/* s_frexpf.c -- float version of s_frexp.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.

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

 */

#if defined(LIBM_SCCS) && !defined(lint)

static char rcsid[] = "$NetBSD: s_frexpf.c,v 1.5 1995/05/10 20:47:26 jtc Exp $";

#endif

#include <math.h>

#include <math_private.h>

#include <libm-alias-float.h>

static const float

two25 =  3.3554432000e+07; /* 0x4c000000 */

float __frexpf(float x, int *eptr)

{

	int32_t hx,ix;

	GET_FLOAT_WORD(hx,x);

	ix = 0x7fffffff&hx;

	*eptr = 0;

	if(ix>=0x7f800000||(ix==0)) return x + x;	/* 0,inf,nan */

	if (ix<0x00800000) {		/* subnormal */

	    x *= two25;

	    GET_FLOAT_WORD(hx,x);

	    ix = hx&0x7fffffff;

	    *eptr = -25;

	}

	*eptr += (ix>>23)-126;

	hx = (hx&0x807fffff)|0x3f000000;

	SET_FLOAT_WORD(x,hx);

	return x;

}

libm_alias_float (__frexp, frexp)