1 /* Disassembler interface for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
4 THIS FILE IS MACHINE GENERATED WITH CGEN.
5 - the resultant file is machine generated, cgen-dis.in isn't
7 Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
9 This file is part of the GNU Binutils and GDB, the GNU debugger.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2, or (at your option)
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software Foundation, Inc.,
23 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
34 #include "m32r-desc.h"
38 /* Default text to print if an instruction isn't recognized. */
39 #define UNKNOWN_INSN_MSG _("*unknown*")
41 static void print_normal
42 PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned int, bfd_vma, int));
43 static void print_address
44 PARAMS ((CGEN_CPU_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int));
45 static void print_keyword
46 PARAMS ((CGEN_CPU_DESC, PTR, CGEN_KEYWORD *, long, unsigned int));
47 static void print_insn_normal
48 PARAMS ((CGEN_CPU_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *,
50 static int print_insn PARAMS ((CGEN_CPU_DESC, bfd_vma,
51 disassemble_info *, char *, int));
52 static int default_print_insn
53 PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *));
55 /* -- disassembler routines inserted here */
59 /* Immediate values are prefixed with '#'. */
61 #define CGEN_PRINT_NORMAL(cd, info, value, attrs, pc, length) \
63 if (CGEN_BOOL_ATTR ((attrs), CGEN_OPERAND_HASH_PREFIX)) \
64 (*info->fprintf_func) (info->stream, "#"); \
67 /* Handle '#' prefixes as operands. */
70 print_hash (cd, dis_info, value, attrs, pc, length)
78 disassemble_info *info = (disassemble_info *) dis_info;
79 (*info->fprintf_func) (info->stream, "#");
82 #undef CGEN_PRINT_INSN
83 #define CGEN_PRINT_INSN my_print_insn
86 my_print_insn (cd, pc, info)
89 disassemble_info *info;
91 char buffer[CGEN_MAX_INSN_SIZE];
94 int buflen = (pc & 3) == 0 ? 4 : 2;
96 /* Read the base part of the insn. */
98 status = (*info->read_memory_func) (pc, buf, buflen, info);
101 (*info->memory_error_func) (status, pc, info);
106 if ((pc & 3) == 0 && (buf[0] & 0x80) != 0)
107 return print_insn (cd, pc, info, buf, buflen);
109 /* Print the first insn. */
112 if (print_insn (cd, pc, info, buf, 2) == 0)
113 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
120 (*info->fprintf_func) (info->stream, " || ");
124 (*info->fprintf_func) (info->stream, " -> ");
126 /* The "& 3" is to pass a consistent address.
127 Parallel insns arguably both begin on the word boundary.
128 Also, branch insns are calculated relative to the word boundary. */
129 if (print_insn (cd, pc & ~ (bfd_vma) 3, info, buf, 2) == 0)
130 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
132 return (pc & 3) ? 2 : 4;
137 /* Main entry point for printing operands.
138 XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
139 of dis-asm.h on cgen.h.
141 This function is basically just a big switch statement. Earlier versions
142 used tables to look up the function to use, but
143 - if the table contains both assembler and disassembler functions then
144 the disassembler contains much of the assembler and vice-versa,
145 - there's a lot of inlining possibilities as things grow,
146 - using a switch statement avoids the function call overhead.
148 This function could be moved into `print_insn_normal', but keeping it
149 separate makes clear the interface between `print_insn_normal' and each of
154 m32r_cgen_print_operand (cd, opindex, xinfo, fields, attrs, pc, length)
163 disassemble_info *info = (disassemble_info *) xinfo;
167 case M32R_OPERAND_DCR :
168 print_keyword (cd, info, & m32r_cgen_opval_cr_names, fields->f_r1, 0);
170 case M32R_OPERAND_DISP16 :
171 print_address (cd, info, fields->f_disp16, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
173 case M32R_OPERAND_DISP24 :
174 print_address (cd, info, fields->f_disp24, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
176 case M32R_OPERAND_DISP8 :
177 print_address (cd, info, fields->f_disp8, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
179 case M32R_OPERAND_DR :
180 print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r1, 0);
182 case M32R_OPERAND_HASH :
183 print_hash (cd, info, fields->f_nil, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
185 case M32R_OPERAND_HI16 :
186 print_normal (cd, info, fields->f_hi16, 0|(1<<CGEN_OPERAND_SIGN_OPT), pc, length);
188 case M32R_OPERAND_SCR :
189 print_keyword (cd, info, & m32r_cgen_opval_cr_names, fields->f_r2, 0);
191 case M32R_OPERAND_SIMM16 :
192 print_normal (cd, info, fields->f_simm16, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
194 case M32R_OPERAND_SIMM8 :
195 print_normal (cd, info, fields->f_simm8, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
197 case M32R_OPERAND_SLO16 :
198 print_normal (cd, info, fields->f_simm16, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
200 case M32R_OPERAND_SR :
201 print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r2, 0);
203 case M32R_OPERAND_SRC1 :
204 print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r1, 0);
206 case M32R_OPERAND_SRC2 :
207 print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r2, 0);
209 case M32R_OPERAND_UIMM16 :
210 print_normal (cd, info, fields->f_uimm16, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
212 case M32R_OPERAND_UIMM24 :
213 print_address (cd, info, fields->f_uimm24, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
215 case M32R_OPERAND_UIMM4 :
216 print_normal (cd, info, fields->f_uimm4, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
218 case M32R_OPERAND_UIMM5 :
219 print_normal (cd, info, fields->f_uimm5, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
221 case M32R_OPERAND_ULO16 :
222 print_normal (cd, info, fields->f_uimm16, 0, pc, length);
226 /* xgettext:c-format */
227 fprintf (stderr, _("Unrecognized field %d while printing insn.\n"),
233 cgen_print_fn * const m32r_cgen_print_handlers[] =
240 m32r_cgen_init_dis (cd)
243 m32r_cgen_init_opcode_table (cd);
244 m32r_cgen_init_ibld_table (cd);
245 cd->print_handlers = & m32r_cgen_print_handlers[0];
246 cd->print_operand = m32r_cgen_print_operand;
250 /* Default print handler. */
253 print_normal (cd, dis_info, value, attrs, pc, length)
261 disassemble_info *info = (disassemble_info *) dis_info;
263 #ifdef CGEN_PRINT_NORMAL
264 CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
267 /* Print the operand as directed by the attributes. */
268 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
269 ; /* nothing to do */
270 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
271 (*info->fprintf_func) (info->stream, "%ld", value);
273 (*info->fprintf_func) (info->stream, "0x%lx", value);
276 /* Default address handler. */
279 print_address (cd, dis_info, value, attrs, pc, length)
287 disassemble_info *info = (disassemble_info *) dis_info;
289 #ifdef CGEN_PRINT_ADDRESS
290 CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
293 /* Print the operand as directed by the attributes. */
294 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
295 ; /* nothing to do */
296 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
297 (*info->print_address_func) (value, info);
298 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
299 (*info->print_address_func) (value, info);
300 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
301 (*info->fprintf_func) (info->stream, "%ld", (long) value);
303 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
306 /* Keyword print handler. */
309 print_keyword (cd, dis_info, keyword_table, value, attrs)
312 CGEN_KEYWORD *keyword_table;
316 disassemble_info *info = (disassemble_info *) dis_info;
317 const CGEN_KEYWORD_ENTRY *ke;
319 ke = cgen_keyword_lookup_value (keyword_table, value);
321 (*info->fprintf_func) (info->stream, "%s", ke->name);
323 (*info->fprintf_func) (info->stream, "???");
326 /* Default insn printer.
328 DIS_INFO is defined as `PTR' so the disassembler needn't know anything
329 about disassemble_info. */
332 print_insn_normal (cd, dis_info, insn, fields, pc, length)
335 const CGEN_INSN *insn;
340 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
341 disassemble_info *info = (disassemble_info *) dis_info;
342 const unsigned char *syn;
344 CGEN_INIT_PRINT (cd);
346 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
348 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
350 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
353 if (CGEN_SYNTAX_CHAR_P (*syn))
355 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
359 /* We have an operand. */
360 m32r_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
361 fields, CGEN_INSN_ATTRS (insn), pc, length);
365 /* Utility to print an insn.
366 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
367 The result is the size of the insn in bytes or zero for an unknown insn
368 or -1 if an error occurs fetching data (memory_error_func will have
372 print_insn (cd, pc, info, buf, buflen)
375 disassemble_info *info;
379 unsigned long insn_value;
380 const CGEN_INSN_LIST *insn_list;
381 CGEN_EXTRACT_INFO ex_info;
383 ex_info.dis_info = info;
384 ex_info.valid = (1 << (cd->base_insn_bitsize / 8)) - 1;
385 ex_info.insn_bytes = buf;
393 insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf);
396 insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf);
402 /* The instructions are stored in hash lists.
403 Pick the first one and keep trying until we find the right one. */
405 insn_list = CGEN_DIS_LOOKUP_INSN (cd, buf, insn_value);
406 while (insn_list != NULL)
408 const CGEN_INSN *insn = insn_list->insn;
412 #if 0 /* not needed as insn shouldn't be in hash lists if not supported */
413 /* Supported by this cpu? */
414 if (! m32r_cgen_insn_supported (cd, insn))
418 /* Basic bit mask must be correct. */
419 /* ??? May wish to allow target to defer this check until the extract
421 if ((insn_value & CGEN_INSN_BASE_MASK (insn))
422 == CGEN_INSN_BASE_VALUE (insn))
424 /* Printing is handled in two passes. The first pass parses the
425 machine insn and extracts the fields. The second pass prints
428 length = CGEN_EXTRACT_FN (cd, insn)
429 (cd, insn, &ex_info, insn_value, &fields, pc);
430 /* length < 0 -> error */
435 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
436 /* length is in bits, result is in bytes */
441 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
447 /* Default value for CGEN_PRINT_INSN.
448 The result is the size of the insn in bytes or zero for an unknown insn
449 or -1 if an error occured fetching bytes. */
451 #ifndef CGEN_PRINT_INSN
452 #define CGEN_PRINT_INSN default_print_insn
456 default_print_insn (cd, pc, info)
459 disassemble_info *info;
461 char buf[CGEN_MAX_INSN_SIZE];
464 /* Read the base part of the insn. */
466 status = (*info->read_memory_func) (pc, buf, cd->base_insn_bitsize / 8, info);
469 (*info->memory_error_func) (status, pc, info);
473 return print_insn (cd, pc, info, buf, cd->base_insn_bitsize / 8);
477 Print one instruction from PC on INFO->STREAM.
478 Return the size of the instruction (in bytes). */
481 print_insn_m32r (pc, info)
483 disassemble_info *info;
485 static CGEN_CPU_DESC cd = 0;
486 static prev_isa,prev_mach,prev_endian;
489 int endian = (info->endian == BFD_ENDIAN_BIG
491 : CGEN_ENDIAN_LITTLE);
492 enum bfd_architecture arch;
494 /* ??? gdb will set mach but leave the architecture as "unknown" */
495 #ifndef CGEN_BFD_ARCH
496 #define CGEN_BFD_ARCH bfd_arch_m32r
499 if (arch == bfd_arch_unknown)
500 arch = CGEN_BFD_ARCH;
502 /* There's no standard way to compute the isa number (e.g. for arm thumb)
503 so we leave it to the target. */
504 #ifdef CGEN_COMPUTE_ISA
505 isa = CGEN_COMPUTE_ISA (info);
512 /* If we've switched cpu's, close the current table and open a new one. */
516 || endian != prev_endian))
518 m32r_cgen_cpu_close (cd);
522 /* If we haven't initialized yet, initialize the opcode table. */
525 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
526 const char *mach_name;
530 mach_name = arch_type->printable_name;
534 prev_endian = endian;
535 cd = m32r_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
536 CGEN_CPU_OPEN_BFDMACH, mach_name,
537 CGEN_CPU_OPEN_ENDIAN, prev_endian,
541 m32r_cgen_init_dis (cd);
544 /* We try to have as much common code as possible.
545 But at this point some targets need to take over. */
546 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
547 but if not possible try to move this hook elsewhere rather than
549 length = CGEN_PRINT_INSN (cd, pc, info);
555 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
556 return cd->default_insn_bitsize / 8;