newlib-cygwin/newlib/libm/math/wf_asin.c

72 lines
1.4 KiB
C

/* wf_asin.c -- float version of w_asin.c.
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
*/
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*
*/
/*
* wrapper asinf(x)
*/
#include "fdlibm.h"
#include <errno.h>
#ifdef __STDC__
float asinf(float x) /* wrapper asinf */
#else
float asinf(x) /* wrapper asinf */
float x;
#endif
{
#ifdef _IEEE_LIBM
return __ieee754_asinf(x);
#else
float z;
struct exception exc;
z = __ieee754_asinf(x);
if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
if(fabsf(x)>(float)1.0) {
/* asinf(|x|>1) */
exc.type = DOMAIN;
exc.name = "asinf";
exc.err = 0;
exc.arg1 = exc.arg2 = (double)x;
exc.retval = nan("");
if(_LIB_VERSION == _POSIX_)
errno = EDOM;
else if (!matherr(&exc)) {
errno = EDOM;
}
if (exc.err != 0)
errno = exc.err;
return (float)exc.retval;
} else
return z;
#endif
}
#ifdef _DOUBLE_IS_32BITS
#ifdef __STDC__
double asin(double x)
#else
double asin(x)
double x;
#endif
{
return (double) asinf((float) x);
}
#endif /* defined(_DOUBLE_IS_32BITS) */