/* s_ceilf.c -- float version of s_ceil.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 <sys/cdefs.h>
#if defined(LIBM_SCCS) && !defined(lint)
__RCSID("$NetBSD: s_ceilf.c,v 1.8 2008/04/25 22:21:53 christos Exp $");
#endif

#include "math.h"
#include "math_private.h"

static const float huge = 1.0e30;

float
ceilf(float x)
{
        int32_t i0,jj0;
        u_int32_t i;

        GET_FLOAT_WORD(i0,x);
        jj0 = ((i0>>23)&0xff)-0x7f;
        if(jj0<23) {
            if(jj0<0) {         /* raise inexact if x != 0 */
                if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */
                    if(i0<0) {i0=0x80000000;}
                    else if(i0!=0) { i0=0x3f800000;}
                }
            } else {
                i = (0x007fffff)>>jj0;
                if((i0&i)==0) return x; /* x is integral */
                if(huge+x>(float)0.0) { /* raise inexact flag */
                    if(i0>0) i0 += (0x00800000)>>jj0;
                    i0 &= (~i);
                }
            }
        } else {
            if(jj0==0x80) return x+x;   /* inf or NaN */
            else return x;              /* x is integral */
        }
        SET_FLOAT_WORD(x,i0);
        return x;
}