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
|
/* Thumb-2 IT blocks test program.
Copyright 2010-2014 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
.syntax unified
.text
.p2align 2
.code 16
#ifndef __thumb2__
.type main,%function
.thumb_func
.globl main
main:
mov r0, #0
bx lr @ No Thumb-2
#else
.type main,%function
.thumb_func
.globl main
main:
mov r0, #0
bx lr @ Thumb-2 OK
@ One conditional instruction, executed.
.type it_1,%function
.thumb_func
it_1:
mov r0, #0 @ Setup
cmp r0, #0 @ Setup
it eq @ IT instruction, Expected == 1
addeq r0, #1 @ Reached
bx lr @ Done
@ One conditional instruction, skipped.
.type it_2,%function
.thumb_func
it_2:
mov r0, #0 @ Setup
cmp r0, #0 @ Setup
it ne @ IT instruction, Expected == 0
addne r0, #1 @ Not reached
bx lr @ Done, Check $r0 == 0
@ Block of four, alternating, starting with executed.
.type it_3,%function
.thumb_func
it_3:
mov r0, #0 @ Setup
cmp r0, #0 @ Setup
itete ge @ IT instruction, Expected == 2
addge r0, #1 @ Reached
addlt r0, #2 @ Not reached
addge r0, #4 @ Reached
addlt r0, #8 @ Not reached
bx lr @ Done, Check $r0 == 5
@ Block of four, changing flags.
.type it_4,%function
.thumb_func
it_4:
mov r0, #0 @ Setup
cmp r0, #0 @ Setup
itttt ge @ IT instruction, Expected == 2
addge r0, #1 @ Reached
cmpge r0, #10 @ Reached
addge r0, #4 @ Not reached
addge r0, #8 @ Not reached
bx lr @ Done, Check $r0 == 1
@ Block of two, ending with taken branch.
.type it_5,%function
.thumb_func
it_5:
mov r0, #0 @ Setup
cmp r0, #0 @ Setup
itt ge @ IT instruction, Expected == 2
addge r0, #1 @ Reached
bge .L5 @ Reached
add r0, #2 @ Never reached
.L5: bx lr @ Done, Check $r0 == 1
@ Block of two, ending with untaken branch.
.type it_6,%function
.thumb_func
it_6:
mov r0, #0 @ Setup
cmp r0, #0 @ Setup
ite ge @ IT instruction, Expected == 2
addge r0, #1 @ Reached
blt .L6 @ Not reached
add r0, #2 @ Reached
.L6: bx lr @ Done, Check $r0 == 3
@ Block of four, taken, of different sizes
.type it_7,%function
.thumb_func
it_7:
mov r0, #0 @ Setup
cmp r0, #0 @ Setup
itttt ge @ IT instruction, Expected == 4
addge.n r0, #1 @ Reached
addge.w r0, #2 @ Reached
addge.n r0, #4 @ Reached
addge.w r0, #8 @ Reached
bx lr @ Done, Check $r0 == 15
@ Block of four, only first executed.
.type it_8,%function
.thumb_func
it_8:
mov r0, #0 @ Setup
cmp r0, #0 @ Setup
iteee ge @ IT instruction, Expected == 1
addge r0, #1 @ Reached
addlt r0, #2 @ Not reached
addlt r0, #4 @ Not reached
addlt r0, #8 @ Not reached
bx lr @ Done, Check $r0 == 1
.type it_breakpoints,%function
.thumb_func
it_breakpoints:
mov r0, #0
cmp r0, #0
it eq @ Location 1 @ Break 1
moveq r0, #0
it eq @ Location 2
moveq r0, #0 @ Break 2
it ne @ Location 3
movne r0, #0 @ Break 3
@ An IT block of maximum size.
itttt eq @ Location 4
moveq.w r0, #0
moveq.w r0, #0
moveq.w r0, #0
moveq.w r0, #0 @ Break 4
@ Just outside an IT block.
it eq
moveq r0, #0
mov r0, #0 @ Location 5 @ Break 5
@ After something that looks like an IT block, but
@ is the second half of an instruction.
.p2align 6
cmp r0, r0
b 1f
b.w .+0xe14 @ 0xf000 0xbf08 -> second half is IT EQ
1: mov r0, #0 @ Location 6 @ Break 6
@ After something that looks like an IT block, but
@ is data.
.p2align 6
b 1f
.short 0xbf08
1: mov r0, #0 @ Location 7 @ Break 7
bx lr
#endif /* __thumb2__ */
|
