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/* mips.h. Mips opcode list for GDB, the GNU debugger.
Copyright 1993 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* 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).
The syscall instruction uses SYSCALL.
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_FMT 0x1f
#define OP_SH_FMT 21
#define OP_MASK_CODE 0x3ff
#define OP_SH_CODE 16
#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_SYSCALL 0xfffff
#define OP_SH_SYSCALL 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
/* 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 instead the
ISA level of the macro (0 or 1 is always supported, 2 is ISA 2,
etc.). */
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;
};
/* These are the characters which may appears 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)
"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)
"o" 16 bit signed offset (OP_*_DELTA)
"p" 16 bit PC relative branch target address (OP_*_DELTA)
"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)
"C" 25 bit coprocessor function code (OP_*_COPZ)
"B" 20 bit syscall function code (OP_*_SYSCALL)
"x" accept and ignore register name
"z" must be zero register
Floating point instructions:
"D" 5 bit destination register (OP_*_FD)
"S" 5 bit fs source 1 register (OP_*_FS)
"T" 5 bit ft source 2 register (OP_*_FT)
"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)
Macro instructions:
"A" General 32 bit expression
"I" 32 bit immediate
"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
*/
/* 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
/* Modifies coprocessor condition code. */
#define INSN_WRITE_COND_CODE 0x00000400
/* Reads coprocessor condition code. */
#define INSN_READ_COND_CODE 0x00000800
/* TLB operation. */
#define INSN_TLB 0x00001000
/* RFE (return from exception) instruction. */
#define INSN_RFE 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
/* MIPS ISA 2 instruction (R6000 or R4000). */
#define INSN_ISA2 0x10000000
/* MIPS ISA 3 instruction (R4000). */
#define INSN_ISA3 0x20000000
/* Instruction is actually a macro. It should be ignored by the
disassembler, and requires special treatment by the assembler. */
#define INSN_MACRO 0xffffffff
/* This is a list of macro expanded instructions.
*
* _I appended means immediate
* _A appended means address
* _AB appended means address with base register
* _D appended means 64 bit floating point constant
* _S appended means 32 bit floating point constant
*/
enum {
M_ABS,
M_ADD_I,
M_ADDU_I,
M_AND_I,
M_BEQ_I,
M_BEQL_I,
M_BGE,
M_BGEL,
M_BGE_I,
M_BGEL_I,
M_BGEU,
M_BGEUL,
M_BGEU_I,
M_BGEUL_I,
M_BGT,
M_BGTL,
M_BGT_I,
M_BGTL_I,
M_BGTU,
M_BGTUL,
M_BGTU_I,
M_BGTUL_I,
M_BLE,
M_BLEL,
M_BLE_I,
M_BLEL_I,
M_BLEU,
M_BLEUL,
M_BLEU_I,
M_BLEUL_I,
M_BLT,
M_BLTL,
M_BLT_I,
M_BLTL_I,
M_BLTU,
M_BLTUL,
M_BLTU_I,
M_BLTUL_I,
M_BNE_I,
M_BNEL_I,
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_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_J_A,
M_JAL_1,
M_JAL_2,
M_JAL_A,
M_L_DOB,
M_L_DAB,
M_LA_AB,
M_LB_A,
M_LB_AB,
M_LBU_A,
M_LBU_AB,
M_LD_A,
M_LD_OB,
M_LD_AB,
M_LDC1_AB,
M_LDC2_AB,
M_LDC3_AB,
M_LDL_AB,
M_LDR_AB,
M_LH_A,
M_LH_AB,
M_LHU_A,
M_LHU_AB,
M_LI,
M_LI_D,
M_LI_DD,
M_LI_S,
M_LI_SS,
M_LL_AB,
M_LLD_AB,
M_LS_A,
M_LW_A,
M_LW_AB,
M_LWC0_A,
M_LWC0_AB,
M_LWC1_A,
M_LWC1_AB,
M_LWC2_A,
M_LWC2_AB,
M_LWC3_A,
M_LWC3_AB,
M_LWL_A,
M_LWL_AB,
M_LWR_A,
M_LWR_AB,
M_LWU_AB,
M_MUL,
M_MUL_I,
M_MULO,
M_MULO_I,
M_MULOU,
M_MULOU_I,
M_NOR_I,
M_OR_I,
M_REM_3,
M_REM_3I,
M_REMU_3,
M_REMU_3I,
M_ROL,
M_ROL_I,
M_ROR,
M_ROR_I,
M_S_DA,
M_S_DOB,
M_S_DAB,
M_S_S,
M_SC_AB,
M_SCD_AB,
M_SD_A,
M_SD_OB,
M_SD_AB,
M_SDC1_AB,
M_SDC2_AB,
M_SDC3_AB,
M_SDL_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_A,
M_SB_AB,
M_SH_A,
M_SH_AB,
M_SW_A,
M_SW_AB,
M_SWC0_A,
M_SWC0_AB,
M_SWC1_A,
M_SWC1_AB,
M_SWC2_A,
M_SWC2_AB,
M_SWC3_A,
M_SWC3_AB,
M_SWL_A,
M_SWL_AB,
M_SWR_A,
M_SWR_AB,
M_SUB_I,
M_SUBU_I,
M_TEQ_I,
M_TGE_I,
M_TGEU_I,
M_TLT_I,
M_TLTU_I,
M_TNE_I,
M_TRUNCWD,
M_TRUNCWS,
M_ULH,
M_ULH_A,
M_ULHU,
M_ULHU_A,
M_ULW,
M_ULW_A,
M_USH,
M_USH_A,
M_USW,
M_USW_A,
M_XOR_I
};
/* 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_opcode mips_opcodes[];
extern const int bfd_mips_num_opcodes;
#define NUMOPCODES bfd_mips_num_opcodes
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