1/* s_ceilf.c -- float version of s_ceil.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
4
5/*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8 *
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
14 */
15
16#include <sys/cdefs.h>
17__FBSDID("$FreeBSD$");
18
19#include "math.h"
20#include "math_private.h"
21
22static const float huge = 1.0e30;
23
24float
25ceilf(float x)
26{
27	int32_t i0,j0;
28	u_int32_t i;
29
30	GET_FLOAT_WORD(i0,x);
31	j0 = ((i0>>23)&0xff)-0x7f;
32	if(j0<23) {
33	    if(j0<0) { 	/* raise inexact if x != 0 */
34		if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */
35		    if(i0<0) {i0=0x80000000;}
36		    else if(i0!=0) { i0=0x3f800000;}
37		}
38	    } else {
39		i = (0x007fffff)>>j0;
40		if((i0&i)==0) return x; /* x is integral */
41		if(huge+x>(float)0.0) {	/* raise inexact flag */
42		    if(i0>0) i0 += (0x00800000)>>j0;
43		    i0 &= (~i);
44		}
45	    }
46	} else {
47	    if(j0==0x80) return x+x;	/* inf or NaN */
48	    else return x;		/* x is integral */
49	}
50	SET_FLOAT_WORD(x,i0);
51	return x;
52}
53