4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
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.
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]
23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
26 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
27 * Use is subject to license terms.
30 #pragma weak __truncl = truncl
36 truncl(long double x
) {
45 sx
= xx
.i
[0] & 0x80000000;
46 hx
= xx
.i
[0] & ~0x80000000;
48 /* handle trivial cases */
49 if (hx
>= 0x406f0000) /* |x| >= 2^112 + ... or x is nan */
50 return (hx
>= 0x7fff0000 ? x
+ x
: x
);
54 return (sx
? -0.0L : 0.0L);
56 j
= 0x406f - (hx
>> 16); /* 1 <= j <= 112 */
58 if (j
>= 96) { /* 96 <= j <= 112 */
59 xx
.i
[0] &= ~((1 << (j
- 96)) - 1);
60 xx
.i
[1] = xx
.i
[2] = xx
.i
[3] = 0;
61 } else if (j
>= 64) { /* 64 <= j <= 95 */
62 xx
.i
[1] &= ~((1 << (j
- 64)) - 1);
63 xx
.i
[2] = xx
.i
[3] = 0;
64 } else if (j
>= 32) { /* 32 <= j <= 63 */
65 xx
.i
[2] &= ~((1 << (j
- 32)) - 1);
67 } else /* 1 <= j <= 31 */
68 xx
.i
[3] &= ~((1 << j
) - 1);
70 /* negate result if need be */
72 xx
.i
[0] |= 0x80000000;
77 truncl(long double x
) {
85 ex
= xx
.i
[2] & 0x7fff;
86 sx
= xx
.i
[2] & 0x8000;
87 if (ex
< 0x403e) { /* |x| < 2^63 */
88 if (ex
< 0x3fff) /* |x| < 1 */
89 return (sx
? -0.0L : 0.0L);
91 /* chop x at the integer bit */
93 i
= 1 << (0x401d - ex
);
94 xx
.i
[1] &= ~(i
| (i
- 1));
97 i
= 1 << (0x403d - ex
);
98 xx
.i
[0] &= ~(i
| (i
- 1));
101 } else if (ex
< 0x7fff) /* x is integral */
103 else /* inf or nan */
107 #error Unknown architecture
108 #endif /* defined(__sparc) || defined(__x86) */