0,0 → 1,522 |
/* Nios II opcode list for GAS, the GNU assembler. |
Copyright (C) 2012, 2013 Free Software Foundation, Inc. |
Contributed by Nigel Gray (ngray@altera.com). |
Contributed by Mentor Graphics, Inc. |
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This file is part of GAS, the GNU Assembler, and GDB, the GNU disassembler. |
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GAS/GDB is free software; you can redistribute it and/or modify |
it under the terms of the GNU General Public License as published by |
the Free Software Foundation; either version 3, or (at your option) |
any later version. |
|
GAS/GDB is distributed in the hope that it will be useful, |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
GNU General Public License for more details. |
|
You should have received a copy of the GNU General Public License |
along with GAS or GDB; see the file COPYING3. If not, write to |
the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
Boston, MA 02110-1301, USA. */ |
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#ifndef _NIOS2_H_ |
#define _NIOS2_H_ |
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#include "bfd.h" |
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/**************************************************************************** |
* This file contains structures, bit masks and shift counts used |
* by the GNU toolchain to define the Nios II instruction set and |
* access various opcode fields. |
****************************************************************************/ |
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/* Identify different overflow situations for error messages. */ |
enum overflow_type |
{ |
call_target_overflow = 0, |
branch_target_overflow, |
address_offset_overflow, |
signed_immed16_overflow, |
unsigned_immed16_overflow, |
unsigned_immed5_overflow, |
custom_opcode_overflow, |
no_overflow |
}; |
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/* This structure holds information for a particular instruction. |
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The args field is a string describing the operands. The following |
letters can appear in the args: |
c - a 5-bit control register index |
d - a 5-bit destination register index |
s - a 5-bit left source register index |
t - a 5-bit right source register index |
i - a 16-bit signed immediate |
u - a 16-bit unsigned immediate |
o - a 16-bit signed program counter relative offset |
j - a 5-bit unsigned immediate |
b - a 5-bit break instruction constant |
l - a 8-bit custom instruction constant |
m - a 26-bit unsigned immediate |
Literal ',', '(', and ')' characters may also appear in the args as |
delimiters. |
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The pinfo field is INSN_MACRO for a macro. Otherwise, it is a collection |
of bits describing the instruction, notably any relevant hazard |
information. |
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When assembling, the match field contains the opcode template, which |
is modified by the arguments to produce the actual opcode |
that is emitted. If pinfo is INSN_MACRO, then this is 0. |
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If pinfo is INSN_MACRO, the mask field stores the macro identifier. |
Otherwise 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. */ |
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struct nios2_opcode |
{ |
const char *name; /* The name of the instruction. */ |
const char *args; /* A string describing the arguments for this |
instruction. */ |
const char *args_test; /* Like args, but with an extra argument for |
the expected opcode. */ |
unsigned long num_args; /* The number of arguments the instruction |
takes. */ |
unsigned long match; /* The basic opcode for the instruction. */ |
unsigned long mask; /* Mask for the opcode field of the |
instruction. */ |
unsigned long pinfo; /* Is this a real instruction or instruction |
macro? */ |
enum overflow_type overflow_msg; /* Used to generate informative |
message when fixup overflows. */ |
}; |
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/* This value is used in the nios2_opcode.pinfo field to indicate that the |
instruction is a macro or pseudo-op. This requires special treatment by |
the assembler, and is used by the disassembler to determine whether to |
check for a nop. */ |
#define NIOS2_INSN_MACRO 0x80000000 |
#define NIOS2_INSN_MACRO_MOV 0x80000001 |
#define NIOS2_INSN_MACRO_MOVI 0x80000002 |
#define NIOS2_INSN_MACRO_MOVIA 0x80000004 |
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#define NIOS2_INSN_RELAXABLE 0x40000000 |
#define NIOS2_INSN_UBRANCH 0x00000010 |
#define NIOS2_INSN_CBRANCH 0x00000020 |
#define NIOS2_INSN_CALL 0x00000040 |
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#define NIOS2_INSN_ADDI 0x00000080 |
#define NIOS2_INSN_ANDI 0x00000100 |
#define NIOS2_INSN_ORI 0x00000200 |
#define NIOS2_INSN_XORI 0x00000400 |
|
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/* Associates a register name ($6) with a 5-bit index (eg 6). */ |
struct nios2_reg |
{ |
const char *name; |
const int index; |
}; |
|
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/* These are bit masks and shift counts for accessing the various |
fields of a Nios II instruction. */ |
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/* Macros for getting and setting an instruction field. */ |
#define GET_INSN_FIELD(X, i) \ |
(((i) & OP_MASK_##X) >> OP_SH_##X) |
#define SET_INSN_FIELD(X, i, j) \ |
((i) = (((i) & ~OP_MASK_##X) | (((j) << OP_SH_##X) & OP_MASK_##X))) |
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/* Instruction field definitions. */ |
#define IW_A_LSB 27 |
#define IW_A_MSB 31 |
#define IW_A_SZ 5 |
#define IW_A_MASK 0x1f |
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#define IW_B_LSB 22 |
#define IW_B_MSB 26 |
#define IW_B_SZ 5 |
#define IW_B_MASK 0x1f |
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#define IW_C_LSB 17 |
#define IW_C_MSB 21 |
#define IW_C_SZ 5 |
#define IW_C_MASK 0x1f |
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#define IW_IMM16_LSB 6 |
#define IW_IMM16_MSB 21 |
#define IW_IMM16_SZ 16 |
#define IW_IMM16_MASK 0xffff |
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#define IW_IMM26_LSB 6 |
#define IW_IMM26_MSB 31 |
#define IW_IMM26_SZ 26 |
#define IW_IMM26_MASK 0x3ffffff |
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#define IW_OP_LSB 0 |
#define IW_OP_MSB 5 |
#define IW_OP_SZ 6 |
#define IW_OP_MASK 0x3f |
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#define IW_OPX_LSB 11 |
#define IW_OPX_MSB 16 |
#define IW_OPX_SZ 6 |
#define IW_OPX_MASK 0x3f |
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#define IW_SHIFT_IMM5_LSB 6 |
#define IW_SHIFT_IMM5_MSB 10 |
#define IW_SHIFT_IMM5_SZ 5 |
#define IW_SHIFT_IMM5_MASK 0x1f |
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#define IW_CONTROL_REGNUM_LSB 6 |
#define IW_CONTROL_REGNUM_MSB 9 |
#define IW_CONTROL_REGNUM_SZ 4 |
#define IW_CONTROL_REGNUM_MASK 0xf |
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/* Operator mask and shift. */ |
#define OP_MASK_OP (IW_OP_MASK << IW_OP_LSB) |
#define OP_SH_OP IW_OP_LSB |
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/* Masks and shifts for I-type instructions. */ |
#define OP_MASK_IOP (IW_OP_MASK << IW_OP_LSB) |
#define OP_SH_IOP IW_OP_LSB |
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#define OP_MASK_IMM16 (IW_IMM16_MASK << IW_IMM16_LSB) |
#define OP_SH_IMM16 IW_IMM16_LSB |
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#define OP_MASK_IRD (IW_B_MASK << IW_B_LSB) |
#define OP_SH_IRD IW_B_LSB /* The same as T for I-type. */ |
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#define OP_MASK_IRT (IW_B_MASK << IW_B_LSB) |
#define OP_SH_IRT IW_B_LSB |
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#define OP_MASK_IRS (IW_A_MASK << IW_A_LSB) |
#define OP_SH_IRS IW_A_LSB |
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/* Masks and shifts for R-type instructions. */ |
#define OP_MASK_ROP (IW_OP_MASK << IW_OP_LSB) |
#define OP_SH_ROP IW_OP_LSB |
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#define OP_MASK_ROPX (IW_OPX_MASK << IW_OPX_LSB) |
#define OP_SH_ROPX IW_OPX_LSB |
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#define OP_MASK_RRD (IW_C_MASK << IW_C_LSB) |
#define OP_SH_RRD IW_C_LSB |
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#define OP_MASK_RRT (IW_B_MASK << IW_B_LSB) |
#define OP_SH_RRT IW_B_LSB |
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#define OP_MASK_RRS (IW_A_MASK << IW_A_LSB) |
#define OP_SH_RRS IW_A_LSB |
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/* Masks and shifts for J-type instructions. */ |
#define OP_MASK_JOP (IW_OP_MASK << IW_OP_LSB) |
#define OP_SH_JOP IW_OP_LSB |
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#define OP_MASK_IMM26 (IW_IMM26_MASK << IW_IMM26_LSB) |
#define OP_SH_IMM26 IW_IMM26_LSB |
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/* Masks and shifts for CTL instructions. */ |
#define OP_MASK_RCTL 0x000007c0 |
#define OP_SH_RCTL 6 |
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/* Break instruction imm5 field. */ |
#define OP_MASK_TRAP_IMM5 0x000007c0 |
#define OP_SH_TRAP_IMM5 6 |
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/* Instruction imm5 field. */ |
#define OP_MASK_IMM5 (IW_SHIFT_IMM5_MASK << IW_SHIFT_IMM5_LSB) |
#define OP_SH_IMM5 IW_SHIFT_IMM5_LSB |
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/* Cache operation fields (type j,i(s)). */ |
#define OP_MASK_CACHE_OPX (IW_B_MASK << IW_B_LSB) |
#define OP_SH_CACHE_OPX IW_B_LSB |
#define OP_MASK_CACHE_RRS (IW_A_MASK << IW_A_LSB) |
#define OP_SH_CACHE_RRS IW_A_LSB |
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/* Custom instruction masks. */ |
#define OP_MASK_CUSTOM_A 0x00010000 |
#define OP_SH_CUSTOM_A 16 |
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#define OP_MASK_CUSTOM_B 0x00008000 |
#define OP_SH_CUSTOM_B 15 |
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#define OP_MASK_CUSTOM_C 0x00004000 |
#define OP_SH_CUSTOM_C 14 |
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#define OP_MASK_CUSTOM_N 0x00003fc0 |
#define OP_SH_CUSTOM_N 6 |
#define OP_MAX_CUSTOM_N 255 |
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/* OP instruction values. */ |
#define OP_ADDI 4 |
#define OP_ANDHI 44 |
#define OP_ANDI 12 |
#define OP_BEQ 38 |
#define OP_BGE 14 |
#define OP_BGEU 46 |
#define OP_BLT 22 |
#define OP_BLTU 54 |
#define OP_BNE 30 |
#define OP_BR 6 |
#define OP_CALL 0 |
#define OP_CMPEQI 32 |
#define OP_CMPGEI 8 |
#define OP_CMPGEUI 40 |
#define OP_CMPLTI 16 |
#define OP_CMPLTUI 48 |
#define OP_CMPNEI 24 |
#define OP_CUSTOM 50 |
#define OP_FLUSHD 59 |
#define OP_FLUSHDA 27 |
#define OP_INITD 51 |
#define OP_INITDA 19 |
#define OP_JMPI 1 |
#define OP_LDB 7 |
#define OP_LDBIO 39 |
#define OP_LDBU 3 |
#define OP_LDBUIO 35 |
#define OP_LDH 15 |
#define OP_LDHIO 47 |
#define OP_LDHU 11 |
#define OP_LDHUIO 43 |
#define OP_LDL 31 |
#define OP_LDW 23 |
#define OP_LDWIO 55 |
#define OP_MULI 36 |
#define OP_OPX 58 |
#define OP_ORHI 52 |
#define OP_ORI 20 |
#define OP_RDPRS 56 |
#define OP_STB 5 |
#define OP_STBIO 37 |
#define OP_STC 29 |
#define OP_STH 13 |
#define OP_STHIO 45 |
#define OP_STW 21 |
#define OP_STWIO 53 |
#define OP_XORHI 60 |
#define OP_XORI 28 |
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/* OPX instruction values. */ |
#define OPX_ADD 49 |
#define OPX_AND 14 |
#define OPX_BREAK 52 |
#define OPX_BRET 9 |
#define OPX_CALLR 29 |
#define OPX_CMPEQ 32 |
#define OPX_CMPGE 8 |
#define OPX_CMPGEU 40 |
#define OPX_CMPLT 16 |
#define OPX_CMPLTU 48 |
#define OPX_CMPNE 24 |
#define OPX_CRST 62 |
#define OPX_DIV 37 |
#define OPX_DIVU 36 |
#define OPX_ERET 1 |
#define OPX_FLUSHI 12 |
#define OPX_FLUSHP 4 |
#define OPX_HBREAK 53 |
#define OPX_INITI 41 |
#define OPX_INTR 61 |
#define OPX_JMP 13 |
#define OPX_MUL 39 |
#define OPX_MULXSS 31 |
#define OPX_MULXSU 23 |
#define OPX_MULXUU 7 |
#define OPX_NEXTPC 28 |
#define OPX_NOR 6 |
#define OPX_OR 22 |
#define OPX_RDCTL 38 |
#define OPX_RET 5 |
#define OPX_ROL 3 |
#define OPX_ROLI 2 |
#define OPX_ROR 11 |
#define OPX_SLL 19 |
#define OPX_SLLI 18 |
#define OPX_SRA 59 |
#define OPX_SRAI 58 |
#define OPX_SRL 27 |
#define OPX_SRLI 26 |
#define OPX_SUB 57 |
#define OPX_SYNC 54 |
#define OPX_TRAP 45 |
#define OPX_WRCTL 46 |
#define OPX_WRPRS 20 |
#define OPX_XOR 30 |
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/* The following macros define the opcode matches for each |
instruction code & OP_MASK_INST == OP_MATCH_INST. */ |
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/* OP instruction matches. */ |
#define OP_MATCH_ADDI OP_ADDI |
#define OP_MATCH_ANDHI OP_ANDHI |
#define OP_MATCH_ANDI OP_ANDI |
#define OP_MATCH_BEQ OP_BEQ |
#define OP_MATCH_BGE OP_BGE |
#define OP_MATCH_BGEU OP_BGEU |
#define OP_MATCH_BLT OP_BLT |
#define OP_MATCH_BLTU OP_BLTU |
#define OP_MATCH_BNE OP_BNE |
#define OP_MATCH_BR OP_BR |
#define OP_MATCH_FLUSHD OP_FLUSHD |
#define OP_MATCH_FLUSHDA OP_FLUSHDA |
#define OP_MATCH_INITD OP_INITD |
#define OP_MATCH_INITDA OP_INITDA |
#define OP_MATCH_CALL OP_CALL |
#define OP_MATCH_CMPEQI OP_CMPEQI |
#define OP_MATCH_CMPGEI OP_CMPGEI |
#define OP_MATCH_CMPGEUI OP_CMPGEUI |
#define OP_MATCH_CMPLTI OP_CMPLTI |
#define OP_MATCH_CMPLTUI OP_CMPLTUI |
#define OP_MATCH_CMPNEI OP_CMPNEI |
#define OP_MATCH_JMPI OP_JMPI |
#define OP_MATCH_LDB OP_LDB |
#define OP_MATCH_LDBIO OP_LDBIO |
#define OP_MATCH_LDBU OP_LDBU |
#define OP_MATCH_LDBUIO OP_LDBUIO |
#define OP_MATCH_LDH OP_LDH |
#define OP_MATCH_LDHIO OP_LDHIO |
#define OP_MATCH_LDHU OP_LDHU |
#define OP_MATCH_LDHUIO OP_LDHUIO |
#define OP_MATCH_LDL OP_LDL |
#define OP_MATCH_LDW OP_LDW |
#define OP_MATCH_LDWIO OP_LDWIO |
#define OP_MATCH_MULI OP_MULI |
#define OP_MATCH_OPX OP_OPX |
#define OP_MATCH_ORHI OP_ORHI |
#define OP_MATCH_ORI OP_ORI |
#define OP_MATCH_RDPRS OP_RDPRS |
#define OP_MATCH_STB OP_STB |
#define OP_MATCH_STBIO OP_STBIO |
#define OP_MATCH_STC OP_STC |
#define OP_MATCH_STH OP_STH |
#define OP_MATCH_STHIO OP_STHIO |
#define OP_MATCH_STW OP_STW |
#define OP_MATCH_STWIO OP_STWIO |
#define OP_MATCH_CUSTOM OP_CUSTOM |
#define OP_MATCH_XORHI OP_XORHI |
#define OP_MATCH_XORI OP_XORI |
#define OP_MATCH_OPX OP_OPX |
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/* OPX instruction values. */ |
#define OPX_MATCH(code) ((code << IW_OPX_LSB) | OP_OPX) |
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#define OP_MATCH_ADD OPX_MATCH (OPX_ADD) |
#define OP_MATCH_AND OPX_MATCH (OPX_AND) |
#define OP_MATCH_BREAK ((0x1e << 17) | OPX_MATCH (OPX_BREAK)) |
#define OP_MATCH_BRET (0xf0000000 | OPX_MATCH (OPX_BRET)) |
#define OP_MATCH_CALLR ((0x1f << 17) | OPX_MATCH (OPX_CALLR)) |
#define OP_MATCH_CMPEQ OPX_MATCH (OPX_CMPEQ) |
#define OP_MATCH_CMPGE OPX_MATCH (OPX_CMPGE) |
#define OP_MATCH_CMPGEU OPX_MATCH (OPX_CMPGEU) |
#define OP_MATCH_CMPLT OPX_MATCH (OPX_CMPLT) |
#define OP_MATCH_CMPLTU OPX_MATCH (OPX_CMPLTU) |
#define OP_MATCH_CMPNE OPX_MATCH (OPX_CMPNE) |
#define OP_MATCH_DIV OPX_MATCH (OPX_DIV) |
#define OP_MATCH_DIVU OPX_MATCH (OPX_DIVU) |
#define OP_MATCH_JMP OPX_MATCH (OPX_JMP) |
#define OP_MATCH_MUL OPX_MATCH (OPX_MUL) |
#define OP_MATCH_MULXSS OPX_MATCH (OPX_MULXSS) |
#define OP_MATCH_MULXSU OPX_MATCH (OPX_MULXSU) |
#define OP_MATCH_MULXUU OPX_MATCH (OPX_MULXUU) |
#define OP_MATCH_NEXTPC OPX_MATCH (OPX_NEXTPC) |
#define OP_MATCH_NOR OPX_MATCH (OPX_NOR) |
#define OP_MATCH_OR OPX_MATCH (OPX_OR) |
#define OP_MATCH_RDCTL OPX_MATCH (OPX_RDCTL) |
#define OP_MATCH_RET (0xf8000000 | OPX_MATCH (OPX_RET)) |
#define OP_MATCH_ROL OPX_MATCH (OPX_ROL) |
#define OP_MATCH_ROLI OPX_MATCH (OPX_ROLI) |
#define OP_MATCH_ROR OPX_MATCH (OPX_ROR) |
#define OP_MATCH_SLL OPX_MATCH (OPX_SLL) |
#define OP_MATCH_SLLI OPX_MATCH (OPX_SLLI) |
#define OP_MATCH_SRA OPX_MATCH (OPX_SRA) |
#define OP_MATCH_SRAI OPX_MATCH (OPX_SRAI) |
#define OP_MATCH_SRL OPX_MATCH (OPX_SRL) |
#define OP_MATCH_SRLI OPX_MATCH (OPX_SRLI) |
#define OP_MATCH_SUB OPX_MATCH (OPX_SUB) |
#define OP_MATCH_SYNC OPX_MATCH (OPX_SYNC) |
#define OP_MATCH_TRAP ((0x1d << 17) | OPX_MATCH (OPX_TRAP)) |
#define OP_MATCH_ERET (0xef800000 | OPX_MATCH (OPX_ERET)) |
#define OP_MATCH_WRCTL OPX_MATCH (OPX_WRCTL) |
#define OP_MATCH_WRPRS OPX_MATCH (OPX_WRPRS) |
#define OP_MATCH_XOR OPX_MATCH (OPX_XOR) |
#define OP_MATCH_FLUSHI OPX_MATCH (OPX_FLUSHI) |
#define OP_MATCH_FLUSHP OPX_MATCH (OPX_FLUSHP) |
#define OP_MATCH_INITI OPX_MATCH (OPX_INITI) |
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/* Some unusual op masks. */ |
#define OP_MASK_BREAK ((OP_MASK_RRS | OP_MASK_RRT | OP_MASK_RRD \ |
| OP_MASK_ROPX | OP_MASK_OP) \ |
& 0xfffff03f) |
#define OP_MASK_CALLR ((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \ |
| OP_MASK_OP)) |
#define OP_MASK_JMP ((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \ |
| OP_MASK_OP)) |
#define OP_MASK_SYNC ((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \ |
| OP_MASK_OP)) |
#define OP_MASK_TRAP ((OP_MASK_RRS | OP_MASK_RRT | OP_MASK_RRD \ |
| OP_MASK_ROPX | OP_MASK_OP) \ |
& 0xfffff83f) |
#define OP_MASK_WRCTL ((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \ |
| OP_MASK_OP)) /*& 0xfffff83f */ |
#define OP_MASK_NEXTPC ((OP_MASK_RRS | OP_MASK_RRT | OP_MASK_ROPX \ |
| OP_MASK_OP)) |
#define OP_MASK_FLUSHI ((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \ |
| OP_MASK_OP)) |
#define OP_MASK_INITI ((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \ |
| OP_MASK_OP)) |
|
#define OP_MASK_ROLI ((OP_MASK_RRT | OP_MASK_ROPX | OP_MASK_OP)) |
#define OP_MASK_SLLI ((OP_MASK_RRT | OP_MASK_ROPX | OP_MASK_OP)) |
#define OP_MASK_SRAI ((OP_MASK_RRT | OP_MASK_ROPX | OP_MASK_OP)) |
#define OP_MASK_SRLI ((OP_MASK_RRT | OP_MASK_ROPX | OP_MASK_OP)) |
#define OP_MASK_RDCTL ((OP_MASK_RRS | OP_MASK_RRT | OP_MASK_ROPX \ |
| OP_MASK_OP)) /*& 0xfffff83f */ |
|
#ifndef OP_MASK |
#define OP_MASK 0xffffffff |
#endif |
|
/* These convenience macros to extract instruction fields are used by GDB. */ |
#define GET_IW_A(Iw) \ |
(((Iw) >> IW_A_LSB) & IW_A_MASK) |
#define GET_IW_B(Iw) \ |
(((Iw) >> IW_B_LSB) & IW_B_MASK) |
#define GET_IW_C(Iw) \ |
(((Iw) >> IW_C_LSB) & IW_C_MASK) |
#define GET_IW_CONTROL_REGNUM(Iw) \ |
(((Iw) >> IW_CONTROL_REGNUM_LSB) & IW_CONTROL_REGNUM_MASK) |
#define GET_IW_IMM16(Iw) \ |
(((Iw) >> IW_IMM16_LSB) & IW_IMM16_MASK) |
#define GET_IW_IMM26(Iw) \ |
(((Iw) >> IW_IMM26_LSB) & IW_IMM26_MASK) |
#define GET_IW_OP(Iw) \ |
(((Iw) >> IW_OP_LSB) & IW_OP_MASK) |
#define GET_IW_OPX(Iw) \ |
(((Iw) >> IW_OPX_LSB) & IW_OPX_MASK) |
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/* These are the data structures we use to hold the instruction information. */ |
extern const struct nios2_opcode nios2_builtin_opcodes[]; |
extern const int bfd_nios2_num_builtin_opcodes; |
extern struct nios2_opcode *nios2_opcodes; |
extern int bfd_nios2_num_opcodes; |
|
/* These are the data structures used to hold the register information. */ |
extern const struct nios2_reg nios2_builtin_regs[]; |
extern struct nios2_reg *nios2_regs; |
extern const int nios2_num_builtin_regs; |
extern int nios2_num_regs; |
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/* Machine-independent macro for number of opcodes. */ |
#define NUMOPCODES bfd_nios2_num_opcodes |
#define NUMREGISTERS nios2_num_regs; |
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/* This is made extern so that the assembler can use it to find out |
what instruction caused an error. */ |
extern const struct nios2_opcode *nios2_find_opcode_hash (unsigned long); |
|
#endif /* _NIOS2_H */ |