Merge branch 'linus' into perf/core, to fix conflicts
[linux-2.6-microblaze.git] / tools / perf / arch / powerpc / annotate / instructions.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/compiler.h>
3
4 static struct ins_ops *powerpc__associate_instruction_ops(struct arch *arch, const char *name)
5 {
6         int i;
7         struct ins_ops *ops;
8
9         /*
10          * - Interested only if instruction starts with 'b'.
11          * - Few start with 'b', but aren't branch instructions.
12          */
13         if (name[0] != 'b'             ||
14             !strncmp(name, "bcd", 3)   ||
15             !strncmp(name, "brinc", 5) ||
16             !strncmp(name, "bper", 4))
17                 return NULL;
18
19         ops = &jump_ops;
20
21         i = strlen(name) - 1;
22         if (i < 0)
23                 return NULL;
24
25         /* ignore optional hints at the end of the instructions */
26         if (name[i] == '+' || name[i] == '-')
27                 i--;
28
29         if (name[i] == 'l' || (name[i] == 'a' && name[i-1] == 'l')) {
30                 /*
31                  * if the instruction ends up with 'l' or 'la', then
32                  * those are considered 'calls' since they update LR.
33                  * ... except for 'bnl' which is branch if not less than
34                  * and the absolute form of the same.
35                  */
36                 if (strcmp(name, "bnl") && strcmp(name, "bnl+") &&
37                     strcmp(name, "bnl-") && strcmp(name, "bnla") &&
38                     strcmp(name, "bnla+") && strcmp(name, "bnla-"))
39                         ops = &call_ops;
40         }
41         if (name[i] == 'r' && name[i-1] == 'l')
42                 /*
43                  * instructions ending with 'lr' are considered to be
44                  * return instructions
45                  */
46                 ops = &ret_ops;
47
48         arch__associate_ins_ops(arch, name, ops);
49         return ops;
50 }
51
52 static int powerpc__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
53 {
54         if (!arch->initialized) {
55                 arch->initialized = true;
56                 arch->associate_instruction_ops = powerpc__associate_instruction_ops;
57                 arch->objdump.comment_char      = '#';
58         }
59
60         return 0;
61 }