1 /* Disassembler interface for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
4 This file is used to generate m32r-dis.c.
6 Copyright (C) 1996, 1997 Free Software Foundation, Inc.
8 This file is part of the GNU Binutils and GDB, the GNU debugger.
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)
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.
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. */
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.
38 /* Default text to print if an instruction isn't recognized. */
39 #define UNKNOWN_INSN_MSG "*unknown*"
41 /* FIXME: Machine generate. */
42 #ifndef CGEN_PCREL_OFFSET
43 #define CGEN_PCREL_OFFSET 0
46 static int print_insn PARAMS ((bfd_vma, disassemble_info *, char *, int));
48 static int extract_insn_normal
49 PARAMS ((const CGEN_INSN *, void *, cgen_insn_t, CGEN_FIELDS *));
50 static void print_insn_normal
51 PARAMS ((void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int));
53 /* Default extraction routine.
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. */
59 extract_normal (buf_ctrl, insn_value, attrs, start, length, shift, total_length, valuep)
61 cgen_insn_t insn_value;
63 int start, length, shift, total_length;
70 value = ((insn_value >> (CGEN_BASE_INSN_BITSIZE - (start + length)))
71 & ((1 << length) - 1));
73 value = ((insn_value >> (total_length - (start + length)))
74 & ((1 << length) - 1));
76 if (! (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_UNSIGNED))
77 && (value & (1 << (length - 1))))
80 /* FIXME: unfinished */
83 /* This is backwards as we undo the effects of insert_normal. */
93 /* Default print handler. */
96 print_normal (dis_info, value, attrs, pc, length)
100 unsigned long pc; /* FIXME: should be bfd_vma */
103 disassemble_info *info = dis_info;
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);
117 (*info->fprintf_func) (info->stream, "%ld", value);
120 /* Keyword print handler. */
123 print_keyword (dis_info, keyword_table, value, attrs)
125 CGEN_KEYWORD *keyword_table;
129 disassemble_info *info = dis_info;
130 const CGEN_KEYWORD_ENTRY *ke;
132 ke = cgen_keyword_lookup_value (keyword_table, value);
134 (*info->fprintf_func) (info->stream, "%s", ke->name);
136 (*info->fprintf_func) (info->stream, "???");
139 /* -- disassembler routines inserted here */
142 #undef CGEN_PRINT_INSN
143 #define CGEN_PRINT_INSN my_print_insn
146 my_print_insn (pc, info, buf, buflen)
148 disassemble_info *info;
153 if ((pc & 3) == 0 && (buf[0] & 0x80) != 0)
154 return print_insn (pc, info, buf, buflen);
156 /* Print the first insn. */
159 if (print_insn (pc, info, buf, 16) == 0)
160 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
167 (*info->fprintf_func) (info->stream, " || ");
171 (*info->fprintf_func) (info->stream, " -> ");
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);
178 return (pc & 3) ? 2 : 4;
183 /* Main entry point for operand extraction.
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.
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
198 m32r_cgen_extract_operand (opindex, buf_ctrl, insn_value, fields)
201 cgen_insn_t insn_value;
202 CGEN_FIELDS * fields;
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);
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);
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);
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);
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);
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);
226 case M32R_OPERAND_SIMM8 :
227 length = extract_normal (NULL /*FIXME*/, insn_value, 0, 8, 8, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_simm8);
229 case M32R_OPERAND_SIMM16 :
230 length = extract_normal (NULL /*FIXME*/, insn_value, 0, 16, 16, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_simm16);
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);
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);
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);
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);
244 case M32R_OPERAND_SLO16 :
245 length = extract_normal (NULL /*FIXME*/, insn_value, 0, 16, 16, 0, CGEN_FIELDS_BITSIZE (fields), & fields->f_simm16);
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);
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);
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);
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);
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);
264 fprintf (stderr, "Unrecognized field %d while decoding insn.\n",
272 /* Main entry point for printing operands.
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.
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
287 m32r_cgen_print_operand (opindex, info, fields, attrs, pc, length)
289 disassemble_info * info;
290 CGEN_FIELDS * fields;
297 case M32R_OPERAND_SR :
298 print_keyword (info, & m32r_cgen_opval_h_gr, fields->f_r2, 0|(1<<CGEN_OPERAND_UNSIGNED));
300 case M32R_OPERAND_DR :
301 print_keyword (info, & m32r_cgen_opval_h_gr, fields->f_r1, 0|(1<<CGEN_OPERAND_UNSIGNED));
303 case M32R_OPERAND_SRC1 :
304 print_keyword (info, & m32r_cgen_opval_h_gr, fields->f_r1, 0|(1<<CGEN_OPERAND_UNSIGNED));
306 case M32R_OPERAND_SRC2 :
307 print_keyword (info, & m32r_cgen_opval_h_gr, fields->f_r2, 0|(1<<CGEN_OPERAND_UNSIGNED));
309 case M32R_OPERAND_SCR :
310 print_keyword (info, & m32r_cgen_opval_h_cr, fields->f_r2, 0|(1<<CGEN_OPERAND_UNSIGNED));
312 case M32R_OPERAND_DCR :
313 print_keyword (info, & m32r_cgen_opval_h_cr, fields->f_r1, 0|(1<<CGEN_OPERAND_UNSIGNED));
315 case M32R_OPERAND_SIMM8 :
316 print_normal (info, fields->f_simm8, 0, pc, length);
318 case M32R_OPERAND_SIMM16 :
319 print_normal (info, fields->f_simm16, 0, pc, length);
321 case M32R_OPERAND_UIMM4 :
322 print_normal (info, fields->f_uimm4, 0|(1<<CGEN_OPERAND_UNSIGNED), pc, length);
324 case M32R_OPERAND_UIMM5 :
325 print_normal (info, fields->f_uimm5, 0|(1<<CGEN_OPERAND_UNSIGNED), pc, length);
327 case M32R_OPERAND_UIMM16 :
328 print_normal (info, fields->f_uimm16, 0|(1<<CGEN_OPERAND_UNSIGNED), pc, length);
330 case M32R_OPERAND_HI16 :
331 print_normal (info, fields->f_hi16, 0|(1<<CGEN_OPERAND_SIGN_OPT)|(1<<CGEN_OPERAND_UNSIGNED), pc, length);
333 case M32R_OPERAND_SLO16 :
334 print_normal (info, fields->f_simm16, 0, pc, length);
336 case M32R_OPERAND_ULO16 :
337 print_normal (info, fields->f_uimm16, 0|(1<<CGEN_OPERAND_UNSIGNED), pc, length);
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);
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);
345 case M32R_OPERAND_DISP16 :
346 print_normal (info, fields->f_disp16, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
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);
353 fprintf (stderr, "Unrecognized field %d while printing insn.\n",
359 cgen_extract_fn * m32r_cgen_extract_handlers[] =
365 cgen_print_fn * m32r_cgen_print_handlers[] =
373 m32r_cgen_init_dis (mach, endian)
375 enum cgen_endian endian;
377 m32r_cgen_init_tables (mach);
378 cgen_set_cpu (& m32r_cgen_opcode_data, mach, endian);
383 /* Default insn extractor.
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. */
390 extract_insn_normal (insn, buf_ctrl, insn_value, fields)
391 const CGEN_INSN *insn;
393 cgen_insn_t insn_value;
396 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
397 const unsigned char *syn;
399 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
401 CGEN_INIT_EXTRACT ();
403 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
407 if (CGEN_SYNTAX_CHAR_P (*syn))
410 length = m32r_cgen_extract_operand (CGEN_SYNTAX_FIELD (*syn),
411 buf_ctrl, insn_value, fields);
416 /* We recognized and successfully extracted this insn. */
417 return CGEN_INSN_BITSIZE (insn);
420 /* Default insn printer.
422 DIS_INFO is defined as `void *' so the disassembler needn't know anything
423 about disassemble_info.
427 print_insn_normal (dis_info, insn, fields, pc, length)
429 const CGEN_INSN *insn;
434 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
435 disassemble_info *info = dis_info;
436 const unsigned char *syn;
440 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
442 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
444 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
447 if (CGEN_SYNTAX_CHAR_P (*syn))
449 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
453 /* We have an operand. */
454 m32r_cgen_print_operand (CGEN_SYNTAX_FIELD (*syn), info,
455 fields, CGEN_INSN_ATTRS (insn), pc, length);
459 /* Default value for CGEN_PRINT_INSN.
460 Given BUFLEN bits (target byte order) read into BUF, look up the
461 insn in the instruction table and disassemble it.
463 The result is the size of the insn in bytes. */
465 #ifndef CGEN_PRINT_INSN
466 #define CGEN_PRINT_INSN print_insn
470 print_insn (pc, info, buf, buflen)
472 disassemble_info *info;
477 unsigned long insn_value;
478 const CGEN_INSN_LIST *insn_list;
486 insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf);
489 insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf);
495 /* The instructions are stored in hash lists.
496 Pick the first one and keep trying until we find the right one. */
498 insn_list = CGEN_DIS_LOOKUP_INSN (buf, insn_value);
499 while (insn_list != NULL)
501 const CGEN_INSN *insn = insn_list->insn;
502 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
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))
512 /* Basic bit mask must be correct. */
513 /* ??? May wish to allow target to defer this check until the extract
515 if ((insn_value & CGEN_INSN_MASK (insn)) == CGEN_INSN_VALUE (insn))
517 /* Printing is handled in two passes. The first pass parses the
518 machine insn and extracts the fields. The second pass prints
521 length = (*CGEN_EXTRACT_FN (insn)) (insn, NULL, insn_value, &fields);
524 (*CGEN_PRINT_FN (insn)) (info, insn, &fields, pc, length);
525 /* length is in bits, result is in bytes */
530 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
537 Print one instruction from PC on INFO->STREAM.
538 Return the size of the instruction (in bytes). */
541 print_insn_m32r (pc, info)
543 disassemble_info *info;
545 char buffer[CGEN_MAX_INSN_SIZE];
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;
553 /* If we haven't initialized yet, or if we've switched cpu's, initialize. */
554 if (!initialized || mach != current_mach || big_p != current_big_p)
558 current_big_p = big_p;
559 m32r_cgen_init_dis (mach, big_p ? CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE);
562 /* Read enough of the insn so we can look it up in the hash lists. */
564 status = (*info->read_memory_func) (pc, buffer, CGEN_BASE_INSN_SIZE, info);
567 (*info->memory_error_func) (status, pc, info);
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,
574 but if not possible try to move this hook elsewhere rather than
576 length = CGEN_PRINT_INSN (pc, info, buffer, CGEN_BASE_INSN_BITSIZE);
580 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
581 return CGEN_DEFAULT_INSN_SIZE;