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#if defined(LIBM_SCCS) && !defined(lint)
17static char rcsid[] = "$NetBSD: s_ceilf.c,v 1.4 1995/05/10 20:46:55 jtc Exp $";
18#endif
19
20#include "math.h"
21#include "math_private.h"
22
23#ifdef __STDC__
24static const float huge = 1.0e30;
25#else
26static float huge = 1.0e30;
27#endif
28
29#ifdef __STDC__
30	float __ceilf(float x)
31#else
32	float __ceilf(x)
33	float x;
34#endif
35{
36	int32_t i0,j0;
37	u_int32_t i;
38
39	GET_FLOAT_WORD(i0,x);
40	j0 = ((i0>>23)&0xff)-0x7f;
41	if(j0<23) {
42	    if(j0<0) { 	/* raise inexact if x != 0 */
43		if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */
44		    if(i0<0) {i0=0x80000000;}
45		    else if(i0!=0) { i0=0x3f800000;}
46		}
47	    } else {
48		i = (0x007fffff)>>j0;
49		if((i0&i)==0) return x; /* x is integral */
50		if(huge+x>(float)0.0) {	/* raise inexact flag */
51		    if(i0>0) i0 += (0x00800000)>>j0;
52		    i0 &= (~i);
53		}
54	    }
55	} else {
56	    if(j0==0x80) return x+x;	/* inf or NaN */
57	    else return x;		/* x is integral */
58	}
59	SET_FLOAT_WORD(x,i0);
60	return x;
61}
62weak_alias (__ceilf, ceilf)
63