/* e_sinhf.c -- float version of e_sinh.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.

 * ====================================================

 */

#include <float.h>

#include <math.h>

#include <math-narrow-eval.h>

#include <math_private.h>

#include <math-underflow.h>

static const float one = 1.0, shuge = 1.0e37;

float

__ieee754_sinhf(float x)

{

	float t,w,h;

	int32_t ix,jx;

	GET_FLOAT_WORD(jx,x);

	ix = jx&0x7fffffff;

    /* x is INF or NaN */

	if(__builtin_expect(ix>=0x7f800000, 0)) return x+x;

	h = 0.5;

	if (jx<0) h = -h;

    /* |x| in [0,22], return sign(x)*0.5*(E+E/(E+1))) */

	if (ix < 0x41b00000) {		/* |x|<22 */

	    if (__builtin_expect(ix<0x31800000, 0)) {	/* |x|<2**-28 */

		math_check_force_underflow (x);

		if(shuge+x>one) return x;/* sinh(tiny) = tiny with inexact */

	    }

	    t = __expm1f(fabsf(x));

	    if(ix<0x3f800000) return h*((float)2.0*t-t*t/(t+one));

	    return h*(t+t/(t+one));

	}

    /* |x| in [22, log(maxdouble)] return 0.5*exp(|x|) */

	if (ix < 0x42b17180)  return h*__ieee754_expf(fabsf(x));

    /* |x| in [log(maxdouble), overflowthresold] */

	if (ix<=0x42b2d4fc) {

	    w = __ieee754_expf((float)0.5*fabsf(x));

	    t = h*w;

	    return t*w;

	}

    /* |x| > overflowthresold, sinh(x) overflow */

	return math_narrow_eval (x*shuge);

}

strong_alias (__ieee754_sinhf, __sinhf_finite)