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9c03036a DE |
1 | /* Disassembler interface for targets using CGEN. -*- C -*- |
2 | CGEN: Cpu tools GENerator | |
3 | ||
4 | This file is used to generate m32r-dis.c. | |
5 | ||
6 | Copyright (C) 1996, 1997 Free Software Foundation, Inc. | |
7 | ||
8 | This file is part of the GNU Binutils and GDB, the GNU debugger. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
23 | ||
23cf992f | 24 | #include "sysdep.h" |
9c03036a DE |
25 | #include <stdio.h> |
26 | #include "ansidecl.h" | |
27 | #include "dis-asm.h" | |
9c03036a | 28 | #include "bfd.h" |
23cf992f | 29 | #include "m32r-opc.h" |
9c03036a DE |
30 | |
31 | /* ??? The layout of this stuff is still work in progress. | |
32 | For speed in assembly/disassembly, we use inline functions. That of course | |
33 | will only work for GCC. When this stuff is finished, we can decide whether | |
34 | to keep the inline functions (and only get the performance increase when | |
35 | compiled with GCC), or switch to macros, or use something else. | |
36 | */ | |
37 | ||
38 | /* Default text to print if an instruction isn't recognized. */ | |
39 | #define UNKNOWN_INSN_MSG "*unknown*" | |
40 | ||
41 | /* FIXME: Machine generate. */ | |
42 | #ifndef CGEN_PCREL_OFFSET | |
43 | #define CGEN_PCREL_OFFSET 0 | |
44 | #endif | |
45 | ||
46 | static int print_insn PARAMS ((bfd_vma, disassemble_info *, char *, int)); | |
47 | ||
48 | static int extract_insn_normal | |
23cf992f | 49 | PARAMS ((const CGEN_INSN *, void *, cgen_insn_t, CGEN_FIELDS *)); |
9c03036a | 50 | static void print_insn_normal |
23cf992f | 51 | PARAMS ((void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int)); |
9c03036a DE |
52 | \f |
53 | /* Default extraction routine. | |
54 | ||
55 | ATTRS is a mask of the boolean attributes. We only need `unsigned', | |
56 | but for generality we take a bitmask of all of them. */ | |
57 | ||
58 | static int | |
59 | extract_normal (buf_ctrl, insn_value, attrs, start, length, shift, total_length, valuep) | |
853713a7 DE |
60 | void *buf_ctrl; |
61 | cgen_insn_t insn_value; | |
9c03036a | 62 | unsigned int attrs; |
853713a7 DE |
63 | int start, length, shift, total_length; |
64 | long *valuep; | |
9c03036a DE |
65 | { |
66 | long value; | |
67 | ||
68 | #ifdef CGEN_INT_INSN | |
69 | #if 0 | |
70 | value = ((insn_value >> (CGEN_BASE_INSN_BITSIZE - (start + length))) | |
71 | & ((1 << length) - 1)); | |
72 | #else | |
73 | value = ((insn_value >> (total_length - (start + length))) | |
74 | & ((1 << length) - 1)); | |
75 | #endif | |
76 | if (! (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_UNSIGNED)) | |
77 | && (value & (1 << (length - 1)))) | |
78 | value -= 1 << length; | |
79 | #else | |
80 | /* FIXME: unfinished */ | |
81 | #endif | |
82 | ||
83 | /* This is backwards as we undo the effects of insert_normal. */ | |
84 | if (shift < 0) | |
85 | value >>= -shift; | |
86 | else | |
87 | value <<= shift; | |
88 | ||
853713a7 | 89 | *valuep = value; |
9c03036a DE |
90 | return 1; |
91 | } | |
92 | ||
93 | /* Default print handler. */ | |
94 | ||
95 | static void | |
96 | print_normal (dis_info, value, attrs, pc, length) | |
853713a7 DE |
97 | void *dis_info; |
98 | long value; | |
99 | unsigned int attrs; | |
9c03036a | 100 | unsigned long pc; /* FIXME: should be bfd_vma */ |
853713a7 | 101 | int length; |
9c03036a | 102 | { |
853713a7 | 103 | disassemble_info *info = dis_info; |
9c03036a DE |
104 | |
105 | /* Print the operand as directed by the attributes. */ | |
106 | if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_FAKE)) | |
107 | ; /* nothing to do (??? at least not yet) */ | |
108 | else if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_PCREL_ADDR)) | |
109 | (*info->print_address_func) (pc + CGEN_PCREL_OFFSET + value, info); | |
110 | /* ??? Not all cases of this are currently caught. */ | |
111 | else if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_ABS_ADDR)) | |
112 | /* FIXME: Why & 0xffffffff? */ | |
113 | (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info); | |
114 | else if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_UNSIGNED)) | |
115 | (*info->fprintf_func) (info->stream, "0x%lx", value); | |
116 | else | |
117 | (*info->fprintf_func) (info->stream, "%ld", value); | |
118 | } | |
119 | ||
120 | /* Keyword print handler. */ | |
121 | ||
122 | static void | |
123 | print_keyword (dis_info, keyword_table, value, attrs) | |
853713a7 DE |
124 | void *dis_info; |
125 | CGEN_KEYWORD *keyword_table; | |
126 | long value; | |
127 | CGEN_ATTR *attrs; | |
9c03036a | 128 | { |
853713a7 DE |
129 | disassemble_info *info = dis_info; |
130 | const CGEN_KEYWORD_ENTRY *ke; | |
9c03036a DE |
131 | |
132 | ke = cgen_keyword_lookup_value (keyword_table, value); | |
853713a7 DE |
133 | if (ke != NULL) |
134 | (*info->fprintf_func) (info->stream, "%s", ke->name); | |
135 | else | |
136 | (*info->fprintf_func) (info->stream, "???"); | |
9c03036a DE |
137 | } |
138 | \f | |
139 | /* -- disassembler routines inserted here */ | |
853713a7 DE |
140 | /* -- dis.c */ |
141 | ||
142 | #undef CGEN_PRINT_INSN | |
143 | #define CGEN_PRINT_INSN my_print_insn | |
144 | ||
145 | static int | |
146 | my_print_insn (pc, info, buf, buflen) | |
147 | bfd_vma pc; | |
148 | disassemble_info *info; | |
149 | char *buf; | |
150 | int buflen; | |
151 | { | |
152 | /* 32 bit insn? */ | |
153 | if ((pc & 3) == 0 && (buf[0] & 0x80) != 0) | |
154 | return print_insn (pc, info, buf, buflen); | |
155 | ||
156 | /* Print the first insn. */ | |
157 | if ((pc & 3) == 0) | |
158 | { | |
159 | if (print_insn (pc, info, buf, 16) == 0) | |
160 | (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); | |
161 | buf += 2; | |
162 | } | |
163 | ||
164 | if (buf[0] & 0x80) | |
165 | { | |
166 | /* Parallel. */ | |
167 | (*info->fprintf_func) (info->stream, " || "); | |
168 | buf[0] &= 0x7f; | |
169 | } | |
170 | else | |
171 | (*info->fprintf_func) (info->stream, " -> "); | |
172 | ||
173 | /* The "& 3" is to ensure the branch address is computed correctly | |
174 | [if it is a branch]. */ | |
175 | if (print_insn (pc & ~ (bfd_vma) 3, info, buf, 16) == 0) | |
176 | (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); | |
177 | ||
178 | return (pc & 3) ? 2 : 4; | |
179 | } | |
180 | ||
181 | /* -- */ | |
182 | ||
183 | /* Main entry point for operand extraction. | |
184 | ||
185 | This function is basically just a big switch statement. Earlier versions | |
186 | used tables to look up the function to use, but | |
187 | - if the table contains both assembler and disassembler functions then | |
188 | the disassembler contains much of the assembler and vice-versa, | |
189 | - there's a lot of inlining possibilities as things grow, | |
190 | - using a switch statement avoids the function call overhead. | |
191 | ||
192 | This function could be moved into `print_insn_normal', but keeping it | |
193 | separate makes clear the interface between `print_insn_normal' and each of | |
194 | the handlers. | |
195 | */ | |
196 | ||
197 | CGEN_INLINE int | |
198 | m32r_cgen_extract_operand (opindex, buf_ctrl, insn_value, fields) | |
5d07b6cf DE |
199 | int opindex; |
200 | void * buf_ctrl; | |
201 | cgen_insn_t insn_value; | |
853713a7 DE |
202 | CGEN_FIELDS * fields; |
203 | { | |
204 | int length; | |
205 | ||
206 | switch (opindex) | |
207 | { | |
208 | case M32R_OPERAND_SR : | |
209 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_UNSIGNED), 12, 4, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_r2); | |
210 | break; | |
211 | case M32R_OPERAND_DR : | |
212 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_UNSIGNED), 4, 4, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_r1); | |
213 | break; | |
214 | case M32R_OPERAND_SRC1 : | |
215 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_UNSIGNED), 4, 4, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_r1); | |
216 | break; | |
217 | case M32R_OPERAND_SRC2 : | |
218 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_UNSIGNED), 12, 4, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_r2); | |
219 | break; | |
220 | case M32R_OPERAND_SCR : | |
221 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_UNSIGNED), 12, 4, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_r2); | |
222 | break; | |
223 | case M32R_OPERAND_DCR : | |
224 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_UNSIGNED), 4, 4, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_r1); | |
225 | break; | |
226 | case M32R_OPERAND_SIMM8 : | |
227 | length = extract_normal (NULL /*FIXME*/, insn_value, 0, 8, 8, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_simm8); | |
228 | break; | |
229 | case M32R_OPERAND_SIMM16 : | |
230 | length = extract_normal (NULL /*FIXME*/, insn_value, 0, 16, 16, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_simm16); | |
231 | break; | |
232 | case M32R_OPERAND_UIMM4 : | |
233 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_UNSIGNED), 12, 4, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_uimm4); | |
234 | break; | |
235 | case M32R_OPERAND_UIMM5 : | |
236 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_UNSIGNED), 11, 5, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_uimm5); | |
237 | break; | |
238 | case M32R_OPERAND_UIMM16 : | |
239 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_UNSIGNED), 16, 16, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_uimm16); | |
240 | break; | |
241 | case M32R_OPERAND_HI16 : | |
242 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_SIGN_OPT)|(1<<CGEN_OPERAND_UNSIGNED), 16, 16, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_hi16); | |
243 | break; | |
244 | case M32R_OPERAND_SLO16 : | |
245 | length = extract_normal (NULL /*FIXME*/, insn_value, 0, 16, 16, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_simm16); | |
246 | break; | |
247 | case M32R_OPERAND_ULO16 : | |
248 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_UNSIGNED), 16, 16, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_uimm16); | |
249 | break; | |
250 | case M32R_OPERAND_UIMM24 : | |
251 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_ABS_ADDR)|(1<<CGEN_OPERAND_UNSIGNED), 8, 24, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_uimm24); | |
252 | break; | |
253 | case M32R_OPERAND_DISP8 : | |
254 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), 8, 8, 2, CGEN_FIELDS_BITSIZE (fields), & fields->f_disp8); | |
255 | break; | |
256 | case M32R_OPERAND_DISP16 : | |
257 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), 16, 16, 2, CGEN_FIELDS_BITSIZE (fields), & fields->f_disp16); | |
258 | break; | |
259 | case M32R_OPERAND_DISP24 : | |
260 | length = extract_normal (NULL /*FIXME*/, insn_value, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), 8, 24, 2, CGEN_FIELDS_BITSIZE (fields), & fields->f_disp24); | |
261 | break; | |
262 | ||
263 | default : | |
264 | fprintf (stderr, "Unrecognized field %d while decoding insn.\n", | |
265 | opindex); | |
266 | abort (); | |
267 | } | |
268 | ||
269 | return length; | |
270 | } | |
271 | ||
272 | /* Main entry point for printing operands. | |
273 | ||
274 | This function is basically just a big switch statement. Earlier versions | |
275 | used tables to look up the function to use, but | |
276 | - if the table contains both assembler and disassembler functions then | |
277 | the disassembler contains much of the assembler and vice-versa, | |
278 | - there's a lot of inlining possibilities as things grow, | |
279 | - using a switch statement avoids the function call overhead. | |
280 | ||
281 | This function could be moved into `print_insn_normal', but keeping it | |
282 | separate makes clear the interface between `print_insn_normal' and each of | |
283 | the handlers. | |
284 | */ | |
285 | ||
286 | CGEN_INLINE void | |
287 | m32r_cgen_print_operand (opindex, info, fields, attrs, pc, length) | |
5d07b6cf | 288 | int opindex; |
853713a7 | 289 | disassemble_info * info; |
5d07b6cf DE |
290 | CGEN_FIELDS * fields; |
291 | void const * attrs; | |
292 | bfd_vma pc; | |
293 | int length; | |
853713a7 DE |
294 | { |
295 | switch (opindex) | |
296 | { | |
297 | case M32R_OPERAND_SR : | |
298 | print_keyword (info, & m32r_cgen_opval_h_gr, fields->f_r2, 0|(1<<CGEN_OPERAND_UNSIGNED)); | |
299 | break; | |
300 | case M32R_OPERAND_DR : | |
301 | print_keyword (info, & m32r_cgen_opval_h_gr, fields->f_r1, 0|(1<<CGEN_OPERAND_UNSIGNED)); | |
302 | break; | |
303 | case M32R_OPERAND_SRC1 : | |
304 | print_keyword (info, & m32r_cgen_opval_h_gr, fields->f_r1, 0|(1<<CGEN_OPERAND_UNSIGNED)); | |
305 | break; | |
306 | case M32R_OPERAND_SRC2 : | |
307 | print_keyword (info, & m32r_cgen_opval_h_gr, fields->f_r2, 0|(1<<CGEN_OPERAND_UNSIGNED)); | |
308 | break; | |
309 | case M32R_OPERAND_SCR : | |
310 | print_keyword (info, & m32r_cgen_opval_h_cr, fields->f_r2, 0|(1<<CGEN_OPERAND_UNSIGNED)); | |
311 | break; | |
312 | case M32R_OPERAND_DCR : | |
313 | print_keyword (info, & m32r_cgen_opval_h_cr, fields->f_r1, 0|(1<<CGEN_OPERAND_UNSIGNED)); | |
314 | break; | |
315 | case M32R_OPERAND_SIMM8 : | |
316 | print_normal (info, fields->f_simm8, 0, pc, length); | |
317 | break; | |
318 | case M32R_OPERAND_SIMM16 : | |
319 | print_normal (info, fields->f_simm16, 0, pc, length); | |
320 | break; | |
321 | case M32R_OPERAND_UIMM4 : | |
322 | print_normal (info, fields->f_uimm4, 0|(1<<CGEN_OPERAND_UNSIGNED), pc, length); | |
323 | break; | |
324 | case M32R_OPERAND_UIMM5 : | |
325 | print_normal (info, fields->f_uimm5, 0|(1<<CGEN_OPERAND_UNSIGNED), pc, length); | |
326 | break; | |
327 | case M32R_OPERAND_UIMM16 : | |
328 | print_normal (info, fields->f_uimm16, 0|(1<<CGEN_OPERAND_UNSIGNED), pc, length); | |
329 | break; | |
330 | case M32R_OPERAND_HI16 : | |
331 | print_normal (info, fields->f_hi16, 0|(1<<CGEN_OPERAND_SIGN_OPT)|(1<<CGEN_OPERAND_UNSIGNED), pc, length); | |
332 | break; | |
333 | case M32R_OPERAND_SLO16 : | |
334 | print_normal (info, fields->f_simm16, 0, pc, length); | |
335 | break; | |
336 | case M32R_OPERAND_ULO16 : | |
337 | print_normal (info, fields->f_uimm16, 0|(1<<CGEN_OPERAND_UNSIGNED), pc, length); | |
338 | break; | |
339 | case M32R_OPERAND_UIMM24 : | |
340 | print_normal (info, fields->f_uimm24, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_ABS_ADDR)|(1<<CGEN_OPERAND_UNSIGNED), pc, length); | |
341 | break; | |
342 | case M32R_OPERAND_DISP8 : | |
343 | print_normal (info, fields->f_disp8, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length); | |
344 | break; | |
345 | case M32R_OPERAND_DISP16 : | |
346 | print_normal (info, fields->f_disp16, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length); | |
347 | break; | |
348 | case M32R_OPERAND_DISP24 : | |
349 | print_normal (info, fields->f_disp24, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length); | |
350 | break; | |
351 | ||
352 | default : | |
353 | fprintf (stderr, "Unrecognized field %d while printing insn.\n", | |
354 | opindex); | |
355 | abort (); | |
356 | } | |
357 | } | |
358 | ||
359 | cgen_extract_fn * m32r_cgen_extract_handlers[] = | |
5d07b6cf DE |
360 | { |
361 | 0, /* default */ | |
853713a7 DE |
362 | extract_insn_normal, |
363 | }; | |
364 | ||
365 | cgen_print_fn * m32r_cgen_print_handlers[] = | |
5d07b6cf DE |
366 | { |
367 | 0, /* default */ | |
853713a7 DE |
368 | print_insn_normal, |
369 | }; | |
370 | ||
371 | ||
372 | void | |
373 | m32r_cgen_init_dis (mach, endian) | |
374 | int mach; | |
375 | enum cgen_endian endian; | |
376 | { | |
377 | m32r_cgen_init_tables (mach); | |
378 | cgen_set_cpu (& m32r_cgen_opcode_data, mach, endian); | |
379 | cgen_dis_init (); | |
380 | } | |
381 | ||
9c03036a DE |
382 | \f |
383 | /* Default insn extractor. | |
384 | ||
385 | The extracted fields are stored in DIS_FLDS. | |
386 | BUF_CTRL is used to handle reading variable length insns (FIXME: not done). | |
387 | Return the length of the insn in bits, or 0 if no match. */ | |
388 | ||
389 | static int | |
390 | extract_insn_normal (insn, buf_ctrl, insn_value, fields) | |
853713a7 DE |
391 | const CGEN_INSN *insn; |
392 | void *buf_ctrl; | |
393 | cgen_insn_t insn_value; | |
394 | CGEN_FIELDS *fields; | |
9c03036a | 395 | { |
853713a7 DE |
396 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); |
397 | const unsigned char *syn; | |
9c03036a | 398 | |
9c03036a DE |
399 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); |
400 | ||
401 | CGEN_INIT_EXTRACT (); | |
402 | ||
853713a7 | 403 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) |
9c03036a DE |
404 | { |
405 | int length; | |
406 | ||
853713a7 | 407 | if (CGEN_SYNTAX_CHAR_P (*syn)) |
9c03036a DE |
408 | continue; |
409 | ||
853713a7 | 410 | length = m32r_cgen_extract_operand (CGEN_SYNTAX_FIELD (*syn), |
9c03036a DE |
411 | buf_ctrl, insn_value, fields); |
412 | if (length == 0) | |
413 | return 0; | |
414 | } | |
415 | ||
23cf992f NC |
416 | /* We recognized and successfully extracted this insn. */ |
417 | return CGEN_INSN_BITSIZE (insn); | |
9c03036a DE |
418 | } |
419 | ||
420 | /* Default insn printer. | |
421 | ||
422 | DIS_INFO is defined as `void *' so the disassembler needn't know anything | |
423 | about disassemble_info. | |
424 | */ | |
425 | ||
426 | static void | |
427 | print_insn_normal (dis_info, insn, fields, pc, length) | |
853713a7 DE |
428 | void *dis_info; |
429 | const CGEN_INSN *insn; | |
430 | CGEN_FIELDS *fields; | |
431 | bfd_vma pc; | |
432 | int length; | |
9c03036a | 433 | { |
853713a7 DE |
434 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); |
435 | disassemble_info *info = dis_info; | |
436 | const unsigned char *syn; | |
9c03036a DE |
437 | |
438 | CGEN_INIT_PRINT (); | |
439 | ||
853713a7 | 440 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) |
9c03036a | 441 | { |
853713a7 | 442 | if (CGEN_SYNTAX_MNEMONIC_P (*syn)) |
23cf992f | 443 | { |
853713a7 | 444 | (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); |
23cf992f NC |
445 | continue; |
446 | } | |
853713a7 | 447 | if (CGEN_SYNTAX_CHAR_P (*syn)) |
9c03036a | 448 | { |
853713a7 | 449 | (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); |
9c03036a DE |
450 | continue; |
451 | } | |
452 | ||
453 | /* We have an operand. */ | |
853713a7 | 454 | m32r_cgen_print_operand (CGEN_SYNTAX_FIELD (*syn), info, |
9c03036a DE |
455 | fields, CGEN_INSN_ATTRS (insn), pc, length); |
456 | } | |
457 | } | |
458 | \f | |
459 | /* Default value for CGEN_PRINT_INSN. | |
5d07b6cf | 460 | Given BUFLEN bits (target byte order) read into BUF, look up the |
9c03036a DE |
461 | insn in the instruction table and disassemble it. |
462 | ||
463 | The result is the size of the insn in bytes. */ | |
464 | ||
465 | #ifndef CGEN_PRINT_INSN | |
466 | #define CGEN_PRINT_INSN print_insn | |
467 | #endif | |
468 | ||
469 | static int | |
470 | print_insn (pc, info, buf, buflen) | |
853713a7 DE |
471 | bfd_vma pc; |
472 | disassemble_info *info; | |
473 | char *buf; | |
474 | int buflen; | |
9c03036a | 475 | { |
853713a7 DE |
476 | int i; |
477 | unsigned long insn_value; | |
478 | const CGEN_INSN_LIST *insn_list; | |
479 | ||
9c03036a DE |
480 | switch (buflen) |
481 | { | |
482 | case 8: | |
483 | insn_value = buf[0]; | |
484 | break; | |
485 | case 16: | |
486 | insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf); | |
487 | break; | |
488 | case 32: | |
489 | insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf); | |
490 | break; | |
491 | default: | |
492 | abort (); | |
493 | } | |
494 | ||
495 | /* The instructions are stored in hash lists. | |
496 | Pick the first one and keep trying until we find the right one. */ | |
497 | ||
498 | insn_list = CGEN_DIS_LOOKUP_INSN (buf, insn_value); | |
499 | while (insn_list != NULL) | |
500 | { | |
853713a7 DE |
501 | const CGEN_INSN *insn = insn_list->insn; |
502 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
503 | CGEN_FIELDS fields; | |
504 | int length; | |
9c03036a DE |
505 | |
506 | #if 0 /* not needed as insn shouldn't be in hash lists if not supported */ | |
507 | /* Supported by this cpu? */ | |
508 | if (! m32r_cgen_insn_supported (insn)) | |
509 | continue; | |
510 | #endif | |
511 | ||
512 | /* Basic bit mask must be correct. */ | |
513 | /* ??? May wish to allow target to defer this check until the extract | |
514 | handler. */ | |
853713a7 | 515 | if ((insn_value & CGEN_INSN_MASK (insn)) == CGEN_INSN_VALUE (insn)) |
9c03036a DE |
516 | { |
517 | /* Printing is handled in two passes. The first pass parses the | |
518 | machine insn and extracts the fields. The second pass prints | |
519 | them. */ | |
520 | ||
853713a7 | 521 | length = (*CGEN_EXTRACT_FN (insn)) (insn, NULL, insn_value, &fields); |
9c03036a DE |
522 | if (length > 0) |
523 | { | |
853713a7 | 524 | (*CGEN_PRINT_FN (insn)) (info, insn, &fields, pc, length); |
9c03036a | 525 | /* length is in bits, result is in bytes */ |
853713a7 | 526 | return length / 8; |
9c03036a DE |
527 | } |
528 | } | |
853713a7 | 529 | |
9c03036a DE |
530 | insn_list = CGEN_DIS_NEXT_INSN (insn_list); |
531 | } | |
532 | ||
853713a7 | 533 | return 0; |
9c03036a DE |
534 | } |
535 | ||
536 | /* Main entry point. | |
537 | Print one instruction from PC on INFO->STREAM. | |
538 | Return the size of the instruction (in bytes). */ | |
539 | ||
540 | int | |
541 | print_insn_m32r (pc, info) | |
853713a7 DE |
542 | bfd_vma pc; |
543 | disassemble_info *info; | |
9c03036a | 544 | { |
853713a7 DE |
545 | char buffer[CGEN_MAX_INSN_SIZE]; |
546 | int status, length; | |
547 | static int initialized = 0; | |
548 | static int current_mach = 0; | |
549 | static int current_big_p = 0; | |
550 | int mach = info->mach; | |
551 | int big_p = info->endian == BFD_ENDIAN_BIG; | |
9c03036a DE |
552 | |
553 | /* If we haven't initialized yet, or if we've switched cpu's, initialize. */ | |
853713a7 | 554 | if (!initialized || mach != current_mach || big_p != current_big_p) |
9c03036a | 555 | { |
853713a7 DE |
556 | initialized = 1; |
557 | current_mach = mach; | |
558 | current_big_p = big_p; | |
559 | m32r_cgen_init_dis (mach, big_p ? CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE); | |
9c03036a DE |
560 | } |
561 | ||
562 | /* Read enough of the insn so we can look it up in the hash lists. */ | |
563 | ||
853713a7 | 564 | status = (*info->read_memory_func) (pc, buffer, CGEN_BASE_INSN_SIZE, info); |
9c03036a DE |
565 | if (status != 0) |
566 | { | |
853713a7 | 567 | (*info->memory_error_func) (status, pc, info); |
9c03036a DE |
568 | return -1; |
569 | } | |
570 | ||
571 | /* We try to have as much common code as possible. | |
572 | But at this point some targets need to take over. */ | |
573 | /* ??? Some targets may need a hook elsewhere. Try to avoid this, | |
23cf992f | 574 | but if not possible try to move this hook elsewhere rather than |
9c03036a DE |
575 | have two hooks. */ |
576 | length = CGEN_PRINT_INSN (pc, info, buffer, CGEN_BASE_INSN_BITSIZE); | |
577 | if (length) | |
578 | return length; | |
579 | ||
853713a7 | 580 | (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); |
9c03036a DE |
581 | return CGEN_DEFAULT_INSN_SIZE; |
582 | } |