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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
/**************************************************************
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*************************************************************/
/*
* Implements osl_[increment|decrement]InterlockedCount in two ways:
* sparcv8 architecture: use the "swap" instruction
* sparcv9/sparcv8plus architecture: use the "cas" instruction
*
* 32 bit mode with v8 and v8plus support:
* Initialize once with osl_InterlockedCountSetV9(int bv9) if you want to
* use the "cas" instruction, which is faster (no spinlock needed)
* Default is to use the "swap" instruction, which works on all supported
* SPARC cpu's
*
* osl_InterlockedCountSetV9(int bv9)
* bv9 = 0 use sparcv8 "swap" (spinlock)
* bv9 = 1 use sparcv9/sparcv8plus "cas" (no spinlock)
*
* 32 bit mode without v8 support (implies v8plus) or 64 bit mode:
* No need (nor the possibility) to call osl_InterlockedCountSetV9(),
* sparcv9 mode is implied. Assemble with -xarch=v8plus (32 bit) or
* -xarch=v9 (64 bit).
*
*/
#if !defined(__sparcv8plus) && !defined(__sparcv9) && !defined(__sparc_v9__)
.section ".data"
.align 4
osl_incrementInterLockCountFuncPtr:
.word osl_incrementInterlockedCountV8
.type osl_incrementInterLockCountFuncPtr,#object
.size osl_incrementInterLockCountFuncPtr,4
.align 4
osl_decrementInterLockCountFuncPtr:
.word osl_decrementInterlockedCountV8
.type osl_decrementInterLockCountFuncPtr,#object
.size osl_decrementInterLockCountFuncPtr,4
.section ".text"
#if defined(NETBSD) || defined(LINUX)
/* add the address of the calling "call" instruction (stored in %o7) to
* %o5 which contains _GLOBAL_OFFSET_TABLE_
*/
.Laddoseven:
retl
add %o7, %o5, %o5
#endif
.global osl_incrementInterlockedCount
.align 4
osl_incrementInterlockedCount:
#if defined(NETBSD) || defined(LINUX)
mov %o7, %g1
sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %o5
call .Laddoseven
add %o5, %lo(_GLOBAL_OFFSET_TABLE_+4), %o5
mov %g1, %o7
#endif
set osl_incrementInterLockCountFuncPtr, %o1
#if defined(NETBSD)
ld [%o1 + %o5], %o1
#endif
ld [%o1], %o1
jmp %o1
nop ! delay slot
.type osl_incrementInterlockedCount,#function
.size osl_incrementInterlockedCount,.-osl_incrementInterlockedCount
.section ".text"
.global osl_decrementInterlockedCount
.align 4
osl_decrementInterlockedCount:
#if defined(NETBSD) || defined(LINUX)
mov %o7, %g1
sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %o5
call .Laddoseven
add %o5, %lo(_GLOBAL_OFFSET_TABLE_+4), %o5
mov %g1, %o7
#endif
set osl_decrementInterLockCountFuncPtr, %o1
#if defined(NETBSD) || defined(LINUX)
ld [%o1 + %o5], %o1
#endif
ld [%o1], %o1
jmp %o1
nop ! delay slot
.type osl_decrementInterlockedCount,#function
.size osl_decrementInterlockedCount,.-osl_decrementInterlockedCount
.section ".text"
.global osl_InterlockedCountSetV9
.align 4
osl_InterlockedCountSetV9:
#if defined(NETBSD) || defined(LINUX)
mov %o7, %g1
sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %o5
call .Laddoseven
add %o5, %lo(_GLOBAL_OFFSET_TABLE_+4), %o5
mov %g1, %o7
#endif
set osl_incrementInterLockCountFuncPtr, %o1
set osl_decrementInterLockCountFuncPtr, %o2
cmp %o0, %g0
bnz 1f
nop ! delay slot
set osl_incrementInterlockedCountV8, %o0
set osl_decrementInterlockedCountV8, %o3
#if defined(NETBSD) || defined(LINUX)
ld [%o0 + %o5], %o0
ld [%o1 + %o5], %o1
ld [%o2 + %o5], %o2
ld [%o3 + %o5], %o3
#endif
st %o3,[%o2]
retl
st %o0,[%o1]
1: set osl_incrementInterlockedCountV9, %o0
set osl_decrementInterlockedCountV9, %o3
#if defined(NETBSD) || defined(LINUX)
ld [%o0 + %o5], %o0
ld [%o1 + %o5], %o1
ld [%o2 + %o5], %o2
ld [%o3 + %o5], %o3
#endif
st %o3,[%o2]
retl
st %o0,[%o1]
.type osl_InterlockedCountSetV9,#function
.size osl_InterlockedCountSetV9,.-osl_InterlockedCountSetV9
.section ".text"
.local osl_incrementInterlockedCountV8
.align 4
! Implements osl_[increment|decrement]InterlockedCount with sparcv8 "swap" instruction.
! Uses -4096 as lock value for spinlock to allow for small negative counts.
osl_incrementInterlockedCountV8:
1: ld [%o0], %o1
cmp %o1, -4096 ! test spinlock
be 1b
mov -4096, %o1 ! delay slot
swap [%o0], %o1
cmp %o1, -4096
be 1b
inc %o1 ! delay slot, if we got spinlock, increment count
st %o1, [%o0]
retl
mov %o1, %o0 ! delay slot
.type osl_incrementInterlockedCountV8,#function
.size osl_incrementInterlockedCountV8,.-osl_incrementInterlockedCountV8
.section ".text"
.local osl_decrementInterlockedCountV8
.align 4
osl_decrementInterlockedCountV8:
1: ld [%o0], %o1
cmp %o1, -4096 ! test spinlock
be 1b
mov -4096, %o1 ! delay slot
swap [%o0], %o1
cmp %o1, -4096
be 1b
dec %o1 ! delay slot, if we got spinlock, decrement count
st %o1, [%o0] ! delay slot
retl
mov %o1, %o0 ! delay slot
.type osl_decrementInterlockedCountV8,#function
.size osl_decrementInterlockedCountV8,.-osl_decrementInterlockedCountV8
#endif /* !__sparcv8plus && !__sparcv9 && !_sparcv9__ */
.section ".text"
#if defined(__sparcv8plus) || defined(__sparcv9) || defined(__sparc_v9__)
#define osl_incrementInterlockedCountV9 osl_incrementInterlockedCount
.global osl_incrementInterlockedCountV9
#else
.local osl_incrementInterlockedCountV9
#endif
.align 8
! Implements osl_[increment|decrement]InterlockedCount with sparcv9(sparcv8plus) "cas"
! instruction.
osl_incrementInterlockedCountV9:
1: ld [%o0], %o1
add %o1, 1, %o2
! allow linux to build for v8
.word 0xD5E21009
! cas [%o0], %o1, %o2
cmp %o1, %o2
bne 1b
nop ! delay slot
retl
add %o2, 1, %o0 ! delay slot
.type osl_incrementInterlockedCountV9,#function
.size osl_incrementInterlockedCountV9,.-osl_incrementInterlockedCountV9
.section ".text"
#if defined(__sparcv8plus) || defined(__sparcv9) || defined(__sparc_v9__)
#define osl_decrementInterlockedCountV9 osl_decrementInterlockedCount
.global osl_decrementInterlockedCountV9
#else
.local osl_decrementInterlockedCountV9
#endif
.align 8
osl_decrementInterlockedCountV9:
1: ld [%o0], %o1
sub %o1, 1, %o2
! allow linux to build for v8
.word 0xD5E21009
! cas [%o0], %o1, %o2
cmp %o1, %o2
bne 1b
nop ! delay slot
retl
sub %o2, 1, %o0 ! delay slot
.type osl_decrementInterlockedCountV9,#function
.size osl_decrementInterlockedCountV9,.-osl_decrementInterlockedCountV9
|
