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 1996, 1997, 1998, 1999, 2000, 2001 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 "xstormy16-desc.h"
35 #include "xstormy16-opc.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 *,
51 PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *, char *, unsigned));
52 static int default_print_insn
53 PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *));
55 PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *, char *, int,
56 CGEN_EXTRACT_INFO *, unsigned long *));
58 /* -- disassembler routines inserted here */
61 void xstormy16_cgen_print_operand
62 PARAMS ((CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *,
63 void const *, bfd_vma, int));
65 /* Main entry point for printing operands.
66 XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
67 of dis-asm.h on cgen.h.
69 This function is basically just a big switch statement. Earlier versions
70 used tables to look up the function to use, but
71 - if the table contains both assembler and disassembler functions then
72 the disassembler contains much of the assembler and vice-versa,
73 - there's a lot of inlining possibilities as things grow,
74 - using a switch statement avoids the function call overhead.
76 This function could be moved into `print_insn_normal', but keeping it
77 separate makes clear the interface between `print_insn_normal' and each of
81 xstormy16_cgen_print_operand (cd, opindex, xinfo, fields, attrs, pc, length)
86 void const *attrs ATTRIBUTE_UNUSED;
90 disassemble_info *info = (disassemble_info *) xinfo;
94 case XSTORMY16_OPERAND_RB :
95 print_keyword (cd, info, & xstormy16_cgen_opval_gr_Rb_names, fields->f_Rb, 0);
97 case XSTORMY16_OPERAND_RBJ :
98 print_keyword (cd, info, & xstormy16_cgen_opval_gr_Rb_names, fields->f_Rbj, 0);
100 case XSTORMY16_OPERAND_RD :
101 print_keyword (cd, info, & xstormy16_cgen_opval_gr_names, fields->f_Rd, 0);
103 case XSTORMY16_OPERAND_RDM :
104 print_keyword (cd, info, & xstormy16_cgen_opval_gr_names, fields->f_Rdm, 0);
106 case XSTORMY16_OPERAND_RM :
107 print_keyword (cd, info, & xstormy16_cgen_opval_gr_names, fields->f_Rm, 0);
109 case XSTORMY16_OPERAND_RS :
110 print_keyword (cd, info, & xstormy16_cgen_opval_gr_names, fields->f_Rs, 0);
112 case XSTORMY16_OPERAND_ABS24 :
113 print_normal (cd, info, fields->f_abs24, 0|(1<<CGEN_OPERAND_ABS_ADDR)|(1<<CGEN_OPERAND_VIRTUAL), pc, length);
115 case XSTORMY16_OPERAND_BCOND2 :
116 print_keyword (cd, info, & xstormy16_cgen_opval_h_branchcond, fields->f_op2, 0);
118 case XSTORMY16_OPERAND_BCOND5 :
119 print_keyword (cd, info, & xstormy16_cgen_opval_h_branchcond, fields->f_op5, 0);
121 case XSTORMY16_OPERAND_HMEM8 :
122 print_normal (cd, info, fields->f_hmem8, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
124 case XSTORMY16_OPERAND_IMM12 :
125 print_normal (cd, info, fields->f_imm12, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
127 case XSTORMY16_OPERAND_IMM16 :
128 print_normal (cd, info, fields->f_imm16, 0|(1<<CGEN_OPERAND_SIGN_OPT), pc, length);
130 case XSTORMY16_OPERAND_IMM2 :
131 print_normal (cd, info, fields->f_imm2, 0, pc, length);
133 case XSTORMY16_OPERAND_IMM3 :
134 print_normal (cd, info, fields->f_imm3, 0, pc, length);
136 case XSTORMY16_OPERAND_IMM3B :
137 print_normal (cd, info, fields->f_imm3b, 0, pc, length);
139 case XSTORMY16_OPERAND_IMM4 :
140 print_normal (cd, info, fields->f_imm4, 0, pc, length);
142 case XSTORMY16_OPERAND_IMM8 :
143 print_normal (cd, info, fields->f_imm8, 0, pc, length);
145 case XSTORMY16_OPERAND_IMM8SMALL :
146 print_normal (cd, info, fields->f_imm8, 0, pc, length);
148 case XSTORMY16_OPERAND_LMEM8 :
149 print_normal (cd, info, fields->f_lmem8, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
151 case XSTORMY16_OPERAND_REL12 :
152 print_normal (cd, info, fields->f_rel12, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
154 case XSTORMY16_OPERAND_REL12A :
155 print_normal (cd, info, fields->f_rel12a, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
157 case XSTORMY16_OPERAND_REL8_2 :
158 print_normal (cd, info, fields->f_rel8_2, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
160 case XSTORMY16_OPERAND_REL8_4 :
161 print_normal (cd, info, fields->f_rel8_4, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
163 case XSTORMY16_OPERAND_WS2 :
164 print_keyword (cd, info, & xstormy16_cgen_opval_h_wordsize, fields->f_op2m, 0);
168 /* xgettext:c-format */
169 fprintf (stderr, _("Unrecognized field %d while printing insn.\n"),
175 cgen_print_fn * const xstormy16_cgen_print_handlers[] =
182 xstormy16_cgen_init_dis (cd)
185 xstormy16_cgen_init_opcode_table (cd);
186 xstormy16_cgen_init_ibld_table (cd);
187 cd->print_handlers = & xstormy16_cgen_print_handlers[0];
188 cd->print_operand = xstormy16_cgen_print_operand;
192 /* Default print handler. */
195 print_normal (cd, dis_info, value, attrs, pc, length)
196 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
200 bfd_vma pc ATTRIBUTE_UNUSED;
201 int length ATTRIBUTE_UNUSED;
203 disassemble_info *info = (disassemble_info *) dis_info;
205 #ifdef CGEN_PRINT_NORMAL
206 CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
209 /* Print the operand as directed by the attributes. */
210 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
211 ; /* nothing to do */
212 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
213 (*info->fprintf_func) (info->stream, "%ld", value);
215 (*info->fprintf_func) (info->stream, "0x%lx", value);
218 /* Default address handler. */
221 print_address (cd, dis_info, value, attrs, pc, length)
222 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
226 bfd_vma pc ATTRIBUTE_UNUSED;
227 int length ATTRIBUTE_UNUSED;
229 disassemble_info *info = (disassemble_info *) dis_info;
231 #ifdef CGEN_PRINT_ADDRESS
232 CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
235 /* Print the operand as directed by the attributes. */
236 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
237 ; /* nothing to do */
238 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
239 (*info->print_address_func) (value, info);
240 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
241 (*info->print_address_func) (value, info);
242 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
243 (*info->fprintf_func) (info->stream, "%ld", (long) value);
245 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
248 /* Keyword print handler. */
251 print_keyword (cd, dis_info, keyword_table, value, attrs)
252 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
254 CGEN_KEYWORD *keyword_table;
256 unsigned int attrs ATTRIBUTE_UNUSED;
258 disassemble_info *info = (disassemble_info *) dis_info;
259 const CGEN_KEYWORD_ENTRY *ke;
261 ke = cgen_keyword_lookup_value (keyword_table, value);
263 (*info->fprintf_func) (info->stream, "%s", ke->name);
265 (*info->fprintf_func) (info->stream, "???");
268 /* Default insn printer.
270 DIS_INFO is defined as `PTR' so the disassembler needn't know anything
271 about disassemble_info. */
274 print_insn_normal (cd, dis_info, insn, fields, pc, length)
277 const CGEN_INSN *insn;
282 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
283 disassemble_info *info = (disassemble_info *) dis_info;
284 const CGEN_SYNTAX_CHAR_TYPE *syn;
286 CGEN_INIT_PRINT (cd);
288 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
290 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
292 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
295 if (CGEN_SYNTAX_CHAR_P (*syn))
297 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
301 /* We have an operand. */
302 xstormy16_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
303 fields, CGEN_INSN_ATTRS (insn), pc, length);
307 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
309 Returns 0 if all is well, non-zero otherwise. */
312 read_insn (cd, pc, info, buf, buflen, ex_info, insn_value)
313 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
315 disassemble_info *info;
318 CGEN_EXTRACT_INFO *ex_info;
319 unsigned long *insn_value;
321 int status = (*info->read_memory_func) (pc, buf, buflen, info);
324 (*info->memory_error_func) (status, pc, info);
328 ex_info->dis_info = info;
329 ex_info->valid = (1 << buflen) - 1;
330 ex_info->insn_bytes = buf;
332 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
336 /* Utility to print an insn.
337 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
338 The result is the size of the insn in bytes or zero for an unknown insn
339 or -1 if an error occurs fetching data (memory_error_func will have
343 print_insn (cd, pc, info, buf, buflen)
346 disassemble_info *info;
350 CGEN_INSN_INT insn_value;
351 const CGEN_INSN_LIST *insn_list;
352 CGEN_EXTRACT_INFO ex_info;
355 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
356 basesize = cd->base_insn_bitsize < buflen * 8 ?
357 cd->base_insn_bitsize : buflen * 8;
358 insn_value = cgen_get_insn_value (cd, buf, basesize);
361 /* Fill in ex_info fields like read_insn would. Don't actually call
362 read_insn, since the incoming buffer is already read (and possibly
363 modified a la m32r). */
364 ex_info.valid = (1 << buflen) - 1;
365 ex_info.dis_info = info;
366 ex_info.insn_bytes = buf;
368 /* The instructions are stored in hash lists.
369 Pick the first one and keep trying until we find the right one. */
371 insn_list = CGEN_DIS_LOOKUP_INSN (cd, buf, insn_value);
372 while (insn_list != NULL)
374 const CGEN_INSN *insn = insn_list->insn;
377 unsigned long insn_value_cropped;
379 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
380 /* Not needed as insn shouldn't be in hash lists if not supported. */
381 /* Supported by this cpu? */
382 if (! xstormy16_cgen_insn_supported (cd, insn))
384 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
389 /* Basic bit mask must be correct. */
390 /* ??? May wish to allow target to defer this check until the extract
393 /* Base size may exceed this instruction's size. Extract the
394 relevant part from the buffer. */
395 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
396 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
397 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
398 info->endian == BFD_ENDIAN_BIG);
400 insn_value_cropped = insn_value;
402 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
403 == CGEN_INSN_BASE_VALUE (insn))
405 /* Printing is handled in two passes. The first pass parses the
406 machine insn and extracts the fields. The second pass prints
409 /* Make sure the entire insn is loaded into insn_value, if it
411 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
412 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
414 unsigned long full_insn_value;
415 int rc = read_insn (cd, pc, info, buf,
416 CGEN_INSN_BITSIZE (insn) / 8,
417 & ex_info, & full_insn_value);
420 length = CGEN_EXTRACT_FN (cd, insn)
421 (cd, insn, &ex_info, full_insn_value, &fields, pc);
424 length = CGEN_EXTRACT_FN (cd, insn)
425 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
427 /* length < 0 -> error */
432 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
433 /* length is in bits, result is in bytes */
438 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
444 /* Default value for CGEN_PRINT_INSN.
445 The result is the size of the insn in bytes or zero for an unknown insn
446 or -1 if an error occured fetching bytes. */
448 #ifndef CGEN_PRINT_INSN
449 #define CGEN_PRINT_INSN default_print_insn
453 default_print_insn (cd, pc, info)
456 disassemble_info *info;
458 char buf[CGEN_MAX_INSN_SIZE];
462 /* Attempt to read the base part of the insn. */
463 buflen = cd->base_insn_bitsize / 8;
464 status = (*info->read_memory_func) (pc, buf, buflen, info);
466 /* Try again with the minimum part, if min < base. */
467 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
469 buflen = cd->min_insn_bitsize / 8;
470 status = (*info->read_memory_func) (pc, buf, buflen, info);
475 (*info->memory_error_func) (status, pc, info);
479 return print_insn (cd, pc, info, buf, buflen);
483 Print one instruction from PC on INFO->STREAM.
484 Return the size of the instruction (in bytes). */
487 print_insn_xstormy16 (pc, info)
489 disassemble_info *info;
491 static CGEN_CPU_DESC cd = 0;
493 static int prev_mach;
494 static int prev_endian;
497 int endian = (info->endian == BFD_ENDIAN_BIG
499 : CGEN_ENDIAN_LITTLE);
500 enum bfd_architecture arch;
502 /* ??? gdb will set mach but leave the architecture as "unknown" */
503 #ifndef CGEN_BFD_ARCH
504 #define CGEN_BFD_ARCH bfd_arch_xstormy16
507 if (arch == bfd_arch_unknown)
508 arch = CGEN_BFD_ARCH;
510 /* There's no standard way to compute the machine or isa number
511 so we leave it to the target. */
512 #ifdef CGEN_COMPUTE_MACH
513 mach = CGEN_COMPUTE_MACH (info);
518 #ifdef CGEN_COMPUTE_ISA
519 isa = CGEN_COMPUTE_ISA (info);
524 /* If we've switched cpu's, close the current table and open a new one. */
528 || endian != prev_endian))
530 xstormy16_cgen_cpu_close (cd);
534 /* If we haven't initialized yet, initialize the opcode table. */
537 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
538 const char *mach_name;
542 mach_name = arch_type->printable_name;
546 prev_endian = endian;
547 cd = xstormy16_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
548 CGEN_CPU_OPEN_BFDMACH, mach_name,
549 CGEN_CPU_OPEN_ENDIAN, prev_endian,
553 xstormy16_cgen_init_dis (cd);
556 /* We try to have as much common code as possible.
557 But at this point some targets need to take over. */
558 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
559 but if not possible try to move this hook elsewhere rather than
561 length = CGEN_PRINT_INSN (cd, pc, info);
567 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
568 return cd->default_insn_bitsize / 8;