1*05a0b428SJohn Marino /* s_ceilf.c -- float version of s_ceil.c.
2*05a0b428SJohn Marino * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3*05a0b428SJohn Marino */
4*05a0b428SJohn Marino
5*05a0b428SJohn Marino /*
6*05a0b428SJohn Marino * ====================================================
7*05a0b428SJohn Marino * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8*05a0b428SJohn Marino *
9*05a0b428SJohn Marino * Developed at SunPro, a Sun Microsystems, Inc. business.
10*05a0b428SJohn Marino * Permission to use, copy, modify, and distribute this
11*05a0b428SJohn Marino * software is freely granted, provided that this notice
12*05a0b428SJohn Marino * is preserved.
13*05a0b428SJohn Marino * ====================================================
14*05a0b428SJohn Marino */
15*05a0b428SJohn Marino
16*05a0b428SJohn Marino #include "math.h"
17*05a0b428SJohn Marino #include "math_private.h"
18*05a0b428SJohn Marino
19*05a0b428SJohn Marino static const float huge = 1.0e30;
20*05a0b428SJohn Marino
21*05a0b428SJohn Marino float
ceilf(float x)22*05a0b428SJohn Marino ceilf(float x)
23*05a0b428SJohn Marino {
24*05a0b428SJohn Marino int32_t i0,jj0;
25*05a0b428SJohn Marino u_int32_t i;
26*05a0b428SJohn Marino
27*05a0b428SJohn Marino GET_FLOAT_WORD(i0,x);
28*05a0b428SJohn Marino jj0 = ((i0>>23)&0xff)-0x7f;
29*05a0b428SJohn Marino if(jj0<23) {
30*05a0b428SJohn Marino if(jj0<0) { /* raise inexact if x != 0 */
31*05a0b428SJohn Marino if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */
32*05a0b428SJohn Marino if(i0<0) {i0=0x80000000;}
33*05a0b428SJohn Marino else if(i0!=0) { i0=0x3f800000;}
34*05a0b428SJohn Marino }
35*05a0b428SJohn Marino } else {
36*05a0b428SJohn Marino i = (0x007fffff)>>jj0;
37*05a0b428SJohn Marino if((i0&i)==0) return x; /* x is integral */
38*05a0b428SJohn Marino if(huge+x>(float)0.0) { /* raise inexact flag */
39*05a0b428SJohn Marino if(i0>0) i0 += (0x00800000)>>jj0;
40*05a0b428SJohn Marino i0 &= (~i);
41*05a0b428SJohn Marino }
42*05a0b428SJohn Marino }
43*05a0b428SJohn Marino } else {
44*05a0b428SJohn Marino if(jj0==0x80) return x+x; /* inf or NaN */
45*05a0b428SJohn Marino else return x; /* x is integral */
46*05a0b428SJohn Marino }
47*05a0b428SJohn Marino SET_FLOAT_WORD(x,i0);
48*05a0b428SJohn Marino return x;
49*05a0b428SJohn Marino }
50