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 __feclearexcept = feclearexcept
31 #pragma weak __feraiseexcept = feraiseexcept
32 #pragma weak __fetestexcept = fetestexcept
33 #pragma weak __fegetexceptflag = fegetexceptflag
34 #pragma weak __fesetexceptflag = fesetexceptflag
35
36 #pragma weak feclearexcept96 = feclearexcept
37 #pragma weak feraiseexcept96 = feraiseexcept
38 #pragma weak fetestexcept96 = fetestexcept
39 #pragma weak fegetexceptflag96 = fegetexceptflag
40 #pragma weak fesetexceptflag96 = fesetexceptflag
41
42 #include <fenv.h>
43 #include <sys/ieeefp.h>
44 #include <ucontext.h>
45 #include <thread.h>
46 #include "fex_handler.h"
47 #include "fenv_inlines.h"
48
49
feclearexcept(int e)50 int feclearexcept(int e)
51 {
52 unsigned long fsr;
53
54 __fenv_getfsr(&fsr);
55 __fenv_set_ex(fsr, __fenv_get_ex(fsr) & ~e);
56 __fenv_setfsr(&fsr);
57 if (fex_get_log())
58 __fex_update_te();
59 return 0;
60 }
61
62 /*
63 * note - __fex_hdlr depends on fetestexcept following feraiseexcept
64 */
feraiseexcept(int e)65 int feraiseexcept(int e)
66 {
67 volatile double t;
68 unsigned long fsr;
69
70 if (e & FE_INVALID) {
71 t = 0.0;
72 t /= 0.0;
73 }
74 if (e & FE_DIVBYZERO) {
75 t = 1.0e300;
76 t /= 0.0;
77 }
78 if (e & FE_OVERFLOW) {
79 /* if overflow is not trapped, avoid raising inexact */
80 __fenv_getfsr(&fsr);
81 if (!(__fenv_get_te(fsr) & (1 << fp_trap_overflow))) {
82 __fenv_set_ex(fsr, __fenv_get_ex(fsr) | FE_OVERFLOW);
83 __fenv_setfsr(&fsr);
84 }
85 else {
86 t = 1.0e300;
87 t *= 1.0e300;
88 }
89 }
90 if (e & FE_UNDERFLOW) {
91 /* if underflow is not trapped, avoid raising inexact */
92 __fenv_getfsr(&fsr);
93 if (!(__fenv_get_te(fsr) & (1 << fp_trap_underflow))) {
94 __fenv_set_ex(fsr, __fenv_get_ex(fsr) | FE_UNDERFLOW);
95 __fenv_setfsr(&fsr);
96 }
97 else {
98 t = 1.0e-307;
99 t -= 1.001e-307;
100 }
101 }
102 if (e & FE_INEXACT) {
103 t = 1.0e300;
104 t += 1.0e-307;
105 }
106 return 0;
107 }
108
fetestexcept(int e)109 int fetestexcept(int e)
110 {
111 unsigned long fsr;
112
113 __fenv_getfsr(&fsr);
114 return (int)__fenv_get_ex(fsr) & e;
115 }
116
fegetexceptflag(fexcept_t * p,int e)117 int fegetexceptflag(fexcept_t *p, int e)
118 {
119 unsigned long fsr;
120
121 __fenv_getfsr(&fsr);
122 *p = (int)__fenv_get_ex(fsr) & e;
123 return 0;
124 }
125
fesetexceptflag(const fexcept_t * p,int e)126 int fesetexceptflag(const fexcept_t *p, int e)
127 {
128 unsigned long fsr;
129
130 __fenv_getfsr(&fsr);
131 __fenv_set_ex(fsr, (((int)__fenv_get_ex(fsr) & ~e) | (*p & e)) &
132 FE_ALL_EXCEPT);
133 __fenv_setfsr(&fsr);
134 if (fex_get_log())
135 __fex_update_te();
136 return 0;
137 }
138