1 /* ppc-dis.c -- Disassemble PowerPC instructions
2 Copyright 1994, 1995, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support
5 This file is part of GDB, GAS, and the GNU binutils.
7 GDB, GAS, and the GNU binutils are free software; you can redistribute
8 them and/or modify them under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either version
10 2, or (at your option) any later version.
12 GDB, GAS, and the GNU binutils are distributed in the hope that they
13 will be useful, but WITHOUT ANY WARRANTY; without even the implied
14 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 the GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this file; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 #include "opcode/ppc.h"
26 /* This file provides several disassembler functions, all of which use
27 the disassembler interface defined in dis-asm.h. Several functions
28 are provided because this file handles disassembly for the PowerPC
29 in both big and little endian mode and also for the POWER (RS/6000)
32 static int print_insn_powerpc PARAMS ((bfd_vma, struct disassemble_info *,
33 int bigendian, int dialect));
35 static int powerpc_dialect PARAMS ((struct disassemble_info *));
37 /* Determine which set of machines to disassemble for. PPC403/601 or
38 BookE. For convenience, also disassemble instructions supported
39 by the AltiVec vector unit. */
43 struct disassemble_info *info;
45 int dialect = PPC_OPCODE_PPC | PPC_OPCODE_ALTIVEC;
47 if (BFD_DEFAULT_TARGET_SIZE == 64)
48 dialect |= PPC_OPCODE_64;
50 if (info->disassembler_options
51 && (strcmp (info->disassembler_options, "booke") == 0
52 || strcmp (info->disassembler_options, "booke32") == 0
53 || strcmp (info->disassembler_options, "booke64") == 0))
54 dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_BOOKE64;
56 if ((info->mach == bfd_mach_ppc_e500)
57 || (info->disassembler_options
58 && ( strcmp (info->disassembler_options, "e500") == 0
59 || strcmp (info->disassembler_options, "e500x2") == 0)))
61 dialect |= PPC_OPCODE_BOOKE
62 | PPC_OPCODE_SPE | PPC_OPCODE_ISEL
63 | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
64 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK
66 /* efs* and AltiVec conflict. */
67 dialect &= ~PPC_OPCODE_ALTIVEC;
70 if (info->disassembler_options
71 && (strcmp (info->disassembler_options, "efs") == 0))
73 dialect |= PPC_OPCODE_EFS;
74 /* efs* and AltiVec conflict. */
75 dialect &= ~PPC_OPCODE_ALTIVEC;
78 dialect |= PPC_OPCODE_403 | PPC_OPCODE_601 | PPC_OPCODE_COMMON;
80 if (info->disassembler_options
81 && strcmp (info->disassembler_options, "power4") == 0)
82 dialect |= PPC_OPCODE_POWER4;
84 if (info->disassembler_options)
86 if (strstr (info->disassembler_options, "32") != NULL)
87 dialect &= ~PPC_OPCODE_64;
88 else if (strstr (info->disassembler_options, "64") != NULL)
89 dialect |= PPC_OPCODE_64;
95 /* Print a big endian PowerPC instruction. */
98 print_insn_big_powerpc (memaddr, info)
100 struct disassemble_info *info;
102 return print_insn_powerpc (memaddr, info, 1, powerpc_dialect(info));
105 /* Print a little endian PowerPC instruction. */
108 print_insn_little_powerpc (memaddr, info)
110 struct disassemble_info *info;
112 return print_insn_powerpc (memaddr, info, 0, powerpc_dialect(info));
115 /* Print a POWER (RS/6000) instruction. */
118 print_insn_rs6000 (memaddr, info)
120 struct disassemble_info *info;
122 return print_insn_powerpc (memaddr, info, 1, PPC_OPCODE_POWER);
125 /* Print a PowerPC or POWER instruction. */
128 print_insn_powerpc (memaddr, info, bigendian, dialect)
130 struct disassemble_info *info;
137 const struct powerpc_opcode *opcode;
138 const struct powerpc_opcode *opcode_end;
141 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
144 (*info->memory_error_func) (status, memaddr, info);
149 insn = bfd_getb32 (buffer);
151 insn = bfd_getl32 (buffer);
153 /* Get the major opcode of the instruction. */
156 /* Find the first match in the opcode table. We could speed this up
157 a bit by doing a binary search on the major opcode. */
158 opcode_end = powerpc_opcodes + powerpc_num_opcodes;
159 for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++)
161 unsigned long table_op;
162 const unsigned char *opindex;
163 const struct powerpc_operand *operand;
168 table_op = PPC_OP (opcode->opcode);
174 if ((insn & opcode->mask) != opcode->opcode
175 || (opcode->flags & dialect) == 0)
178 if ((dialect & PPC_OPCODE_EFS) && (opcode->flags & PPC_OPCODE_ALTIVEC))
181 /* Make two passes over the operands. First see if any of them
182 have extraction functions, and, if they do, make sure the
183 instruction is valid. */
185 for (opindex = opcode->operands; *opindex != 0; opindex++)
187 operand = powerpc_operands + *opindex;
188 if (operand->extract)
189 (*operand->extract) (insn, dialect, &invalid);
194 /* The instruction is valid. */
195 (*info->fprintf_func) (info->stream, "%s", opcode->name);
196 if (opcode->operands[0] != 0)
197 (*info->fprintf_func) (info->stream, "\t");
199 /* Now extract and print the operands. */
202 for (opindex = opcode->operands; *opindex != 0; opindex++)
206 operand = powerpc_operands + *opindex;
208 /* Operands that are marked FAKE are simply ignored. We
209 already made sure that the extract function considered
210 the instruction to be valid. */
211 if ((operand->flags & PPC_OPERAND_FAKE) != 0)
214 /* Extract the value from the instruction. */
215 if (operand->extract)
216 value = (*operand->extract) (insn, dialect, (int *) NULL);
219 value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
220 if ((operand->flags & PPC_OPERAND_SIGNED) != 0
221 && (value & (1 << (operand->bits - 1))) != 0)
222 value -= 1 << operand->bits;
225 /* If the operand is optional, and the value is zero, don't
227 if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0
228 && (operand->flags & PPC_OPERAND_NEXT) == 0
234 (*info->fprintf_func) (info->stream, ",");
238 /* Print the operand as directed by the flags. */
239 if ((operand->flags & PPC_OPERAND_GPR) != 0)
240 (*info->fprintf_func) (info->stream, "r%ld", value);
241 else if ((operand->flags & PPC_OPERAND_FPR) != 0)
242 (*info->fprintf_func) (info->stream, "f%ld", value);
243 else if ((operand->flags & PPC_OPERAND_VR) != 0)
244 (*info->fprintf_func) (info->stream, "v%ld", value);
245 else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0)
246 (*info->print_address_func) (memaddr + value, info);
247 else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0)
248 (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info);
249 else if ((operand->flags & PPC_OPERAND_CR) == 0
250 || (dialect & PPC_OPCODE_PPC) == 0)
251 (*info->fprintf_func) (info->stream, "%ld", value);
254 if (operand->bits == 3)
255 (*info->fprintf_func) (info->stream, "cr%d", value);
258 static const char *cbnames[4] = { "lt", "gt", "eq", "so" };
264 (*info->fprintf_func) (info->stream, "4*cr%d", cr);
269 (*info->fprintf_func) (info->stream, "+");
270 (*info->fprintf_func) (info->stream, "%s", cbnames[cc]);
277 (*info->fprintf_func) (info->stream, ")");
281 if ((operand->flags & PPC_OPERAND_PARENS) == 0)
285 (*info->fprintf_func) (info->stream, "(");
290 /* We have found and printed an instruction; return. */
294 /* We could not find a match. */
295 (*info->fprintf_func) (info->stream, ".long 0x%lx", insn);