old-cross-binutils/opcodes/mips-dis.c

/* Print mips instructions for GDB, the GNU debugger, or for objdump.
   Copyright 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2012
   Free Software Foundation, Inc.
   Contributed by Nobuyuki Hikichi(hikichi@sra.co.jp).

   This file is part of the GNU opcodes library.

   This library is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   It is distributed in the hope that it will be useful, but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
   License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include "sysdep.h"
#include "dis-asm.h"
#include "libiberty.h"
#include "opcode/mips.h"
#include "opintl.h"

/* FIXME: These are needed to figure out if the code is mips16 or
   not. The low bit of the address is often a good indicator.  No
   symbol table is available when this code runs out in an embedded
   system as when it is used for disassembler support in a monitor.  */

#if !defined(EMBEDDED_ENV)
#define SYMTAB_AVAILABLE 1
#include "elf-bfd.h"
#include "elf/mips.h"
#endif

/* Mips instructions are at maximum this many bytes long.  */
#define INSNLEN 4


/* FIXME: These should be shared with gdb somehow.  */

struct mips_cp0sel_name
{
  unsigned int cp0reg;
  unsigned int sel;
  const char * const name;
};

/* The mips16 registers.  */
static const unsigned int mips16_to_32_reg_map[] =
{
  16, 17, 2, 3, 4, 5, 6, 7
};

/* The microMIPS registers with type b.  */
#define micromips_to_32_reg_b_map	mips16_to_32_reg_map

/* The microMIPS registers with type c.  */
#define micromips_to_32_reg_c_map	mips16_to_32_reg_map

/* The microMIPS registers with type d.  */
#define micromips_to_32_reg_d_map	mips16_to_32_reg_map

/* The microMIPS registers with type e.  */
#define micromips_to_32_reg_e_map	mips16_to_32_reg_map

/* The microMIPS registers with type f.  */
#define micromips_to_32_reg_f_map	mips16_to_32_reg_map

/* The microMIPS registers with type g.  */
#define micromips_to_32_reg_g_map	mips16_to_32_reg_map

/* The microMIPS registers with type h.  */
static const unsigned int micromips_to_32_reg_h_map1[] =
{
  5, 5, 6, 4, 4, 4, 4, 4
};
static const unsigned int micromips_to_32_reg_h_map2[] =
{
  6, 7, 7, 21, 22, 5, 6, 7
};

/* The microMIPS registers with type j: 32 registers.  */

/* The microMIPS registers with type l.  */
#define micromips_to_32_reg_l_map	mips16_to_32_reg_map

/* The microMIPS registers with type m.  */
static const unsigned int micromips_to_32_reg_m_map[] =
{
  0, 17, 2, 3, 16, 18, 19, 20
};

/* The microMIPS registers with type n.  */
#define micromips_to_32_reg_n_map      micromips_to_32_reg_m_map

/* The microMIPS registers with type p: 32 registers.  */

/* The microMIPS registers with type q.  */
static const unsigned int micromips_to_32_reg_q_map[] =
{
  0, 17, 2, 3, 4, 5, 6, 7
};

/* reg type s is $29.  */

/* reg type t is the same as the last register.  */

/* reg type y is $31.  */

/* reg type z is $0.  */

/* micromips imm B type.  */
static const int micromips_imm_b_map[8] =
{
  1, 4, 8, 12, 16, 20, 24, -1
};

/* micromips imm C type.  */
static const int micromips_imm_c_map[16] =
{
  128, 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64, 255, 32768, 65535
};

/* micromips imm D type: (-512..511)<<1.  */
/* micromips imm E type: (-64..63)<<1.  */
/* micromips imm F type: (0..63).  */
/* micromips imm G type: (-1..14).  */
/* micromips imm H type: (0..15)<<1.  */
/* micromips imm I type: (-1..126).  */
/* micromips imm J type: (0..15)<<2.  */
/* micromips imm L type: (0..15).  */
/* micromips imm M type: (1..8).  */
/* micromips imm W type: (0..63)<<2.  */
/* micromips imm X type: (-8..7).  */
/* micromips imm Y type: (-258..-3, 2..257)<<2.  */

#define mips16_reg_names(rn)	mips_gpr_names[mips16_to_32_reg_map[rn]]


static const char * const mips_gpr_names_numeric[32] =
{
  "$0",   "$1",   "$2",   "$3",   "$4",   "$5",   "$6",   "$7",
  "$8",   "$9",   "$10",  "$11",  "$12",  "$13",  "$14",  "$15",
  "$16",  "$17",  "$18",  "$19",  "$20",  "$21",  "$22",  "$23",
  "$24",  "$25",  "$26",  "$27",  "$28",  "$29",  "$30",  "$31"
};

static const char * const mips_gpr_names_oldabi[32] =
{
  "zero", "at",   "v0",   "v1",   "a0",   "a1",   "a2",   "a3",
  "t0",   "t1",   "t2",   "t3",   "t4",   "t5",   "t6",   "t7",
  "s0",   "s1",   "s2",   "s3",   "s4",   "s5",   "s6",   "s7",
  "t8",   "t9",   "k0",   "k1",   "gp",   "sp",   "s8",   "ra"
};

static const char * const mips_gpr_names_newabi[32] =
{
  "zero", "at",   "v0",   "v1",   "a0",   "a1",   "a2",   "a3",
  "a4",   "a5",   "a6",   "a7",   "t0",   "t1",   "t2",   "t3",
  "s0",   "s1",   "s2",   "s3",   "s4",   "s5",   "s6",   "s7",
  "t8",   "t9",   "k0",   "k1",   "gp",   "sp",   "s8",   "ra"
};

static const char * const mips_fpr_names_numeric[32] =
{
  "$f0",  "$f1",  "$f2",  "$f3",  "$f4",  "$f5",  "$f6",  "$f7",
  "$f8",  "$f9",  "$f10", "$f11", "$f12", "$f13", "$f14", "$f15",
  "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",
  "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31"
};

static const char * const mips_fpr_names_32[32] =
{
  "fv0",  "fv0f", "fv1",  "fv1f", "ft0",  "ft0f", "ft1",  "ft1f",
  "ft2",  "ft2f", "ft3",  "ft3f", "fa0",  "fa0f", "fa1",  "fa1f",
  "ft4",  "ft4f", "ft5",  "ft5f", "fs0",  "fs0f", "fs1",  "fs1f",
  "fs2",  "fs2f", "fs3",  "fs3f", "fs4",  "fs4f", "fs5",  "fs5f"
};

static const char * const mips_fpr_names_n32[32] =
{
  "fv0",  "ft14", "fv1",  "ft15", "ft0",  "ft1",  "ft2",  "ft3",
  "ft4",  "ft5",  "ft6",  "ft7",  "fa0",  "fa1",  "fa2",  "fa3",
  "fa4",  "fa5",  "fa6",  "fa7",  "fs0",  "ft8",  "fs1",  "ft9",
  "fs2",  "ft10", "fs3",  "ft11", "fs4",  "ft12", "fs5",  "ft13"
};

static const char * const mips_fpr_names_64[32] =
{
  "fv0",  "ft12", "fv1",  "ft13", "ft0",  "ft1",  "ft2",  "ft3",
  "ft4",  "ft5",  "ft6",  "ft7",  "fa0",  "fa1",  "fa2",  "fa3",
  "fa4",  "fa5",  "fa6",  "fa7",  "ft8",  "ft9",  "ft10", "ft11",
  "fs0",  "fs1",  "fs2",  "fs3",  "fs4",  "fs5",  "fs6",  "fs7"
};

static const char * const mips_cp0_names_numeric[32] =
{
  "$0",   "$1",   "$2",   "$3",   "$4",   "$5",   "$6",   "$7",
  "$8",   "$9",   "$10",  "$11",  "$12",  "$13",  "$14",  "$15",
  "$16",  "$17",  "$18",  "$19",  "$20",  "$21",  "$22",  "$23",
  "$24",  "$25",  "$26",  "$27",  "$28",  "$29",  "$30",  "$31"
};

static const char * const mips_cp0_names_r3000[32] =
{
  "c0_index",     "c0_random",    "c0_entrylo",   "$3",
  "c0_context",   "$5",           "$6",           "$7",
  "c0_badvaddr",  "$9",           "c0_entryhi",   "$11",
  "c0_sr",        "c0_cause",     "c0_epc",       "c0_prid",
  "$16",          "$17",          "$18",          "$19",
  "$20",          "$21",          "$22",          "$23",
  "$24",          "$25",          "$26",          "$27",
  "$28",          "$29",          "$30",          "$31",
};

static const char * const mips_cp0_names_r4000[32] =
{
  "c0_index",     "c0_random",    "c0_entrylo0",  "c0_entrylo1",
  "c0_context",   "c0_pagemask",  "c0_wired",     "$7",
  "c0_badvaddr",  "c0_count",     "c0_entryhi",   "c0_compare",
  "c0_sr",        "c0_cause",     "c0_epc",       "c0_prid",
  "c0_config",    "c0_lladdr",    "c0_watchlo",   "c0_watchhi",
  "c0_xcontext",  "$21",          "$22",          "$23",
  "$24",          "$25",          "c0_ecc",       "c0_cacheerr",
  "c0_taglo",     "c0_taghi",     "c0_errorepc",  "$31",
};

static const char * const mips_cp0_names_r5900[32] =
{
  "c0_index",     "c0_random",    "c0_entrylo0",  "c0_entrylo1",
  "c0_context",   "c0_pagemask",  "c0_wired",     "$7",
  "c0_badvaddr",  "c0_count",     "c0_entryhi",   "c0_compare",
  "c0_sr",        "c0_cause",     "c0_epc",       "c0_prid",
  "c0_config",    "$17",          "$18",          "$19",
  "$20",          "$21",          "$22",          "c0_badpaddr",
  "c0_depc",      "c0_perfcnt",   "$26",          "$27",
  "c0_taglo",     "c0_taghi",     "c0_errorepc",  "$31"
};

static const struct mips_cp0sel_name mips_cp0sel_names_mipsr5900[] =
{
  { 24, 2, "c0_iab"			},
  { 24, 3, "c0_iabm"		},
  { 24, 4, "c0_dab"			},
  { 24, 5, "c0_dabm"		},
  { 24, 6, "c0_dvb"			},
  { 24, 7, "c0_dvbm"		},
  { 25, 1, "c0_perfcnt,1"	},
  { 25, 2, "c0_perfcnt,2"	}
};

static const char * const mips_cp0_names_mips3264[32] =
{
  "c0_index",     "c0_random",    "c0_entrylo0",  "c0_entrylo1",
  "c0_context",   "c0_pagemask",  "c0_wired",     "$7",
  "c0_badvaddr",  "c0_count",     "c0_entryhi",   "c0_compare",
  "c0_status",    "c0_cause",     "c0_epc",       "c0_prid",
  "c0_config",    "c0_lladdr",    "c0_watchlo",   "c0_watchhi",
  "c0_xcontext",  "$21",          "$22",          "c0_debug",
  "c0_depc",      "c0_perfcnt",   "c0_errctl",    "c0_cacheerr",
  "c0_taglo",     "c0_taghi",     "c0_errorepc",  "c0_desave",
};

static const struct mips_cp0sel_name mips_cp0sel_names_mips3264[] =
{
  { 16, 1, "c0_config1"		},
  { 16, 2, "c0_config2"		},
  { 16, 3, "c0_config3"		},
  { 18, 1, "c0_watchlo,1"	},
  { 18, 2, "c0_watchlo,2"	},
  { 18, 3, "c0_watchlo,3"	},
  { 18, 4, "c0_watchlo,4"	},
  { 18, 5, "c0_watchlo,5"	},
  { 18, 6, "c0_watchlo,6"	},
  { 18, 7, "c0_watchlo,7"	},
  { 19, 1, "c0_watchhi,1"	},
  { 19, 2, "c0_watchhi,2"	},
  { 19, 3, "c0_watchhi,3"	},
  { 19, 4, "c0_watchhi,4"	},
  { 19, 5, "c0_watchhi,5"	},
  { 19, 6, "c0_watchhi,6"	},
  { 19, 7, "c0_watchhi,7"	},
  { 25, 1, "c0_perfcnt,1"	},
  { 25, 2, "c0_perfcnt,2"	},
  { 25, 3, "c0_perfcnt,3"	},
  { 25, 4, "c0_perfcnt,4"	},
  { 25, 5, "c0_perfcnt,5"	},
  { 25, 6, "c0_perfcnt,6"	},
  { 25, 7, "c0_perfcnt,7"	},
  { 27, 1, "c0_cacheerr,1"	},
  { 27, 2, "c0_cacheerr,2"	},
  { 27, 3, "c0_cacheerr,3"	},
  { 28, 1, "c0_datalo"		},
  { 29, 1, "c0_datahi"		}
};

static const char * const mips_cp0_names_mips3264r2[32] =
{
  "c0_index",     "c0_random",    "c0_entrylo0",  "c0_entrylo1",
  "c0_context",   "c0_pagemask",  "c0_wired",     "c0_hwrena",
  "c0_badvaddr",  "c0_count",     "c0_entryhi",   "c0_compare",
  "c0_status",    "c0_cause",     "c0_epc",       "c0_prid",
  "c0_config",    "c0_lladdr",    "c0_watchlo",   "c0_watchhi",
  "c0_xcontext",  "$21",          "$22",          "c0_debug",
  "c0_depc",      "c0_perfcnt",   "c0_errctl",    "c0_cacheerr",
  "c0_taglo",     "c0_taghi",     "c0_errorepc",  "c0_desave",
};

static const struct mips_cp0sel_name mips_cp0sel_names_mips3264r2[] =
{
  {  4, 1, "c0_contextconfig"	},
  {  0, 1, "c0_mvpcontrol"	},
  {  0, 2, "c0_mvpconf0"	},
  {  0, 3, "c0_mvpconf1"	},
  {  1, 1, "c0_vpecontrol"	},
  {  1, 2, "c0_vpeconf0"	},
  {  1, 3, "c0_vpeconf1"	},
  {  1, 4, "c0_yqmask"		},
  {  1, 5, "c0_vpeschedule"	},
  {  1, 6, "c0_vpeschefback"	},
  {  2, 1, "c0_tcstatus"	},
  {  2, 2, "c0_tcbind"		},
  {  2, 3, "c0_tcrestart"	},
  {  2, 4, "c0_tchalt"		},
  {  2, 5, "c0_tccontext"	},
  {  2, 6, "c0_tcschedule"	},
  {  2, 7, "c0_tcschefback"	},
  {  5, 1, "c0_pagegrain"	},
  {  6, 1, "c0_srsconf0"	},
  {  6, 2, "c0_srsconf1"	},
  {  6, 3, "c0_srsconf2"	},
  {  6, 4, "c0_srsconf3"	},
  {  6, 5, "c0_srsconf4"	},
  { 12, 1, "c0_intctl"		},
  { 12, 2, "c0_srsctl"		},
  { 12, 3, "c0_srsmap"		},
  { 15, 1, "c0_ebase"		},
  { 16, 1, "c0_config1"		},
  { 16, 2, "c0_config2"		},
  { 16, 3, "c0_config3"		},
  { 18, 1, "c0_watchlo,1"	},
  { 18, 2, "c0_watchlo,2"	},
  { 18, 3, "c0_watchlo,3"	},
  { 18, 4, "c0_watchlo,4"	},
  { 18, 5, "c0_watchlo,5"	},
  { 18, 6, "c0_watchlo,6"	},
  { 18, 7, "c0_watchlo,7"	},
  { 19, 1, "c0_watchhi,1"	},
  { 19, 2, "c0_watchhi,2"	},
  { 19, 3, "c0_watchhi,3"	},
  { 19, 4, "c0_watchhi,4"	},
  { 19, 5, "c0_watchhi,5"	},
  { 19, 6, "c0_watchhi,6"	},
  { 19, 7, "c0_watchhi,7"	},
  { 23, 1, "c0_tracecontrol"	},
  { 23, 2, "c0_tracecontrol2"	},
  { 23, 3, "c0_usertracedata"	},
  { 23, 4, "c0_tracebpc"	},
  { 25, 1, "c0_perfcnt,1"	},
  { 25, 2, "c0_perfcnt,2"	},
  { 25, 3, "c0_perfcnt,3"	},
  { 25, 4, "c0_perfcnt,4"	},
  { 25, 5, "c0_perfcnt,5"	},
  { 25, 6, "c0_perfcnt,6"	},
  { 25, 7, "c0_perfcnt,7"	},
  { 27, 1, "c0_cacheerr,1"	},
  { 27, 2, "c0_cacheerr,2"	},
  { 27, 3, "c0_cacheerr,3"	},
  { 28, 1, "c0_datalo"		},
  { 28, 2, "c0_taglo1"		},
  { 28, 3, "c0_datalo1"		},
  { 28, 4, "c0_taglo2"		},
  { 28, 5, "c0_datalo2"		},
  { 28, 6, "c0_taglo3"		},
  { 28, 7, "c0_datalo3"		},
  { 29, 1, "c0_datahi"		},
  { 29, 2, "c0_taghi1"		},
  { 29, 3, "c0_datahi1"		},
  { 29, 4, "c0_taghi2"		},
  { 29, 5, "c0_datahi2"		},
  { 29, 6, "c0_taghi3"		},
  { 29, 7, "c0_datahi3"		},
};

/* SB-1: MIPS64 (mips_cp0_names_mips3264) with minor mods.  */
static const char * const mips_cp0_names_sb1[32] =
{
  "c0_index",     "c0_random",    "c0_entrylo0",  "c0_entrylo1",
  "c0_context",   "c0_pagemask",  "c0_wired",     "$7",
  "c0_badvaddr",  "c0_count",     "c0_entryhi",   "c0_compare",
  "c0_status",    "c0_cause",     "c0_epc",       "c0_prid",
  "c0_config",    "c0_lladdr",    "c0_watchlo",   "c0_watchhi",
  "c0_xcontext",  "$21",          "$22",          "c0_debug",
  "c0_depc",      "c0_perfcnt",   "c0_errctl",    "c0_cacheerr_i",
  "c0_taglo_i",   "c0_taghi_i",   "c0_errorepc",  "c0_desave",
};

static const struct mips_cp0sel_name mips_cp0sel_names_sb1[] =
{
  { 16, 1, "c0_config1"		},
  { 18, 1, "c0_watchlo,1"	},
  { 19, 1, "c0_watchhi,1"	},
  { 22, 0, "c0_perftrace"	},
  { 23, 3, "c0_edebug"		},
  { 25, 1, "c0_perfcnt,1"	},
  { 25, 2, "c0_perfcnt,2"	},
  { 25, 3, "c0_perfcnt,3"	},
  { 25, 4, "c0_perfcnt,4"	},
  { 25, 5, "c0_perfcnt,5"	},
  { 25, 6, "c0_perfcnt,6"	},
  { 25, 7, "c0_perfcnt,7"	},
  { 26, 1, "c0_buserr_pa"	},
  { 27, 1, "c0_cacheerr_d"	},
  { 27, 3, "c0_cacheerr_d_pa"	},
  { 28, 1, "c0_datalo_i"	},
  { 28, 2, "c0_taglo_d"		},
  { 28, 3, "c0_datalo_d"	},
  { 29, 1, "c0_datahi_i"	},
  { 29, 2, "c0_taghi_d"		},
  { 29, 3, "c0_datahi_d"	},
};

/* Xlr cop0 register names.  */
static const char * const mips_cp0_names_xlr[32] = {
  "c0_index",     "c0_random",    "c0_entrylo0",  "c0_entrylo1",
  "c0_context",   "c0_pagemask",  "c0_wired",     "$7",
  "c0_badvaddr",  "c0_count",     "c0_entryhi",   "c0_compare",
  "c0_status",    "c0_cause",     "c0_epc",       "c0_prid",
  "c0_config",    "c0_lladdr",    "c0_watchlo",   "c0_watchhi",
  "c0_xcontext",  "$21",          "$22",          "c0_debug",
  "c0_depc",      "c0_perfcnt",   "c0_errctl",    "c0_cacheerr_i",
  "c0_taglo_i",   "c0_taghi_i",   "c0_errorepc",  "c0_desave",
};

/* XLR's CP0 Select Registers.  */

static const struct mips_cp0sel_name mips_cp0sel_names_xlr[] = {
  {  9, 6, "c0_extintreq"       },
  {  9, 7, "c0_extintmask"      },
  { 15, 1, "c0_ebase"           },
  { 16, 1, "c0_config1"         },
  { 16, 2, "c0_config2"         },
  { 16, 3, "c0_config3"         },
  { 16, 7, "c0_procid2"         },
  { 18, 1, "c0_watchlo,1"       },
  { 18, 2, "c0_watchlo,2"       },
  { 18, 3, "c0_watchlo,3"       },
  { 18, 4, "c0_watchlo,4"       },
  { 18, 5, "c0_watchlo,5"       },
  { 18, 6, "c0_watchlo,6"       },
  { 18, 7, "c0_watchlo,7"       },
  { 19, 1, "c0_watchhi,1"       },
  { 19, 2, "c0_watchhi,2"       },
  { 19, 3, "c0_watchhi,3"       },
  { 19, 4, "c0_watchhi,4"       },
  { 19, 5, "c0_watchhi,5"       },
  { 19, 6, "c0_watchhi,6"       },
  { 19, 7, "c0_watchhi,7"       },
  { 25, 1, "c0_perfcnt,1"       },
  { 25, 2, "c0_perfcnt,2"       },
  { 25, 3, "c0_perfcnt,3"       },
  { 25, 4, "c0_perfcnt,4"       },
  { 25, 5, "c0_perfcnt,5"       },
  { 25, 6, "c0_perfcnt,6"       },
  { 25, 7, "c0_perfcnt,7"       },
  { 27, 1, "c0_cacheerr,1"      },
  { 27, 2, "c0_cacheerr,2"      },
  { 27, 3, "c0_cacheerr,3"      },
  { 28, 1, "c0_datalo"          },
  { 29, 1, "c0_datahi"          }
};

static const char * const mips_hwr_names_numeric[32] =
{
  "$0",   "$1",   "$2",   "$3",   "$4",   "$5",   "$6",   "$7",
  "$8",   "$9",   "$10",  "$11",  "$12",  "$13",  "$14",  "$15",
  "$16",  "$17",  "$18",  "$19",  "$20",  "$21",  "$22",  "$23",
  "$24",  "$25",  "$26",  "$27",  "$28",  "$29",  "$30",  "$31"
};

static const char * const mips_hwr_names_mips3264r2[32] =
{
  "hwr_cpunum",   "hwr_synci_step", "hwr_cc",     "hwr_ccres",
  "$4",          "$5",            "$6",           "$7",
  "$8",   "$9",   "$10",  "$11",  "$12",  "$13",  "$14",  "$15",
  "$16",  "$17",  "$18",  "$19",  "$20",  "$21",  "$22",  "$23",
  "$24",  "$25",  "$26",  "$27",  "$28",  "$29",  "$30",  "$31"
};

struct mips_abi_choice
{
  const char * name;
  const char * const *gpr_names;
  const char * const *fpr_names;
};

struct mips_abi_choice mips_abi_choices[] =
{
  { "numeric", mips_gpr_names_numeric, mips_fpr_names_numeric },
  { "32", mips_gpr_names_oldabi, mips_fpr_names_32 },
  { "n32", mips_gpr_names_newabi, mips_fpr_names_n32 },
  { "64", mips_gpr_names_newabi, mips_fpr_names_64 },
};

struct mips_arch_choice
{
  const char *name;
  int bfd_mach_valid;
  unsigned long bfd_mach;
  int processor;
  int isa;
  int ase;
  const char * const *cp0_names;
  const struct mips_cp0sel_name *cp0sel_names;
  unsigned int cp0sel_names_len;
  const char * const *hwr_names;
};

const struct mips_arch_choice mips_arch_choices[] =
{
  { "numeric",	0, 0, 0, 0, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },

  { "r3000",	1, bfd_mach_mips3000, CPU_R3000, ISA_MIPS1, 0,
    mips_cp0_names_r3000, NULL, 0, mips_hwr_names_numeric },
  { "r3900",	1, bfd_mach_mips3900, CPU_R3900, ISA_MIPS1, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r4000",	1, bfd_mach_mips4000, CPU_R4000, ISA_MIPS3, 0,
    mips_cp0_names_r4000, NULL, 0, mips_hwr_names_numeric },
  { "r4010",	1, bfd_mach_mips4010, CPU_R4010, ISA_MIPS2, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "vr4100",	1, bfd_mach_mips4100, CPU_VR4100, ISA_MIPS3, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "vr4111",	1, bfd_mach_mips4111, CPU_R4111, ISA_MIPS3, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "vr4120",	1, bfd_mach_mips4120, CPU_VR4120, ISA_MIPS3, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r4300",	1, bfd_mach_mips4300, CPU_R4300, ISA_MIPS3, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r4400",	1, bfd_mach_mips4400, CPU_R4400, ISA_MIPS3, 0,
    mips_cp0_names_r4000, NULL, 0, mips_hwr_names_numeric },
  { "r4600",	1, bfd_mach_mips4600, CPU_R4600, ISA_MIPS3, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r4650",	1, bfd_mach_mips4650, CPU_R4650, ISA_MIPS3, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r5000",	1, bfd_mach_mips5000, CPU_R5000, ISA_MIPS4, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "vr5400",	1, bfd_mach_mips5400, CPU_VR5400, ISA_MIPS4, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "vr5500",	1, bfd_mach_mips5500, CPU_VR5500, ISA_MIPS4, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r5900",	1, bfd_mach_mips5900, CPU_R5900, ISA_MIPS3, 0,
    mips_cp0_names_r5900, NULL, 0, mips_hwr_names_numeric },
  { "r6000",	1, bfd_mach_mips6000, CPU_R6000, ISA_MIPS2, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "rm7000",	1, bfd_mach_mips7000, CPU_RM7000, ISA_MIPS4, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "rm9000",	1, bfd_mach_mips7000, CPU_RM7000, ISA_MIPS4, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r8000",	1, bfd_mach_mips8000, CPU_R8000, ISA_MIPS4, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r10000",	1, bfd_mach_mips10000, CPU_R10000, ISA_MIPS4, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r12000",	1, bfd_mach_mips12000, CPU_R12000, ISA_MIPS4, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r14000",	1, bfd_mach_mips14000, CPU_R14000, ISA_MIPS4, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "r16000",	1, bfd_mach_mips16000, CPU_R16000, ISA_MIPS4, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
  { "mips5",	1, bfd_mach_mips5, CPU_MIPS5, ISA_MIPS5, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },

  /* For stock MIPS32, disassemble all applicable MIPS-specified ASEs.
     Note that MIPS-3D and MDMX are not applicable to MIPS32.  (See
     _MIPS32 Architecture For Programmers Volume I: Introduction to the
     MIPS32 Architecture_ (MIPS Document Number MD00082, Revision 0.95),
     page 1.  */
  { "mips32",	1, bfd_mach_mipsisa32, CPU_MIPS32,
    ISA_MIPS32,  ASE_SMARTMIPS,
    mips_cp0_names_mips3264,
    mips_cp0sel_names_mips3264, ARRAY_SIZE (mips_cp0sel_names_mips3264),
    mips_hwr_names_numeric },

  { "mips32r2",	1, bfd_mach_mipsisa32r2, CPU_MIPS32R2,
    ISA_MIPS32R2,
    (ASE_SMARTMIPS | ASE_DSP | ASE_DSPR2 | ASE_EVA | ASE_MIPS3D
     | ASE_MT | ASE_MCU | ASE_VIRT),
    mips_cp0_names_mips3264r2,
    mips_cp0sel_names_mips3264r2, ARRAY_SIZE (mips_cp0sel_names_mips3264r2),
    mips_hwr_names_mips3264r2 },

  /* For stock MIPS64, disassemble all applicable MIPS-specified ASEs.  */
  { "mips64",	1, bfd_mach_mipsisa64, CPU_MIPS64,
    ISA_MIPS64,  ASE_MIPS3D | ASE_MDMX,
    mips_cp0_names_mips3264,
    mips_cp0sel_names_mips3264, ARRAY_SIZE (mips_cp0sel_names_mips3264),
    mips_hwr_names_numeric },

  { "mips64r2",	1, bfd_mach_mipsisa64r2, CPU_MIPS64R2,
    ISA_MIPS64R2,
    (ASE_MIPS3D | ASE_DSP | ASE_DSPR2 | ASE_DSP64 | ASE_EVA | ASE_MT
     | ASE_MDMX | ASE_MCU | ASE_VIRT | ASE_VIRT64),
    mips_cp0_names_mips3264r2,
    mips_cp0sel_names_mips3264r2, ARRAY_SIZE (mips_cp0sel_names_mips3264r2),
    mips_hwr_names_mips3264r2 },

  { "sb1",	1, bfd_mach_mips_sb1, CPU_SB1,
    ISA_MIPS64 | INSN_SB1,  ASE_MIPS3D,
    mips_cp0_names_sb1,
    mips_cp0sel_names_sb1, ARRAY_SIZE (mips_cp0sel_names_sb1),
    mips_hwr_names_numeric },

  { "loongson2e",   1, bfd_mach_mips_loongson_2e, CPU_LOONGSON_2E,
    ISA_MIPS3 | INSN_LOONGSON_2E, 0, mips_cp0_names_numeric,
    NULL, 0, mips_hwr_names_numeric },

  { "loongson2f",   1, bfd_mach_mips_loongson_2f, CPU_LOONGSON_2F,
    ISA_MIPS3 | INSN_LOONGSON_2F, 0, mips_cp0_names_numeric,
    NULL, 0, mips_hwr_names_numeric },

  { "loongson3a",   1, bfd_mach_mips_loongson_3a, CPU_LOONGSON_3A,
    ISA_MIPS64 | INSN_LOONGSON_3A, 0, mips_cp0_names_numeric,
    NULL, 0, mips_hwr_names_numeric },

  { "octeon",   1, bfd_mach_mips_octeon, CPU_OCTEON,
    ISA_MIPS64R2 | INSN_OCTEON, 0, mips_cp0_names_numeric, NULL, 0,
    mips_hwr_names_numeric },

  { "octeon+",   1, bfd_mach_mips_octeonp, CPU_OCTEONP,
    ISA_MIPS64R2 | INSN_OCTEONP, 0, mips_cp0_names_numeric,
    NULL, 0, mips_hwr_names_numeric },

  { "octeon2",   1, bfd_mach_mips_octeon2, CPU_OCTEON2,
    ISA_MIPS64R2 | INSN_OCTEON2, 0, mips_cp0_names_numeric,
    NULL, 0, mips_hwr_names_numeric },

  { "xlr", 1, bfd_mach_mips_xlr, CPU_XLR,
    ISA_MIPS64 | INSN_XLR, 0,
    mips_cp0_names_xlr,
    mips_cp0sel_names_xlr, ARRAY_SIZE (mips_cp0sel_names_xlr),
    mips_hwr_names_numeric },

  /* XLP is mostly like XLR, with the prominent exception it is being
     MIPS64R2.  */
  { "xlp", 1, bfd_mach_mips_xlr, CPU_XLR,
    ISA_MIPS64R2 | INSN_XLR, 0,
    mips_cp0_names_xlr,
    mips_cp0sel_names_xlr, ARRAY_SIZE (mips_cp0sel_names_xlr),
    mips_hwr_names_numeric },

  /* This entry, mips16, is here only for ISA/processor selection; do
     not print its name.  */
  { "",		1, bfd_mach_mips16, CPU_MIPS16, ISA_MIPS3, 0,
    mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
};

/* ISA and processor type to disassemble for, and register names to use.
   set_default_mips_dis_options and parse_mips_dis_options fill in these
   values.  */
static int mips_processor;
static int mips_isa;
static int mips_ase;
static int micromips_ase;
static const char * const *mips_gpr_names;
static const char * const *mips_fpr_names;
static const char * const *mips_cp0_names;
static const struct mips_cp0sel_name *mips_cp0sel_names;
static int mips_cp0sel_names_len;
static const char * const *mips_hwr_names;

/* Other options */
static int no_aliases;	/* If set disassemble as most general inst.  */

static const struct mips_abi_choice *
choose_abi_by_name (const char *name, unsigned int namelen)
{
  const struct mips_abi_choice *c;
  unsigned int i;

  for (i = 0, c = NULL; i < ARRAY_SIZE (mips_abi_choices) && c == NULL; i++)
    if (strncmp (mips_abi_choices[i].name, name, namelen) == 0
	&& strlen (mips_abi_choices[i].name) == namelen)
      c = &mips_abi_choices[i];

  return c;
}

static const struct mips_arch_choice *
choose_arch_by_name (const char *name, unsigned int namelen)
{
  const struct mips_arch_choice *c = NULL;
  unsigned int i;

  for (i = 0, c = NULL; i < ARRAY_SIZE (mips_arch_choices) && c == NULL; i++)
    if (strncmp (mips_arch_choices[i].name, name, namelen) == 0
	&& strlen (mips_arch_choices[i].name) == namelen)
      c = &mips_arch_choices[i];

  return c;
}

static const struct mips_arch_choice *
choose_arch_by_number (unsigned long mach)
{
  static unsigned long hint_bfd_mach;
  static const struct mips_arch_choice *hint_arch_choice;
  const struct mips_arch_choice *c;
  unsigned int i;

  /* We optimize this because even if the user specifies no
     flags, this will be done for every instruction!  */
  if (hint_bfd_mach == mach
      && hint_arch_choice != NULL
      && hint_arch_choice->bfd_mach == hint_bfd_mach)
    return hint_arch_choice;

  for (i = 0, c = NULL; i < ARRAY_SIZE (mips_arch_choices) && c == NULL; i++)
    {
      if (mips_arch_choices[i].bfd_mach_valid
	  && mips_arch_choices[i].bfd_mach == mach)
	{
	  c = &mips_arch_choices[i];
	  hint_bfd_mach = mach;
	  hint_arch_choice = c;
	}
    }
  return c;
}

/* Check if the object uses NewABI conventions.  */

static int
is_newabi (Elf_Internal_Ehdr *header)
{
  /* There are no old-style ABIs which use 64-bit ELF.  */
  if (header->e_ident[EI_CLASS] == ELFCLASS64)
    return 1;

  /* If a 32-bit ELF file, n32 is a new-style ABI.  */
  if ((header->e_flags & EF_MIPS_ABI2) != 0)
    return 1;

  return 0;
}

/* Check if the object has microMIPS ASE code.  */

static int
is_micromips (Elf_Internal_Ehdr *header)
{
  if ((header->e_flags & EF_MIPS_ARCH_ASE_MICROMIPS) != 0)
    return 1;

  return 0;
}

static void
set_default_mips_dis_options (struct disassemble_info *info)
{
  const struct mips_arch_choice *chosen_arch;

  /* Defaults: mipsIII/r3000 (?!), no microMIPS ASE (any compressed code
     is MIPS16 ASE) (o)32-style ("oldabi") GPR names, and numeric FPR,
     CP0 register, and HWR names.  */
  mips_isa = ISA_MIPS3;
  mips_processor = CPU_R3000;
  micromips_ase = 0;
  mips_ase = 0;
  mips_gpr_names = mips_gpr_names_oldabi;
  mips_fpr_names = mips_fpr_names_numeric;
  mips_cp0_names = mips_cp0_names_numeric;
  mips_cp0sel_names = NULL;
  mips_cp0sel_names_len = 0;
  mips_hwr_names = mips_hwr_names_numeric;
  no_aliases = 0;

  /* Update settings according to the ELF file header flags.  */
  if (info->flavour == bfd_target_elf_flavour && info->section != NULL)
    {
      Elf_Internal_Ehdr *header;

      header = elf_elfheader (info->section->owner);
      /* If an ELF "newabi" binary, use the n32/(n)64 GPR names.  */
      if (is_newabi (header))
	mips_gpr_names = mips_gpr_names_newabi;
      /* If a microMIPS binary, then don't use MIPS16 bindings.  */
      micromips_ase = is_micromips (header);
    }

  /* Set ISA, architecture, and cp0 register names as best we can.  */
#if ! SYMTAB_AVAILABLE
  /* This is running out on a target machine, not in a host tool.
     FIXME: Where does mips_target_info come from?  */
  target_processor = mips_target_info.processor;
  mips_isa = mips_target_info.isa;
  mips_ase = mips_target_info.ase;
#else
  chosen_arch = choose_arch_by_number (info->mach);
  if (chosen_arch != NULL)
    {
      mips_processor = chosen_arch->processor;
      mips_isa = chosen_arch->isa;
      mips_ase = chosen_arch->ase;
      mips_cp0_names = chosen_arch->cp0_names;
      mips_cp0sel_names = chosen_arch->cp0sel_names;
      mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
      mips_hwr_names = chosen_arch->hwr_names;
    }
#endif
}

static void
parse_mips_dis_option (const char *option, unsigned int len)
{
  unsigned int i, optionlen, vallen;
  const char *val;
  const struct mips_abi_choice *chosen_abi;
  const struct mips_arch_choice *chosen_arch;

  /* Try to match options that are simple flags */
  if (CONST_STRNEQ (option, "no-aliases"))
    {
      no_aliases = 1;
      return;
    }

  if (CONST_STRNEQ (option, "virt"))
    {
      mips_ase |= ASE_VIRT;
      if (mips_isa & ISA_MIPS64R2)
	mips_ase |= ASE_VIRT64;
      return;
    }
  
  /* Look for the = that delimits the end of the option name.  */
  for (i = 0; i < len; i++)
    if (option[i] == '=')
      break;

  if (i == 0)		/* Invalid option: no name before '='.  */
    return;
  if (i == len)		/* Invalid option: no '='.  */
    return;
  if (i == (len - 1))	/* Invalid option: no value after '='.  */
    return;

  optionlen = i;
  val = option + (optionlen + 1);
  vallen = len - (optionlen + 1);

  if (strncmp ("gpr-names", option, optionlen) == 0
      && strlen ("gpr-names") == optionlen)
    {
      chosen_abi = choose_abi_by_name (val, vallen);
      if (chosen_abi != NULL)
	mips_gpr_names = chosen_abi->gpr_names;
      return;
    }

  if (strncmp ("fpr-names", option, optionlen) == 0
      && strlen ("fpr-names") == optionlen)
    {
      chosen_abi = choose_abi_by_name (val, vallen);
      if (chosen_abi != NULL)
	mips_fpr_names = chosen_abi->fpr_names;
      return;
    }

  if (strncmp ("cp0-names", option, optionlen) == 0
      && strlen ("cp0-names") == optionlen)
    {
      chosen_arch = choose_arch_by_name (val, vallen);
      if (chosen_arch != NULL)
	{
	  mips_cp0_names = chosen_arch->cp0_names;
	  mips_cp0sel_names = chosen_arch->cp0sel_names;
	  mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
	}
      return;
    }

  if (strncmp ("hwr-names", option, optionlen) == 0
      && strlen ("hwr-names") == optionlen)
    {
      chosen_arch = choose_arch_by_name (val, vallen);
      if (chosen_arch != NULL)
	mips_hwr_names = chosen_arch->hwr_names;
      return;
    }

  if (strncmp ("reg-names", option, optionlen) == 0
      && strlen ("reg-names") == optionlen)
    {
      /* We check both ABI and ARCH here unconditionally, so
	 that "numeric" will do the desirable thing: select
	 numeric register names for all registers.  Other than
	 that, a given name probably won't match both.  */
      chosen_abi = choose_abi_by_name (val, vallen);
      if (chosen_abi != NULL)
	{
	  mips_gpr_names = chosen_abi->gpr_names;
	  mips_fpr_names = chosen_abi->fpr_names;
	}
      chosen_arch = choose_arch_by_name (val, vallen);
      if (chosen_arch != NULL)
	{
	  mips_cp0_names = chosen_arch->cp0_names;
	  mips_cp0sel_names = chosen_arch->cp0sel_names;
	  mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
	  mips_hwr_names = chosen_arch->hwr_names;
	}
      return;
    }

  /* Invalid option.  */
}

static void
parse_mips_dis_options (const char *options)
{
  const char *option_end;

  if (options == NULL)
    return;

  while (*options != '\0')
    {
      /* Skip empty options.  */
      if (*options == ',')
	{
	  options++;
	  continue;
	}

      /* We know that *options is neither NUL or a comma.  */
      option_end = options + 1;
      while (*option_end != ',' && *option_end != '\0')
	option_end++;

      parse_mips_dis_option (options, option_end - options);

      /* Go on to the next one.  If option_end points to a comma, it
	 will be skipped above.  */
      options = option_end;
    }
}

static const struct mips_cp0sel_name *
lookup_mips_cp0sel_name (const struct mips_cp0sel_name *names,
			 unsigned int len,
			 unsigned int cp0reg,
			 unsigned int sel)
{
  unsigned int i;

  for (i = 0; i < len; i++)
    if (names[i].cp0reg == cp0reg && names[i].sel == sel)
      return &names[i];
  return NULL;
}

/* Print insn arguments for 32/64-bit code.  */

static void
print_insn_args (const char *d,
		 int l,
		 bfd_vma pc,
		 struct disassemble_info *info,
		 const struct mips_opcode *opp)
{
  const fprintf_ftype infprintf = info->fprintf_func;
  unsigned int lsb, msb, msbd, cpreg;
  void *is = info->stream;

  lsb = 0;

#define GET_OP(insn, field) \
  (((insn) >> OP_SH_##field) & OP_MASK_##field)
#define GET_OP_S(insn, field) \
  ((GET_OP (insn, field) ^ ((OP_MASK_##field >> 1) + 1)) \
   - ((OP_MASK_##field >> 1) + 1))
  for (; *d != '\0'; d++)
    {
      switch (*d)
	{
	case ',':
	case '(':
	case ')':
	case '[':
	case ']':
	  infprintf (is, "%c", *d);
	  break;

	case '+':
	  /* Extension character; switch for second char.  */
	  d++;
	  switch (*d)
	    {
	    case '\0':
	      /* xgettext:c-format */
	      infprintf (is,
			 _("# internal error, "
			   "incomplete extension sequence (+)"));
	      return;

	    case 'A':
	      lsb = GET_OP (l, SHAMT);
	      infprintf (is, "0x%x", lsb);
	      break;
	
	    case 'B':
	      msb = GET_OP (l, INSMSB);
	      infprintf (is, "0x%x", msb - lsb + 1);
	      break;

	    case '1':
	      infprintf (is, "0x%x", GET_OP (l, UDI1));
	      break;
	      
	    case '2':
	      infprintf (is, "0x%x", GET_OP (l, UDI2));
	      break;
	      
	    case '3':
	      infprintf (is, "0x%x", GET_OP (l, UDI3));
	      break;
      
	    case '4':
	      infprintf (is, "0x%x", GET_OP (l, UDI4));
	      break;
	      
	    case 'C':
	    case 'H':
	      msbd = GET_OP (l, EXTMSBD);
	      infprintf (is, "0x%x", msbd + 1);
	      break;

	    case 'E':
	      lsb = GET_OP (l, SHAMT) + 32;
	      infprintf (is, "0x%x", lsb);
	      break;
	
	    case 'F':
	      msb = GET_OP (l, INSMSB) + 32;
	      infprintf (is, "0x%x", msb - lsb + 1);
	      break;

	    case 'G':
	      msbd = GET_OP (l, EXTMSBD) + 32;
	      infprintf (is, "0x%x", msbd + 1);
	      break;

	    case 'J':		/* hypcall operand */
	      infprintf (is, "0x%x", GET_OP (l, CODE10));
	      break;

	    case 't': /* Coprocessor 0 reg name */
	      infprintf (is, "%s", mips_cp0_names[GET_OP (l, RT)]);
	      break;

	    case 'x':		/* bbit bit index */
	      infprintf (is, "0x%x", GET_OP (l, BBITIND));
	      break;

	    case 'p':		/* cins, cins32, exts and exts32 position */
	      infprintf (is, "0x%x", GET_OP (l, CINSPOS));
	      break;

	    case 's':		/* cins and exts length-minus-one */
	      infprintf (is, "0x%x", GET_OP (l, CINSLM1));
	      break;

	    case 'S':		/* cins32 and exts32 length-minus-one field */
	      infprintf (is, "0x%x", GET_OP (l, CINSLM1));
	      break;

	    case 'Q':		/* seqi/snei immediate field */
	      infprintf (is, "%d", GET_OP_S (l, SEQI));
	      break;

	    case 'a':		/* 8-bit signed offset in bit 6 */
	      infprintf (is, "%d", GET_OP_S (l, OFFSET_A));
	      break;

	    case 'b':		/* 8-bit signed offset in bit 3 */
	      infprintf (is, "%d", GET_OP_S (l, OFFSET_B));
	      break;

	    case 'c':		/* 9-bit signed offset in bit 6 */
	      /* Left shift 4 bits to print the real offset.  */
	      infprintf (is, "%d", GET_OP_S (l, OFFSET_C) << 4);
	      break;

	    case 'z':
	      infprintf (is, "%s", mips_gpr_names[GET_OP (l, RZ)]);
	      break;

	    case 'Z':
	      infprintf (is, "%s", mips_fpr_names[GET_OP (l, FZ)]);
	      break;

	    case 'j':	/* 9-bit signed offset in bit 7.  */
	      infprintf (is, "%d", GET_OP_S (l, EVAOFFSET));
	      break;

	    default:
	      /* xgettext:c-format */
	      infprintf (is,
			 _("# internal error, "
			   "undefined extension sequence (+%c)"),
			 *d);
	      return;
	    }
	  break;

	case '2':
	  infprintf (is, "0x%x", GET_OP (l, BP));
	  break;

	case '3':
	  infprintf (is, "0x%x", GET_OP (l, SA3));
	  break;

	case '4':
	  infprintf (is, "0x%x", GET_OP (l, SA4));
	  break;

	case '5':
	  infprintf (is, "0x%x", GET_OP (l, IMM8));
	  break;

	case '6':
	  infprintf (is, "0x%x", GET_OP (l, RS));
	  break;

	case '7':
	  infprintf (is, "$ac%d", GET_OP (l, DSPACC));
	  break;

	case '8':
	  infprintf (is, "0x%x", GET_OP (l, WRDSP));
	  break;

	case '9':
	  infprintf (is, "$ac%d", GET_OP (l, DSPACC_S));
	  break;

	case '0': /* dsp 6-bit signed immediate in bit 20 */
	  infprintf (is, "%d", GET_OP_S (l, DSPSFT));
	  break;

	case ':': /* dsp 7-bit signed immediate in bit 19 */
	  infprintf (is, "%d", GET_OP_S (l, DSPSFT_7));
	  break;

	case '~':
	  infprintf (is, "%d", GET_OP_S (l, OFFSET12));
	  break;

	case '\\':
	  infprintf (is, "0x%x", GET_OP (l, 3BITPOS));
	  break;

	case '\'':
	  infprintf (is, "0x%x", GET_OP (l, RDDSP));
	  break;

	case '@': /* dsp 10-bit signed immediate in bit 16 */
	  infprintf (is, "%d", GET_OP_S (l, IMM10));
	  break;

	case '!':
	  infprintf (is, "%d", GET_OP (l, MT_U));
	  break;

	case '$':
	  infprintf (is, "%d", GET_OP (l, MT_H));
	  break;

	case '*':
	  infprintf (is, "$ac%d", GET_OP (l, MTACC_T));
	  break;

	case '&':
	  infprintf (is, "$ac%d", GET_OP (l, MTACC_D));
	  break;

	case 'g':
	  /* Coprocessor register for CTTC1, MTTC2, MTHC2, CTTC2.  */
	  infprintf (is, "$%d", GET_OP (l, RD));
	  break;

	case 's':
	case 'b':
	case 'r':
	case 'v':
	  infprintf (is, "%s", mips_gpr_names[GET_OP (l, RS)]);
	  break;

	case 't':
	case 'w':
	  infprintf (is, "%s", mips_gpr_names[GET_OP (l, RT)]);
	  break;

	case 'i':
	case 'u':
	  infprintf (is, "0x%x", GET_OP (l, IMMEDIATE));
	  break;

	case 'j': /* Same as i, but sign-extended.  */
	case 'o':
	  infprintf (is, "%d", GET_OP_S (l, DELTA));
	  break;

	case 'h':
	  infprintf (is, "0x%x", GET_OP (l, PREFX));
	  break;

	case 'k':
	  infprintf (is, "0x%x", GET_OP (l, CACHE));
	  break;

	case 'a':
	  info->target = (((pc + 4) & ~(bfd_vma) 0x0fffffff)
			  | (GET_OP (l, TARGET) << 2));
	  /* For gdb disassembler, force odd address on jalx.  */
	  if (info->flavour == bfd_target_unknown_flavour
	      && strcmp (opp->name, "jalx") == 0)
	    info->target |= 1;
	  (*info->print_address_func) (info->target, info);
	  break;

	case 'p':
	  /* Sign extend the displacement.  */
	  info->target = (GET_OP_S (l, DELTA) << 2) + pc + INSNLEN;
	  (*info->print_address_func) (info->target, info);
	  break;

	case 'd':
	  infprintf (is, "%s", mips_gpr_names[GET_OP (l, RD)]);
	  break;

	case 'U':
	  {
	    /* First check for both rd and rt being equal.  */
	    unsigned int reg;

	    reg = GET_OP (l, RD);
	    if (reg == GET_OP (l, RT))
	      infprintf (is, "%s", mips_gpr_names[reg]);
	    else
	      {
		/* If one is zero use the other.  */
		if (reg == 0)
		  infprintf (is, "%s", mips_gpr_names[GET_OP (l, RT)]);
		else if (GET_OP (l, RT) == 0)
		  infprintf (is, "%s", mips_gpr_names[reg]);
		else /* Bogus, result depends on processor.  */
		  infprintf (is, "%s or %s",
			     mips_gpr_names[reg],
			     mips_gpr_names[GET_OP (l, RT)]);
	      }
	  }
	  break;

	case 'z':
	  infprintf (is, "%s", mips_gpr_names[0]);
	  break;

	case '<':
	case '1':
	  infprintf (is, "0x%x", GET_OP (l, SHAMT));
	  break;

	case 'c':
	  infprintf (is, "0x%x", GET_OP (l, CODE));
	  break;

	case 'q':
	  infprintf (is, "0x%x", GET_OP (l, CODE2));
	  break;

	case 'C':
	  infprintf (is, "0x%x", GET_OP (l, COPZ));
	  break;

	case 'B':
	  infprintf (is, "0x%x", GET_OP (l, CODE20));
	  break;

	case 'J':
	  infprintf (is, "0x%x", GET_OP (l, CODE19));
	  break;

	case 'S':
	case 'V':
	  infprintf (is, "%s", mips_fpr_names[GET_OP (l, FS)]);
	  break;

	case 'T':
	case 'W':
	  infprintf (is, "%s", mips_fpr_names[GET_OP (l, FT)]);
	  break;

	case 'D':
	  infprintf (is, "%s", mips_fpr_names[GET_OP (l, FD)]);
	  break;

	case 'R':
	  infprintf (is, "%s", mips_fpr_names[GET_OP (l, FR)]);
	  break;

	case 'E':
	  cpreg = GET_OP (l, RT);
	  goto copro;

	case 'G':
	  cpreg = GET_OP (l, RD);
	copro:
	  /* Coprocessor register for mtcN instructions, et al.  Note
	     that FPU (cp1) instructions disassemble this field using
	     'S' format.  Therefore, we only need to worry about cp0,
	     cp2, and cp3.  */
	  if (opp->name[strlen (opp->name) - 1] == '0')
	    {
	      if (d[1] == ',' && d[2] == 'H')
		{
		  const struct mips_cp0sel_name *n;
		  unsigned int sel;

		  sel = GET_OP (l, SEL);

		  /* CP0 register including 'sel' code for mtcN (et al.), to be
		     printed textually if known.  If not known, print both
		     CP0 register name and sel numerically since CP0 register
		     with sel 0 may have a name unrelated to register being
		     printed.  */
		  n = lookup_mips_cp0sel_name (mips_cp0sel_names,
					       mips_cp0sel_names_len,
					       cpreg, sel);
		  if (n != NULL)
		    infprintf (is, "%s", n->name);
		  else
		    infprintf (is, "$%d,%d", cpreg, sel);
		  d += 2;
		}
	      else
		infprintf (is, "%s", mips_cp0_names[cpreg]);
	    }
	  else
	    infprintf (is, "$%d", cpreg);
	  break;

	case 'K':
	  infprintf (is, "%s", mips_hwr_names[GET_OP (l, RD)]);
	  break;

	case 'N':
	  infprintf (is,
		     (opp->pinfo & (FP_D | FP_S)) != 0 ? "$fcc%d" : "$cc%d",
		     GET_OP (l, BCC));
	  break;

	case 'M':
	  infprintf (is, "$fcc%d", GET_OP (l, CCC));
	  break;

	case 'P':
	  infprintf (is, "%d", GET_OP (l, PERFREG));
	  break;

	case 'e':
	  infprintf (is, "%d", GET_OP (l, VECBYTE));
	  break;

	case '%':
	  infprintf (is, "%d", GET_OP (l, VECALIGN));
	  break;

	case 'H':
	  infprintf (is, "%d", GET_OP (l, SEL));
	  break;

	case 'O':
	  infprintf (is, "%d", GET_OP (l, ALN));
	  break;

	case 'Q':
	  {
	    unsigned int vsel = GET_OP (l, VSEL);

	    if ((vsel & 0x10) == 0)
	      {
		int fmt;

		vsel &= 0x0f;
		for (fmt = 0; fmt < 3; fmt++, vsel >>= 1)
		  if ((vsel & 1) == 0)
		    break;
		infprintf (is, "$v%d[%d]", GET_OP (l, FT), vsel >> 1);
	      }
	    else if ((vsel & 0x08) == 0)
	      {
		infprintf (is, "$v%d", GET_OP (l, FT));
	      }
	    else
	      {
		infprintf (is, "0x%x", GET_OP (l, FT));
	      }
	  }
	  break;

	case 'X':
	  infprintf (is, "$v%d", GET_OP (l, FD));
	  break;

	case 'Y':
	  infprintf (is, "$v%d", GET_OP (l, FS));
	  break;

	case 'Z':
	  infprintf (is, "$v%d", GET_OP (l, FT));
	  break;

	default:
	  /* xgettext:c-format */
	  infprintf (is, _("# internal error, undefined modifier (%c)"), *d);
	  return;
	}
    }
}

/* Print the mips instruction at address MEMADDR in debugged memory,
   on using INFO.  Returns length of the instruction, in bytes, which is
   always INSNLEN.  BIGENDIAN must be 1 if this is big-endian code, 0 if
   this is little-endian code.  */

static int
print_insn_mips (bfd_vma memaddr,
		 int word,
		 struct disassemble_info *info)
{
  static const struct mips_opcode *mips_hash[OP_MASK_OP + 1];
  const fprintf_ftype infprintf = info->fprintf_func;
  const struct mips_opcode *op;
  static bfd_boolean init = 0;
  void *is = info->stream;

  /* Build a hash table to shorten the search time.  */
  if (! init)
    {
      unsigned int i;

      for (i = 0; i <= OP_MASK_OP; i++)
	{
	  for (op = mips_opcodes; op < &mips_opcodes[NUMOPCODES]; op++)
	    {
	      if (op->pinfo == INSN_MACRO
		  || (no_aliases && (op->pinfo2 & INSN2_ALIAS)))
		continue;
	      if (i == GET_OP (op->match, OP))
		{
		  mips_hash[i] = op;
		  break;
		}
	    }
	}

      init = 1;
    }

  info->bytes_per_chunk = INSNLEN;
  info->display_endian = info->endian;
  info->insn_info_valid = 1;
  info->branch_delay_insns = 0;
  info->data_size = 0;
  info->insn_type = dis_nonbranch;
  info->target = 0;
  info->target2 = 0;

  op = mips_hash[GET_OP (word, OP)];
  if (op != NULL)
    {
      for (; op < &mips_opcodes[NUMOPCODES]; op++)
	{
	  if (op->pinfo != INSN_MACRO 
	      && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
	      && (word & op->mask) == op->match)
	    {
	      const char *d;

	      /* We always allow to disassemble the jalx instruction.  */
	      if (!opcode_is_member (op, mips_isa, mips_ase, mips_processor)
		  && strcmp (op->name, "jalx"))
		continue;

	      /* Figure out instruction type and branch delay information.  */
	      if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
	        {
		  if ((op->pinfo & (INSN_WRITE_GPR_31
				    | INSN_WRITE_GPR_D)) != 0)
		    info->insn_type = dis_jsr;
		  else
		    info->insn_type = dis_branch;
		  info->branch_delay_insns = 1;
		}
	      else if ((op->pinfo & (INSN_COND_BRANCH_DELAY
				     | INSN_COND_BRANCH_LIKELY)) != 0)
		{
		  if ((op->pinfo & INSN_WRITE_GPR_31) != 0)
		    info->insn_type = dis_condjsr;
		  else
		    info->insn_type = dis_condbranch;
		  info->branch_delay_insns = 1;
		}
	      else if ((op->pinfo & (INSN_STORE_MEMORY
				     | INSN_LOAD_MEMORY_DELAY)) != 0)
		info->insn_type = dis_dref;

	      infprintf (is, "%s", op->name);

	      d = op->args;
	      if (d != NULL && *d != '\0')
		{
		  infprintf (is, "\t");
		  print_insn_args (d, word, memaddr, info, op);
		}

	      return INSNLEN;
	    }
	}
    }
#undef GET_OP_S
#undef GET_OP

  /* Handle undefined instructions.  */
  info->insn_type = dis_noninsn;
  infprintf (is, "0x%x", word);
  return INSNLEN;
}

/* Disassemble an operand for a mips16 instruction.  */

static void
print_mips16_insn_arg (char type,
		       const struct mips_opcode *op,
		       int l,
		       bfd_boolean use_extend,
		       int extend,
		       bfd_vma memaddr,
		       struct disassemble_info *info)
{
  const fprintf_ftype infprintf = info->fprintf_func;
  void *is = info->stream;

#define GET_OP(insn, field) \
  (((insn) >> MIPS16OP_SH_##field) & MIPS16OP_MASK_##field)
#define GET_OP_S(insn, field) \
  ((GET_OP (insn, field) ^ ((MIPS16OP_MASK_##field >> 1) + 1)) \
   - ((MIPS16OP_MASK_##field >> 1) + 1))
  switch (type)
    {
    case ',':
    case '(':
    case ')':
      infprintf (is, "%c", type);
      break;

    case 'y':
    case 'w':
      infprintf (is, "%s", mips16_reg_names (GET_OP (l, RY)));
      break;

    case 'x':
    case 'v':
      infprintf (is, "%s", mips16_reg_names (GET_OP (l, RX)));
      break;

    case 'z':
      infprintf (is, "%s", mips16_reg_names (GET_OP (l, RZ)));
      break;

    case 'Z':
      infprintf (is, "%s", mips16_reg_names (GET_OP (l, MOVE32Z)));
      break;

    case '0':
      infprintf (is, "%s", mips_gpr_names[0]);
      break;

    case 'S':
      infprintf (is, "%s", mips_gpr_names[29]);
      break;

    case 'P':
      infprintf (is, "$pc");
      break;

    case 'R':
      infprintf (is, "%s", mips_gpr_names[31]);
      break;

    case 'X':
      infprintf (is, "%s", mips_gpr_names[GET_OP (l, REGR32)]);
      break;

    case 'Y':
      infprintf (is, "%s", mips_gpr_names[MIPS16OP_EXTRACT_REG32R (l)]);
      break;

    case '<':
    case '>':
    case '[':
    case ']':
    case '4':
    case '5':
    case 'H':
    case 'W':
    case 'D':
    case 'j':
    case '6':
    case '8':
    case 'V':
    case 'C':
    case 'U':
    case 'k':
    case 'K':
    case 'p':
    case 'q':
    case 'A':
    case 'B':
    case 'E':
      {
	int immed, nbits, shift, signedp, extbits, pcrel, extu, branch;

	shift = 0;
	signedp = 0;
	extbits = 16;
	pcrel = 0;
	extu = 0;
	branch = 0;
	switch (type)
	  {
	  case '<':
	    nbits = 3;
	    immed = GET_OP (l, RZ);
	    extbits = 5;
	    extu = 1;
	    break;
	  case '>':
	    nbits = 3;
	    immed = GET_OP (l, RX);
	    extbits = 5;
	    extu = 1;
	    break;
	  case '[':
	    nbits = 3;
	    immed = GET_OP (l, RZ);
	    extbits = 6;
	    extu = 1;
	    break;
	  case ']':
	    nbits = 3;
	    immed = GET_OP (l, RX);
	    extbits = 6;
	    extu = 1;
	    break;
	  case '4':
	    nbits = 4;
	    immed = GET_OP (l, IMM4);
	    signedp = 1;
	    extbits = 15;
	    break;
	  case '5':
	    nbits = 5;
	    immed = GET_OP (l, IMM5);
	    info->insn_type = dis_dref;
	    info->data_size = 1;
	    break;
	  case 'H':
	    nbits = 5;
	    shift = 1;
	    immed = GET_OP (l, IMM5);
	    info->insn_type = dis_dref;
	    info->data_size = 2;
	    break;
	  case 'W':
	    nbits = 5;
	    shift = 2;
	    immed = GET_OP (l, IMM5);
	    if ((op->pinfo & MIPS16_INSN_READ_PC) == 0
		&& (op->pinfo & MIPS16_INSN_READ_SP) == 0)
	      {
		info->insn_type = dis_dref;
		info->data_size = 4;
	      }
	    break;
	  case 'D':
	    nbits = 5;
	    shift = 3;
	    immed = GET_OP (l, IMM5);
	    info->insn_type = dis_dref;
	    info->data_size = 8;
	    break;
	  case 'j':
	    nbits = 5;
	    immed = GET_OP (l, IMM5);
	    signedp = 1;
	    break;
	  case '6':
	    nbits = 6;
	    immed = GET_OP (l, IMM6);
	    break;
	  case '8':
	    nbits = 8;
	    immed = GET_OP (l, IMM8);
	    break;
	  case 'V':
	    nbits = 8;
	    shift = 2;
	    immed = GET_OP (l, IMM8);
	    /* FIXME: This might be lw, or it might be addiu to $sp or
               $pc.  We assume it's load.  */
	    info->insn_type = dis_dref;
	    info->data_size = 4;
	    break;
	  case 'C':
	    nbits = 8;
	    shift = 3;
	    immed = GET_OP (l, IMM8);
	    info->insn_type = dis_dref;
	    info->data_size = 8;
	    break;
	  case 'U':
	    nbits = 8;
	    immed = GET_OP (l, IMM8);
	    extu = 1;
	    break;
	  case 'k':
	    nbits = 8;
	    immed = GET_OP (l, IMM8);
	    signedp = 1;
	    break;
	  case 'K':
	    nbits = 8;
	    shift = 3;
	    immed = GET_OP (l, IMM8);
	    signedp = 1;
	    break;
	  case 'p':
	    nbits = 8;
	    immed = GET_OP (l, IMM8);
	    signedp = 1;
	    pcrel = 1;
	    branch = 1;
	    break;
	  case 'q':
	    nbits = 11;
	    immed = GET_OP (l, IMM11);
	    signedp = 1;
	    pcrel = 1;
	    branch = 1;
	    break;
	  case 'A':
	    nbits = 8;
	    shift = 2;
	    immed = GET_OP (l, IMM8);
	    pcrel = 1;
	    /* FIXME: This can be lw or la.  We assume it is lw.  */
	    info->insn_type = dis_dref;
	    info->data_size = 4;
	    break;
	  case 'B':
	    nbits = 5;
	    shift = 3;
	    immed = GET_OP (l, IMM5);
	    pcrel = 1;
	    info->insn_type = dis_dref;
	    info->data_size = 8;
	    break;
	  case 'E':
	    nbits = 5;
	    shift = 2;
	    immed = GET_OP (l, IMM5);
	    pcrel = 1;
	    break;
	  default:
	    abort ();
	  }

	if (! use_extend)
	  {
	    if (signedp && immed >= (1 << (nbits - 1)))
	      immed -= 1 << nbits;
	    immed <<= shift;
	    if ((type == '<' || type == '>' || type == '[' || type == ']')
		&& immed == 0)
	      immed = 8;
	  }
	else
	  {
	    if (extbits == 16)
	      immed |= ((extend & 0x1f) << 11) | (extend & 0x7e0);
	    else if (extbits == 15)
	      immed |= ((extend & 0xf) << 11) | (extend & 0x7f0);
	    else
	      immed = ((extend >> 6) & 0x1f) | (extend & 0x20);
	    immed &= (1 << extbits) - 1;
	    if (! extu && immed >= (1 << (extbits - 1)))
	      immed -= 1 << extbits;
	  }

	if (! pcrel)
	  infprintf (is, "%d", immed);
	else
	  {
	    bfd_vma baseaddr;

	    if (branch)
	      {
		immed *= 2;
		baseaddr = memaddr + 2;
	      }
	    else if (use_extend)
	      baseaddr = memaddr - 2;
	    else
	      {
		int status;
		bfd_byte buffer[2];

		baseaddr = memaddr;

		/* If this instruction is in the delay slot of a jr
                   instruction, the base address is the address of the
                   jr instruction.  If it is in the delay slot of jalr
                   instruction, the base address is the address of the
                   jalr instruction.  This test is unreliable: we have
                   no way of knowing whether the previous word is
                   instruction or data.  */
		status = (*info->read_memory_func) (memaddr - 4, buffer, 2,
						    info);
		if (status == 0
		    && (((info->endian == BFD_ENDIAN_BIG
			  ? bfd_getb16 (buffer)
			  : bfd_getl16 (buffer))
			 & 0xf800) == 0x1800))
		  baseaddr = memaddr - 4;
		else
		  {
		    status = (*info->read_memory_func) (memaddr - 2, buffer,
							2, info);
		    if (status == 0
			&& (((info->endian == BFD_ENDIAN_BIG
			      ? bfd_getb16 (buffer)
			      : bfd_getl16 (buffer))
			     & 0xf81f) == 0xe800))
		      baseaddr = memaddr - 2;
		  }
	      }
	    info->target = (baseaddr & ~((1 << shift) - 1)) + immed;
	    if (pcrel && branch
		&& info->flavour == bfd_target_unknown_flavour)
	      /* For gdb disassembler, maintain odd address.  */
	      info->target |= 1;
	    (*info->print_address_func) (info->target, info);
	  }
      }
      break;

    case 'a':
      {
	int jalx = l & 0x400;

	if (! use_extend)
	  extend = 0;
	l = ((l & 0x1f) << 23) | ((l & 0x3e0) << 13) | (extend << 2);
	if (!jalx && info->flavour == bfd_target_unknown_flavour)
	  /* For gdb disassembler, maintain odd address.  */
	  l |= 1;
      }
      info->target = ((memaddr + 4) & ~(bfd_vma) 0x0fffffff) | l;
      (*info->print_address_func) (info->target, info);
      break;

    case 'l':
    case 'L':
      {
	int need_comma, amask, smask;

	need_comma = 0;

	l = GET_OP (l, IMM6);

	amask = (l >> 3) & 7;

	if (amask > 0 && amask < 5)
	  {
	    infprintf (is, "%s", mips_gpr_names[4]);
	    if (amask > 1)
	      infprintf (is, "-%s", mips_gpr_names[amask + 3]);
	    need_comma = 1;
	  }

	smask = (l >> 1) & 3;
	if (smask == 3)
	  {
	    infprintf (is, "%s??", need_comma ? "," : "");
	    need_comma = 1;
	  }
	else if (smask > 0)
	  {
	    infprintf (is, "%s%s", need_comma ? "," : "", mips_gpr_names[16]);
	    if (smask > 1)
	      infprintf (is, "-%s", mips_gpr_names[smask + 15]);
	    need_comma = 1;
	  }

	if (l & 1)
	  {
	    infprintf (is, "%s%s", need_comma ? "," : "", mips_gpr_names[31]);
	    need_comma = 1;
	  }

	if (amask == 5 || amask == 6)
	  {
	    infprintf (is, "%s$f0", need_comma ? "," : "");
	    if (amask == 6)
	      infprintf (is, "-$f1");
	  }
      }
      break;

    case 'm':
    case 'M':
      /* MIPS16e save/restore.  */
      {
      int need_comma = 0;
      int amask, args, statics;
      int nsreg, smask;
      int framesz;
      int i, j;

      l = l & 0x7f;
      if (use_extend)
        l |= extend << 16;

      amask = (l >> 16) & 0xf;
      if (amask == MIPS16_ALL_ARGS)
        {
          args = 4;
          statics = 0;
        }
      else if (amask == MIPS16_ALL_STATICS)
        {
          args = 0;
          statics = 4;
        }
      else
        {
          args = amask >> 2;
          statics = amask & 3;
        }

      if (args > 0) {
	  infprintf (is, "%s", mips_gpr_names[4]);
          if (args > 1)
	    infprintf (is, "-%s", mips_gpr_names[4 + args - 1]);
          need_comma = 1;
      }

      framesz = (((l >> 16) & 0xf0) | (l & 0x0f)) * 8;
      if (framesz == 0 && !use_extend)
        framesz = 128;

      infprintf (is, "%s%d", need_comma ? "," : "", framesz);

      if (l & 0x40)                   /* $ra */
	infprintf (is, ",%s", mips_gpr_names[31]);

      nsreg = (l >> 24) & 0x7;
      smask = 0;
      if (l & 0x20)                   /* $s0 */
        smask |= 1 << 0;
      if (l & 0x10)                   /* $s1 */
        smask |= 1 << 1;
      if (nsreg > 0)                  /* $s2-$s8 */
        smask |= ((1 << nsreg) - 1) << 2;

      /* Find first set static reg bit.  */
      for (i = 0; i < 9; i++)
        {
          if (smask & (1 << i))
            {
	      infprintf (is, ",%s", mips_gpr_names[i == 8 ? 30 : (16 + i)]);
              /* Skip over string of set bits.  */
              for (j = i; smask & (2 << j); j++)
                continue;
              if (j > i)
		infprintf (is, "-%s", mips_gpr_names[j == 8 ? 30 : (16 + j)]);
              i = j + 1;
            }
        }

      /* Statics $ax - $a3.  */
      if (statics == 1)
	infprintf (is, ",%s", mips_gpr_names[7]);
      else if (statics > 0) 
	infprintf (is, ",%s-%s",
		   mips_gpr_names[7 - statics + 1],
		   mips_gpr_names[7]);
      }
      break;

    default:
      /* xgettext:c-format */
      infprintf (is,
		 _("# internal disassembler error, "
		   "unrecognised modifier (%c)"),
		 type);
      abort ();
    }
}


/* Check if the given address is the last word of a MIPS16 PLT entry.
   This word is data and depending on the value it may interfere with
   disassembly of further PLT entries.  We make use of the fact PLT
   symbols are marked BSF_SYNTHETIC.  */
static bfd_boolean
is_mips16_plt_tail (struct disassemble_info *info, bfd_vma addr)
{
  if (info->symbols
      && info->symbols[0]
      && (info->symbols[0]->flags & BSF_SYNTHETIC)
      && addr == bfd_asymbol_value (info->symbols[0]) + 12)
    return TRUE;

  return FALSE;
}

/* Disassemble mips16 instructions.  */

static int
print_insn_mips16 (bfd_vma memaddr, struct disassemble_info *info)
{
  const fprintf_ftype infprintf = info->fprintf_func;
  int status;
  bfd_byte buffer[4];
  int length;
  int insn;
  bfd_boolean use_extend;
  int extend = 0;
  const struct mips_opcode *op, *opend;
  void *is = info->stream;

  info->bytes_per_chunk = 2;
  info->display_endian = info->endian;
  info->insn_info_valid = 1;
  info->branch_delay_insns = 0;
  info->data_size = 0;
  info->target = 0;
  info->target2 = 0;

  /* Decode PLT entry's GOT slot address word.  */
  if (is_mips16_plt_tail (info, memaddr))
    {
      info->insn_type = dis_noninsn;
      status = (*info->read_memory_func) (memaddr, buffer, 4, info);
      if (status == 0)
	{
	  unsigned int gotslot;

	  if (info->endian == BFD_ENDIAN_BIG)
	    gotslot = bfd_getb32 (buffer);
	  else
	    gotslot = bfd_getl32 (buffer);
	  infprintf (is, ".word\t0x%x", gotslot);

	  return 4;
	}
    }
  else
    {
      info->insn_type = dis_nonbranch;
      status = (*info->read_memory_func) (memaddr, buffer, 2, info);
    }
  if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return -1;
    }

  length = 2;

  if (info->endian == BFD_ENDIAN_BIG)
    insn = bfd_getb16 (buffer);
  else
    insn = bfd_getl16 (buffer);

  /* Handle the extend opcode specially.  */
  use_extend = FALSE;
  if ((insn & 0xf800) == 0xf000)
    {
      use_extend = TRUE;
      extend = insn & 0x7ff;

      memaddr += 2;

      status = (*info->read_memory_func) (memaddr, buffer, 2, info);
      if (status != 0)
	{
	  infprintf (is, "extend 0x%x", (unsigned int) extend);
	  (*info->memory_error_func) (status, memaddr, info);
	  return -1;
	}

      if (info->endian == BFD_ENDIAN_BIG)
	insn = bfd_getb16 (buffer);
      else
	insn = bfd_getl16 (buffer);

      /* Check for an extend opcode followed by an extend opcode.  */
      if ((insn & 0xf800) == 0xf000)
	{
	  infprintf (is, "extend 0x%x", (unsigned int) extend);
	  info->insn_type = dis_noninsn;
	  return length;
	}

      length += 2;
    }

  /* FIXME: Should probably use a hash table on the major opcode here.  */

  opend = mips16_opcodes + bfd_mips16_num_opcodes;
  for (op = mips16_opcodes; op < opend; op++)
    {
      if (op->pinfo != INSN_MACRO
	  && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
	  && (insn & op->mask) == op->match)
	{
	  const char *s;

	  if (strchr (op->args, 'a') != NULL)
	    {
	      if (use_extend)
		{
		  infprintf (is, "extend 0x%x", (unsigned int) extend);
		  info->insn_type = dis_noninsn;
		  return length - 2;
		}

	      use_extend = FALSE;

	      memaddr += 2;

	      status = (*info->read_memory_func) (memaddr, buffer, 2,
						  info);
	      if (status == 0)
		{
		  use_extend = TRUE;
		  if (info->endian == BFD_ENDIAN_BIG)
		    extend = bfd_getb16 (buffer);
		  else
		    extend = bfd_getl16 (buffer);
		  length += 2;
		}
	    }

	  infprintf (is, "%s", op->name);
	  if (op->args[0] != '\0')
	    infprintf (is, "\t");

	  for (s = op->args; *s != '\0'; s++)
	    {
	      if (*s == ','
		  && s[1] == 'w'
		  && GET_OP (insn, RX) == GET_OP (insn, RY))
		{
		  /* Skip the register and the comma.  */
		  ++s;
		  continue;
		}
	      if (*s == ','
		  && s[1] == 'v'
		  && GET_OP (insn, RZ) == GET_OP (insn, RX))
		{
		  /* Skip the register and the comma.  */
		  ++s;
		  continue;
		}
	      print_mips16_insn_arg (*s, op, insn, use_extend, extend, memaddr,
				     info);
	    }

	  /* Figure out branch instruction type and delay slot information.  */
	  if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
	    info->branch_delay_insns = 1;
	  if ((op->pinfo & (INSN_UNCOND_BRANCH_DELAY
			    | MIPS16_INSN_UNCOND_BRANCH)) != 0)
	    {
	      if ((op->pinfo & INSN_WRITE_GPR_31) != 0)
		info->insn_type = dis_jsr;
	      else
		info->insn_type = dis_branch;
	    }
	  else if ((op->pinfo & MIPS16_INSN_COND_BRANCH) != 0)
	    info->insn_type = dis_condbranch;

	  return length;
	}
    }
#undef GET_OP_S
#undef GET_OP

  if (use_extend)
    infprintf (is, "0x%x", extend | 0xf000);
  infprintf (is, "0x%x", insn);
  info->insn_type = dis_noninsn;

  return length;
}

/* Disassemble microMIPS instructions.  */

static int
print_insn_micromips (bfd_vma memaddr, struct disassemble_info *info)
{
  const fprintf_ftype infprintf = info->fprintf_func;
  const struct mips_opcode *op, *opend;
  unsigned int lsb, msbd, msb;
  void *is = info->stream;
  unsigned int regno;
  bfd_byte buffer[2];
  int lastregno = 0;
  int higher;
  int length;
  int status;
  int delta;
  int immed;
  int insn;

  lsb = 0;

  info->bytes_per_chunk = 2;
  info->display_endian = info->endian;
  info->insn_info_valid = 1;
  info->branch_delay_insns = 0;
  info->data_size = 0;
  info->insn_type = dis_nonbranch;
  info->target = 0;
  info->target2 = 0;

  status = (*info->read_memory_func) (memaddr, buffer, 2, info);
  if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return -1;
    }

  length = 2;

  if (info->endian == BFD_ENDIAN_BIG)
    insn = bfd_getb16 (buffer);
  else
    insn = bfd_getl16 (buffer);

  if ((insn & 0xfc00) == 0x7c00)
    {
      /* This is a 48-bit microMIPS instruction.  */
      higher = insn;

      status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info);
      if (status != 0)
	{
	  infprintf (is, "micromips 0x%x", higher);
	  (*info->memory_error_func) (status, memaddr + 2, info);
	  return -1;
	}
      if (info->endian == BFD_ENDIAN_BIG)
	insn = bfd_getb16 (buffer);
      else
	insn = bfd_getl16 (buffer);
      higher = (higher << 16) | insn;

      status = (*info->read_memory_func) (memaddr + 4, buffer, 2, info);
      if (status != 0)
	{
	  infprintf (is, "micromips 0x%x", higher);
	  (*info->memory_error_func) (status, memaddr + 4, info);
	  return -1;
	}
      if (info->endian == BFD_ENDIAN_BIG)
	insn = bfd_getb16 (buffer);
      else
	insn = bfd_getl16 (buffer);
      infprintf (is, "0x%x%04x (48-bit insn)", higher, insn);

      info->insn_type = dis_noninsn;
      return 6;
    }
  else if ((insn & 0x1c00) == 0x0000 || (insn & 0x1000) == 0x1000)
    {
      /* This is a 32-bit microMIPS instruction.  */
      higher = insn;

      status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info);
      if (status != 0)
	{
	  infprintf (is, "micromips 0x%x", higher);
	  (*info->memory_error_func) (status, memaddr + 2, info);
	  return -1;
	}

      if (info->endian == BFD_ENDIAN_BIG)
	insn = bfd_getb16 (buffer);
      else
	insn = bfd_getl16 (buffer);

      insn = insn | (higher << 16);

      length += 2;
    }

  /* FIXME: Should probably use a hash table on the major opcode here.  */

#define GET_OP(insn, field) \
  (((insn) >> MICROMIPSOP_SH_##field) & MICROMIPSOP_MASK_##field)
#define GET_OP_S(insn, field) \
  ((GET_OP (insn, field) ^ ((MICROMIPSOP_MASK_##field >> 1) + 1)) \
   - ((MICROMIPSOP_MASK_##field >> 1) + 1))
  opend = micromips_opcodes + bfd_micromips_num_opcodes;
  for (op = micromips_opcodes; op < opend; op++)
    {
      if (op->pinfo != INSN_MACRO
	  && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
	  && (insn & op->mask) == op->match
	  && ((length == 2 && (op->mask & 0xffff0000) == 0)
	      || (length == 4 && (op->mask & 0xffff0000) != 0)))
	{
	  const char *s;

	  infprintf (is, "%s", op->name);
	  if (op->args[0] != '\0')
	    infprintf (is, "\t");

	  for (s = op->args; *s != '\0'; s++)
	    {
	      switch (*s)
		{
		case ',':
		case '(':
		case ')':
		  infprintf (is, "%c", *s);
		  break;

		case '.':
		  infprintf (is, "%d", GET_OP_S (insn, OFFSET10));
		  break;

		case '1':
		  infprintf (is, "0x%x", GET_OP (insn, STYPE));
		  break;

		case '2':
		  infprintf (is, "0x%x", GET_OP (insn, BP));
		  break;

		case '3':
		  infprintf (is, "0x%x", GET_OP (insn, SA3));
		  break;

		case '4':
		  infprintf (is, "0x%x", GET_OP (insn, SA4));
		  break;

		case '5':
		  infprintf (is, "0x%x", GET_OP (insn, IMM8));
		  break;

		case '6':
		  infprintf (is, "0x%x", GET_OP (insn, RS));
		  break;

		case '7':
		  infprintf (is, "$ac%d", GET_OP (insn, DSPACC));
		  break;

		case '8':
		  infprintf (is, "0x%x", GET_OP (insn, WRDSP));
		  break;

		case '0': /* DSP 6-bit signed immediate in bit 16.  */
		  delta = (GET_OP (insn, DSPSFT) ^ 0x20) - 0x20;
		  infprintf (is, "%d", delta);
		  break;

		case '<':
		  infprintf (is, "0x%x", GET_OP (insn, SHAMT));
		  break;

		case '\\':
		  infprintf (is, "0x%x", GET_OP (insn, 3BITPOS));
		  break;

		case '^':
		  infprintf (is, "0x%x", GET_OP (insn, RD));
		  break;

		case '|':
		  infprintf (is, "0x%x", GET_OP (insn, TRAP));
		  break;

		case '~':
		  infprintf (is, "%d", GET_OP_S (insn, OFFSET12));
		  break;

		case 'a':
		  if (strcmp (op->name, "jalx") == 0)
		    info->target = (((memaddr + 4) & ~(bfd_vma) 0x0fffffff)
				    | (GET_OP (insn, TARGET) << 2));
		  else
		    info->target = (((memaddr + 4) & ~(bfd_vma) 0x07ffffff)
				    | (GET_OP (insn, TARGET) << 1));
		  /* For gdb disassembler, force odd address on jalx.  */
		  if (info->flavour == bfd_target_unknown_flavour
		      && strcmp (op->name, "jalx") == 0)
		    info->target |= 1;
		  (*info->print_address_func) (info->target, info);
		  break;

		case 'b':
		case 'r':
		case 's':
		case 'v':
		  infprintf (is, "%s", mips_gpr_names[GET_OP (insn, RS)]);
		  break;

		case 'c':
		  infprintf (is, "0x%x", GET_OP (insn, CODE));
		  break;

		case 'd':
		  infprintf (is, "%s", mips_gpr_names[GET_OP (insn, RD)]);
		  break;

		case 'h':
		  infprintf (is, "0x%x", GET_OP (insn, PREFX));
		  break;

		case 'i':
		case 'u':
		  infprintf (is, "0x%x", GET_OP (insn, IMMEDIATE));
		  break;

		case 'j': /* Same as i, but sign-extended.  */
		case 'o':
		  infprintf (is, "%d", GET_OP_S (insn, DELTA));
		  break;

		case 'k':
		  infprintf (is, "0x%x", GET_OP (insn, CACHE));
		  break;

		case 'n':
		  {
		    int s_reg_encode;

		    immed = GET_OP (insn, RT);
		    s_reg_encode = immed & 0xf;
		    if (s_reg_encode != 0)
		      {
			if (s_reg_encode == 1)
			  infprintf (is, "%s", mips_gpr_names[16]);
			else if (s_reg_encode < 9)
			  infprintf (is, "%s-%s",
				   mips_gpr_names[16],
				   mips_gpr_names[15 + s_reg_encode]);
			else if (s_reg_encode == 9)
			  infprintf (is, "%s-%s,%s",
				   mips_gpr_names[16],
				   mips_gpr_names[23],
				   mips_gpr_names[30]);
			else
			  infprintf (is, "UNKNOWN");
		      }

		    if (immed & 0x10) /* For ra.  */
		      {
			if (s_reg_encode == 0)
			  infprintf (is, "%s", mips_gpr_names[31]);
			else
			  infprintf (is, ",%s", mips_gpr_names[31]);
		      }
		    break;
		  }

		case 'p':
		  /* Sign-extend the displacement.  */
		  delta = GET_OP_S (insn, DELTA);
		  info->target = (delta << 1) + memaddr + length;
		  (*info->print_address_func) (info->target, info);
		  break;

		case 'q':
		  infprintf (is, "0x%x", GET_OP (insn, CODE2));
		  break;

		case 't':
		case 'w':
		  infprintf (is, "%s", mips_gpr_names[GET_OP (insn, RT)]);
		  break;

		case 'y':
		  infprintf (is, "%s", mips_gpr_names[GET_OP (insn, RS3)]);
		  break;

		case 'z':
		  infprintf (is, "%s", mips_gpr_names[0]);
		  break;

		case '@': /* DSP 10-bit signed immediate in bit 16.  */
		  delta = (GET_OP (insn, IMM10) ^ 0x200) - 0x200;
		  infprintf (is, "%d", delta);
		  break;

		case 'B':
		  infprintf (is, "0x%x", GET_OP (insn, CODE10));
		  break;

		case 'C':
		  infprintf (is, "0x%x", GET_OP (insn, COPZ));
		  break;

		case 'D':
		  infprintf (is, "%s", mips_fpr_names[GET_OP (insn, FD)]);
		  break;

		case 'E':
		  /* Coprocessor register for lwcN instructions, et al.

		    Note that there is no load/store cp0 instructions, and
		    that FPU (cp1) instructions disassemble this field using
		    'T' format.  Therefore, until we gain understanding of
		    cp2 register names, we can simply print the register
		    numbers.  */
		  infprintf (is, "$%d", GET_OP (insn, RT));
		  break;

		case 'G':
		  /* Coprocessor register for mtcN instructions, et al.  Note
		     that FPU (cp1) instructions disassemble this field using
		     'S' format.  Therefore, we only need to worry about cp0,
		     cp2, and cp3.  */
		  if (op->name[strlen (op->name) - 1] == '0')
		    {
		      if (s[1] == ',' && s[2] == 'H')
			{
			  const struct mips_cp0sel_name *n;
			  unsigned int cp0reg, sel;

			  cp0reg = GET_OP (insn, RS);
			  sel = GET_OP (insn, SEL);

			  /* CP0 register including 'sel' code for mtcN
			     (et al.), to be printed textually if known.
			     If not known, print both CP0 register name and
			     sel numerically since CP0 register with sel 0 may
			     have a name unrelated to register being
			     printed.  */
			  n = lookup_mips_cp0sel_name (mips_cp0sel_names,
						       mips_cp0sel_names_len,
						       cp0reg, sel);
			  if (n != NULL)
			    infprintf (is, "%s", n->name);
			  else
			    infprintf (is, "$%d,%d", cp0reg, sel);
			  s += 2;
			}
		      else
			infprintf (is, "%s", mips_cp0_names[GET_OP (insn, RS)]);
		    }
		  else
		    infprintf (is, "$%d", GET_OP (insn, RS));
		  break;

		case 'H':
		  infprintf (is, "%d", GET_OP (insn, SEL));
		  break;

		case 'K':
		  infprintf (is, "%s", mips_hwr_names[GET_OP (insn, RS)]);
		  break;

		case 'M':
		  infprintf (is, "$fcc%d", GET_OP (insn, CCC));
		  break;

		case 'N':
		  infprintf (is,
			   (op->pinfo & (FP_D | FP_S)) != 0
			   ? "$fcc%d" : "$cc%d",
			   GET_OP (insn, BCC));
		  break;

		case 'R':
		  infprintf (is, "%s", mips_fpr_names[GET_OP (insn, FR)]);
		  break;

		case 'S':
		case 'V':
		  infprintf (is, "%s", mips_fpr_names[GET_OP (insn, FS)]);
		  break;

		case 'T':
		  infprintf (is, "%s", mips_fpr_names[GET_OP (insn, FT)]);
		  break;

		case '+':
		  /* Extension character; switch for second char.  */
		  s++;
		  switch (*s)
		    {
		    case 'A':
		      lsb = GET_OP (insn, EXTLSB);
		      infprintf (is, "0x%x", lsb);
		      break;

		    case 'B':
		      msb = GET_OP (insn, INSMSB);
		      infprintf (is, "0x%x", msb - lsb + 1);
		      break;

		    case 'C':
		    case 'H':
		      msbd = GET_OP (insn, EXTMSBD);
		      infprintf (is, "0x%x", msbd + 1);
		      break;

		    case 'E':
		      lsb = GET_OP (insn, EXTLSB) + 32;
		      infprintf (is, "0x%x", lsb);
		      break;

		    case 'F':
		      msb = GET_OP (insn, INSMSB) + 32;
		      infprintf (is, "0x%x", msb - lsb + 1);
		      break;

		    case 'G':
		      msbd = GET_OP (insn, EXTMSBD) + 32;
		      infprintf (is, "0x%x", msbd + 1);
		      break;

		    case 'j':   /* 9-bit signed offset in bit 0. */
		      delta = GET_OP_S (insn, EVAOFFSET);
		      infprintf (is, "%d", delta);
		      break;

		    default:
		      /* xgettext:c-format */
		      infprintf (is,
			       _("# internal disassembler error, "
				 "unrecognized modifier (+%c)"),
			       *s);
		      abort ();
		    }
		  break;

		case 'm':
		  /* Extension character; switch for second char.  */
		  s++;
		  switch (*s)
		    {
		    case 'a':	/* global pointer.  */
		      infprintf (is, "%s", mips_gpr_names[28]);
		      break;

		    case 'b':
		      regno = micromips_to_32_reg_b_map[GET_OP (insn, MB)];
		      infprintf (is, "%s", mips_gpr_names[regno]);
		      break;

		    case 'c':
		      regno = micromips_to_32_reg_c_map[GET_OP (insn, MC)];
		      infprintf (is, "%s", mips_gpr_names[regno]);
		      break;

		    case 'd':
		      regno = micromips_to_32_reg_d_map[GET_OP (insn, MD)];
		      infprintf (is, "%s", mips_gpr_names[regno]);
		      break;

		    case 'e':
		      regno = micromips_to_32_reg_e_map[GET_OP (insn, ME)];
		      infprintf (is, "%s", mips_gpr_names[regno]);
		      break;

		    case 'f':
		      /* Save lastregno for "mt" to print out later.  */
		      lastregno = micromips_to_32_reg_f_map[GET_OP (insn, MF)];
		      infprintf (is, "%s", mips_gpr_names[lastregno]);
		      break;

		    case 'g':
		      regno = micromips_to_32_reg_g_map[GET_OP (insn, MG)];
		      infprintf (is, "%s", mips_gpr_names[regno]);
		      break;

		    case 'h':
		      regno = micromips_to_32_reg_h_map1[GET_OP (insn, MH)];
		      infprintf (is, "%s", mips_gpr_names[regno]);
		      regno = micromips_to_32_reg_h_map2[GET_OP (insn, MH)];
		      infprintf (is, ",%s", mips_gpr_names[regno]);
		      break;

		    case 'j':
		      infprintf (is, "%s", mips_gpr_names[GET_OP (insn, MJ)]);
		      break;

		    case 'l':
		      regno = micromips_to_32_reg_l_map[GET_OP (insn, ML)];
		      infprintf (is, "%s", mips_gpr_names[regno]);
		      break;

		    case 'm':
		      regno = micromips_to_32_reg_m_map[GET_OP (insn, MM)];
		      infprintf (is, "%s", mips_gpr_names[regno]);
		      break;

		    case 'n':
		      regno = micromips_to_32_reg_n_map[GET_OP (insn, MN)];
		      infprintf (is, "%s", mips_gpr_names[regno]);
		      break;

		    case 'p':
		      /* Save lastregno for "mt" to print out later.  */
		      lastregno = GET_OP (insn, MP);
		      infprintf (is, "%s", mips_gpr_names[lastregno]);
		      break;

		    case 'q':
		      regno = micromips_to_32_reg_q_map[GET_OP (insn, MQ)];
		      infprintf (is, "%s", mips_gpr_names[regno]);
		      break;

		    case 'r':	/* program counter.  */
		      infprintf (is, "$pc");
		      break;

		    case 's':	/* stack pointer.  */
		      lastregno = 29;
		      infprintf (is, "%s", mips_gpr_names[29]);
		      break;

		    case 't':
		      infprintf (is, "%s", mips_gpr_names[lastregno]);
		      break;

		    case 'z':	/* $0.  */
		      infprintf (is, "%s", mips_gpr_names[0]);
		      break;

		    case 'A':
		      /* Sign-extend the immediate.  */
		      immed = GET_OP_S (insn, IMMA) << 2;
		      infprintf (is, "%d", immed);
		      break;

		    case 'B':
		      immed = micromips_imm_b_map[GET_OP (insn, IMMB)];
		      infprintf (is, "%d", immed);
		      break;

		    case 'C':
		      immed = micromips_imm_c_map[GET_OP (insn, IMMC)];
		      infprintf (is, "0x%x", immed);
		      break;

		    case 'D':
		      /* Sign-extend the displacement.  */
		      delta = GET_OP_S (insn, IMMD);
		      info->target = (delta << 1) + memaddr + length;
		      (*info->print_address_func) (info->target, info);
		      break;

		    case 'E':
		      /* Sign-extend the displacement.  */
		      delta = GET_OP_S (insn, IMME);
		      info->target = (delta << 1) + memaddr + length;
		      (*info->print_address_func) (info->target, info);
		      break;

		    case 'F':
		      immed = GET_OP (insn, IMMF);
		      infprintf (is, "0x%x", immed);
		      break;

		    case 'G':
		      immed = (insn >> MICROMIPSOP_SH_IMMG) + 1;
		      immed = (immed & MICROMIPSOP_MASK_IMMG) - 1;
		      infprintf (is, "%d", immed);
		      break;

		    case 'H':
		      immed = GET_OP (insn, IMMH) << 1;
		      infprintf (is, "%d", immed);
		      break;

		    case 'I':
		      immed = (insn >> MICROMIPSOP_SH_IMMI) + 1;
		      immed = (immed & MICROMIPSOP_MASK_IMMI) - 1;
		      infprintf (is, "%d", immed);
		      break;

		    case 'J':
		      immed = GET_OP (insn, IMMJ) << 2;
		      infprintf (is, "%d", immed);
		      break;

		    case 'L':
		      immed = GET_OP (insn, IMML);
		      infprintf (is, "%d", immed);
		      break;

		    case 'M':
		      immed = (insn >> MICROMIPSOP_SH_IMMM) - 1;
		      immed = (immed & MICROMIPSOP_MASK_IMMM) + 1;
		      infprintf (is, "%d", immed);
		      break;

		    case 'N':
		      immed = GET_OP (insn, IMMN);
		      if (immed == 0)
			infprintf (is, "%s,%s",
				 mips_gpr_names[16],
				 mips_gpr_names[31]);
		      else
			infprintf (is, "%s-%s,%s",
				 mips_gpr_names[16],
				 mips_gpr_names[16 + immed],
				 mips_gpr_names[31]);
		      break;

		    case 'O':
		      immed = GET_OP (insn, IMMO);
		      infprintf (is, "0x%x", immed);
		      break;

		    case 'P':
		      immed = GET_OP (insn, IMMP) << 2;
		      infprintf (is, "%d", immed);
		      break;

		    case 'Q':
		      /* Sign-extend the immediate.  */
		      immed = GET_OP_S (insn, IMMQ) << 2;
		      infprintf (is, "%d", immed);
		      break;

		    case 'U':
		      immed = GET_OP (insn, IMMU) << 2;
		      infprintf (is, "%d", immed);
		      break;

		    case 'W':
		      immed = GET_OP (insn, IMMW) << 2;
		      infprintf (is, "%d", immed);
		      break;

		    case 'X':
		      /* Sign-extend the immediate.  */
		      immed = GET_OP_S (insn, IMMX);
		      infprintf (is, "%d", immed);
		      break;

		    case 'Y':
		      /* Sign-extend the immediate.  */
		      immed = GET_OP_S (insn, IMMY) << 2;
		      if ((unsigned int) (immed + 8) < 16)
			immed ^= 0x400;
		      infprintf (is, "%d", immed);
		      break;

		    default:
		      /* xgettext:c-format */
		      infprintf (is,
			       _("# internal disassembler error, "
				 "unrecognized modifier (m%c)"),
			       *s);
		      abort ();
		    }
		  break;

		default:
		  /* xgettext:c-format */
		  infprintf (is,
			   _("# internal disassembler error, "
			     "unrecognized modifier (%c)"),
			   *s);
		  abort ();
		}
	    }

	  /* Figure out instruction type and branch delay information.  */
	  if ((op->pinfo
	       & (INSN_UNCOND_BRANCH_DELAY | INSN_COND_BRANCH_DELAY)) != 0)
	    info->branch_delay_insns = 1;
	  if (((op->pinfo & INSN_UNCOND_BRANCH_DELAY)
	       | (op->pinfo2 & INSN2_UNCOND_BRANCH)) != 0)
	    {
	      if ((op->pinfo & (INSN_WRITE_GPR_31 | INSN_WRITE_GPR_T)) != 0)
		info->insn_type = dis_jsr;
	      else
		info->insn_type = dis_branch;
	    }
	  else if (((op->pinfo & INSN_COND_BRANCH_DELAY)
		    | (op->pinfo2 & INSN2_COND_BRANCH)) != 0)
	    {
	      if ((op->pinfo & INSN_WRITE_GPR_31) != 0)
		info->insn_type = dis_condjsr;
	      else
		info->insn_type = dis_condbranch;
	    }
	  else if ((op->pinfo
		    & (INSN_STORE_MEMORY | INSN_LOAD_MEMORY_DELAY)) != 0)
	    info->insn_type = dis_dref;

	  return length;
	}
    }
#undef GET_OP_S
#undef GET_OP

  infprintf (is, "0x%x", insn);
  info->insn_type = dis_noninsn;

  return length;
}

/* Return 1 if a symbol associated with the location being disassembled
   indicates a compressed (MIPS16 or microMIPS) mode.  We iterate over
   all the symbols at the address being considered assuming if at least
   one of them indicates code compression, then such code has been
   genuinely produced here (other symbols could have been derived from
   function symbols defined elsewhere or could define data).  Otherwise,
   return 0.  */

static bfd_boolean
is_compressed_mode_p (struct disassemble_info *info)
{
  int i;
  int l;

  for (i = info->symtab_pos, l = i + info->num_symbols; i < l; i++)
    if (((info->symtab[i])->flags & BSF_SYNTHETIC) != 0
	&& ((!micromips_ase
	     && ELF_ST_IS_MIPS16 ((*info->symbols)->udata.i))
	    || (micromips_ase
		&& ELF_ST_IS_MICROMIPS ((*info->symbols)->udata.i))))
      return 1;
    else if (bfd_asymbol_flavour (info->symtab[i]) == bfd_target_elf_flavour
	      && info->symtab[i]->section == info->section)
      {
	elf_symbol_type *symbol = (elf_symbol_type *) info->symtab[i];
	if ((!micromips_ase
	     && ELF_ST_IS_MIPS16 (symbol->internal_elf_sym.st_other))
	    || (micromips_ase
		&& ELF_ST_IS_MICROMIPS (symbol->internal_elf_sym.st_other)))
	  return 1;
      }

  return 0;
}

/* In an environment where we do not know the symbol type of the
   instruction we are forced to assume that the low order bit of the
   instructions' address may mark it as a mips16 instruction.  If we
   are single stepping, or the pc is within the disassembled function,
   this works.  Otherwise, we need a clue.  Sometimes.  */

static int
_print_insn_mips (bfd_vma memaddr,
		  struct disassemble_info *info,
		  enum bfd_endian endianness)
{
  int (*print_insn_compr) (bfd_vma, struct disassemble_info *);
  bfd_byte buffer[INSNLEN];
  int status;

  set_default_mips_dis_options (info);
  parse_mips_dis_options (info->disassembler_options);

  if (info->mach == bfd_mach_mips16)
    return print_insn_mips16 (memaddr, info);
  if (info->mach == bfd_mach_mips_micromips)
    return print_insn_micromips (memaddr, info);

  print_insn_compr = !micromips_ase ? print_insn_mips16 : print_insn_micromips;

#if 1
  /* FIXME: If odd address, this is CLEARLY a compressed instruction.  */
  /* Only a few tools will work this way.  */
  if (memaddr & 0x01)
    return print_insn_compr (memaddr, info);
#endif

#if SYMTAB_AVAILABLE
  if (is_compressed_mode_p (info))
    return print_insn_compr (memaddr, info);
#endif

  status = (*info->read_memory_func) (memaddr, buffer, INSNLEN, info);
  if (status == 0)
    {
      int insn;

      if (endianness == BFD_ENDIAN_BIG)
	insn = bfd_getb32 (buffer);
      else
	insn = bfd_getl32 (buffer);

      return print_insn_mips (memaddr, insn, info);
    }
  else
    {
      (*info->memory_error_func) (status, memaddr, info);
      return -1;
    }
}

int
print_insn_big_mips (bfd_vma memaddr, struct disassemble_info *info)
{
  return _print_insn_mips (memaddr, info, BFD_ENDIAN_BIG);
}

int
print_insn_little_mips (bfd_vma memaddr, struct disassemble_info *info)
{
  return _print_insn_mips (memaddr, info, BFD_ENDIAN_LITTLE);
}

void
print_mips_disassembler_options (FILE *stream)
{
  unsigned int i;

  fprintf (stream, _("\n\
The following MIPS specific disassembler options are supported for use\n\
with the -M switch (multiple options should be separated by commas):\n"));

  fprintf (stream, _("\n\
  virt            Recognize the virtualization ASE instructions.\n"));

  fprintf (stream, _("\n\
  gpr-names=ABI            Print GPR names according to  specified ABI.\n\
                           Default: based on binary being disassembled.\n"));

  fprintf (stream, _("\n\
  fpr-names=ABI            Print FPR names according to specified ABI.\n\
                           Default: numeric.\n"));

  fprintf (stream, _("\n\
  cp0-names=ARCH           Print CP0 register names according to\n\
                           specified architecture.\n\
                           Default: based on binary being disassembled.\n"));

  fprintf (stream, _("\n\
  hwr-names=ARCH           Print HWR names according to specified \n\
			   architecture.\n\
                           Default: based on binary being disassembled.\n"));

  fprintf (stream, _("\n\
  reg-names=ABI            Print GPR and FPR names according to\n\
                           specified ABI.\n"));

  fprintf (stream, _("\n\
  reg-names=ARCH           Print CP0 register and HWR names according to\n\
                           specified architecture.\n"));

  fprintf (stream, _("\n\
  For the options above, the following values are supported for \"ABI\":\n\
   "));
  for (i = 0; i < ARRAY_SIZE (mips_abi_choices); i++)
    fprintf (stream, " %s", mips_abi_choices[i].name);
  fprintf (stream, _("\n"));

  fprintf (stream, _("\n\
  For the options above, The following values are supported for \"ARCH\":\n\
   "));
  for (i = 0; i < ARRAY_SIZE (mips_arch_choices); i++)
    if (*mips_arch_choices[i].name != '\0')
      fprintf (stream, " %s", mips_arch_choices[i].name);
  fprintf (stream, _("\n"));

  fprintf (stream, _("\n"));
}