5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24 */
25 /*
26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
27 * Use is subject to license terms.
28 */
29
30 #pragma weak __ceilf = ceilf
31 #pragma weak __floorf = floorf
32
33 /* INDENT OFF */
34 /*
35 * ceilf(x) return the biggest integral value (in float) below x
36 * floorf(x) return the least integral value (in float) above x
37 *
38 * NOTE: ceilf(x) and floorf(x) return result
39 * with the same sign as x's, including 0.0F.
40 */
41
42 #include "libm.h"
43
44 static const float xf[] = {
45 /* ZEROF */ 0.0f,
46 /* ONEF */ 1.0f,
47 /* MONEF */ -1.0f,
48 /* HUGEF */ 1.0e30f,
49 };
50
51 #define ZEROF xf[0]
52 #define ONEF xf[1]
53 #define MONEF xf[2]
54 #define HUGEF xf[3]
55 /* INDENT ON */
56
57 float
58 ceilf(float x) {
59 volatile float dummy __unused;
60 int hx, k, j, ix;
61
62 hx = *(int *) &x;
63 ix = hx & ~0x80000000;
64 k = ix >> 23;
65 if (((k - 127) ^ (k - 150)) < 0) {
66 k = (1 << (150 - k)) - 1;
67 if ((k & hx) != 0)
68 dummy = HUGEF + x; /* raise inexact */
69 j = k & (~(hx >> 31));
70 *(int *) &x = (hx + j) & ~k;
71 return (x);
72 } else if (k <= 126) {
73 dummy = HUGEF + x;
74 if (hx > 0)
75 return (ONEF);
76 else if (ix == 0)
77 return (x);
78 else
79 return (-ZEROF);
80 } else
81 /* signal invalid if x is a SNaN */
82 return (x * ONEF); /* +0 -> *1 for Cheetah */
83 }
84
85 float
86 floorf(float x) {
87 volatile float dummy __unused;
88 int hx, k, j, ix;
89
90 hx = *(int *) &x;
91 ix = hx & ~0x80000000;
92 k = ix >> 23;
93 if (((k - 127) ^ (k - 150)) < 0) {
94 k = (1 << (150 - k)) - 1;
95 if ((k & hx) != 0)
96 dummy = HUGEF + x; /* raise inexact */
97 j = k & (hx >> 31);
98 *(int *) &x = (hx + j) & ~k;
99 return (x);
100 } else if (k <= 126) {
101 dummy = HUGEF + x;
102 if (hx > 0)
103 return (ZEROF);
104 else if (ix == 0)
105 return (x);
106 else
107 return (MONEF);
108 } else
109 /* signal invalid if x is a SNaN */
110 return (x * ONEF); /* +0 -> *1 for Cheetah */
111 }
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5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24 */
25
26 /*
27 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 #pragma weak __ceilf = ceilf
32 #pragma weak __floorf = floorf
33
34
35 /*
36 * ceilf(x) return the biggest integral value (in float) below x
37 * floorf(x) return the least integral value (in float) above x
38 *
39 * NOTE: ceilf(x) and floorf(x) return result
40 * with the same sign as x's, including 0.0F.
41 */
42
43 #include "libm.h"
44
45 static const float xf[] = {
46 /* ZEROF */
47 0.0f,
48 /* ONEF */ 1.0f,
49 /* MONEF */ -1.0f,
50 /* HUGEF */ 1.0e30f, };
51
52 #define ZEROF xf[0]
53 #define ONEF xf[1]
54 #define MONEF xf[2]
55 #define HUGEF xf[3]
56
57 float
58 ceilf(float x)
59 {
60 volatile float dummy __unused;
61 int hx, k, j, ix;
62
63 hx = *(int *)&x;
64 ix = hx & ~0x80000000;
65 k = ix >> 23;
66
67 if (((k - 127) ^ (k - 150)) < 0) {
68 k = (1 << (150 - k)) - 1;
69
70 if ((k & hx) != 0)
71 dummy = HUGEF + x; /* raise inexact */
72
73 j = k & (~(hx >> 31));
74 *(int *)&x = (hx + j) & ~k;
75 return (x);
76 } else if (k <= 126) {
77 dummy = HUGEF + x;
78
79 if (hx > 0)
80 return (ONEF);
81 else if (ix == 0)
82 return (x);
83 else
84 return (-ZEROF);
85 } else {
86 /* signal invalid if x is a SNaN */
87 return (x * ONEF); /* +0 -> *1 for Cheetah */
88 }
89 }
90
91 float
92 floorf(float x)
93 {
94 volatile float dummy __unused;
95 int hx, k, j, ix;
96
97 hx = *(int *)&x;
98 ix = hx & ~0x80000000;
99 k = ix >> 23;
100
101 if (((k - 127) ^ (k - 150)) < 0) {
102 k = (1 << (150 - k)) - 1;
103
104 if ((k & hx) != 0)
105 dummy = HUGEF + x; /* raise inexact */
106
107 j = k & (hx >> 31);
108 *(int *)&x = (hx + j) & ~k;
109 return (x);
110 } else if (k <= 126) {
111 dummy = HUGEF + x;
112
113 if (hx > 0)
114 return (ZEROF);
115 else if (ix == 0)
116 return (x);
117 else
118 return (MONEF);
119 } else {
120 /* signal invalid if x is a SNaN */
121 return (x * ONEF); /* +0 -> *1 for Cheetah */
122 }
123 }
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