1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/*
* Misc Sparc helpers
*
* Copyright (c) 2003-2005 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "cpu.h"
#include "host-utils.h"
#include "helper.h"
#include "sysemu.h"
void helper_raise_exception(CPUState *env, int tt)
{
env->exception_index = tt;
cpu_loop_exit(env);
}
void helper_debug(CPUState *env)
{
env->exception_index = EXCP_DEBUG;
cpu_loop_exit(env);
}
void helper_shutdown(void)
{
#if !defined(CONFIG_USER_ONLY)
qemu_system_shutdown_request();
#endif
}
#ifdef TARGET_SPARC64
target_ulong helper_popc(target_ulong val)
{
return ctpop64(val);
}
void helper_tick_set_count(void *opaque, uint64_t count)
{
#if !defined(CONFIG_USER_ONLY)
cpu_tick_set_count(opaque, count);
#endif
}
uint64_t helper_tick_get_count(void *opaque)
{
#if !defined(CONFIG_USER_ONLY)
return cpu_tick_get_count(opaque);
#else
return 0;
#endif
}
void helper_tick_set_limit(void *opaque, uint64_t limit)
{
#if !defined(CONFIG_USER_ONLY)
cpu_tick_set_limit(opaque, limit);
#endif
}
#endif
static target_ulong helper_udiv_common(CPUState *env, target_ulong a,
target_ulong b, int cc)
{
int overflow = 0;
uint64_t x0;
uint32_t x1;
x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32);
x1 = (b & 0xffffffff);
if (x1 == 0) {
helper_raise_exception(env, TT_DIV_ZERO);
}
x0 = x0 / x1;
if (x0 > 0xffffffff) {
x0 = 0xffffffff;
overflow = 1;
}
if (cc) {
env->cc_dst = x0;
env->cc_src2 = overflow;
env->cc_op = CC_OP_DIV;
}
return x0;
}
target_ulong helper_udiv(CPUState *env, target_ulong a, target_ulong b)
{
return helper_udiv_common(env, a, b, 0);
}
target_ulong helper_udiv_cc(CPUState *env, target_ulong a, target_ulong b)
{
return helper_udiv_common(env, a, b, 1);
}
static target_ulong helper_sdiv_common(CPUState *env, target_ulong a,
target_ulong b, int cc)
{
int overflow = 0;
int64_t x0;
int32_t x1;
x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32);
x1 = (b & 0xffffffff);
if (x1 == 0) {
helper_raise_exception(env, TT_DIV_ZERO);
}
x0 = x0 / x1;
if ((int32_t) x0 != x0) {
x0 = x0 < 0 ? 0x80000000 : 0x7fffffff;
overflow = 1;
}
if (cc) {
env->cc_dst = x0;
env->cc_src2 = overflow;
env->cc_op = CC_OP_DIV;
}
return x0;
}
target_ulong helper_sdiv(CPUState *env, target_ulong a, target_ulong b)
{
return helper_sdiv_common(env, a, b, 0);
}
target_ulong helper_sdiv_cc(CPUState *env, target_ulong a, target_ulong b)
{
return helper_sdiv_common(env, a, b, 1);
}
|
