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binutils-gdb/include/opcode/mips.h
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/* mips.h. Mips opcode list for GDB, the GNU debugger.
Copyright 1993, 94, 95, 96, 1997 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
/* 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 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)
"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)
"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
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)
"P" 5 bit performance-monitor register (OP_*_PERFREG)
"H" 3 bit sel field (OP_*_SEL)
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
Other:
"()" parens surrounding optional value
"," separates operands
Characters used so far, for quick reference when adding more:
"<>(),"
"ABCDEFGHIJLMNPRSTUVW"
"abcdfhijklopqrstuvwxz"
*/
/* 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 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, indicatingthat they support the instructions
defined at the given level. */
#define INSN_ISA1 0x00000010
#define INSN_ISA2 0x00000020
#define INSN_ISA3 0x00000040
#define INSN_ISA4 0x00000080
#define INSN_ISA5 0x00000100
#define INSN_ISA32 0x00000200
#define INSN_ISA64 0x00000400
/* 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
/* 32-bit code running on a ISA3+ CPU. */
#define INSN_GP32 0x00100000
/* 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)
/* 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_R2000 2000
#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_R4300 4300
#define CPU_R4400 4400
#define CPU_R4600 4600
#define CPU_R4650 4650
#define CPU_R5000 5000
#define CPU_R6000 6000
#define CPU_R8000 8000
#define CPU_R10000 10000
#define CPU_MIPS16 16
#define CPU_MIPS32 32
#define CPU_MIPS32_4K 3204113 /* 32, 04, octal 'K'. */
#define CPU_MIPS5 5
#define CPU_MIPS64 64
#define CPU_SB1 12310201 /* octal 'SB', 01. */
/* 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 to test against; and CPU is the CPU specific ISA
to test, or zero if no CPU specific ISA test is desired.
The gp32 arg is set when you need to force 32-bit register usage on
a machine with 64-bit registers; see the documentation under -mgp32
in the MIPS gas docs. */
#define OPCODE_IS_MEMBER(insn, isa, cpu, gp32) \
((((insn)->membership & isa) != 0 \
&& ((insn)->membership & INSN_GP32 ? gp32 : 1)) \
|| (cpu == CPU_R4650 && ((insn)->membership & INSN_4650) != 0) \
|| (cpu == CPU_R4010 && ((insn)->membership & INSN_4010) != 0) \
|| ((cpu == CPU_VR4100 || cpu == CPU_R4111) \
&& ((insn)->membership & INSN_4100) != 0) \
|| (cpu == CPU_R3900 && ((insn)->membership & INSN_3900) != 0))
/* 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,
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,
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_DLA_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_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_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,
M_ULD_A,
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_USD,
M_USD_A,
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_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
/* 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_OP 0x1f
#define MIPS16OP_SH_OP 11
#define MIPS16OP_MASK_IMM11 0x7ff
#define MIPS16OP_SH_IMM11 0
#define MIPS16OP_MASK_RX 0x7
#define MIPS16OP_SH_RX 8
#define MIPS16OP_MASK_IMM8 0xff
#define MIPS16OP_SH_IMM8 0
#define MIPS16OP_MASK_RY 0x7
#define MIPS16OP_SH_RY 5
#define MIPS16OP_MASK_IMM5 0x1f
#define MIPS16OP_SH_IMM5 0
#define MIPS16OP_MASK_RZ 0x7
#define MIPS16OP_SH_RZ 2
#define MIPS16OP_MASK_IMM4 0xf
#define MIPS16OP_SH_IMM4 0
#define MIPS16OP_MASK_REGR32 0x1f
#define MIPS16OP_SH_REGR32 0
#define MIPS16OP_MASK_REG32R 0x1f
#define MIPS16OP_SH_REG32R 3
#define MIPS16OP_EXTRACT_REG32R(i) ((((i) >> 5) & 7) | ((i) & 0x18))
#define MIPS16OP_MASK_MOVE32Z 0x7
#define MIPS16OP_SH_MOVE32Z 0
#define MIPS16OP_MASK_IMM6 0x3f
#define MIPS16OP_SH_IMM6 5
/* 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.
"y" 3 bit register (MIPS16OP_*_RY)
"x" 3 bit register (MIPS16OP_*_RX)
"z" 3 bit register (MIPS16OP_*_RZ)
"Z" 3 bit register (MIPS16OP_*_MOVE32Z)
"v" 3 bit same register as source and destination (MIPS16OP_*_RX)
"w" 3 bit same register as source and destination (MIPS16OP_*_RY)
"0" zero register ($0)
"S" stack pointer ($sp or $29)
"P" program counter
"R" return address register ($ra or $31)
"X" 5 bit MIPS register (MIPS16OP_*_REGR32)
"Y" 5 bit MIPS register (MIPS16OP_*_REG32R)
"6" 6 bit unsigned break code (MIPS16OP_*_IMM6)
"a" 26 bit jump address
"e" 11 bit extension value
"l" register list for entry instruction
"L" register list for exit instruction
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 * 0 (MIPS16OP_*_RZ) (full 5 bit unsigned)
">" 3 bit unsigned shift count * 0 (MIPS16OP_*_RX) (full 5 bit unsigned)
"[" 3 bit unsigned shift count * 0 (MIPS16OP_*_RZ) (full 6 bit unsigned)
"]" 3 bit unsigned shift count * 0 (MIPS16OP_*_RX) (full 6 bit unsigned)
"4" 4 bit signed immediate * 0 (MIPS16OP_*_IMM4) (full 15 bit signed)
"5" 5 bit unsigned immediate * 0 (MIPS16OP_*_IMM5)
"H" 5 bit unsigned immediate * 2 (MIPS16OP_*_IMM5)
"W" 5 bit unsigned immediate * 4 (MIPS16OP_*_IMM5)
"D" 5 bit unsigned immediate * 8 (MIPS16OP_*_IMM5)
"j" 5 bit signed immediate * 0 (MIPS16OP_*_IMM5)
"8" 8 bit unsigned immediate * 0 (MIPS16OP_*_IMM8)
"V" 8 bit unsigned immediate * 4 (MIPS16OP_*_IMM8)
"C" 8 bit unsigned immediate * 8 (MIPS16OP_*_IMM8)
"U" 8 bit unsigned immediate * 0 (MIPS16OP_*_IMM8) (full 16 bit unsigned)
"k" 8 bit signed immediate * 0 (MIPS16OP_*_IMM8)
"K" 8 bit signed immediate * 8 (MIPS16OP_*_IMM8)
"p" 8 bit conditional branch address (MIPS16OP_*_IMM8)
"q" 11 bit branch address (MIPS16OP_*_IMM11)
"A" 8 bit PC relative address * 4 (MIPS16OP_*_IMM8)
"B" 5 bit PC relative address * 8 (MIPS16OP_*_IMM5)
"E" 5 bit PC relative address * 4 (MIPS16OP_*_IMM5)
*/
/* For the mips16, we use the same opcode table format and a few of
the same flags. However, most of the flags are different. */
/* Modifies the register in MIPS16OP_*_RX. */
#define MIPS16_INSN_WRITE_X 0x00000001
/* Modifies the register in MIPS16OP_*_RY. */
#define MIPS16_INSN_WRITE_Y 0x00000002
/* Modifies the register in MIPS16OP_*_RZ. */
#define MIPS16_INSN_WRITE_Z 0x00000004
/* Modifies the T ($24) register. */
#define MIPS16_INSN_WRITE_T 0x00000008
/* Modifies the SP ($29) register. */
#define MIPS16_INSN_WRITE_SP 0x00000010
/* Modifies the RA ($31) register. */
#define MIPS16_INSN_WRITE_31 0x00000020
/* Modifies the general purpose register in MIPS16OP_*_REG32R. */
#define MIPS16_INSN_WRITE_GPR_Y 0x00000040
/* Reads the register in MIPS16OP_*_RX. */
#define MIPS16_INSN_READ_X 0x00000080
/* Reads the register in MIPS16OP_*_RY. */
#define MIPS16_INSN_READ_Y 0x00000100
/* Reads the register in MIPS16OP_*_MOVE32Z. */
#define MIPS16_INSN_READ_Z 0x00000200
/* Reads the T ($24) register. */
#define MIPS16_INSN_READ_T 0x00000400
/* Reads the SP ($29) register. */
#define MIPS16_INSN_READ_SP 0x00000800
/* Reads the RA ($31) register. */
#define MIPS16_INSN_READ_31 0x00001000
/* Reads the program counter. */
#define MIPS16_INSN_READ_PC 0x00002000
/* Reads the general purpose register in MIPS16OP_*_REGR32. */
#define MIPS16_INSN_READ_GPR_X 0x00004000
/* Is a branch insn. */
#define MIPS16_INSN_BRANCH 0x00010000
/* The following flags have the same value for the mips16 opcode
table:
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
INSN_ISA3
*/
extern const struct mips_opcode mips16_opcodes[];
extern const int bfd_mips16_num_opcodes;
#endif /* _MIPS_H_ */
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