/* s_rintl.c -- long double version of s_rint.c.

 * Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.

 */

/*

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

 * 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: $";

#endif

/*

 * rintl(x)

 * Return x rounded to integral value according to the prevailing

 * rounding mode.

 * Method:

 *	Using floating addition.

 * Exception:

 *	Inexact flag raised if x not equal to rintl(x).

 */

#include <math.h>

#include <math_private.h>

#include <libm-alias-ldouble.h>

#include <math-use-builtins.h>

_Float128 __rintl(_Float128 x)

{

#if USE_RINTL_BUILTIN

  return __builtin_rintl (x);

#else

  /* Use generic implementation.  */

  static const _Float128

    TWO112[2] = {

		 5.19229685853482762853049632922009600E+33L, /* 0x406F000000000000, 0 */

		 -5.19229685853482762853049632922009600E+33L  /* 0xC06F000000000000, 0 */

  };

	int64_t i0,j0,sx;

	uint64_t i1 __attribute__ ((unused));

	_Float128 w,t;

	GET_LDOUBLE_WORDS64(i0,i1,x);

	sx = (((uint64_t)i0)>>63);

	j0 = ((i0>>48)&0x7fff)-0x3fff;

	if(j0<112) {

	    if(j0<0) {

	        w = TWO112[sx]+x;

	        t = w-TWO112[sx];

		GET_LDOUBLE_MSW64(i0,t);

		SET_LDOUBLE_MSW64(t,(i0&0x7fffffffffffffffLL)|(sx<<63));

	        return t;

	    }

	} else {

	    if(j0==0x4000) return x+x;	/* inf or NaN */

	    else return x;		/* x is integral */

	}

	w = TWO112[sx]+x;

	return w-TWO112[sx];

#endif /* ! USE_RINTL_BUILTIN  */

}

libm_alias_ldouble (__rint, rint)