1// SPDX-License-Identifier: GPL-2.0
2
3static int is_branch_cond(const char *cond)
4{
5	if (cond[0] == '\0')
6		return 1;
7
8	if (cond[0] == 'a' && cond[1] == '\0')
9		return 1;
10
11	if (cond[0] == 'c' &&
12	    (cond[1] == 'c' || cond[1] == 's') &&
13	    cond[2] == '\0')
14		return 1;
15
16	if (cond[0] == 'e' &&
17	    (cond[1] == '\0' ||
18	     (cond[1] == 'q' && cond[2] == '\0')))
19		return 1;
20
21	if (cond[0] == 'g' &&
22	    (cond[1] == '\0' ||
23	     (cond[1] == 't' && cond[2] == '\0') ||
24	     (cond[1] == 'e' && cond[2] == '\0') ||
25	     (cond[1] == 'e' && cond[2] == 'u' && cond[3] == '\0')))
26		return 1;
27
28	if (cond[0] == 'l' &&
29	    (cond[1] == '\0' ||
30	     (cond[1] == 't' && cond[2] == '\0') ||
31	     (cond[1] == 'u' && cond[2] == '\0') ||
32	     (cond[1] == 'e' && cond[2] == '\0') ||
33	     (cond[1] == 'e' && cond[2] == 'u' && cond[3] == '\0')))
34		return 1;
35
36	if (cond[0] == 'n' &&
37	    (cond[1] == '\0' ||
38	     (cond[1] == 'e' && cond[2] == '\0') ||
39	     (cond[1] == 'z' && cond[2] == '\0') ||
40	     (cond[1] == 'e' && cond[2] == 'g' && cond[3] == '\0')))
41		return 1;
42
43	if (cond[0] == 'b' &&
44	    cond[1] == 'p' &&
45	    cond[2] == 'o' &&
46	    cond[3] == 's' &&
47	    cond[4] == '\0')
48		return 1;
49
50	if (cond[0] == 'v' &&
51	    (cond[1] == 'c' || cond[1] == 's') &&
52	    cond[2] == '\0')
53		return 1;
54
55	if (cond[0] == 'b' &&
56	    cond[1] == 'z' &&
57	    cond[2] == '\0')
58		return 1;
59
60	return 0;
61}
62
63static int is_branch_reg_cond(const char *cond)
64{
65	if ((cond[0] == 'n' || cond[0] == 'l') &&
66	    cond[1] == 'z' &&
67	    cond[2] == '\0')
68		return 1;
69
70	if (cond[0] == 'z' &&
71	    cond[1] == '\0')
72		return 1;
73
74	if ((cond[0] == 'g' || cond[0] == 'l') &&
75	    cond[1] == 'e' &&
76	    cond[2] == 'z' &&
77	    cond[3] == '\0')
78		return 1;
79
80	if (cond[0] == 'g' &&
81	    cond[1] == 'z' &&
82	    cond[2] == '\0')
83		return 1;
84
85	return 0;
86}
87
88static int is_branch_float_cond(const char *cond)
89{
90	if (cond[0] == '\0')
91		return 1;
92
93	if ((cond[0] == 'a' || cond[0] == 'e' ||
94	     cond[0] == 'z' || cond[0] == 'g' ||
95	     cond[0] == 'l' || cond[0] == 'n' ||
96	     cond[0] == 'o' || cond[0] == 'u') &&
97	    cond[1] == '\0')
98		return 1;
99
100	if (((cond[0] == 'g' && cond[1] == 'e') ||
101	     (cond[0] == 'l' && (cond[1] == 'e' ||
102				 cond[1] == 'g')) ||
103	     (cond[0] == 'n' && (cond[1] == 'e' ||
104				 cond[1] == 'z')) ||
105	     (cond[0] == 'u' && (cond[1] == 'e' ||
106				 cond[1] == 'g' ||
107				 cond[1] == 'l'))) &&
108	    cond[2] == '\0')
109		return 1;
110
111	if (cond[0] == 'u' &&
112	    (cond[1] == 'g' || cond[1] == 'l') &&
113	    cond[2] == 'e' &&
114	    cond[3] == '\0')
115		return 1;
116
117	return 0;
118}
119
120static struct ins_ops *sparc__associate_instruction_ops(struct arch *arch, const char *name)
121{
122	struct ins_ops *ops = NULL;
123
124	if (!strcmp(name, "call") ||
125	    !strcmp(name, "jmp") ||
126	    !strcmp(name, "jmpl")) {
127		ops = &call_ops;
128	} else if (!strcmp(name, "ret") ||
129		   !strcmp(name, "retl") ||
130		   !strcmp(name, "return")) {
131		ops = &ret_ops;
132	} else if (!strcmp(name, "mov")) {
133		ops = &mov_ops;
134	} else {
135		if (name[0] == 'c' &&
136		    (name[1] == 'w' || name[1] == 'x'))
137			name += 2;
138
139		if (name[0] == 'b') {
140			const char *cond = name + 1;
141
142			if (cond[0] == 'r') {
143				if (is_branch_reg_cond(cond + 1))
144					ops = &jump_ops;
145			} else if (is_branch_cond(cond)) {
146				ops = &jump_ops;
147			}
148		} else if (name[0] == 'f' && name[1] == 'b') {
149			if (is_branch_float_cond(name + 2))
150				ops = &jump_ops;
151		}
152	}
153
154	if (ops)
155		arch__associate_ins_ops(arch, name, ops);
156
157	return ops;
158}
159
160static int sparc__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
161{
162	if (!arch->initialized) {
163		arch->initialized = true;
164		arch->associate_instruction_ops = sparc__associate_instruction_ops;
165		arch->objdump.comment_char = '#';
166	}
167
168	return 0;
169}
170