Commit | Line | Data |
---|---|---|
3b16e843 | 1 | /* Instruction printing code for the OpenRISC 1000 |
9b201bb5 | 2 | Copyright (C) 2002, 2005, 2007 Free Software Foundation, Inc. |
3b16e843 NC |
3 | Contributed by Damjan Lampret <lampret@opencores.org>. |
4 | Modified from a29k port. | |
5 | ||
9b201bb5 | 6 | This file is part of the GNU opcodes library. |
3b16e843 | 7 | |
9b201bb5 | 8 | This library is free software; you can redistribute it and/or modify |
3b16e843 | 9 | it under the terms of the GNU General Public License as published by |
9b201bb5 NC |
10 | the Free Software Foundation; either version 3, or (at your option) |
11 | any later version. | |
3b16e843 | 12 | |
9b201bb5 NC |
13 | It is distributed in the hope that it will be useful, but WITHOUT |
14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
16 | License for more details. | |
3b16e843 NC |
17 | |
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
47b0e7ad NC |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
21 | MA 02110-1301, USA. */ | |
3b16e843 | 22 | |
9ccb8af9 | 23 | #ifndef DEBUG |
3b16e843 | 24 | #define DEBUG 0 |
9ccb8af9 | 25 | #endif |
3b16e843 NC |
26 | |
27 | #include "dis-asm.h" | |
28 | #include "opcode/or32.h" | |
29 | #include "safe-ctype.h" | |
30 | #include <string.h> | |
5e37cc46 | 31 | #include <stdlib.h> |
3b16e843 | 32 | |
5e37cc46 | 33 | #define EXTEND29(x) ((x) & (unsigned long) 0x10000000 ? ((x) | (unsigned long) 0xf0000000) : ((x))) |
3b16e843 | 34 | |
3b16e843 NC |
35 | /* Now find the four bytes of INSN_CH and put them in *INSN. */ |
36 | ||
37 | static void | |
47b0e7ad | 38 | find_bytes_big (unsigned char *insn_ch, unsigned long *insn) |
3b16e843 NC |
39 | { |
40 | *insn = | |
41 | ((unsigned long) insn_ch[0] << 24) + | |
42 | ((unsigned long) insn_ch[1] << 16) + | |
43 | ((unsigned long) insn_ch[2] << 8) + | |
44 | ((unsigned long) insn_ch[3]); | |
45 | #if DEBUG | |
9ccb8af9 | 46 | printf ("find_bytes_big3: %lx\n", *insn); |
3b16e843 NC |
47 | #endif |
48 | } | |
49 | ||
50 | static void | |
47b0e7ad | 51 | find_bytes_little (unsigned char *insn_ch, unsigned long *insn) |
3b16e843 NC |
52 | { |
53 | *insn = | |
54 | ((unsigned long) insn_ch[3] << 24) + | |
55 | ((unsigned long) insn_ch[2] << 16) + | |
56 | ((unsigned long) insn_ch[1] << 8) + | |
57 | ((unsigned long) insn_ch[0]); | |
58 | } | |
59 | ||
47b0e7ad | 60 | typedef void (*find_byte_func_type) (unsigned char *, unsigned long *); |
3b16e843 NC |
61 | |
62 | static unsigned long | |
47b0e7ad | 63 | or32_extract (char param_ch, char *enc_initial, unsigned long insn) |
3b16e843 NC |
64 | { |
65 | char *enc; | |
66 | unsigned long ret = 0; | |
67 | int opc_pos = 0; | |
68 | int param_pos = 0; | |
69 | ||
70 | for (enc = enc_initial; *enc != '\0'; enc++) | |
71 | if (*enc == param_ch) | |
5e37cc46 NC |
72 | { |
73 | if (enc - 2 >= enc_initial && (*(enc - 2) == '0') && (*(enc - 1) == 'x')) | |
74 | continue; | |
75 | else | |
76 | param_pos++; | |
77 | } | |
3b16e843 NC |
78 | |
79 | #if DEBUG | |
80 | printf ("or32_extract: %c %x ", param_ch, param_pos); | |
81 | #endif | |
82 | opc_pos = 32; | |
83 | ||
84 | for (enc = enc_initial; *enc != '\0'; ) | |
85 | if ((*enc == '0') && (*(enc + 1) == 'x')) | |
86 | { | |
87 | opc_pos -= 4; | |
88 | ||
89 | if ((param_ch == '0') || (param_ch == '1')) | |
90 | { | |
5e37cc46 | 91 | unsigned long tmp = strtoul (enc, NULL, 16); |
3b16e843 | 92 | #if DEBUG |
9ccb8af9 | 93 | printf (" enc=%s, tmp=%lx ", enc, tmp); |
3b16e843 NC |
94 | #endif |
95 | if (param_ch == '0') | |
96 | tmp = 15 - tmp; | |
97 | ret |= tmp << opc_pos; | |
98 | } | |
99 | enc += 3; | |
100 | } | |
101 | else if ((*enc == '0') || (*enc == '1')) | |
102 | { | |
103 | opc_pos--; | |
104 | if (param_ch == *enc) | |
105 | ret |= 1 << opc_pos; | |
106 | enc++; | |
107 | } | |
108 | else if (*enc == param_ch) | |
109 | { | |
110 | opc_pos--; | |
111 | param_pos--; | |
112 | #if DEBUG | |
9ccb8af9 | 113 | printf ("\n ret=%lx opc_pos=%x, param_pos=%x\n", ret, opc_pos, param_pos); |
3b16e843 NC |
114 | #endif |
115 | ret += ((insn >> opc_pos) & 0x1) << param_pos; | |
116 | ||
117 | if (!param_pos | |
118 | && letter_signed (param_ch) | |
5e37cc46 | 119 | && ret >> (letter_range (param_ch) - 1)) |
3b16e843 NC |
120 | { |
121 | #if DEBUG | |
9ccb8af9 | 122 | printf ("\n ret=%lx opc_pos=%x, param_pos=%x\n", |
3b16e843 NC |
123 | ret, opc_pos, param_pos); |
124 | #endif | |
125 | ret |= 0xffffffff << letter_range(param_ch); | |
126 | #if DEBUG | |
9ccb8af9 | 127 | printf ("\n after conversion to signed: ret=%lx\n", ret); |
3b16e843 NC |
128 | #endif |
129 | } | |
130 | enc++; | |
131 | } | |
132 | else if (ISALPHA (*enc)) | |
133 | { | |
134 | opc_pos--; | |
135 | enc++; | |
136 | } | |
137 | else if (*enc == '-') | |
138 | { | |
139 | opc_pos--; | |
140 | enc++; | |
141 | } | |
142 | else | |
143 | enc++; | |
144 | ||
145 | #if DEBUG | |
9ccb8af9 | 146 | printf ("ret=%lx\n", ret); |
3b16e843 NC |
147 | #endif |
148 | return ret; | |
149 | } | |
150 | ||
151 | static int | |
47b0e7ad | 152 | or32_opcode_match (unsigned long insn, char *encoding) |
3b16e843 NC |
153 | { |
154 | unsigned long ones, zeros; | |
155 | ||
156 | #if DEBUG | |
157 | printf ("or32_opcode_match: %.8lx\n", insn); | |
158 | #endif | |
159 | ones = or32_extract ('1', encoding, insn); | |
160 | zeros = or32_extract ('0', encoding, insn); | |
161 | ||
162 | #if DEBUG | |
9ccb8af9 AM |
163 | printf ("ones: %lx \n", ones); |
164 | printf ("zeros: %lx \n", zeros); | |
3b16e843 NC |
165 | #endif |
166 | if ((insn & ones) != ones) | |
167 | { | |
168 | #if DEBUG | |
169 | printf ("ret1\n"); | |
170 | #endif | |
171 | return 0; | |
172 | } | |
173 | ||
174 | if ((~insn & zeros) != zeros) | |
175 | { | |
176 | #if DEBUG | |
177 | printf ("ret2\n"); | |
178 | #endif | |
179 | return 0; | |
180 | } | |
181 | ||
182 | #if DEBUG | |
183 | printf ("ret3\n"); | |
184 | #endif | |
185 | return 1; | |
186 | } | |
187 | ||
188 | /* Print register to INFO->STREAM. Used only by print_insn. */ | |
189 | ||
190 | static void | |
47b0e7ad NC |
191 | or32_print_register (char param_ch, |
192 | char *encoding, | |
193 | unsigned long insn, | |
194 | struct disassemble_info *info) | |
3b16e843 NC |
195 | { |
196 | int regnum = or32_extract (param_ch, encoding, insn); | |
197 | ||
198 | #if DEBUG | |
9ccb8af9 | 199 | printf ("or32_print_register: %c, %s, %lx\n", param_ch, encoding, insn); |
3b16e843 NC |
200 | #endif |
201 | if (param_ch == 'A') | |
202 | (*info->fprintf_func) (info->stream, "r%d", regnum); | |
203 | else if (param_ch == 'B') | |
204 | (*info->fprintf_func) (info->stream, "r%d", regnum); | |
205 | else if (param_ch == 'D') | |
206 | (*info->fprintf_func) (info->stream, "r%d", regnum); | |
207 | else if (regnum < 16) | |
208 | (*info->fprintf_func) (info->stream, "r%d", regnum); | |
209 | else if (regnum < 32) | |
210 | (*info->fprintf_func) (info->stream, "r%d", regnum-16); | |
211 | else | |
212 | (*info->fprintf_func) (info->stream, "X%d", regnum); | |
213 | } | |
214 | ||
215 | /* Print immediate to INFO->STREAM. Used only by print_insn. */ | |
216 | ||
217 | static void | |
47b0e7ad NC |
218 | or32_print_immediate (char param_ch, |
219 | char *encoding, | |
220 | unsigned long insn, | |
221 | struct disassemble_info *info) | |
3b16e843 NC |
222 | { |
223 | int imm = or32_extract(param_ch, encoding, insn); | |
224 | ||
225 | if (letter_signed(param_ch)) | |
226 | (*info->fprintf_func) (info->stream, "0x%x", imm); | |
227 | /* (*info->fprintf_func) (info->stream, "%d", imm); */ | |
228 | else | |
229 | (*info->fprintf_func) (info->stream, "0x%x", imm); | |
230 | } | |
231 | ||
232 | /* Print one instruction from MEMADDR on INFO->STREAM. | |
233 | Return the size of the instruction (always 4 on or32). */ | |
234 | ||
235 | static int | |
47b0e7ad | 236 | print_insn (bfd_vma memaddr, struct disassemble_info *info) |
3b16e843 NC |
237 | { |
238 | /* The raw instruction. */ | |
239 | unsigned char insn_ch[4]; | |
240 | /* Address. Will be sign extened 27-bit. */ | |
5e37cc46 | 241 | unsigned long addr; |
3b16e843 NC |
242 | /* The four bytes of the instruction. */ |
243 | unsigned long insn; | |
47b0e7ad | 244 | find_byte_func_type find_byte_func = (find_byte_func_type) info->private_data; |
56da5fed | 245 | struct or32_opcode const * opcode; |
3b16e843 NC |
246 | |
247 | { | |
248 | int status = | |
249 | (*info->read_memory_func) (memaddr, (bfd_byte *) &insn_ch[0], 4, info); | |
250 | ||
251 | if (status != 0) | |
252 | { | |
253 | (*info->memory_error_func) (status, memaddr, info); | |
254 | return -1; | |
255 | } | |
256 | } | |
257 | ||
258 | (*find_byte_func) (&insn_ch[0], &insn); | |
259 | ||
260 | for (opcode = &or32_opcodes[0]; | |
261 | opcode < &or32_opcodes[or32_num_opcodes]; | |
262 | ++opcode) | |
263 | { | |
264 | if (or32_opcode_match (insn, opcode->encoding)) | |
265 | { | |
266 | char *s; | |
267 | ||
268 | (*info->fprintf_func) (info->stream, "%s ", opcode->name); | |
269 | ||
270 | for (s = opcode->args; *s != '\0'; ++s) | |
271 | { | |
272 | switch (*s) | |
273 | { | |
274 | case '\0': | |
275 | return 4; | |
276 | ||
277 | case 'r': | |
278 | or32_print_register (*++s, opcode->encoding, insn, info); | |
279 | break; | |
280 | ||
281 | case 'X': | |
282 | addr = or32_extract ('X', opcode->encoding, insn) << 2; | |
283 | ||
284 | /* Calulate the correct address. XXX is this really correct ?? */ | |
285 | addr = memaddr + EXTEND29 (addr); | |
286 | ||
287 | (*info->print_address_func) | |
288 | (addr, info); | |
289 | break; | |
290 | ||
291 | default: | |
292 | if (strchr (opcode->encoding, *s)) | |
293 | or32_print_immediate (*s, opcode->encoding, insn, info); | |
294 | else | |
295 | (*info->fprintf_func) (info->stream, "%c", *s); | |
296 | } | |
297 | } | |
298 | ||
299 | return 4; | |
300 | } | |
301 | } | |
302 | ||
303 | /* This used to be %8x for binutils. */ | |
304 | (*info->fprintf_func) | |
0fd3a477 | 305 | (info->stream, ".word 0x%08lx", insn); |
3b16e843 NC |
306 | return 4; |
307 | } | |
308 | ||
309 | /* Disassemble a big-endian or32 instruction. */ | |
310 | ||
311 | int | |
47b0e7ad | 312 | print_insn_big_or32 (bfd_vma memaddr, struct disassemble_info *info) |
3b16e843 | 313 | { |
47b0e7ad NC |
314 | info->private_data = find_bytes_big; |
315 | ||
3b16e843 NC |
316 | return print_insn (memaddr, info); |
317 | } | |
318 | ||
319 | /* Disassemble a little-endian or32 instruction. */ | |
320 | ||
321 | int | |
47b0e7ad | 322 | print_insn_little_or32 (bfd_vma memaddr, struct disassemble_info *info) |
3b16e843 | 323 | { |
47b0e7ad | 324 | info->private_data = find_bytes_little; |
3b16e843 NC |
325 | return print_insn (memaddr, info); |
326 | } |