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
|
%def op_aget(load="movl", shift="4", data_offset="MIRROR_INT_ARRAY_DATA_OFFSET"):
/*
* Array get, 32 bits or less. vAA <- vBB[vCC].
*
* for: aget, aget-boolean, aget-byte, aget-char, aget-short
*
*/
/* op vAA, vBB, vCC */
movzbl 2(rPC), %eax # eax <- BB
movzbl 3(rPC), %ecx # ecx <- CC
GET_VREG %eax, %eax # eax <- vBB (array object)
GET_VREG %ecx, %ecx # ecx <- vCC (requested index)
testl %eax, %eax # null array object?
je common_errNullObject # bail if so
cmpl MIRROR_ARRAY_LENGTH_OFFSET(%eax), %ecx
jae common_errArrayIndex # index >= length, bail.
$load $data_offset(%eax,%ecx,$shift), %eax
SET_VREG %eax, rINST
ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
%def op_aget_boolean():
% op_aget(load="movzbl", shift="1", data_offset="MIRROR_BOOLEAN_ARRAY_DATA_OFFSET")
%def op_aget_byte():
% op_aget(load="movsbl", shift="1", data_offset="MIRROR_BYTE_ARRAY_DATA_OFFSET")
%def op_aget_char():
% op_aget(load="movzwl", shift="2", data_offset="MIRROR_CHAR_ARRAY_DATA_OFFSET")
%def op_aget_object():
/*
* Array object get. vAA <- vBB[vCC].
*
* for: aget-object
*/
/* op vAA, vBB, vCC */
movzbl 2(rPC), %eax # eax <- BB
movzbl 3(rPC), %ecx # ecx <- CC
GET_VREG %eax, %eax # eax <- vBB (array object)
GET_VREG %ecx, %ecx # ecs <- vCC (requested index)
EXPORT_PC
movl %eax, OUT_ARG0(%esp)
movl %ecx, OUT_ARG1(%esp)
call SYMBOL(artAGetObjectFromMterp) # (array, index)
movl rSELF, %ecx
RESTORE_IBASE_FROM_SELF %ecx
cmpl $$0, THREAD_EXCEPTION_OFFSET(%ecx)
jnz MterpException
SET_VREG_OBJECT %eax, rINST
ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
%def op_aget_short():
% op_aget(load="movswl", shift="2", data_offset="MIRROR_SHORT_ARRAY_DATA_OFFSET")
%def op_aget_wide():
/*
* Array get, 64 bits. vAA <- vBB[vCC].
*/
/* aget-wide vAA, vBB, vCC */
movzbl 2(rPC), %eax # eax <- BB
movzbl 3(rPC), %ecx # ecx <- CC
GET_VREG %eax, %eax # eax <- vBB (array object)
GET_VREG %ecx, %ecx # ecx <- vCC (requested index)
testl %eax, %eax # null array object?
je common_errNullObject # bail if so
cmpl MIRROR_ARRAY_LENGTH_OFFSET(%eax), %ecx
jae common_errArrayIndex # index >= length, bail.
leal MIRROR_WIDE_ARRAY_DATA_OFFSET(%eax,%ecx,8), %eax
movq (%eax), %xmm0 # xmm0 <- vBB[vCC]
SET_WIDE_FP_VREG %xmm0, rINST # vAA <- xmm0
ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
%def op_aput(reg="rINST", store="movl", shift="4", data_offset="MIRROR_INT_ARRAY_DATA_OFFSET"):
/*
* Array put, 32 bits or less. vBB[vCC] <- vAA.
*
* for: aput, aput-boolean, aput-byte, aput-char, aput-short
*
*/
/* op vAA, vBB, vCC */
movzbl 2(rPC), %eax # eax <- BB
movzbl 3(rPC), %ecx # ecx <- CC
GET_VREG %eax, %eax # eax <- vBB (array object)
GET_VREG %ecx, %ecx # ecx <- vCC (requested index)
testl %eax, %eax # null array object?
je common_errNullObject # bail if so
cmpl MIRROR_ARRAY_LENGTH_OFFSET(%eax), %ecx
jae common_errArrayIndex # index >= length, bail.
leal $data_offset(%eax,%ecx,$shift), %eax
GET_VREG rINST, rINST
$store $reg, (%eax)
ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
%def op_aput_boolean():
% op_aput(reg="rINSTbl", store="movb", shift="1", data_offset="MIRROR_BOOLEAN_ARRAY_DATA_OFFSET")
%def op_aput_byte():
% op_aput(reg="rINSTbl", store="movb", shift="1", data_offset="MIRROR_BYTE_ARRAY_DATA_OFFSET")
%def op_aput_char():
% op_aput(reg="rINSTw", store="movw", shift="2", data_offset="MIRROR_CHAR_ARRAY_DATA_OFFSET")
%def op_aput_object():
/*
* Store an object into an array. vBB[vCC] <- vAA.
*/
/* op vAA, vBB, vCC */
EXPORT_PC
leal OFF_FP_SHADOWFRAME(rFP), %eax
movl %eax, OUT_ARG0(%esp)
movl rPC, OUT_ARG1(%esp)
REFRESH_INST ${opnum}
movl rINST, OUT_ARG2(%esp)
call SYMBOL(MterpAputObject) # (array, index)
RESTORE_IBASE
testb %al, %al
jz MterpPossibleException
ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
%def op_aput_short():
% op_aput(reg="rINSTw", store="movw", shift="2", data_offset="MIRROR_SHORT_ARRAY_DATA_OFFSET")
%def op_aput_wide():
/*
* Array put, 64 bits. vBB[vCC] <- vAA.
*
*/
/* aput-wide vAA, vBB, vCC */
movzbl 2(rPC), %eax # eax <- BB
movzbl 3(rPC), %ecx # ecx <- CC
GET_VREG %eax, %eax # eax <- vBB (array object)
GET_VREG %ecx, %ecx # ecx <- vCC (requested index)
testl %eax, %eax # null array object?
je common_errNullObject # bail if so
cmpl MIRROR_ARRAY_LENGTH_OFFSET(%eax), %ecx
jae common_errArrayIndex # index >= length, bail.
leal MIRROR_WIDE_ARRAY_DATA_OFFSET(%eax,%ecx,8), %eax
GET_WIDE_FP_VREG %xmm0, rINST # xmm0 <- vAA
movq %xmm0, (%eax) # vBB[vCC] <- xmm0
ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
%def op_array_length():
/*
* Return the length of an array.
*/
mov rINST, %eax # eax <- BA
sarl $$4, rINST # rINST <- B
GET_VREG %ecx, rINST # ecx <- vB (object ref)
testl %ecx, %ecx # is null?
je common_errNullObject
andb $$0xf, %al # eax <- A
movl MIRROR_ARRAY_LENGTH_OFFSET(%ecx), rINST
SET_VREG rINST, %eax
ADVANCE_PC_FETCH_AND_GOTO_NEXT 1
%def op_fill_array_data():
/* fill-array-data vAA, +BBBBBBBB */
EXPORT_PC
movl 2(rPC), %ecx # ecx <- BBBBbbbb
leal (rPC,%ecx,2), %ecx # ecx <- PC + BBBBbbbb*2
GET_VREG %eax, rINST # eax <- vAA (array object)
movl %eax, OUT_ARG0(%esp)
movl %ecx, OUT_ARG1(%esp)
call SYMBOL(MterpFillArrayData) # (obj, payload)
REFRESH_IBASE
testb %al, %al # 0 means an exception is thrown
jz MterpPossibleException
ADVANCE_PC_FETCH_AND_GOTO_NEXT 3
%def op_filled_new_array(helper="MterpFilledNewArray"):
/*
* Create a new array with elements filled from registers.
*
* for: filled-new-array, filled-new-array/range
*/
/* op vB, {vD, vE, vF, vG, vA}, class@CCCC */
/* op {vCCCC..v(CCCC+AA-1)}, type@BBBB */
.extern $helper
EXPORT_PC
leal OFF_FP_SHADOWFRAME(rFP), %eax
movl %eax, OUT_ARG0(%esp)
movl rPC, OUT_ARG1(%esp)
movl rSELF, %ecx
movl %ecx, OUT_ARG2(%esp)
call SYMBOL($helper)
REFRESH_IBASE
testb %al, %al # 0 means an exception is thrown
jz MterpPossibleException
ADVANCE_PC_FETCH_AND_GOTO_NEXT 3
%def op_filled_new_array_range():
% op_filled_new_array(helper="MterpFilledNewArrayRange")
%def op_new_array():
/*
* Allocate an array of objects, specified with the array class
* and a count.
*
* The verifier guarantees that this is an array class, so we don't
* check for it here.
*/
/* new-array vA, vB, class@CCCC */
EXPORT_PC
leal OFF_FP_SHADOWFRAME(rFP), %eax
movl %eax, OUT_ARG0(%esp)
movl rPC, OUT_ARG1(%esp)
REFRESH_INST ${opnum}
movl rINST, OUT_ARG2(%esp)
movl rSELF, %ecx
movl %ecx, OUT_ARG3(%esp)
call SYMBOL(MterpNewArray)
RESTORE_IBASE
testb %al, %al # 0 means an exception is thrown
jz MterpPossibleException
ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
|
