1 /*
2 * CDDL HEADER START
3 *
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.
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 __fegetround = fegetround
31 #pragma weak __fesetround = fesetround
32
33 #pragma weak fegetround96 = __fegetround
34
35 #include <fenv.h>
36 #include <ucontext.h>
37 #include <thread.h>
38 #include "fex_handler.h"
39 #include "fenv_inlines.h"
40
41 #if defined(__i386) && !defined(__amd64)
42 #include <float.h>
43 #endif
44
fegetround(void)45 int fegetround(void)
46 {
47 unsigned long fsr;
48
49 __fenv_getfsr(&fsr);
50 return (int)__fenv_get_rd(fsr);
51 }
52
fesetround(int r)53 int fesetround(int r)
54 {
55 unsigned long fsr;
56
57 if (r & ~3)
58 return -1;
59 __fenv_getfsr(&fsr);
60 __fenv_set_rd(fsr, r);
61 __fenv_setfsr(&fsr);
62 #if defined(__i386) && !defined(__amd64)
63 FLT_ROUNDS = (0x2D >> (r << 1)) & 3; /* 0->1, 1->3, 2->2, 3->0 */
64 #endif
65 return 0;
66 }
67
fesetround96(int r)68 int fesetround96(int r)
69 {
70 unsigned long fsr;
71
72 if (r & ~3)
73 return 0;
74 __fenv_getfsr(&fsr);
75 __fenv_set_rd(fsr, r);
76 __fenv_setfsr(&fsr);
77 #if defined(__i386) && !defined(__amd64)
78 FLT_ROUNDS = (0x2D >> (r << 1)) & 3; /* 0->1, 1->3, 2->2, 3->0 */
79 #endif
80 return 1;
81 }
82