[gdb/testsuite] Fix gdb.arch/amd64-disp-step-avx.exp on x86_64-freebsd

[thirdparty/binutils-gdb.git] / include / opcode / mips.h

/* mips.h.  Mips opcode list for GDB, the GNU debugger.
   Copyright (C) 1993-2025 Free Software Foundation, Inc.
   Contributed by Ralph Campbell and OSF
   Commented and modified by Ian Lance Taylor, Cygnus Support

   This file is part of GDB, GAS, and the GNU binutils.

   GDB, GAS, and the GNU binutils are free software; you can redistribute
   them and/or modify them 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.

   GDB, GAS, and the GNU binutils are distributed in the hope that they
   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 file; see the file COPYING3.  If not, write to the Free
   Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#ifndef _MIPS_H_
#define _MIPS_H_

#include "bfd.h"

#ifdef __cplusplus
extern "C" {
#endif

/* These are bit masks and shift counts to use to access the various
   fields of an instruction.  To retrieve the X field of an
   instruction, use the expression
	(i >> OP_SH_X) & OP_MASK_X
   To set the same field (to j), use
	i = (i &~ (OP_MASK_X << OP_SH_X)) | (j << OP_SH_X)

   Make sure you use fields that are appropriate for the instruction,
   of course.

   The 'i' format uses OP, RS, RT and IMMEDIATE.

   The 'j' format uses OP and TARGET.

   The 'r' format uses OP, RS, RT, RD, SHAMT and FUNCT.

   The 'b' format uses OP, RS, RT and DELTA.

   The floating point 'i' format uses OP, RS, RT and IMMEDIATE.

   The floating point 'r' format uses OP, FMT, FT, FS, FD and FUNCT.

   A breakpoint instruction uses OP, CODE and SPEC (10 bits of the
   breakpoint instruction are not defined; Kane says the breakpoint
   code field in BREAK is 20 bits; yet MIPS assemblers and debuggers
   only use ten bits).  An optional two-operand form of break/sdbbp
   allows the lower ten bits to be set too, and MIPS32 and later
   architectures allow 20 bits to be set with a single operand for
   the sdbbp instruction (using CODE20).

   The syscall instruction uses CODE20.

   The general coprocessor instructions use COPZ.  */

#define OP_MASK_OP		0x3f
#define OP_SH_OP		26
#define OP_MASK_RS		0x1f
#define OP_SH_RS		21
#define OP_MASK_BCC		0x7
#define OP_SH_BCC		18
#define OP_MASK_RT		0x1f
#define OP_SH_RT		16
#define OP_MASK_RD		0x1f
#define OP_SH_RD		11
#define OP_MASK_IMMEDIATE	0xffff
#define OP_SH_IMMEDIATE		0

/* Values in the 'VSEL' field.  */
#define MDMX_FMTSEL_IMM_QH	0x1d
#define MDMX_FMTSEL_IMM_OB	0x1e
#define MDMX_FMTSEL_VEC_QH	0x15
#define MDMX_FMTSEL_VEC_OB	0x16

/* Enumerates the various types of MIPS operand.  */
enum mips_operand_type {
  /* Described by mips_int_operand.  */
  OP_INT,

  /* Described by mips_mapped_int_operand.  */
  OP_MAPPED_INT,

  /* Described by mips_msb_operand.  */
  OP_MSB,

  /* Described by mips_reg_operand.  */
  OP_REG,

  /* Like OP_REG, but can be omitted if the register is the same as the
     previous operand.  */
  OP_OPTIONAL_REG,

  /* Described by mips_reg_pair_operand.  */
  OP_REG_PAIR,

  /* Described by mips_pcrel_operand.  */
  OP_PCREL,

  /* A performance register.  The field is 5 bits in size, but the supported
     values are much more restricted.  */
  OP_PERF_REG,

  /* The final operand in a microMIPS ADDIUSP instruction.  It mostly acts
     as a normal 9-bit signed offset that is multiplied by four, but there
     are four special cases:

     -2 * 4 => -258 * 4
     -1 * 4 => -257 * 4
      0 * 4 =>  256 * 4
      1 * 4 =>  257 * 4.  */
  OP_ADDIUSP_INT,

  /* The target of a (D)CLO or (D)CLZ instruction.  The operand spans two
     5-bit register fields, both of which must be set to the destination
     register.  */
  OP_CLO_CLZ_DEST,

  /* A register list for a microMIPS LWM or SWM instruction.  The operand
     size determines whether the 16-bit or 32-bit encoding is required.  */
  OP_LWM_SWM_LIST,

  /* The register list for an emulated MIPS16 ENTRY or EXIT instruction.  */
  OP_ENTRY_EXIT_LIST,

  /* The register list and frame size for a MIPS16 SAVE or RESTORE
     instruction.  */
  OP_SAVE_RESTORE_LIST,

  /* A 10-bit field VVVVVNNNNN used for octobyte and quadhalf instructions:

     V      Meaning
     -----  -------
     0EEE0  8 copies of $vN[E], OB format
     0EE01  4 copies of $vN[E], QH format
     10110  all 8 elements of $vN, OB format
     10101  all 4 elements of $vN, QH format
     11110  8 copies of immediate N, OB format
     11101  4 copies of immediate N, QH format.  */
  OP_MDMX_IMM_REG,

  /* A register operand that must match the destination register.  */
  OP_REPEAT_DEST_REG,

  /* A register operand that must match the previous register.  */
  OP_REPEAT_PREV_REG,

  /* $pc, which has no encoding in the architectural instruction.  */
  OP_PC,

  /* $28, which has no encoding in the MIPS16e architectural instruction.  */
  OP_REG28,

  /* A 4-bit XYZW channel mask or 2-bit XYZW index; the size determines
     which.  */
  OP_VU0_SUFFIX,

  /* Like OP_VU0_SUFFIX, but used when the operand's value has already
     been set.  Any suffix used here must match the previous value.  */
  OP_VU0_MATCH_SUFFIX,

  /* An index selected by an integer, e.g. [1].  */
  OP_IMM_INDEX,

  /* An index selected by a register, e.g. [$2].  */
  OP_REG_INDEX,

  /* The operand spans two 5-bit register fields, both of which must be set to
     the source register.  */
  OP_SAME_RS_RT,

  /* Described by mips_prev_operand.  */
  OP_CHECK_PREV,

  /* A register operand that must not be zero.  */
  OP_NON_ZERO_REG
};

/* Enumerates the types of MIPS register.  */
enum mips_reg_operand_type {
  /* General registers $0-$31.  Software names like $at can also be used.  */
  OP_REG_GP,

  /* Floating-point registers $f0-$f31.  */
  OP_REG_FP,

  /* Coprocessor condition code registers $cc0-$cc7.  FPU condition codes
     can also be written $fcc0-$fcc7.  */
  OP_REG_CCC,

  /* FPRs used in a vector capacity.  They can be written $f0-$f31
     or $v0-$v31, although the latter form is not used for the VR5400
     vector instructions.  */
  OP_REG_VEC,

  /* DSP accumulator registers $ac0-$ac3.  */
  OP_REG_ACC,

  /* Coprocessor registers $0-$31.  Mnemonic names like c0_cause can
     also be used in some contexts.  */
  OP_REG_COPRO,

  /* Coprocessor control registers $0-$31.  Mnemonic names like c1_fcsr can
     also be used in some contexts.  */
  OP_REG_CONTROL,

  /* Hardware registers $0-$31.  Mnemonic names like hwr_cpunum can
     also be used in some contexts.  */
  OP_REG_HW,

  /* Floating-point registers $vf0-$vf31.  */
  OP_REG_VF,

  /* Integer registers $vi0-$vi31.  */
  OP_REG_VI,

  /* R5900 VU0 registers $I, $Q, $R and $ACC.  */
  OP_REG_R5900_I,
  OP_REG_R5900_Q,
  OP_REG_R5900_R,
  OP_REG_R5900_ACC,

  /* MSA registers $w0-$w31.  */
  OP_REG_MSA,

  /* MSA control registers $0-$31.  */
  OP_REG_MSA_CTRL
};

/* Base class for all operands.  */
struct mips_operand
{
  /* The type of the operand.  */
  enum mips_operand_type type;

  /* The operand occupies SIZE bits of the instruction, starting at LSB.  */
  unsigned short size;
  unsigned short lsb;
};

/* Describes an integer operand with a regular encoding pattern.  */
struct mips_int_operand
{
  struct mips_operand root;

  /* The low ROOT.SIZE bits of MAX_VAL encodes (MAX_VAL + BIAS) << SHIFT.
     The cyclically previous field value encodes 1 << SHIFT less than that,
     and so on.  E.g.

     - for { { T, 4, L }, 14, 0, 0 }, field values 0...14 encode themselves,
       but 15 encodes -1.

     - { { T, 8, L }, 127, 0, 2 } is a normal signed 8-bit operand that is
       shifted left two places.

     - { { T, 3, L }, 8, 0, 0 } is a normal unsigned 3-bit operand except
       that 0 encodes 8.

     - { { ... }, 0, 1, 3 } means that N encodes (N + 1) << 3.  */
  unsigned int max_val;
  int bias;
  unsigned int shift;

  /* True if the operand should be printed as hex rather than decimal.  */
  bool print_hex;
};

/* Uses a lookup table to describe a small integer operand.  */
struct mips_mapped_int_operand
{
  struct mips_operand root;

  /* Maps each encoding value to the integer that it represents.  */
  const int *int_map;

  /* True if the operand should be printed as hex rather than decimal.  */
  bool print_hex;
};

/* An operand that encodes the most significant bit position of a bitfield.
   Given a bitfield that spans bits [MSB, LSB], some operands of this type
   encode MSB directly while others encode MSB - LSB.  Each operand of this
   type is preceded by an integer operand that specifies LSB.

   The assembly form varies between instructions.  For some instructions,
   such as EXT, the operand is written as the bitfield size.  For others,
   such as EXTS, it is written in raw MSB - LSB form.  */
struct mips_msb_operand
{
  struct mips_operand root;

  /* The assembly-level operand encoded by a field value of 0.  */
  int bias;

  /* True if the operand encodes MSB directly, false if it encodes
     MSB - LSB.  */
  bool add_lsb;

  /* The maximum value of MSB + 1.  */
  unsigned int opsize;
};

/* Describes a single register operand.  */
struct mips_reg_operand
{
  struct mips_operand root;

  /* The type of register.  */
  enum mips_reg_operand_type reg_type;

  /* If nonnull, REG_MAP[N] gives the register associated with encoding N,
     otherwise the encoding is the same as the register number.  */
  const unsigned char *reg_map;
};

/* Describes an operand that which must match a condition based on the
   previous operand.  */
struct mips_check_prev_operand
{
  struct mips_operand root;

  bool greater_than_ok;
  bool less_than_ok;
  bool equal_ok;
  bool zero_ok;
};

/* Describes an operand that encodes a pair of registers.  */
struct mips_reg_pair_operand
{
  struct mips_operand root;

  /* The type of register.  */
  enum mips_reg_operand_type reg_type;

  /* Encoding N represents REG1_MAP[N], REG2_MAP[N].  */
  unsigned char *reg1_map;
  unsigned char *reg2_map;
};

/* Describes an operand that is calculated relative to a base PC.
   The base PC is usually the address of the following instruction,
   but the rules for MIPS16 instructions like ADDIUPC are more complicated.  */
struct mips_pcrel_operand
{
  /* Encodes the offset.  */
  struct mips_int_operand root;

  /* The low ALIGN_LOG2 bits of the base PC are cleared to give PC',
     which is then added to the offset encoded by ROOT.  */
  unsigned int align_log2 : 8;

  /* If INCLUDE_ISA_BIT, the ISA bit of the original base PC is then
     reinstated.  This is true for jumps and branches and false for
     PC-relative data instructions.  */
  unsigned int include_isa_bit : 1;

  /* If FLIP_ISA_BIT, the ISA bit of the result is inverted.
     This is true for JALX and false otherwise.  */
  unsigned int flip_isa_bit : 1;
};

/* Return true if the assembly syntax allows OPERAND to be omitted.  */

static inline bool
mips_optional_operand_p (const struct mips_operand *operand)
{
  return (operand->type == OP_OPTIONAL_REG
	  || operand->type == OP_REPEAT_PREV_REG);
}

/* Return a version of INSN in which the field specified by OPERAND
   has value UVAL.  */

static inline unsigned int
mips_insert_operand (const struct mips_operand *operand, unsigned int insn,
		     unsigned int uval)
{
  unsigned int mask;

  mask = (1 << operand->size) - 1;
  insn &= ~(mask << operand->lsb);
  insn |= (uval & mask) << operand->lsb;
  return insn;
}

/* Extract OPERAND from instruction INSN.  */

static inline unsigned int
mips_extract_operand (const struct mips_operand *operand, unsigned int insn)
{
  return (insn >> operand->lsb) & ((1 << operand->size) - 1);
}

/* UVAL is the value encoded by OPERAND.  Return it in signed form.  */

static inline int
mips_signed_operand (const struct mips_operand *operand, unsigned int uval)
{
  unsigned int sign_bit, mask;

  mask = (1 << operand->size) - 1;
  sign_bit = 1 << (operand->size - 1);
  return ((uval + sign_bit) & mask) - sign_bit;
}

/* Return the integer that OPERAND encodes as UVAL.  */

static inline int
mips_decode_int_operand (const struct mips_int_operand *operand,
			 unsigned int uval)
{
  uval |= (operand->max_val - uval) & -(1 << operand->root.size);
  uval += operand->bias;
  uval <<= operand->shift;
  return uval;
}

/* Return the maximum value that can be encoded by OPERAND.  */

static inline int
mips_int_operand_max (const struct mips_int_operand *operand)
{
  return (operand->max_val + operand->bias) << operand->shift;
}

/* Return the minimum value that can be encoded by OPERAND.  */

static inline int
mips_int_operand_min (const struct mips_int_operand *operand)
{
  unsigned int mask;

  mask = (1 << operand->root.size) - 1;
  return mips_int_operand_max (operand) - (mask << operand->shift);
}

/* Return the register that OPERAND encodes as UVAL.  */

static inline int
mips_decode_reg_operand (const struct mips_reg_operand *operand,
			 unsigned int uval)
{
  if (operand->reg_map)
    uval = operand->reg_map[uval];
  return uval;
}

/* PC-relative operand OPERAND has value UVAL and is relative to BASE_PC.
   Return the address that it encodes.  */

static inline bfd_vma
mips_decode_pcrel_operand (const struct mips_pcrel_operand *operand,
			   bfd_vma base_pc, unsigned int uval)
{
  bfd_vma addr;

  addr = base_pc & -(1 << operand->align_log2);
  addr += mips_decode_int_operand (&operand->root, uval);
  if (operand->include_isa_bit)
    addr |= base_pc & 1;
  if (operand->flip_isa_bit)
    addr ^= 1;
  return addr;
}

/* This structure holds information for a particular instruction.  */

struct mips_opcode
{
  /* The name of the instruction.  */
  const char *name;
  /* A string describing the arguments for this instruction.  */
  const char *args;
  /* The basic opcode for the instruction.  When assembling, this
     opcode is modified by the arguments to produce the actual opcode
     that is used.  If pinfo is INSN_MACRO, then this is 0.  */
  unsigned long match;
  /* If pinfo is not INSN_MACRO, then this is a bit mask for the
     relevant portions of the opcode when disassembling.  If the
     actual opcode anded with the match field equals the opcode field,
     then we have found the correct instruction.  If pinfo is
     INSN_MACRO, then this field is the macro identifier.  */
  unsigned long mask;
  /* For a macro, this is INSN_MACRO.  Otherwise, it is a collection
     of bits describing the instruction, notably any relevant hazard
     information.  */
  unsigned long pinfo;
  /* A collection of additional bits describing the instruction. */
  unsigned long pinfo2;
  /* A collection of bits describing the instruction sets of which this
     instruction or macro is a member. */
  unsigned long membership;
  /* A collection of bits describing the ASE of which this instruction
     or macro is a member.  */
  unsigned long ase;
  /* A collection of bits describing the instruction sets of which this
     instruction or macro is not a member.  */
  unsigned long exclusions;
};

/* Return true if MO is an instruction that requires 32-bit encoding.  */

static inline bool
mips_opcode_32bit_p (const struct mips_opcode *mo)
{
  return mo->mask >> 16 != 0;
}

/* These are the characters which may appear in the args field of a
   regular MIPS instruction.  They appear in the order in which the fields
   appear when the instruction is used.  Commas and parentheses in the
   args string are ignored when assembling, and written into the output
   when disassembling.

   "1" 5-bit SYNC type at bit 6.
   "<" 5-bit shift amount at bit 6 (SHAMT).
   ">" Shift amount between 32 and 63, stored after subtracting 32, at bit 6
       (SHAMT).
   "a" 26-bit target address at bit 0 (TARGET).
   "+i" Likewise, but flips bit 0.
   "b" 5-bit base register at bit 21 (RS).
   "c" 10-bit breakpoint code at bit 16.
   "d" 5-bit destination register at bit 11 (RD).
   "h" 5-bit PREFX hint at bit 11.
   "i" 16-bit unsigned immediate at bit 0 (IMMEDIATE).
   "j" 16-bit signed immediate at bit 0 (DELTA).
   "k" 5-bit CACHE opcode in target register position at bit 16.
   "o" 16-bit signed offset at bit 0 (DELTA).
   "p" 16-bit PC relative branch target address at bit 0 (DELTA).
   "q" 10-bit extra breakpoint code at bit 6.
   "r" 5-bit same register used as both source and target at bit 21 (RS).
   "s" 5-bit source register at bit 21 (RS).
   "t" 5-bit target register at bit 16 (RT).
   "u" 16-bit upper 16 bits of address at bit 0 (IMMEDIATE).
   "v" 5-bit same register used as both source and destination at bit 21 (RS).
   "w" 5-bit same register used as both target and destination at bit 16 (RT).
   "U" 5-bit same destination register at both bit 11 and 16 (both RD and RT)
       (used by CLO and CLZ).
   "C" 25-bit coprocessor function code at bit 0.
   "B" 20-bit syscall/breakpoint function code at bit 6.
   "J" 19-bit WAIT function code at bit 6.
   "x" Accept and ignore register name.
   "z" Must be zero register.
   "K" 5-bit Hardware Register (RDHWR instruction) at bit 11 (RD).
   "+A" 5-bit INS/EXT/DINS/DEXT/DINSM/DEXTM position at bit 6,
	which becomes LSB (SHAMT).
	Enforces: 0 <= pos < 32.
   "+B" 5-bit INS/DINS size at bit 11, which becomes MSB.
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 0 < (pos+size) <= 32.
   "+C" 5-bit EXT/DEXT size at bit 11, which becomes MSBD.
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 0 < (pos+size) <= 32.
	(Also used by DEXT w/ different limits, but limits for
	that are checked by the M_DEXT macro.)
   "+E" 5-bit DINSU/DEXTU position at bit 6, which becomes LSB-32 (SHAMT).
	Enforces: 32 <= pos < 64.
   "+F" 5-bit DINSM/DINSU size at bit 11, which becomes MSB-32.
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 32 < (pos+size) <= 64.
   "+G" 5-bit DEXTM size at bit 11, which becomes MSBD-32.
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 32 < (pos+size) <= 64.
   "+H" 5-bit DEXTU size at bit 11, which becomes MSBD.
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 32 < (pos+size) <= 64.

   Floating point instructions:
   "D" 5-bit destination register at bit 6 (FD).
   "M" 3-bit compare condition code at bit 8 (only used for mips4 and up).
   "N" 3-bit branch condition code at bit 18 (only used for mips4 and up).
   "S" 5-bit fs source 1 register at bit 11 (FS).
   "T" 5-bit ft source 2 register at bit 16 (FT).
   "R" 5-bit fr source 3 register at bit 21 (FR).
   "V" 5-bit same register used as floating source and destination at bit 11
       (FS).
   "W" 5-bit same register used as floating target and destination at bit 16
       (FT).

   Coprocessor instructions:
   "E" 5-bit target register at bit 16 (RT).
   "G" 5-bit destination register at bit 11 (RD).
   "H" 3-bit sel field for (D)MTC* and (D)MFC* at bit 0.
   "P" 5-bit performance-monitor register at bit 1.
   "e" 3-bit vector register byte specifier at bit 22.
   "g" 5-bit control destination register at bit 11 (RD).
   "%" 3-bit immediate vr5400 vector alignment operand at bit 21.

   Macro instructions:
   "A" General 32-bit expression.
   "I" 32-bit immediate (value placed in imm_expr).
   "F" 64-bit floating point constant in .rdata.
   "L" 64-bit floating point constant in .lit8.
   "f" 32-bit floating point constant.
   "l" 32-bit floating point constant in .lit4.

   MDMX and VR5400 instruction operands (note that while these use the
   FP register fields, the MDMX instructions accept both $fN and $vN names
   for the registers):
   "O" 3-bit alignment offset at bit 21.
   "Q" 10-bit vector/scalar/immediate source at bit 16.
   "X" 5-bit destination register at bit 6 (FD).
   "Y" 5-bit source register at bit 11 (FS).
   "Z" 5-bit source register at bit 16 (FT).

   R5900 VU0 Macromode instructions:
   "+5" 5-bit floating point register at bit 6 (FD).
   "+6" 5-bit floating point register at bit 11 (FS).
   "+7" 5-bit floating point register at bit 16 (FT).
   "+8" 5-bit integer register at bit 6 (FD).
   "+9" 5-bit integer register at bit 11 (FS).
   "+0" 5-bit integer register at bit 16 (FT).
   "+K" Match an existing 4-bit channel mask starting at bit 21.
   "+L" 2-bit channel index starting at bit 21.
   "+M" 2-bit channel index starting at bit 23.
   "+N" Match an existing 2-bit channel index starting at bit 0.
   "+f" 15-bit immediate for VCALLMS at bit 6.
   "+g" 5-bit signed immediate for VIADDI at bit 6.
   "+m" $ACC register (syntax only).
   "+q" $Q register (syntax only).
   "+r" $R register (syntax only).
   "+y" $I register (syntax only).
   "#+" "++" decorator in ($reg++) sequence.
   "#-" "--" decorator in (--$reg) sequence.

   DSP ASE usage:
   "2" 2-bit unsigned immediate for byte align at bit 11.
   "3" 3-bit unsigned immediate at bit 21.
   "4" 4-bit unsigned immediate at bit 21.
   "5" 8-bit unsigned immediate at bit 16.
   "6" 5-bit unsigned immediate at bit 21 (RS).
   "7" 2-bit DSP accumulator register at bit 11.
   "8" 6-bit unsigned immediate at bit 11.
   "9" 2-bit DSP accumulator register at bit 21.
   "0" 6-bit signed immediate at bit 20.
   ":" 7-bit signed immediate at bit 19.
   "'" 6-bit unsigned immediate at bit 16.
   "@" 10-bit signed immediate at bit 16.

   MT ASE usage:
   "!" 1-bit usermode flag at bit 5.
   "$" 1-bit load high flag at bit 4.
   "*" 2-bit DSP/SmartMIPS accumulator register at bit 18.
   "&" 2-bit DSP/SmartMIPS accumulator register at bit 13.
   "y" 5-bit control target register at bit 16 (RT).

   MCU ASE usage:
   "~" 12-bit offset at bit 0.
   "\" 3-bit position for ASET and ACLR at bit 12.

   VIRT ASE usage:
   "+J" 10-bit HYPCALL code at bit 11.

   UDI immediates:
   "+1" UDI immediate bits 6-10.
   "+2" UDI immediate bits 6-15.
   "+3" UDI immediate bits 6-20.
   "+4" UDI immediate bits 6-25.

   Octeon:
   "+x" Bit index field of BBITx at bit 16.
	Enforces: 0 <= index < 32.
   "+X" Bit index field of BBITx aliasing BBITx32 at bit 16.
	Matches if 32 <= index < 64, otherwise skips to next candidate.
   "+p" Position field of CINS/CINS32/EXTS/EXTS32 at bit 6.
	Enforces 0 <= pos < 32.
   "+P" Position field of CINS/EXTS aliasing CINS32/EXTS32 at bit 6.
	Matches if 32 <= pos < 64, otherwise skips to next candidate.
   "+Q" Immediate field of SEQI/SNEI at bit 6.
	Enforces -512 <= imm < 512.
   "+s" Length-minus-one field of CINS32/EXTS32 at bit 11.
	Requires MSB position of the field to be <= 31.
   "+S" Length-minus-one field of CINS/EXTS at bit 11.
	Requires MSB position of the field to be <= 63.

   Loongson-ext ASE:
   "+a" 8-bit signed offset at bit 6.
   "+b" 8-bit signed offset at bit 3.
   "+c" 9-bit signed offset at bit 6.
   "+z" 5-bit rz register at bit 0.
   "+Z" 5-bit fz register at bit 0.

   interAptiv MR2:
   "-m" Register list for SAVE/RESTORE instruction.

   Enhanced VA Scheme:
   "+j" 9-bit signed offset at bit 7.

   MSA Extension:
   "+d" 5-bit MSA register at bit 6 (FD).
   "+e" 5-bit MSA register at bit 11 (FS).
   "+h" 5-bit MSA register at bit 16 (FT).
   "+k" 5-bit GPR at bit 6.
   "+l" 5-bit MSA control register at bit 6.
   "+n" 5-bit MSA control register at bit 11.
   "+o" 4-bit vector element index at bit 16.
   "+u" 3-bit vector element index at bit 16.
   "+v" 2-bit vector element index at bit 16.
   "+w" 1-bit vector element index at bit 16.
   "+T" (-512 .. 511) << 0 at bit 16.
   "+U" (-512 .. 511) << 1 at bit 16.
   "+V" (-512 .. 511) << 2 at bit 16.
   "+W" (-512 .. 511) << 3 at bit 16.
   "+~" 2-bit LSA/DLSA shift amount from 1 to 4 at bit 6.
   "+!" 3-bit unsigned bit position at bit 16.
   "+@" 4-bit unsigned bit position at bit 16.
   "+#" 6-bit unsigned bit position at bit 16.
   "+$" 5-bit unsigned immediate at bit 16.
   "+%" 5-bit signed immediate at bit 16.
   "+^" 10-bit signed immediate at bit 11.
   "+&" 0 vector element index.
   "+*" 5-bit register vector element index at bit 16.
   "+|" 8-bit mask at bit 16.

   MIPS R6:
   "+:" 11-bit mask at bit 0.
   "+'" 26-bit PC relative branch target address at bit 0.
   "+"" 21-bit PC relative branch target address at bit 0.
   "+;" 5-bit same register at both bit 16 and 21 (both RT and RS).
   "+I" 2-bit unsigned bit position at bit 6.
   "+O" 3-bit unsigned bit position at bit 6.
   "+R" Must be program counter.
   "-a" (-262144 .. 262143) << 2 at bit 0.
   "-b" (-131072 .. 131071) << 3 at bit 0.
   "-d" Same as destination register GP.
   "-s" 5-bit source register at bit 21 (RS) not $0.
   "-t" 5-bit target register at bit 16 (RT) not $0
   "-u" 5-bit target register at bit 16 (RT) greater than RS.
   "-v" 5-bit target register at bit 16 (RT) not $0 not RS.
   "-w" 5-bit target register at bit 16 (RT) less than or equal to RS.
   "-x" 5-bit source register at bit 21 (RS) greater than RT.
   "-y" 5-bit source register at bit 21 (RS) not $0 less than RT.
   "-A" Symbolic offset (-262144 .. 262143) << 2 at bit 0.
   "-B" Symbolic offset (-131072 .. 131071) << 3 at bit 0.

   GINV ASE usage:
   "+\" 2-bit Global TLB invalidate type at bit 8.

   Other:
   "()" Parens surrounding optional value.
   ","  Separates operands.
   "+"  Start of extension sequence.
   "-"  Start of extension sequence.

   Characters used so far, for quick reference when adding more:
   "1234567890"
   "%[]<>(),+-:'@!#$*&\~"
   "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
   "abcdef hijkl  opqrstuvwxyz"

   Extension character sequences used so far ("+" followed by the
   following), for quick reference when adding more:
   "1234567890"
   "~!@#$%^&*|:'";\"
   "ABC EFGHIJKLMNOPQRSTUVWX Z"
   "abcdefghijklmnopqrs uvwxyz"

   Extension character sequences used so far ("-" followed by the
   following), for quick reference when adding more:
   "AB                        "
   "ab d        m     stuvwxy "
*/

/* These are the bits which may be set in the pinfo field of an
   instructions, if it is not equal to INSN_MACRO.  */

/* Writes to operand number N.  */
#define INSN_WRITE_SHIFT            0
#define INSN_WRITE_1                0x00000001
#define INSN_WRITE_2                0x00000002
#define INSN_WRITE_ALL              0x00000003
/* Reads from operand number N.  */
#define INSN_READ_SHIFT             2
#define INSN_READ_1                 0x00000004
#define INSN_READ_2                 0x00000008
#define INSN_READ_3                 0x00000010
#define INSN_READ_4                 0x00000020
#define INSN_READ_ALL               0x0000003c
/* Modifies general purpose register 31.  */
#define INSN_WRITE_GPR_31           0x00000040
/* Modifies coprocessor condition code.  */
#define INSN_WRITE_COND_CODE        0x00000080
/* Reads coprocessor condition code.  */
#define INSN_READ_COND_CODE         0x00000100
/* TLB operation.  */
#define INSN_TLB                    0x00000200
/* Reads coprocessor register other than floating point register.  */
#define INSN_COP                    0x00000400
/* Instruction loads value from memory.  */
#define INSN_LOAD_MEMORY	    0x00000800
/* Instruction loads value from coprocessor, (may require delay).  */
#define INSN_LOAD_COPROC	    0x00001000
/* Instruction has unconditional branch delay slot.  */
#define INSN_UNCOND_BRANCH_DELAY    0x00002000
/* Instruction has conditional branch delay slot.  */
#define INSN_COND_BRANCH_DELAY      0x00004000
/* Conditional branch likely: if branch not taken, insn nullified.  */
#define INSN_COND_BRANCH_LIKELY	    0x00008000
/* Moves to coprocessor register, (may require delay).  */
#define INSN_COPROC_MOVE            0x00010000
/* Loads coprocessor register from memory, requiring delay.  */
#define INSN_COPROC_MEMORY_DELAY    0x00020000
/* Reads the HI register.  */
#define INSN_READ_HI		    0x00040000
/* Reads the LO register.  */
#define INSN_READ_LO		    0x00080000
/* Modifies the HI register.  */
#define INSN_WRITE_HI		    0x00100000
/* Modifies the LO register.  */
#define INSN_WRITE_LO		    0x00200000
/* Not to be placed in a branch delay slot, either architecturally
   or for ease of handling (such as with instructions that take a trap).  */
#define INSN_NO_DELAY_SLOT	    0x00400000
/* Instruction stores value into memory.  */
#define INSN_STORE_MEMORY	    0x00800000
/* Instruction uses single precision floating point.  */
#define FP_S			    0x01000000
/* Instruction uses double precision floating point.  */
#define FP_D			    0x02000000
/* Instruction is part of the tx39's integer multiply family.    */
#define INSN_MULT                   0x04000000
/* Reads general purpose register 24.  */
#define INSN_READ_GPR_24            0x08000000
/* Writes to general purpose register 24.  */
#define INSN_WRITE_GPR_24           0x10000000
/* A user-defined instruction.  */
#define INSN_UDI                    0x20000000
/* Instruction is actually a macro.  It should be ignored by the
   disassembler, and requires special treatment by the assembler.  */
#define INSN_MACRO                  0xffffffff

/* These are the bits which may be set in the pinfo2 field of an
   instruction. */

/* Instruction is a simple alias (I.E. "move" for daddu/addu/or) */
#define	INSN2_ALIAS		    0x00000001
/* Instruction reads MDMX accumulator. */
#define INSN2_READ_MDMX_ACC	    0x00000002
/* Instruction writes MDMX accumulator. */
#define INSN2_WRITE_MDMX_ACC	    0x00000004
/* Macro uses single-precision floating-point instructions.  This should
   only be set for macros.  For instructions, FP_S in pinfo carries the
   same information.  */
#define INSN2_M_FP_S		    0x00000008
/* Macro uses double-precision floating-point instructions.  This should
   only be set for macros.  For instructions, FP_D in pinfo carries the
   same information.  */
#define INSN2_M_FP_D		    0x00000010
/* Instruction has a branch delay slot that requires a 16-bit instruction.  */
#define INSN2_BRANCH_DELAY_16BIT    0x00000020
/* Instruction has a branch delay slot that requires a 32-bit instruction.  */
#define INSN2_BRANCH_DELAY_32BIT    0x00000040
/* Writes to the stack pointer ($29).  */
#define INSN2_WRITE_SP		    0x00000080
/* Reads from the stack pointer ($29).  */
#define INSN2_READ_SP		    0x00000100
/* Reads the RA ($31) register.  */
#define INSN2_READ_GPR_31	    0x00000200
/* Reads the program counter ($pc).  */
#define INSN2_READ_PC		    0x00000400
/* Is an unconditional branch insn. */
#define INSN2_UNCOND_BRANCH	    0x00000800
/* Is a conditional branch insn. */
#define INSN2_COND_BRANCH	    0x00001000
/* Reads from $16.  This is true of the MIPS16 0x6500 nop.  */
#define INSN2_READ_GPR_16           0x00002000
/* Has an "\.x?y?z?w?" suffix based on mips_vu0_channel_mask.  */
#define INSN2_VU0_CHANNEL_SUFFIX    0x00004000
/* Instruction has a forbidden slot.  */
#define INSN2_FORBIDDEN_SLOT        0x00008000
/* Opcode table entry is for a short MIPS16 form only.  An extended
   encoding may still exist, but with a separate opcode table entry
   required.  In disassembly the presence of this flag in an otherwise
   successful match against an extended instruction encoding inhibits
   matching against any subsequent short table entry even if it does
   not have this flag set.  A table entry matching the full extended
   encoding is needed or otherwise the final EXTEND entry will apply,
   for the disassembly of the prefix only.  */
#define INSN2_SHORT_ONLY	    0x00010000

/* Masks used to mark instructions to indicate which MIPS ISA level
   they were introduced in.  INSN_ISA_MASK masks an enumeration that
   specifies the base ISA level(s).  The remainder of a 32-bit
   word constructed using these macros is a bitmask of the remaining
   INSN_* values below, as indicated by INSN_CHIP_MASK.  */

#define INSN_ISA_MASK		  0x0000001ful

/* We cannot start at zero due to ISA_UNKNOWN below.  */
#define INSN_ISA1                 1
#define INSN_ISA2                 2
#define INSN_ISA3                 3
#define INSN_ISA4                 4
#define INSN_ISA5                 5
#define INSN_ISA32                6
#define INSN_ISA32R2              7
#define INSN_ISA32R3              8
#define INSN_ISA32R5              9
#define INSN_ISA32R6              10
#define INSN_ISA64                11 
#define INSN_ISA64R2              12
#define INSN_ISA64R3              13
#define INSN_ISA64R5              14
#define INSN_ISA64R6              15
/* Below this point the INSN_* values correspond to combinations of ISAs.
   They are only for use in the opcodes table to indicate membership of
   a combination of ISAs that cannot be expressed using the usual inclusion
   ordering on the above INSN_* values.  */
#define INSN_ISA3_32              16
#define INSN_ISA3_32R2            17
#define INSN_ISA4_32              18
#define INSN_ISA4_32R2            19
#define INSN_ISA5_32R2            20

/* The R6 definitions shown below state that they support all previous ISAs.
   This is not actually true as some instructions are removed in R6.
   The problem is that the removed instructions in R6 come from different
   ISAs.  One approach to solve this would be to describe in the membership
   field of the opcode table the different ISAs an instruction belongs to.
   This would require us to create a large amount of different ISA
   combinations which is hard to manage.  A cleaner approach (which is
   implemented here) is to say that R6 is an extension of R5 and then to
   deal with the removed instructions by adding instruction exclusions
   for R6 in the opcode table.  */

/* Bit INSN_ISA<X> - 1 of INSN_UPTO<Y> is set if ISA Y includes ISA X.  */

#define ISAF(X) (1 << (INSN_ISA##X - 1))
#define INSN_UPTO1    ISAF(1)
#define INSN_UPTO2    INSN_UPTO1 | ISAF(2)
#define INSN_UPTO3    INSN_UPTO2 | ISAF(3) | ISAF(3_32) | ISAF(3_32R2)
#define INSN_UPTO4    INSN_UPTO3 | ISAF(4) | ISAF(4_32) | ISAF(4_32R2)
#define INSN_UPTO5    INSN_UPTO4 | ISAF(5) | ISAF(5_32R2)
#define INSN_UPTO32   INSN_UPTO2 | ISAF(32) | ISAF(3_32) | ISAF(4_32)
#define INSN_UPTO32R2 INSN_UPTO32 | ISAF(32R2) \
			| ISAF(3_32R2) | ISAF(4_32R2) | ISAF(5_32R2)
#define INSN_UPTO32R3 INSN_UPTO32R2 | ISAF(32R3)
#define INSN_UPTO32R5 INSN_UPTO32R3 | ISAF(32R5)
#define INSN_UPTO32R6 INSN_UPTO32R5 | ISAF(32R6)
#define INSN_UPTO64   INSN_UPTO5 | ISAF(64) | ISAF(32)
#define INSN_UPTO64R2 INSN_UPTO64 | ISAF(64R2) | ISAF(32R2)
#define INSN_UPTO64R3 INSN_UPTO64R2 | ISAF(64R3) | ISAF(32R3)
#define INSN_UPTO64R5 INSN_UPTO64R3 | ISAF(64R5) | ISAF(32R5)
#define INSN_UPTO64R6 INSN_UPTO64R5 | ISAF(64R6) | ISAF(32R6)

/* The same information in table form: bit INSN_ISA<X> - 1 of index
   INSN_UPTO<Y> - 1 is set if ISA Y includes ISA X.  */
static const unsigned int mips_isa_table[] = {
  INSN_UPTO1,
  INSN_UPTO2,
  INSN_UPTO3,
  INSN_UPTO4,
  INSN_UPTO5,
  INSN_UPTO32,
  INSN_UPTO32R2,
  INSN_UPTO32R3,
  INSN_UPTO32R5,
  INSN_UPTO32R6,
  INSN_UPTO64,
  INSN_UPTO64R2,
  INSN_UPTO64R3,
  INSN_UPTO64R5,
  INSN_UPTO64R6
};
#undef ISAF

/* Masks used for Chip specific instructions.  */
#define INSN_CHIP_MASK		0x01ffffe0

/* MIPS R4650 instruction.  */
#define INSN_4650		0x00000020
/* LSI R4010 instruction.  */
#define INSN_4010		0x00000040
/* NEC VR4100 instruction.  */
#define INSN_4100		0x00000080
/* Toshiba R3900 instruction.  */
#define INSN_3900		0x00000100
/* MIPS R10000 instruction.  */
#define INSN_10000		0x00000200
/* Broadcom SB-1 instruction.  */
#define INSN_SB1		0x00000400
/* NEC VR4111/VR4181 instruction.  */
#define INSN_4111		0x00000800
/* NEC VR4120 instruction.  */
#define INSN_4120		0x00001000
/* NEC VR5400 instruction.  */
#define INSN_5400		0x00002000
/* NEC VR5500 instruction.  */
#define INSN_5500		0x00004000
/* MIPS R5900 instruction.  */
#define INSN_5900		0x00008000
/* ST Microelectronics Loongson 2E.  */
#define INSN_LOONGSON_2E	0x00010000
/* ST Microelectronics Loongson 2F.  */
#define INSN_LOONGSON_2F	0x00020000
/* Cavium Networks Octeon instructions.  */
#define INSN_OCTEON		0x00040000
#define INSN_OCTEONP		0x00080000
#define INSN_OCTEON2		0x00100000
#define INSN_OCTEON3		0x00200000
/* RMI XLR instruction.  */
#define INSN_XLR		0x00400000
/* Imagination interAptiv MR2.  */
#define INSN_INTERAPTIV_MR2	0x00800000
/* Sony PSP Allegrex instruction.  */
#define INSN_ALLEGREX		0x01000000

/* DSP ASE */
#define ASE_DSP			0x00000001
#define ASE_DSP64		0x00000002
/* DSP R2 ASE  */
#define ASE_DSPR2		0x00000004
/* Enhanced VA Scheme */
#define ASE_EVA			0x00000008
/* MCU (MicroController) ASE */
#define ASE_MCU			0x00000010
/* MDMX ASE */
#define ASE_MDMX		0x00000020
/* MIPS-3D ASE */
#define ASE_MIPS3D		0x00000040
/* MT ASE */
#define ASE_MT			0x00000080
/* SmartMIPS ASE  */
#define ASE_SMARTMIPS		0x00000100
/* Virtualization ASE */
#define ASE_VIRT		0x00000200
#define ASE_VIRT64		0x00000400
/* MSA Extension  */
#define ASE_MSA			0x00000800
#define ASE_MSA64		0x00001000
/* eXtended Physical Address (XPA) Extension.  */
#define ASE_XPA			0x00002000
/* DSP R3 Module.  */
#define ASE_DSPR3		0x00004000
/* MIPS16e2 ASE.  */
#define ASE_MIPS16E2		0x00008000
/* MIPS16e2 MT ASE instructions.  */
#define ASE_MIPS16E2_MT		0x00010000
/* The Virtualization ASE has eXtended Physical Addressing (XPA)
   instructions which are only valid when both ASEs are enabled.  */
#define ASE_XPA_VIRT		0x00020000
/* Cyclic redundancy check (CRC) ASE.  */
#define ASE_CRC			0x00040000
#define ASE_CRC64		0x00080000
/* Global INValidate Extension.  */
#define ASE_GINV		0x00100000
/* Loongson MultiMedia extensions Instructions (MMI).  */
#define ASE_LOONGSON_MMI	0x00200000
/* Loongson Content Address Memory (CAM).  */
#define ASE_LOONGSON_CAM	0x00400000
/* Loongson EXTensions (EXT) instructions.  */
#define ASE_LOONGSON_EXT	0x00800000
/* Loongson EXTensions R2 (EXT2) instructions.  */
#define ASE_LOONGSON_EXT2	0x01000000
/* The Enhanced VA Scheme (EVA) extension has instructions which are
   only valid for the R6 ISA.  */
#define ASE_EVA_R6		0x02000000

/* MIPS ISA defines, use instead of hardcoding ISA level.  */

#define       ISA_UNKNOWN     0               /* Gas internal use.  */
#define       ISA_MIPS1       INSN_ISA1
#define       ISA_MIPS2       INSN_ISA2
#define       ISA_MIPS3       INSN_ISA3
#define       ISA_MIPS4       INSN_ISA4
#define       ISA_MIPS5       INSN_ISA5

#define       ISA_MIPS32      INSN_ISA32
#define       ISA_MIPS64      INSN_ISA64

#define       ISA_MIPS32R2    INSN_ISA32R2
#define       ISA_MIPS32R3    INSN_ISA32R3
#define       ISA_MIPS32R5    INSN_ISA32R5
#define       ISA_MIPS64R2    INSN_ISA64R2
#define       ISA_MIPS64R3    INSN_ISA64R3
#define       ISA_MIPS64R5    INSN_ISA64R5

#define       ISA_MIPS32R6    INSN_ISA32R6
#define       ISA_MIPS64R6    INSN_ISA64R6

/* CPU defines, use instead of hardcoding processor number. Keep this
   in sync with bfd/archures.c in order for machine selection to work.  */
#define CPU_UNKNOWN	0               /* Gas internal use.  */
#define CPU_R3000	3000
#define CPU_R3900	3900
#define CPU_R4000	4000
#define CPU_R4010	4010
#define CPU_VR4100	4100
#define CPU_R4111	4111
#define CPU_VR4120	4120
#define CPU_R4300	4300
#define CPU_R4400	4400
#define CPU_R4600	4600
#define CPU_R4650	4650
#define CPU_R5000	5000
#define CPU_VR5400	5400
#define CPU_VR5500	5500
#define CPU_R5900	5900
#define CPU_R6000	6000
#define CPU_RM7000	7000
#define CPU_R8000	8000
#define CPU_RM9000	9000
#define CPU_R10000	10000
#define CPU_R12000	12000
#define CPU_R14000	14000
#define CPU_R16000	16000
#define CPU_MIPS16	16
#define CPU_MIPS32	32
#define CPU_MIPS32R2	33
#define CPU_MIPS32R3	34
#define CPU_MIPS32R5	36
#define CPU_MIPS32R6	37
#define CPU_MIPS5       5
#define CPU_MIPS64      64
#define CPU_MIPS64R2	65
#define CPU_MIPS64R3	66
#define CPU_MIPS64R5	68
#define CPU_MIPS64R6	69
#define CPU_ALLEGREX	10111431	/* octal 'AL', 31. */
#define CPU_SB1         12310201        /* octal 'SB', 01.  */
#define CPU_LOONGSON_2E 3001
#define CPU_LOONGSON_2F 3002
#define CPU_GS464	3003
#define CPU_GS464E	3004
#define CPU_GS264E	3005
#define CPU_OCTEON	6501
#define CPU_OCTEONP	6601
#define CPU_OCTEON2	6502
#define CPU_OCTEON3	6503
#define CPU_XLR     	887682   	/* decimal 'XLR'   */
#define CPU_INTERAPTIV_MR2 736550	/* decimal 'IA2'  */

/* Return true if the given CPU is included in INSN_* mask MASK.  */

static inline bool
cpu_is_member (int cpu, unsigned int mask)
{
  switch (cpu)
    {
    case CPU_R4650:
    case CPU_RM7000:
    case CPU_RM9000:
      return (mask & INSN_4650) != 0;

    case CPU_R4010:
      return (mask & INSN_4010) != 0;

    case CPU_VR4100:
      return (mask & INSN_4100) != 0;

    case CPU_R3900:
      return (mask & INSN_3900) != 0;

    case CPU_R10000:
    case CPU_R12000:
    case CPU_R14000:
    case CPU_R16000:
      return (mask & INSN_10000) != 0;

    case CPU_SB1:
      return (mask & INSN_SB1) != 0;

    case CPU_R4111:
      return (mask & INSN_4111) != 0;

    case CPU_VR4120:
      return (mask & INSN_4120) != 0;

    case CPU_VR5400:
      return (mask & INSN_5400) != 0;

    case CPU_VR5500:
      return (mask & INSN_5500) != 0;

    case CPU_R5900:
      return (mask & INSN_5900) != 0;

    case CPU_LOONGSON_2E:
      return (mask & INSN_LOONGSON_2E) != 0;

    case CPU_LOONGSON_2F:
      return (mask & INSN_LOONGSON_2F) != 0;

    case CPU_OCTEON:
      return (mask & INSN_OCTEON) != 0;

    case CPU_OCTEONP:
      return (mask & INSN_OCTEONP) != 0;

    case CPU_OCTEON2:
      return (mask & INSN_OCTEON2) != 0;

    case CPU_OCTEON3:
      return (mask & INSN_OCTEON3) != 0;

    case CPU_XLR:
      return (mask & INSN_XLR) != 0;

    case CPU_INTERAPTIV_MR2:
      return (mask & INSN_INTERAPTIV_MR2) != 0;

    case CPU_ALLEGREX:
      return (mask & INSN_ALLEGREX) != 0;

    default:
      return false;
    }
}

/* Return true if the given ISA is included in INSN_* mask MASK.  */

static inline bool
isa_is_member (int isa, unsigned int mask)
{
  isa &= INSN_ISA_MASK;
  mask &= INSN_ISA_MASK;

  if (isa == 0)
    return false;

  if (mask == 0)
    return false;

  if (((mips_isa_table[isa - 1] >> (mask - 1)) & 1) == 0)
    return false;

  return true;
}

/* Test for membership in an ISA including chip specific ISAs.  INSN
   is pointer to an element of the opcode table; ISA is the specified
   ISA/ASE bitmask to test against; and CPU is the CPU specific ISA to
   test, or zero if no CPU specific ISA test is desired.  Return true
   if instruction INSN is available to the given ISA and CPU. */

static inline bool
opcode_is_member (const struct mips_opcode *insn, int isa, int ase, int cpu)
{
  /* Test for ISA level exclusion.  */
  if (isa_is_member (isa, insn->exclusions))
    return false;

  /* Test for processor-specific exclusion.  */
  if (cpu_is_member (cpu, insn->exclusions))
    return false;

  /* Test for ISA level compatibility.  */
  if (isa_is_member (isa, insn->membership))
    return true;

  /* Test for ASE compatibility.  */
  if ((ase & insn->ase) != 0)
    return true;

  /* Test for processor-specific extensions.  */
  if (cpu_is_member (cpu, insn->membership))
    return true;

  return false;
}

/* This is a list of macro expanded instructions.

   _I appended means immediate
   _A appended means target address of a jump
   _AB appended means address with (possibly zero) base register
   _D appended means 64 bit floating point constant
   _S appended means 32 bit floating point constant.  */

enum
{
  M_ABS,
  M_ACLR_AB,
  M_ADD_I,
  M_ADDU_I,
  M_AND_I,
  M_ASET_AB,
  M_BALIGN,
  M_BC1FL,
  M_BC1TL,
  M_BC2FL,
  M_BC2TL,
  M_BEQ,
  M_BEQ_I,
  M_BEQL,
  M_BEQL_I,
  M_BGE,
  M_BGEL,
  M_BGE_I,
  M_BGEL_I,
  M_BGEU,
  M_BGEUL,
  M_BGEU_I,
  M_BGEUL_I,
  M_BGEZ,
  M_BGEZL,
  M_BGEZALL,
  M_BGT,
  M_BGTL,
  M_BGT_I,
  M_BGTL_I,
  M_BGTU,
  M_BGTUL,
  M_BGTU_I,
  M_BGTUL_I,
  M_BGTZ,
  M_BGTZL,
  M_BLE,
  M_BLEL,
  M_BLE_I,
  M_BLEL_I,
  M_BLEU,
  M_BLEUL,
  M_BLEU_I,
  M_BLEUL_I,
  M_BLEZ,
  M_BLEZL,
  M_BLT,
  M_BLTL,
  M_BLT_I,
  M_BLTL_I,
  M_BLTU,
  M_BLTUL,
  M_BLTU_I,
  M_BLTUL_I,
  M_BLTZ,
  M_BLTZL,
  M_BLTZALL,
  M_BNE,
  M_BNEL,
  M_BNE_I,
  M_BNEL_I,
  M_CACHE_AB,
  M_CACHEE_AB,
  M_DABS,
  M_DADD_I,
  M_DADDU_I,
  M_DDIV_3,
  M_DDIV_3I,
  M_DDIVU_3,
  M_DDIVU_3I,
  M_DIV_3,
  M_DIV_3I,
  M_DIVU_3,
  M_DIVU_3I,
  M_DLA_AB,
  M_DLCA_AB,
  M_DLI,
  M_DMUL,
  M_DMUL_I,
  M_DMULO,
  M_DMULO_I,
  M_DMULOU,
  M_DMULOU_I,
  M_DREM_3,
  M_DREM_3I,
  M_DREMU_3,
  M_DREMU_3I,
  M_DSUB_I,
  M_DSUBU_I,
  M_DSUBU_I_2,
  M_J_A,
  M_JAL_1,
  M_JAL_2,
  M_JAL_A,
  M_JALS_1,
  M_JALS_2,
  M_JALS_A,
  M_JRADDIUSP,
  M_JRC,
  M_L_DAB,
  M_LA_AB,
  M_LB_AB,
  M_LBE_AB,
  M_LBU_AB,
  M_LBUE_AB,
  M_LCA_AB,
  M_LD_AB,
  M_LDC1_AB,
  M_LDC2_AB,
  M_LQC2_AB,
  M_LDC3_AB,
  M_LDL_AB,
  M_LDM_AB,
  M_LDP_AB,
  M_LDR_AB,
  M_LH_AB,
  M_LHE_AB,
  M_LHU_AB,
  M_LHUE_AB,
  M_LI,
  M_LI_D,
  M_LI_DD,
  M_LI_S,
  M_LI_SS,
  M_LL_AB,
  M_LLD_AB,
  M_LLDP_AB,
  M_LLE_AB,
  M_LLWP_AB,
  M_LLWPE_AB,
  M_LQ_AB,
  M_LW_AB,
  M_LWE_AB,
  M_LWC0_AB,
  M_LWC1_AB,
  M_LWC2_AB,
  M_LWC3_AB,
  M_LWL_AB,
  M_LWLE_AB,
  M_LWM_AB,
  M_LWP_AB,
  M_LWR_AB,
  M_LWRE_AB,
  M_LWU_AB,
  M_MSGSND,
  M_MSGLD,
  M_MSGLD_T,
  M_MSGWAIT,
  M_MSGWAIT_T,
  M_MOVE,
  M_MOVEP,
  M_MUL,
  M_MUL_I,
  M_MULO,
  M_MULO_I,
  M_MULOU,
  M_MULOU_I,
  M_NOR_I,
  M_OR_I,
  M_PREF_AB,
  M_PREFE_AB,
  M_REM_3,
  M_REM_3I,
  M_REMU_3,
  M_REMU_3I,
  M_DROL,
  M_ROL,
  M_DROL_I,
  M_ROL_I,
  M_DROR,
  M_ROR,
  M_DROR_I,
  M_ROR_I,
  M_S_DA,
  M_S_DAB,
  M_S_S,
  M_SAA_AB,
  M_SAAD_AB,
  M_SC_AB,
  M_SCD_AB,
  M_SCDP_AB,
  M_SCE_AB,
  M_SCWP_AB,
  M_SCWPE_AB,
  M_SD_AB,
  M_SDC1_AB,
  M_SDC2_AB,
  M_SQC2_AB,
  M_SDC3_AB,
  M_SDL_AB,
  M_SDM_AB,
  M_SDP_AB,
  M_SDR_AB,
  M_SEQ,
  M_SEQ_I,
  M_SGE,
  M_SGE_I,
  M_SGEU,
  M_SGEU_I,
  M_SGT,
  M_SGT_I,
  M_SGTU,
  M_SGTU_I,
  M_SLE,
  M_SLE_I,
  M_SLEU,
  M_SLEU_I,
  M_SLT_I,
  M_SLTU_I,
  M_SNE,
  M_SNE_I,
  M_SB_AB,
  M_SBE_AB,
  M_SH_AB,
  M_SHE_AB,
  M_SQ_AB,
  M_SW_AB,
  M_SWE_AB,
  M_SWC0_AB,
  M_SWC1_AB,
  M_SWC2_AB,
  M_SWC3_AB,
  M_SWL_AB,
  M_SWLE_AB,
  M_SWM_AB,
  M_SWP_AB,
  M_SWR_AB,
  M_SWRE_AB,
  M_SUB_I,
  M_SUBU_I,
  M_SUBU_I_2,
  M_TEQ_I,
  M_TGE_I,
  M_TGEU_I,
  M_TLT_I,
  M_TLTU_I,
  M_TNE_I,
  M_TRUNCWD,
  M_TRUNCWS,
  M_ULD_AB,
  M_ULH_AB,
  M_ULHU_AB,
  M_ULW_AB,
  M_USH_AB,
  M_USW_AB,
  M_USD_AB,
  M_XOR_I,
  M_COP0,
  M_COP1,
  M_COP2,
  M_COP3,
  M_NUM_MACROS
};


/* The order of overloaded instructions matters.  Label arguments and
   register arguments look the same. Instructions that can have either
   for arguments must apear in the correct order in this table for the
   assembler to pick the right one. In other words, entries with
   immediate operands must apear after the same instruction with
   registers.

   Many instructions are short hand for other instructions (i.e., The
   jal <register> instruction is short for jalr <register>).  */

extern const struct mips_operand mips_vu0_channel_mask;
extern const struct mips_operand *decode_mips_operand (const char *);
extern const struct mips_opcode mips_builtin_opcodes[];
extern const int bfd_mips_num_builtin_opcodes;
extern struct mips_opcode *mips_opcodes;
extern int bfd_mips_num_opcodes;
#define NUMOPCODES bfd_mips_num_opcodes

\f
/* The rest of this file adds definitions for the mips16 TinyRISC
   processor.  */

/* These are the bitmasks and shift counts used for the different
   fields in the instruction formats.  Other than OP, no masks are
   provided for the fixed portions of an instruction, since they are
   not needed.

   The I format uses IMM11.

   The RI format uses RX and IMM8.

   The RR format uses RX, and RY.

   The RRI format uses RX, RY, and IMM5.

   The RRR format uses RX, RY, and RZ.

   The RRI_A format uses RX, RY, and IMM4.

   The SHIFT format uses RX, RY, and SHAMT.

   The I8 format uses IMM8.

   The I8_MOVR32 format uses RY and REGR32.

   The IR_MOV32R format uses REG32R and MOV32Z.

   The I64 format uses IMM8.

   The RI64 format uses RY and IMM5.
   */

#define MIPS16OP_MASK_RX	0x7
#define MIPS16OP_SH_RX		8
#define MIPS16OP_MASK_RY	0x7
#define MIPS16OP_SH_RY		5
#define MIPS16OP_MASK_RZ	0x7
#define MIPS16OP_SH_RZ		2

/* These are the characters which may appears in the args field of a
   MIPS16 instruction.  They appear in the order in which the fields
   appear when the instruction is used.  Commas and parentheses in the
   args string are ignored when assembling, and written into the output
   when disassembling.

   "y" 3-bit register at bit 5 (RY).
   "x" 3-bit register at bit 8 (RX).
   "z" 3-bit register at bit 2 (RZ).
   "Z" 3-bit register at bit 0 (MOV32Z).
   "v" 3-bit same register as source and destination at bit 8 (RX).
   "w" 3-bit same register as source and destination at bit 5 (RY).
   "." Zero register ($0).
   "S" Stack pointer ($sp or $29).
   "P" Program counter.
   "R" Return address register ($ra or $31).
   "X" 5-bit MIPS register at bit 0 (REGR32).
   "Y" 5-bit shuffled MIPS register at bit 3 (REG32R).
   "0" 5-bit ASMACRO p0 immediate.
   "1" 3-bit ASMACRO p1 immediate.
   "2" 3-bit ASMACRO p2 immediate.
   "3" 5-bit ASMACRO p3 immediate.
   "4" 3-bit ASMACRO p4 immediate.
   "6" 6-bit unsigned break code at bit 5.
   "a" 26-bit jump address.
   "i" Likewise, but flips bit 0.
   "e" 11-bit extension value.
   "l" Register list for ENTRY instruction.
   "L" Register list for EXIT instruction.
   ">" 5-bit SYNC code.
   "9" 9-bit signed immediate.
   "G" global pointer ($gp or $28).
   "N" 5-bit coprocessor register.
   "O" 3-bit sel field for MFC0/MTC0.
   "Q" 5-bit hardware register.
   "T" 5-bit CACHE opcode or PREF hint.
   "b" 5-bit INS/EXT position, which becomes LSB.
       Enforces: 0 <= pos < 32.
   "c" 5-bit INS size, which becomes MSB.
       Requires that "b" occurs first to set position.
       Enforces: 0 < (pos+size) <= 32.
   "d" 5-bit EXT size, which becomes MSBD.
       Requires that "b" occurs first to set position.
       Enforces: 0 < (pos+size) <= 32.
   "n" 2-bit immediate (1 .. 4).
   "o" 5-bit unsigned immediate * 16.
   "r" 3-bit register.
   "s" 3-bit ASMACRO select immediate.
   "u" 16-bit unsigned immediate.

   "I" An immediate value used for macros.

   The remaining codes may be extended.  Except as otherwise noted,
   the full extended operand is a 16 bit signed value.
   "<" 3-bit unsigned shift count * 1 at bit 2 (SHAMT) (full 5-bit unsigned).
   "[" 3-bit unsigned shift count * 1 at bit 2 (SHAMT) (full 6-bit unsigned).
   "]" 3-bit unsigned shift count * 1 at bit 8 (RX) (full 6-bit unsigned).
   "5" 5-bit unsigned immediate * 1 at bit 0 (IMM5).
   "F" 4-bit signed immediate * 1 a bit 0 (IMM4) (full 15-bit signed).
   "H" 5-bit unsigned immediate * 2 at bit 0 (IMM5).
   "W" 5-bit unsigned immediate * 4 at bit 0 (IMM5).
   "D" 5-bit unsigned immediate * 8 at bit 0 (IMM5).
   "j" 5-bit signed immediate * 1 at bit 0 (IMM5).
   "8" 8-bit unsigned immediate * 1 at bit 0 (IMM8).
   "V" 8-bit unsigned immediate * 4 at bit 0 (IMM8).
   "C" 8-bit unsigned immediate * 8 at bit 0 (IMM8).
   "U" 8-bit unsigned immediate * 1 at bit 0 (IMM8) (full 16-bit unsigned).
   "k" 8-bit signed immediate * 1 at bit 0 (IMM8).
   "K" 8-bit signed immediate * 8 at bit 0 (IMM8).
   "p" 8-bit conditional branch address at bit 0 (IMM8).
   "q" 11-bit branch address at bit 0 (IMM11).
   "A" 8-bit PC relative address * 4 at bit 0 (IMM8).
   "B" 5-bit PC relative address * 8 at bit 0 (IMM5).
   "E" 5-bit PC relative address * 4 at bit 0 (IMM5).
   "m" 7-bit register list for SAVE/RESTORE instruction (18-bit extended).

   Characters used so far, for quick reference when adding more:
   "0123456 89"
   ".[]<>"
   "ABCDEFGHI KL NOPQRSTUVWXYZ"
   "abcde   ijklmnopqrs uvwxyz"
  */

/* Save/restore encoding for the args field when all 4 registers are
   either saved as arguments or saved/restored as statics.  */
#define MIPS_SVRS_ALL_ARGS    0xe
#define MIPS_SVRS_ALL_STATICS 0xb

/* The following flags have the same value for the mips16 opcode
   table:

   INSN_ISA3

   INSN_UNCOND_BRANCH_DELAY
   INSN_COND_BRANCH_DELAY
   INSN_COND_BRANCH_LIKELY (never used)
   INSN_READ_HI
   INSN_READ_LO
   INSN_WRITE_HI
   INSN_WRITE_LO
   INSN_TRAP
   FP_D (never used)
   */

extern const struct mips_operand *decode_mips16_operand (char, bool);
extern const struct mips_opcode mips16_opcodes[];
extern const int bfd_mips16_num_opcodes;

/* These are the bit masks and shift counts used for the different fields
   in the microMIPS instruction formats.  No masks are provided for the
   fixed portions of an instruction, since they are not needed.  */

#define MICROMIPSOP_MASK_RS		0x1f
#define MICROMIPSOP_SH_RS		16
#define MICROMIPSOP_MASK_RT		0x1f
#define MICROMIPSOP_SH_RT		21
#define MICROMIPSOP_MASK_RD		0x1f
#define MICROMIPSOP_SH_RD		11
#define MICROMIPSOP_MASK_BCC		0x7
#define MICROMIPSOP_SH_BCC		18
#define MICROMIPSOP_MASK_MD		0x7
#define MICROMIPSOP_SH_MD		7
#define MICROMIPSOP_MASK_MJ		0x1f
#define MICROMIPSOP_SH_MJ		0

/* These are the characters which may appears in the args field of a
   microMIPS instruction.  They appear in the order in which the fields
   appear when the instruction is used.  Commas and parentheses in the
   args string are ignored when assembling, and written into the output
   when disassembling.

   The followings are for 16-bit microMIPS instructions.

   "ma" Must be $28.
   "mc" 3-bit registers 2-7, 16, 17 at bit 4.
	The same register used as both source and target.
   "md" 3-bit registers 2-7, 16, 17 at bit 7.
   "me" 3-bit registers 2-7, 16, 17 at bit 1.
	The same register used as both source and target.
   "mf" 3-bit registers 2-7, 16, 17 at bit 3.
   "mg" 3-bit registers 2-7, 16, 17 at bit 0.
   "mh" 3-bit register pair at bit 7.
   "mj" 5-bit registers at bit 0.
   "ml" 3-bit registers 2-7, 16, 17 at bit 4.
   "mm" 3-bit registers 0, 2, 3, 16-20 at bit 1.
   "mn" 3-bit registers 0, 2, 3, 16-20 at bit 4.
   "mp" 5-bit registers at bit 5.
   "mq" 3-bit registers 0, 2-7, 17 at bit 7.
   "mr" Must be program counter.
   "ms" Must be $29.
   "mt" Must be the same as the previous register.
   "mx" Must be the same as the destination register.
   "my" Must be $31.
   "mz" Must be $0.

   "mA" 7-bit immediate (-64 .. 63) << 2 at bit 0.
   "mB" 3-bit immediate (-1, 1, 4, 8, 12, 16, 20, 24) at bit 1.
   "mC" 4-bit immediate (1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64, 128, 255,
	32768, 65535) at bit 0.
   "mD" 10-bit branch address (-512 .. 511) << 1 at bit 0.
   "mE" 7-bit branch address (-64 .. 63) << 1 at bit 0.
   "mF" 4-bit immediate (0 .. 15) at bit 0.
   "mG" 4-bit immediate (-1 .. 14) at bit 0.
   "mH" 4-bit immediate (0 .. 15) << 1 at bit 0.
   "mI" 7-bit immediate (-1 .. 126) at bit 0.
   "mJ" 4-bit immediate (0 .. 15) << 2 at bit 0.
   "mL" 4-bit immediate (0 .. 15) at bit 0.
   "mM" 3-bit immediate (1 .. 8) at bit 1.
   "mN" 2-bit immediate (0 .. 3) for register list at bit 4.
   "mO" 4-bit immediate (0 .. 15) at bit 0.
   "mP" 5-bit immediate (0 .. 31) << 2 at bit 0.
   "mU" 5-bit immediate (0 .. 31) << 2 at bit 0.
   "mW" 6-bit immediate (0 .. 63) << 2 at bit 1.
   "mX" 4-bit immediate (-8 .. 7) at bit 1.
   "mY" 9-bit immediate (-258 .. -3, 2 .. 257) << 2 at bit 1.
   "mZ" Must be zero.

   In most cases 32-bit microMIPS instructions use the same characters
   as MIPS (with ADDIUPC being a notable exception, but there are some
   others too).

   "." 10-bit signed offset/number at bit 6.
   "1" 5-bit SYNC type at bit 16.
   "<" 5-bit shift amount at bit 11.
   ">" Shift amount between 32 and 63, stored after subtracting 3, at bit 11.
   "\" 3-bit position for ASET and ACLR at bit 21.
   "|" 4-bit trap code at bit 12.
   "~" 12-bit signed offset at bit 0.
   "a" 26-bit target address at bit 0.
   "+i" Likewise, but flips bit 0.
   "b" 5-bit base register at bit 16 (RS).
   "c" 10-bit higher breakpoint code at bit 16.
   "d" 5-bit destination register at bit 11 (RD).
   "h" 5-bit PREFX hint at bit 11.
   "i" 16-bit unsigned immediate at bit 0.
   "j" 16-bit signed immediate at bit 0.
   "k" 5-bit CACHE opcode in target register position at bit 21.
   "n" 5-bit register list for 32-bit LWM/SWM instruction at bit 21 (RT).
   "o" 16-bit signed offset at bit 0.
   "p" 16-bit PC-relative branch target address at bit 0.
   "q" 10-bit lower breakpoint code at bit 6.
   "r" 5-bit same register used as both source and target at bit 16 (RS).
   "s" 5-bit source register at bit 16 (RS).
   "t" 5-bit target register at bit 21 (RT).
   "u" 16-bit upper 16 bits of address at bit 0.
   "v" 5-bit same register used as both source and destination at bit 16 (RS).
   "w" 5-bit same register used as both target and destination at bit 21 (RT).
   "x" 5-bit source 3 register for ALNV.PS at bit 6.
   "z" Must be zero register.
   "C" 23-bit coprocessor function code at bit 3.
   "K" 5-bit Hardware Register (RDHWR instruction) at bit 16 (RS).

   "+A" 5-bit INS/EXT/DINS/DEXT/DINSM/DEXTM position at bit 6,
	which becomes LSB.
	Enforces: 0 <= pos < 32.
   "+B" 5-bit INS/DINS size at bit 11, which becomes MSB.
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 0 < (pos+size) <= 32.
   "+C" 5-bit EXT/DEXT size at bit 11, which becomes MSBD.
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 0 < (pos+size) <= 32.
	(Also used by DEXT w/ different limits, but limits for
	that are checked by the M_DEXT macro.)
   "+E" 5-bit DINSU/DEXTU position at bit 6, which becomes LSB-32.
	Enforces: 32 <= pos < 64.
   "+F" 5-bit DINSM/DINSU size at bit 11., which becomes MSB-32.
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 32 < (pos+size) <= 64.
   "+G" 5-bit DEXTM size at bit 11, which becomes MSBD-32.
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 32 < (pos+size) <= 64.
   "+H" 5-bit DEXTU size at bit 11, which becomes MSBD.
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 32 < (pos+size) <= 64.
   "+J" 10-bit SYSCALL/WAIT/SDBBP/HYPCALL function code at bit 16.

   PC-relative addition (ADDIUPC) instruction:
   "mQ" 23-bit offset (-4194304 .. 4194303) << 2 at bit 0.
   "mb" 3-bit MIPS registers 2-7, 16, 17 at bit 23.

   Floating point instructions:
   "D" 5-bit destination register at bit 11 (FD).
   "M" 3-bit compare condition code at bit 13 (CCC).
   "N" 3-bit branch condition code at bit 18 (BCC).
   "R" 5-bit fr source 3 register at bit 6 (FR).
   "S" 5-bit fs source 1 register at bit 16 (FS).
   "T" 5-bit ft source 2 register at bit 21 (FT).
   "V" 5-bit same register used as floating source and destination or target
       at bit 16 (FS).

   Coprocessor instructions:
   "E" 5-bit target register at bit 21 (RT).
   "G" 5-bit source register at bit 16 (RS).
   "H" 3-bit sel field for (D)MTC* and (D)MFC* at bit 11.
   "g" 5-bit control source register at bit 16 (RS).

   Macro instructions:
   "A" General 32-bit expression.
   "I" 32-bit immediate (value placed in imm_expr).
   "F" 64-bit floating point constant in .rdata.
   "L" 64-bit floating point constant in .lit8.
   "f" 32-bit floating point constant.
   "l" 32-bit floating point constant in .lit4.

   DSP ASE usage:
   "2" 2-bit unsigned immediate for byte align at bit 14.
   "3" 3-bit unsigned immediate at bit 13.
   "4" 4-bit unsigned immediate at bit 12.
   "5" 8-bit unsigned immediate at bit 13.
   "6" 5-bit unsigned immediate at bit 16 (RS).
   "7" 2-bit DSP accumulator register at bit 14.
   "8" 6-bit unsigned immediate at bit 14.
   "0" 6-bit signed immediate at bit 16.
   "@" 10-bit signed immediate at bit 16.
   "^" 5-bit unsigned immediate at bit 11 (RD).

   microMIPS Enhanced VA Scheme:
   "+j" 9-bit signed offset in bit 0.

   MSA Extension:
   "+d" 5-bit MSA register at bit 6 (FD).
   "+e" 5-bit MSA register at bit 11 (FS).
   "+h" 5-bit MSA register at bit 16 (FT).
   "+k" 5-bit GPR at bit 6.
   "+l" 5-bit MSA control register at bit 6.
   "+n" 5-bit MSA control register at bit 11.
   "+o" 4-bit vector element index at bit 16.
   "+u" 3-bit vector element index at bit 16.
   "+v" 2-bit vector element index at bit 16.
   "+w" 1-bit vector element index at bit 16.
   "+x" 5-bit shift amount at bit 16.
   "+T" (-512 .. 511) << 0 at bit 16.
   "+U" (-512 .. 511) << 1 at bit 16.
   "+V" (-512 .. 511) << 2 at bit 16.
   "+W" (-512 .. 511) << 3 at bit 16.
   "+~" 2-bit LSA/DLSA shift amount from 1 to 4 at bit 6.
   "+!" 3-bit unsigned bit position at bit 16.
   "+@" 4-bit unsigned bit position at bit 16.
   "+#" 6-bit unsigned bit position at bit 16.
   "+$" 5-bit unsigned immediate at bit 16.
   "+%" 5-bit signed immediate at bit 16.
   "+^" 10-bit signed immediate at bit 11.
   "+&" 0 vector element index.
   "+*" 5-bit register vector element index at bit 16.
   "+|" 8-bit mask at bit 16.

   MT ASE usage:
   "!" 1-bit usermode flag at bit 10.
   "$" 1-bit load high flag at bit 9.
   "*" 2-bit DSP accumulator register at bit 23.
   "&" 2-bit DSP accumulator register at bit 18.
   "J" 3-bit MFTR and MTTR sel at bit 4.
   "y" 5-bit control target register at bit 21 (RT).

   Other:
   "()" Parens surrounding optional value.
   ","  Separates operands.
   "m"  Start of microMIPS extension sequence.
   "+"  Start of extension sequence.
   "-"  Start of extension sequence.

   Characters used so far, for quick reference when adding more:
   "12345678 0"
   "<>(),+-.@!$&*\^|~"
   "ABCDEFGHIJKLMN   RST V    "
   "abcd fghijklmnopqrstuvwxyz"

   Extension character sequences used so far ("m" followed by the
   following), for quick reference when adding more:
   ""
   ""
   " BCDEFGHIJ LMNOPQ   U WXYZ"
   " bcdefghij lmn pq st   xyz"

   Extension character sequences used so far ("+" followed by the
   following), for quick reference when adding more:
   ""
   "~!@#$%^&*|"
   "ABC EFGH J         TUVW   "
   "   de  hijkl no     uvwx  "

   Extension character sequences used so far ("-" followed by the
   following), for quick reference when adding more:
   ""
   ""
   <none so far>
*/

extern const struct mips_operand *decode_micromips_operand (const char *);
extern const struct mips_opcode micromips_opcodes[];
extern const int bfd_micromips_num_opcodes;

/* A NOP insn impemented as "or at,at,zero".
   Used to implement -mfix-loongson2f.  */
#define LOONGSON2F_NOP_INSN	0x00200825

#ifdef __cplusplus
}
#endif

#endif /* _MIPS_H_ */