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[/] [or1k/] [tags/] [nog_patch_60/] [or1ksim/] [cpu/] [or1k/] [opcode/] [or32.h] - Rev 1765
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/* Table of opcodes for the OpenRISC 1000 ISA. Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc. Contributed by Damjan Lampret (lampret@opencores.org). This file is part of or1k_gen_isa, or1ksim, GDB and GAS. This program 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 2 of the License, or (at your option) any later version. This program 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 this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* We treat all letters the same in encode/decode routines so we need to assign some characteristics to them like signess etc.*/ #ifndef OR32_H_ISA #define OR32_H_ISA #define NUM_UNSIGNED (0) #define NUM_SIGNED (1) #ifndef PARAMS #define PARAMS(x) x #endif #ifndef CONST #define CONST const #endif #define MAX_GPRS 32 #define PAGE_SIZE 8192 #undef __HALF_WORD_INSN__ #define OPERAND_DELIM (',') #define OR32_IF_DELAY (1) #define OR32_W_FLAG (2) #define OR32_R_FLAG (4) #if defined(HAS_EXECUTION) # if SIMPLE_EXECUTION # include "simpl32_defs.h" # else extern void l_none PARAMS((void)); # endif #else extern void l_none PARAMS((void)); #endif struct or32_letter { char letter; int sign; /* int reloc; relocation per letter ??*/ }; enum insn_type { it_unknown, it_exception, it_arith, it_shift, it_compare, it_branch, it_jump, it_load, it_store, it_movimm, it_move, it_extend, it_nop, it_mac, it_float }; /* Main instruction specification array. */ struct or32_opcode { /* Name of the instruction. */ char *name; /* A string of characters which describe the operands. Valid characters are: ,() Itself. Characters appears in the assembly code. rA Register operand. rB Register operand. rD Register operand (destination). I An immediate operand, range -32768 to 32767. J An immediate operand, range . (unused) K An immediate operand, range 0 to 65535. L An immediate operand, range 0 to 63. M An immediate operand, range . (unused) N An immediate operand, range -33554432 to 33554431. O An immediate operand, range . (unused) */ char *args; /* Opcode and operand encoding. */ char *encoding; #ifdef HAS_EXECUTION # if !SIMPLE_EXECUTION char *function_name; # else /* !SIMPLE_EXECUTION */ void (*exec)(struct iqueue_entry *); # endif #else /* HAS_EXECUTION */ void (*exec)(void); #endif unsigned int flags; enum insn_type func_unit; }; /* This operand is the last in the list */ #define OPTYPE_LAST (0x80000000) /* This operand marks the end of the operand sequence (for things like I(rD)) */ #define OPTYPE_OP (0x40000000) /* The operand specifies a register index */ #define OPTYPE_REG (0x20000000) /* The operand must be sign extended */ #define OPTYPE_SIG (0x10000000) /* Operand is a relative address, the `I' in `I(rD)' */ #define OPTYPE_DIS (0x08000000) /* The operand is a destination */ #define OPTYPE_DST (0x04000000) /* Which bit of the operand is the sign bit */ #define OPTYPE_SBIT (0x00001F00) /* Amount to shift the instruction word right to get the operand */ #define OPTYPE_SHR (0x0000001F) #define OPTYPE_SBIT_SHR (8) /* MM: Data how to decode operands. */ extern struct insn_op_struct { unsigned long type; unsigned long data; } **op_start; /* Leaf flag used in automata building */ #define LEAF_FLAG (0x80000000) struct temp_insn_struct { unsigned long insn; unsigned long insn_mask; int in_pass; }; extern unsigned long *automata; extern struct temp_insn_struct *ti; extern CONST struct or32_letter or32_letters[]; extern CONST struct or32_opcode or32_opcodes[]; extern CONST int num_opcodes; /* Calculates instruction length in bytes. Always 4 for OR32. */ extern int insn_len PARAMS((int insn_index)); /* Is individual insn's operand signed or unsigned? */ extern int letter_signed PARAMS((char l)); /* Number of letters in the individual lettered operand. */ extern int letter_range PARAMS((char l)); /* MM: Returns index of given instruction name. */ extern int insn_index PARAMS((char *insn)); /* MM: Returns instruction name from index. */ extern CONST char *insn_name PARAMS ((int index)); /* MM: Constructs new FSM, based on or32_opcodes. */ extern void build_automata PARAMS ((void)); /* MM: Destructs FSM. */ extern void destruct_automata PARAMS ((void)); /* MM: Decodes instruction using FSM. Call build_automata first. */ extern int insn_decode PARAMS((unsigned int insn)); /* Disassemble one instruction from insn to disassemble. Return the size of the instruction. */ int disassemble_insn (unsigned long insn); /* Disassemble one instruction from insn index. Return the size of the instruction. */ int disassemble_index (unsigned long insn, int index); /* FOR INTERNAL USE ONLY */ /* Automatically does zero- or sign- extension and also finds correct sign bit position if sign extension is correct extension. Which extension is proper is figured out from letter description. */ unsigned long extend_imm(unsigned long imm, char l); /* Extracts value from opcode */ unsigned long or32_extract(char param_ch, char *enc_initial, unsigned long insn); #endif