.retval = 0.0;
44 	    if (_LIB_VERSION == _POSIX_)
45 	       errno = EDOM;
46 	    else if (!matherr(&exc)) {
47 	       errno = EDOM;
48             }
49             if (exc.err != 0)
50 	       errno = exc.err;
51 	    return (float)exc.retval;
52 	} else
53 	    return z;
54 #endif
55 }
56 
57 #ifdef _DOUBLE_IS_32BITS
58 
59 #ifdef __STDC__
acos(double x)60 	double acos(double x)
61 #else
62 	double acos(x)
63 	double x;
64 #endif
65 {
66 	return (double) acosf((float) x);
67 }
68 
69 #endif /* defined(_DOUBLE_IS_32BITS) */
70