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, 2002, 2003, 2005, 2007
8 Free Software Foundation, Inc.
10 This file is part of libopcodes.
12 This library is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3, or (at your option)
17 It is distributed in the hope that it will be useful, but WITHOUT
18 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
19 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
20 License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software Foundation, Inc.,
24 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
26 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
35 #include "libiberty.h"
36 #include "iq2000-desc.h"
37 #include "iq2000-opc.h"
40 /* Default text to print if an instruction isn't recognized. */
41 #define UNKNOWN_INSN_MSG _("*unknown*")
43 static void print_normal
44 (CGEN_CPU_DESC, void *, long, unsigned int, bfd_vma, int);
45 static void print_address
46 (CGEN_CPU_DESC, void *, bfd_vma, unsigned int, bfd_vma, int) ATTRIBUTE_UNUSED;
47 static void print_keyword
48 (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int) ATTRIBUTE_UNUSED;
49 static void print_insn_normal
50 (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int);
52 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, unsigned);
53 static int default_print_insn
54 (CGEN_CPU_DESC, bfd_vma, disassemble_info *) ATTRIBUTE_UNUSED;
56 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, int, CGEN_EXTRACT_INFO *,
59 /* -- disassembler routines inserted here. */
62 void iq2000_cgen_print_operand
63 (CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, 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 iq2000_cgen_print_operand (CGEN_CPU_DESC cd,
85 void const *attrs ATTRIBUTE_UNUSED,
89 disassemble_info *info = (disassemble_info *) xinfo;
93 case IQ2000_OPERAND__INDEX :
94 print_normal (cd, info, fields->f_index, 0, pc, length);
96 case IQ2000_OPERAND_BASE :
97 print_keyword (cd, info, & iq2000_cgen_opval_gr_names, fields->f_rs, 0);
99 case IQ2000_OPERAND_BASEOFF :
100 print_address (cd, info, fields->f_imm, 0, pc, length);
102 case IQ2000_OPERAND_BITNUM :
103 print_normal (cd, info, fields->f_rt, 0, pc, length);
105 case IQ2000_OPERAND_BYTECOUNT :
106 print_normal (cd, info, fields->f_bytecount, 0, pc, length);
108 case IQ2000_OPERAND_CAM_Y :
109 print_normal (cd, info, fields->f_cam_y, 0, pc, length);
111 case IQ2000_OPERAND_CAM_Z :
112 print_normal (cd, info, fields->f_cam_z, 0, pc, length);
114 case IQ2000_OPERAND_CM_3FUNC :
115 print_normal (cd, info, fields->f_cm_3func, 0, pc, length);
117 case IQ2000_OPERAND_CM_3Z :
118 print_normal (cd, info, fields->f_cm_3z, 0, pc, length);
120 case IQ2000_OPERAND_CM_4FUNC :
121 print_normal (cd, info, fields->f_cm_4func, 0, pc, length);
123 case IQ2000_OPERAND_CM_4Z :
124 print_normal (cd, info, fields->f_cm_4z, 0, pc, length);
126 case IQ2000_OPERAND_COUNT :
127 print_normal (cd, info, fields->f_count, 0, pc, length);
129 case IQ2000_OPERAND_EXECODE :
130 print_normal (cd, info, fields->f_excode, 0, pc, length);
132 case IQ2000_OPERAND_HI16 :
133 print_normal (cd, info, fields->f_imm, 0, pc, length);
135 case IQ2000_OPERAND_IMM :
136 print_normal (cd, info, fields->f_imm, 0, pc, length);
138 case IQ2000_OPERAND_JMPTARG :
139 print_address (cd, info, fields->f_jtarg, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
141 case IQ2000_OPERAND_JMPTARGQ10 :
142 print_address (cd, info, fields->f_jtargq10, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
144 case IQ2000_OPERAND_LO16 :
145 print_normal (cd, info, fields->f_imm, 0, pc, length);
147 case IQ2000_OPERAND_MASK :
148 print_normal (cd, info, fields->f_mask, 0, pc, length);
150 case IQ2000_OPERAND_MASKL :
151 print_normal (cd, info, fields->f_maskl, 0, pc, length);
153 case IQ2000_OPERAND_MASKQ10 :
154 print_normal (cd, info, fields->f_maskq10, 0, pc, length);
156 case IQ2000_OPERAND_MASKR :
157 print_normal (cd, info, fields->f_rs, 0, pc, length);
159 case IQ2000_OPERAND_MLO16 :
160 print_normal (cd, info, fields->f_imm, 0, pc, length);
162 case IQ2000_OPERAND_OFFSET :
163 print_address (cd, info, fields->f_offset, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
165 case IQ2000_OPERAND_RD :
166 print_keyword (cd, info, & iq2000_cgen_opval_gr_names, fields->f_rd, 0);
168 case IQ2000_OPERAND_RD_RS :
169 print_keyword (cd, info, & iq2000_cgen_opval_gr_names, fields->f_rd_rs, 0|(1<<CGEN_OPERAND_VIRTUAL));
171 case IQ2000_OPERAND_RD_RT :
172 print_keyword (cd, info, & iq2000_cgen_opval_gr_names, fields->f_rd_rt, 0|(1<<CGEN_OPERAND_VIRTUAL));
174 case IQ2000_OPERAND_RS :
175 print_keyword (cd, info, & iq2000_cgen_opval_gr_names, fields->f_rs, 0);
177 case IQ2000_OPERAND_RT :
178 print_keyword (cd, info, & iq2000_cgen_opval_gr_names, fields->f_rt, 0);
180 case IQ2000_OPERAND_RT_RS :
181 print_keyword (cd, info, & iq2000_cgen_opval_gr_names, fields->f_rt_rs, 0|(1<<CGEN_OPERAND_VIRTUAL));
183 case IQ2000_OPERAND_SHAMT :
184 print_normal (cd, info, fields->f_shamt, 0, pc, length);
188 /* xgettext:c-format */
189 fprintf (stderr, _("Unrecognized field %d while printing insn.\n"),
195 cgen_print_fn * const iq2000_cgen_print_handlers[] =
202 iq2000_cgen_init_dis (CGEN_CPU_DESC cd)
204 iq2000_cgen_init_opcode_table (cd);
205 iq2000_cgen_init_ibld_table (cd);
206 cd->print_handlers = & iq2000_cgen_print_handlers[0];
207 cd->print_operand = iq2000_cgen_print_operand;
211 /* Default print handler. */
214 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
218 bfd_vma pc ATTRIBUTE_UNUSED,
219 int length ATTRIBUTE_UNUSED)
221 disassemble_info *info = (disassemble_info *) dis_info;
223 #ifdef CGEN_PRINT_NORMAL
224 CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
227 /* Print the operand as directed by the attributes. */
228 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
229 ; /* nothing to do */
230 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
231 (*info->fprintf_func) (info->stream, "%ld", value);
233 (*info->fprintf_func) (info->stream, "0x%lx", value);
236 /* Default address handler. */
239 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
243 bfd_vma pc ATTRIBUTE_UNUSED,
244 int length ATTRIBUTE_UNUSED)
246 disassemble_info *info = (disassemble_info *) dis_info;
248 #ifdef CGEN_PRINT_ADDRESS
249 CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
252 /* Print the operand as directed by the attributes. */
253 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
254 ; /* Nothing to do. */
255 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
256 (*info->print_address_func) (value, info);
257 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
258 (*info->print_address_func) (value, info);
259 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
260 (*info->fprintf_func) (info->stream, "%ld", (long) value);
262 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
265 /* Keyword print handler. */
268 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
270 CGEN_KEYWORD *keyword_table,
272 unsigned int attrs ATTRIBUTE_UNUSED)
274 disassemble_info *info = (disassemble_info *) dis_info;
275 const CGEN_KEYWORD_ENTRY *ke;
277 ke = cgen_keyword_lookup_value (keyword_table, value);
279 (*info->fprintf_func) (info->stream, "%s", ke->name);
281 (*info->fprintf_func) (info->stream, "???");
284 /* Default insn printer.
286 DIS_INFO is defined as `void *' so the disassembler needn't know anything
287 about disassemble_info. */
290 print_insn_normal (CGEN_CPU_DESC cd,
292 const CGEN_INSN *insn,
297 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
298 disassemble_info *info = (disassemble_info *) dis_info;
299 const CGEN_SYNTAX_CHAR_TYPE *syn;
301 CGEN_INIT_PRINT (cd);
303 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
305 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
307 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
310 if (CGEN_SYNTAX_CHAR_P (*syn))
312 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
316 /* We have an operand. */
317 iq2000_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
318 fields, CGEN_INSN_ATTRS (insn), pc, length);
322 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
324 Returns 0 if all is well, non-zero otherwise. */
327 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
329 disassemble_info *info,
332 CGEN_EXTRACT_INFO *ex_info,
333 unsigned long *insn_value)
335 int status = (*info->read_memory_func) (pc, buf, buflen, info);
339 (*info->memory_error_func) (status, pc, info);
343 ex_info->dis_info = info;
344 ex_info->valid = (1 << buflen) - 1;
345 ex_info->insn_bytes = buf;
347 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
351 /* Utility to print an insn.
352 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
353 The result is the size of the insn in bytes or zero for an unknown insn
354 or -1 if an error occurs fetching data (memory_error_func will have
358 print_insn (CGEN_CPU_DESC cd,
360 disassemble_info *info,
364 CGEN_INSN_INT insn_value;
365 const CGEN_INSN_LIST *insn_list;
366 CGEN_EXTRACT_INFO ex_info;
369 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
370 basesize = cd->base_insn_bitsize < buflen * 8 ?
371 cd->base_insn_bitsize : buflen * 8;
372 insn_value = cgen_get_insn_value (cd, buf, basesize);
375 /* Fill in ex_info fields like read_insn would. Don't actually call
376 read_insn, since the incoming buffer is already read (and possibly
377 modified a la m32r). */
378 ex_info.valid = (1 << buflen) - 1;
379 ex_info.dis_info = info;
380 ex_info.insn_bytes = buf;
382 /* The instructions are stored in hash lists.
383 Pick the first one and keep trying until we find the right one. */
385 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
386 while (insn_list != NULL)
388 const CGEN_INSN *insn = insn_list->insn;
391 unsigned long insn_value_cropped;
393 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
394 /* Not needed as insn shouldn't be in hash lists if not supported. */
395 /* Supported by this cpu? */
396 if (! iq2000_cgen_insn_supported (cd, insn))
398 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
403 /* Basic bit mask must be correct. */
404 /* ??? May wish to allow target to defer this check until the extract
407 /* Base size may exceed this instruction's size. Extract the
408 relevant part from the buffer. */
409 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
410 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
411 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
412 info->endian == BFD_ENDIAN_BIG);
414 insn_value_cropped = insn_value;
416 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
417 == CGEN_INSN_BASE_VALUE (insn))
419 /* Printing is handled in two passes. The first pass parses the
420 machine insn and extracts the fields. The second pass prints
423 /* Make sure the entire insn is loaded into insn_value, if it
425 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
426 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
428 unsigned long full_insn_value;
429 int rc = read_insn (cd, pc, info, buf,
430 CGEN_INSN_BITSIZE (insn) / 8,
431 & ex_info, & full_insn_value);
434 length = CGEN_EXTRACT_FN (cd, insn)
435 (cd, insn, &ex_info, full_insn_value, &fields, pc);
438 length = CGEN_EXTRACT_FN (cd, insn)
439 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
441 /* Length < 0 -> error. */
446 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
447 /* Length is in bits, result is in bytes. */
452 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
458 /* Default value for CGEN_PRINT_INSN.
459 The result is the size of the insn in bytes or zero for an unknown insn
460 or -1 if an error occured fetching bytes. */
462 #ifndef CGEN_PRINT_INSN
463 #define CGEN_PRINT_INSN default_print_insn
467 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
469 bfd_byte buf[CGEN_MAX_INSN_SIZE];
473 /* Attempt to read the base part of the insn. */
474 buflen = cd->base_insn_bitsize / 8;
475 status = (*info->read_memory_func) (pc, buf, buflen, info);
477 /* Try again with the minimum part, if min < base. */
478 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
480 buflen = cd->min_insn_bitsize / 8;
481 status = (*info->read_memory_func) (pc, buf, buflen, info);
486 (*info->memory_error_func) (status, pc, info);
490 return print_insn (cd, pc, info, buf, buflen);
494 Print one instruction from PC on INFO->STREAM.
495 Return the size of the instruction (in bytes). */
497 typedef struct cpu_desc_list
499 struct cpu_desc_list *next;
507 print_insn_iq2000 (bfd_vma pc, disassemble_info *info)
509 static cpu_desc_list *cd_list = 0;
510 cpu_desc_list *cl = 0;
511 static CGEN_CPU_DESC cd = 0;
512 static CGEN_BITSET *prev_isa;
513 static int prev_mach;
514 static int prev_endian;
518 int endian = (info->endian == BFD_ENDIAN_BIG
520 : CGEN_ENDIAN_LITTLE);
521 enum bfd_architecture arch;
523 /* ??? gdb will set mach but leave the architecture as "unknown" */
524 #ifndef CGEN_BFD_ARCH
525 #define CGEN_BFD_ARCH bfd_arch_iq2000
528 if (arch == bfd_arch_unknown)
529 arch = CGEN_BFD_ARCH;
531 /* There's no standard way to compute the machine or isa number
532 so we leave it to the target. */
533 #ifdef CGEN_COMPUTE_MACH
534 mach = CGEN_COMPUTE_MACH (info);
539 #ifdef CGEN_COMPUTE_ISA
541 static CGEN_BITSET *permanent_isa;
544 permanent_isa = cgen_bitset_create (MAX_ISAS);
546 cgen_bitset_clear (isa);
547 cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
550 isa = info->insn_sets;
553 /* If we've switched cpu's, try to find a handle we've used before */
555 && (cgen_bitset_compare (isa, prev_isa) != 0
557 || endian != prev_endian))
560 for (cl = cd_list; cl; cl = cl->next)
562 if (cgen_bitset_compare (cl->isa, isa) == 0 &&
564 cl->endian == endian)
573 /* If we haven't initialized yet, initialize the opcode table. */
576 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
577 const char *mach_name;
581 mach_name = arch_type->printable_name;
583 prev_isa = cgen_bitset_copy (isa);
585 prev_endian = endian;
586 cd = iq2000_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
587 CGEN_CPU_OPEN_BFDMACH, mach_name,
588 CGEN_CPU_OPEN_ENDIAN, prev_endian,
593 /* Save this away for future reference. */
594 cl = xmalloc (sizeof (struct cpu_desc_list));
602 iq2000_cgen_init_dis (cd);
605 /* We try to have as much common code as possible.
606 But at this point some targets need to take over. */
607 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
608 but if not possible try to move this hook elsewhere rather than
610 length = CGEN_PRINT_INSN (cd, pc, info);
616 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
617 return cd->default_insn_bitsize / 8;