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#define NO_MATH_REDIRECT
17#include <math.h>
18#include <math_private.h>
19#include <libm-alias-float.h>
20#include <math-use-builtins.h>
21
22float
23__ceilf (float x)
24{
25#if USE_CEILF_BUILTIN
26 return __builtin_ceilf (x);
27#else
28 /* Use generic implementation. */
29 int32_t i0, j0;
30 uint32_t i;
31
32 GET_FLOAT_WORD (i0, x);
33 j0 = ((i0 >> 23) & 0xff) - 0x7f;
34 if (j0 < 23)
35 {
36 if (j0 < 0)
37 {
38 /* return 0 * sign (x) if |x| < 1 */
39 if (i0 < 0)
40 i0 = 0x80000000;
41 else if (i0 != 0)
42 i0 = 0x3f800000;
43 }
44 else
45 {
46 i = (0x007fffff) >> j0;
47 if ((i0 & i) == 0)
48 return x; /* x is integral */
49 if (i0 > 0)
50 i0 += (0x00800000) >> j0;
51 i0 &= (~i);
52 }
53 }
54 else
55 {
56 if (__glibc_unlikely (j0 == 0x80))
57 return x + x; /* inf or NaN */
58 else
59 return x; /* x is integral */
60 }
61 SET_FLOAT_WORD (x, i0);
62 return x;
63#endif /* ! USE_CEILF_BUILTIN */
64}
65#ifndef __ceilf
66libm_alias_float (__ceil, ceil)
67#endif
68