mips.h

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/* mips.h.  Mips opcode list for GDB, the GNU debugger.
   Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
   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
1, 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 COPYING.  If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifndef _MIPS_H_
#define _MIPS_H_

/* 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 signal operand
   (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_FR		0x1f
#define OP_SH_FR		21
#define OP_MASK_FMT		0x1f
#define OP_SH_FMT		21
#define OP_MASK_BCC		0x7
#define OP_SH_BCC		18
#define OP_MASK_CODE		0x3ff
#define OP_SH_CODE		16
#define OP_MASK_CODE2		0x3ff
#define OP_SH_CODE2		6
#define OP_MASK_RT		0x1f
#define OP_SH_RT		16
#define OP_MASK_FT		0x1f
#define OP_SH_FT		16
#define OP_MASK_CACHE		0x1f
#define OP_SH_CACHE		16
#define OP_MASK_RD		0x1f
#define OP_SH_RD		11
#define OP_MASK_FS		0x1f
#define OP_SH_FS		11
#define OP_MASK_PREFX		0x1f
#define OP_SH_PREFX		11
#define OP_MASK_CCC		0x7
#define OP_SH_CCC		8
#define OP_MASK_CODE20		0xfffff /* 20 bit syscall/breakpoint code.  */
#define OP_SH_CODE20		6
#define OP_MASK_SHAMT		0x1f
#define OP_SH_SHAMT		6
#define OP_MASK_FD		0x1f
#define OP_SH_FD		6
#define OP_MASK_TARGET		0x3ffffff
#define OP_SH_TARGET		0
#define OP_MASK_COPZ		0x1ffffff
#define OP_SH_COPZ		0
#define OP_MASK_IMMEDIATE	0xffff
#define OP_SH_IMMEDIATE		0
#define OP_MASK_DELTA		0xffff
#define OP_SH_DELTA		0
#define OP_MASK_FUNCT		0x3f
#define OP_SH_FUNCT		0
#define OP_MASK_SPEC		0x3f
#define OP_SH_SPEC		0
#define OP_SH_LOCC              8       /* FP condition code.  */
#define OP_SH_HICC              18      /* FP condition code.  */
#define OP_MASK_CC              0x7
#define OP_SH_COP1NORM          25      /* Normal COP1 encoding.  */
#define OP_MASK_COP1NORM        0x1     /* a single bit.  */
#define OP_SH_COP1SPEC          21      /* COP1 encodings.  */
#define OP_MASK_COP1SPEC        0xf
#define OP_MASK_COP1SCLR        0x4
#define OP_MASK_COP1CMP         0x3
#define OP_SH_COP1CMP           4
#define OP_SH_FORMAT            21      /* FP short format field.  */
#define OP_MASK_FORMAT          0x7
#define OP_SH_TRUE              16
#define OP_MASK_TRUE            0x1
#define OP_SH_GE                17
#define OP_MASK_GE              0x01
#define OP_SH_UNSIGNED          16
#define OP_MASK_UNSIGNED        0x1
#define OP_SH_HINT              16
#define OP_MASK_HINT            0x1f
#define OP_SH_MMI               0       /* Multimedia (parallel) op.  */
#define OP_MASK_MMI             0x3f
#define OP_SH_MMISUB            6
#define OP_MASK_MMISUB          0x1f
#define OP_MASK_PERFREG		0x1f	/* Performance monitoring.  */
#define OP_SH_PERFREG		1
#define OP_SH_SEL		0	/* Coprocessor select field.  */
#define OP_MASK_SEL		0x7	/* The sel field of mfcZ and mtcZ.  */
#define OP_SH_CODE19		6       /* 19 bit wait code.  */
#define OP_MASK_CODE19		0x7ffff
#define OP_SH_ALN		21
#define OP_MASK_ALN		0x7
#define OP_SH_VSEL		21
#define OP_MASK_VSEL		0x1f
#define OP_MASK_VECBYTE		0x7	/* Selector field is really 4 bits,
					   but 0x8-0xf don't select bytes.  */
#define OP_SH_VECBYTE		22
#define OP_MASK_VECALIGN	0x7	/* Vector byte-align (alni.ob) op.  */
#define OP_SH_VECALIGN		21
#define OP_MASK_INSMSB		0x1f	/* "ins" MSB.  */
#define OP_SH_INSMSB		11
#define OP_MASK_EXTMSBD		0x1f	/* "ext" MSBD.  */
#define OP_SH_EXTMSBD		11

#define	OP_OP_COP0		0x10
#define	OP_OP_COP1		0x11
#define	OP_OP_COP2		0x12
#define	OP_OP_COP3		0x13
#define	OP_OP_LWC1		0x31
#define	OP_OP_LWC2		0x32
#define	OP_OP_LWC3		0x33	/* a.k.a. pref */
#define	OP_OP_LDC1		0x35
#define	OP_OP_LDC2		0x36
#define	OP_OP_LDC3		0x37	/* a.k.a. ld */
#define	OP_OP_SWC1		0x39
#define	OP_OP_SWC2		0x3a
#define	OP_OP_SWC3		0x3b
#define	OP_OP_SDC1		0x3d
#define	OP_OP_SDC2		0x3e
#define	OP_OP_SDC3		0x3f	/* a.k.a. sd */

/* 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

/* 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 bits describing the instruction sets of which this
     instruction or macro is a member. */
  unsigned long membership;
};

/* These are the characters which may appear in the args field of an
   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.

   Each of these characters corresponds to a mask field defined above.

   "<" 5 bit shift amount (OP_*_SHAMT)
   ">" shift amount between 32 and 63, stored after subtracting 32 (OP_*_SHAMT)
   "a" 26 bit target address (OP_*_TARGET)
   "b" 5 bit base register (OP_*_RS)
   "c" 10 bit breakpoint code (OP_*_CODE)
   "d" 5 bit destination register specifier (OP_*_RD)
   "h" 5 bit prefx hint (OP_*_PREFX)
   "i" 16 bit unsigned immediate (OP_*_IMMEDIATE)
   "j" 16 bit signed immediate (OP_*_DELTA)
   "k" 5 bit cache opcode in target register position (OP_*_CACHE)
       Also used for immediate operands in vr5400 vector insns.
   "o" 16 bit signed offset (OP_*_DELTA)
   "p" 16 bit PC relative branch target address (OP_*_DELTA)
   "q" 10 bit extra breakpoint code (OP_*_CODE2)
   "r" 5 bit same register used as both source and target (OP_*_RS)
   "s" 5 bit source register specifier (OP_*_RS)
   "t" 5 bit target register (OP_*_RT)
   "u" 16 bit upper 16 bits of address (OP_*_IMMEDIATE)
   "v" 5 bit same register used as both source and destination (OP_*_RS)
   "w" 5 bit same register used as both target and destination (OP_*_RT)
   "U" 5 bit same destination register in both OP_*_RD and OP_*_RT
       (used by clo and clz)
   "C" 25 bit coprocessor function code (OP_*_COPZ)
   "B" 20 bit syscall/breakpoint function code (OP_*_CODE20)
   "J" 19 bit wait function code (OP_*_CODE19)
   "x" accept and ignore register name
   "z" must be zero register
   "K" 5 bit Hardware Register (rdhwr instruction) (OP_*_RD)
   "+A" 5 bit ins/ext position, which becomes LSB (OP_*_SHAMT).
	Enforces: 0 <= pos < 32.
   "+B" 5 bit ins size, which becomes MSB (OP_*_INSMSB).
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 0 < (pos+size) <= 32.
   "+C" 5 bit ext size, which becomes MSBD (OP_*_EXTMSBD).
	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 dins/dext position, which becomes LSB-32 (OP_*_SHAMT).
	Enforces: 32 <= pos < 64.
   "+F" 5 bit "dinsm" size, which becomes MSB-32 (OP_*_INSMSB).
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 32 < (pos+size) <= 64.
   "+G" 5 bit "dextm" size, which becomes MSBD-32 (OP_*_EXTMSBD).
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 32 < (pos+size) <= 64.
   "+H" 5 bit "dextu" size, which becomes MSBD (OP_*_EXTMSBD).
	Requires that "+A" or "+E" occur first to set position.
	Enforces: 32 < (pos+size) <= 64.

   Floating point instructions:
   "D" 5 bit destination register (OP_*_FD)
   "M" 3 bit compare condition code (OP_*_CCC) (only used for mips4 and up)
   "N" 3 bit branch condition code (OP_*_BCC) (only used for mips4 and up)
   "S" 5 bit fs source 1 register (OP_*_FS)
   "T" 5 bit ft source 2 register (OP_*_FT)
   "R" 5 bit fr source 3 register (OP_*_FR)
   "V" 5 bit same register used as floating source and destination (OP_*_FS)
   "W" 5 bit same register used as floating target and destination (OP_*_FT)

   Coprocessor instructions:
   "E" 5 bit target register (OP_*_RT)
   "G" 5 bit destination register (OP_*_RD)
   "H" 3 bit sel field for (d)mtc* and (d)mfc* (OP_*_SEL)
   "P" 5 bit performance-monitor register (OP_*_PERFREG)
   "e" 5 bit vector register byte specifier (OP_*_VECBYTE)
   "%" 3 bit immediate vr5400 vector alignment operand (OP_*_VECALIGN)
   see also "k" above
   "+D" Combined destination register ("G") and sel ("H") for CP0 ops,
	for pretty-printing in disassembly only.

   Macro instructions:
   "A" General 32 bit expression
   "I" 32 bit immediate (value placed in imm_expr).
   "+I" 32 bit immediate (value placed in imm2_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 instruction operands (note that while these use the FP register
   fields, they accept both $fN and $vN names for the registers):  
   "O"	MDMX alignment offset (OP_*_ALN)
   "Q"	MDMX vector/scalar/immediate source (OP_*_VSEL and OP_*_FT)
   "X"	MDMX destination register (OP_*_FD) 
   "Y"	MDMX source register (OP_*_FS)
   "Z"	MDMX source register (OP_*_FT)

   Other:
   "()" parens surrounding optional value
   ","  separates operands
   "[]" brackets around index for vector-op scalar operand specifier (vr5400)
   "+"  Start of extension sequence.

   Characters used so far, for quick reference when adding more:
   "%[]<>(),+"
   "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
   "abcdefhijklopqrstuvwxz"

   Extension character sequences used so far ("+" followed by the
   following), for quick reference when adding more:
   "ABCDEFGHI"
*/

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

/* Modifies the general purpose register in OP_*_RD.  */
#define INSN_WRITE_GPR_D            0x00000001
/* Modifies the general purpose register in OP_*_RT.  */
#define INSN_WRITE_GPR_T            0x00000002
/* Modifies general purpose register 31.  */
#define INSN_WRITE_GPR_31           0x00000004
/* Modifies the floating point register in OP_*_FD.  */
#define INSN_WRITE_FPR_D            0x00000008
/* Modifies the floating point register in OP_*_FS.  */
#define INSN_WRITE_FPR_S            0x00000010
/* Modifies the floating point register in OP_*_FT.  */
#define INSN_WRITE_FPR_T            0x00000020
/* Reads the general purpose register in OP_*_RS.  */
#define INSN_READ_GPR_S             0x00000040
/* Reads the general purpose register in OP_*_RT.  */
#define INSN_READ_GPR_T             0x00000080
/* Reads the floating point register in OP_*_FS.  */
#define INSN_READ_FPR_S             0x00000100
/* Reads the floating point register in OP_*_FT.  */
#define INSN_READ_FPR_T             0x00000200
/* Reads the floating point register in OP_*_FR.  */
#define INSN_READ_FPR_R		    0x00000400
/* Modifies coprocessor condition code.  */
#define INSN_WRITE_COND_CODE        0x00000800
/* Reads coprocessor condition code.  */
#define INSN_READ_COND_CODE         0x00001000
/* TLB operation.  */
#define INSN_TLB                    0x00002000
/* Reads coprocessor register other than floating point register.  */
#define INSN_COP                    0x00004000
/* Instruction loads value from memory, requiring delay.  */
#define INSN_LOAD_MEMORY_DELAY      0x00008000
/* Instruction loads value from coprocessor, requiring delay.  */
#define INSN_LOAD_COPROC_DELAY	    0x00010000
/* Instruction has unconditional branch delay slot.  */
#define INSN_UNCOND_BRANCH_DELAY    0x00020000
/* Instruction has conditional branch delay slot.  */
#define INSN_COND_BRANCH_DELAY      0x00040000
/* Conditional branch likely: if branch not taken, insn nullified.  */
#define INSN_COND_BRANCH_LIKELY	    0x00080000
/* Moves to coprocessor register, requiring delay.  */
#define INSN_COPROC_MOVE_DELAY      0x00100000
/* Loads coprocessor register from memory, requiring delay.  */
#define INSN_COPROC_MEMORY_DELAY    0x00200000
/* Reads the HI register.  */
#define INSN_READ_HI		    0x00400000
/* Reads the LO register.  */
#define INSN_READ_LO		    0x00800000
/* Modifies the HI register.  */
#define INSN_WRITE_HI		    0x01000000
/* Modifies the LO register.  */
#define INSN_WRITE_LO		    0x02000000
/* Takes a trap (easier to keep out of delay slot).  */
#define INSN_TRAP                   0x04000000
/* Instruction stores value into memory.  */
#define INSN_STORE_MEMORY	    0x08000000
/* Instruction uses single precision floating point.  */
#define FP_S			    0x10000000
/* Instruction uses double precision floating point.  */
#define FP_D			    0x20000000
/* Instruction is part of the tx39's integer multiply family.    */
#define INSN_MULT                   0x40000000
/* Instruction synchronize shared memory.  */
#define INSN_SYNC		    0x80000000
/* Instruction reads MDMX accumulator.  XXX FIXME: No bits left!  */
#define INSN_READ_MDMX_ACC	    0
/* Instruction writes MDMX accumulator.  XXX FIXME: No bits left!  */
#define INSN_WRITE_MDMX_ACC	    0

/* Instruction is actually a macro.  It should be ignored by the
   disassembler, and requires special treatment by the assembler.  */
#define INSN_MACRO                  0xffffffff

/* Masks used to mark instructions to indicate which MIPS ISA level
   they were introduced in.  ISAs, as defined below, are logical
   ORs of these bits, indicating that they support the instructions
   defined at the given level.  */

#define INSN_ISA_MASK		  0x00000fff
#define INSN_ISA1                 0x00000001
#define INSN_ISA2                 0x00000002
#define INSN_ISA3                 0x00000004
#define INSN_ISA4                 0x00000008
#define INSN_ISA5                 0x00000010
#define INSN_ISA32                0x00000020
#define INSN_ISA64                0x00000040
#define INSN_ISA32R2              0x00000080
#define INSN_ISA64R2              0x00000100

/* Masks used for MIPS-defined ASEs.  */
#define INSN_ASE_MASK		  0x0000f000

/* MIPS 16 ASE */
#define INSN_MIPS16               0x00002000
/* MIPS-3D ASE */
#define INSN_MIPS3D               0x00004000
/* MDMX ASE */ 
#define INSN_MDMX                 0x00008000

/* Chip specific instructions.  These are bitmasks.  */

/* MIPS R4650 instruction.  */
#define INSN_4650                 0x00010000
/* LSI R4010 instruction.  */
#define INSN_4010                 0x00020000
/* NEC VR4100 instruction.  */
#define INSN_4100                 0x00040000
/* Toshiba R3900 instruction.  */
#define INSN_3900                 0x00080000
/* MIPS R10000 instruction.  */
#define INSN_10000                0x00100000
/* Broadcom SB-1 instruction.  */
#define INSN_SB1                  0x00200000
/* NEC VR4111/VR4181 instruction.  */
#define INSN_4111                 0x00400000
/* NEC VR4120 instruction.  */
#define INSN_4120                 0x00800000
/* NEC VR5400 instruction.  */
#define INSN_5400		  0x01000000
/* NEC VR5500 instruction.  */
#define INSN_5500		  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       (ISA_MIPS1 | INSN_ISA2)
#define       ISA_MIPS3       (ISA_MIPS2 | INSN_ISA3)
#define       ISA_MIPS4       (ISA_MIPS3 | INSN_ISA4)
#define       ISA_MIPS5       (ISA_MIPS4 | INSN_ISA5)

#define       ISA_MIPS32      (ISA_MIPS2 | INSN_ISA32)
#define       ISA_MIPS64      (ISA_MIPS5 | INSN_ISA32 | INSN_ISA64)

#define       ISA_MIPS32R2    (ISA_MIPS32 | INSN_ISA32R2)
#define       ISA_MIPS64R2    (ISA_MIPS64 | INSN_ISA32R2 | INSN_ISA64R2)


/* 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