1 /* wf_cosh.c -- float version of w_cosh.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  * wrapper coshf(x)
18  */
19 
20 #include "fdlibm.h"
21 #include <errno.h>
22 
23 #ifdef __STDC__
coshf(float x)24 	float coshf(float x)		/* wrapper coshf */
25 #else
26 	float coshf(x)			/* wrapper coshf */
27 	float x;
28 #endif
29 {
30 #ifdef _IEEE_LIBM
31 	return __ieee754_coshf(x);
32 #else
33 	float z;
34 	struct exception exc;
35 	z = __ieee754_coshf(x);
36 	if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
37 	if(fabsf(x)>(float)8.9415985107e+01) {
38 	    /* coshf(finite) overflow */
39 #ifndef HUGE_VAL
40 #define HUGE_VAL inf
41 	    double inf = 0.0;
42 
43 	    SET_HIGH_WORD(inf,0x7ff00000);	/* set inf to infinite */
44 #endif
45 	    exc.type = OVERFLOW;
46 	    exc.name = "coshf";
47 	    exc.err = 0;
48 	    exc.arg1 = exc.arg2 = (double)x;
49 	    if (_LIB_VERSION == _SVID_)
50 	       exc.retval = HUGE;
51 	    else
52 	       exc.retval = HUGE_VAL;
53 	    if (_LIB_VERSION == _POSIX_)
54 	       errno = ERANGE;
55 	    else if (!matherr(&exc)) {
56 	       errno = ERANGE;
57 	    }
58 	    if (exc.err != 0)
59 	       errno = exc.err;
60 	    return (float)exc.retval;
61 	} else
62 	    return z;
63 #endif
64 }
65 
66 #ifdef _DOUBLE_IS_32BITS
67 
68 #ifdef __STDC__
cosh(double x)69 	double cosh(double x)
70 #else
71 	double cosh(x)
72 	double x;
73 #endif
74 {
75 	return (double) coshf((float) x);
76 }
77 
78 #endif /* defined(_DOUBLE_IS_32BITS) */
79