/* s_ceill.c -- long double version of s_ceil.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

/*

 * ceill(x)

 * Return x rounded toward -inf to integral value

 * Method:

 *	Bit twiddling.

 */

#include <math.h>

#include <math_private.h>

#include <libm-alias-ldouble.h>

#include <math-use-builtins.h>

_Float128 __ceill(_Float128 x)

{

#if USE_CEILL_BUILTIN

  return __builtin_ceill (x);

#else

  /* Use generic implementation.  */

	int64_t i0,i1,j0;

	uint64_t i,j;

	GET_LDOUBLE_WORDS64(i0,i1,x);

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

	if(j0<48) {

	    if(j0<0) {

		/* return 0*sign(x) if |x|<1 */

		if(i0<0) {i0=0x8000000000000000ULL;i1=0;}

		else if((i0|i1)!=0) { i0=0x3fff000000000000ULL;i1=0;}

	    } else {

		i = (0x0000ffffffffffffULL)>>j0;

		if(((i0&i)|i1)==0) return x; /* x is integral */

		if(i0>0) i0 += (0x0001000000000000LL)>>j0;

		i0 &= (~i); i1=0;

	    }

	} else if (j0>111) {

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

	    else return x;		/* x is integral */

	} else {

	    i = -1ULL>>(j0-48);

	    if((i1&i)==0) return x;	/* x is integral */

	    if(i0>0) {

		if(j0==48) i0+=1;

		else {

		    j = i1+(1LL<<(112-j0));

		    if(j

		    i1=j;

		}

	    }

	    i1 &= (~i);

	}

	SET_LDOUBLE_WORDS64(x,i0,i1);

	return x;

#endif /* ! USE_CEILL_BUILTIN  */

}

libm_alias_ldouble (__ceil, ceil)