181 lines
5.2 KiB
C
181 lines
5.2 KiB
C
/* Table of opcodes for the OpenRISC 1000 ISA.
|
|
Copyright 2002, 2003 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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)
|
|
|
|
#define MAX_GPRS 32
|
|
#define PAGE_SIZE 4096
|
|
#undef __HALF_WORD_INSN__
|
|
|
|
#define OPERAND_DELIM (',')
|
|
|
|
#define OR32_IF_DELAY (1)
|
|
#define OR32_W_FLAG (2)
|
|
#define OR32_R_FLAG (4)
|
|
|
|
struct or32_letter
|
|
{
|
|
char letter;
|
|
int sign;
|
|
/* int reloc; relocation per letter ?? */
|
|
};
|
|
|
|
/* 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.
|
|
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;
|
|
void (*exec) (void);
|
|
unsigned int flags;
|
|
};
|
|
|
|
#define OPTYPE_LAST (0x80000000)
|
|
#define OPTYPE_OP (0x40000000)
|
|
#define OPTYPE_REG (0x20000000)
|
|
#define OPTYPE_SIG (0x10000000)
|
|
#define OPTYPE_DIS (0x08000000)
|
|
#define OPTYPE_DST (0x04000000)
|
|
#define OPTYPE_SBIT (0x00001F00)
|
|
#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;
|
|
|
|
#ifdef HAS_EXECUTION
|
|
extern void l_invalid (void);
|
|
extern void l_sfne (void);
|
|
extern void l_bf (void);
|
|
extern void l_add (void);
|
|
extern void l_sw (void);
|
|
extern void l_sb (void);
|
|
extern void l_sh (void);
|
|
extern void l_lwz (void);
|
|
extern void l_lbs (void);
|
|
extern void l_lbz (void);
|
|
extern void l_lhs (void);
|
|
extern void l_lhz (void);
|
|
extern void l_movhi (void);
|
|
extern void l_and (void);
|
|
extern void l_or (void);
|
|
extern void l_xor (void);
|
|
extern void l_sub (void);
|
|
extern void l_mul (void);
|
|
extern void l_div (void);
|
|
extern void l_divu (void);
|
|
extern void l_sll (void);
|
|
extern void l_sra (void);
|
|
extern void l_srl (void);
|
|
extern void l_j (void);
|
|
extern void l_jal (void);
|
|
extern void l_jalr (void);
|
|
extern void l_jr (void);
|
|
extern void l_rfe (void);
|
|
extern void l_nop (void);
|
|
extern void l_bnf (void);
|
|
extern void l_sfeq (void);
|
|
extern void l_sfgts (void);
|
|
extern void l_sfges (void);
|
|
extern void l_sflts (void);
|
|
extern void l_sfles (void);
|
|
extern void l_sfgtu (void);
|
|
extern void l_sfgeu (void);
|
|
extern void l_sfltu (void);
|
|
extern void l_sfleu (void);
|
|
extern void l_mtspr (void);
|
|
extern void l_mfspr (void);
|
|
extern void l_sys (void);
|
|
extern void l_trap (void); /* CZ 21/06/01. */
|
|
extern void l_macrc (void);
|
|
extern void l_mac (void);
|
|
extern void l_msb (void);
|
|
extern void l_invalid (void);
|
|
extern void l_cust1 (void);
|
|
extern void l_cust2 (void);
|
|
extern void l_cust3 (void);
|
|
extern void l_cust4 (void);
|
|
#endif
|
|
extern void l_none (void);
|
|
|
|
extern const struct or32_letter or32_letters[];
|
|
|
|
extern const struct or32_opcode or32_opcodes[];
|
|
|
|
extern const unsigned int or32_num_opcodes;
|
|
|
|
/* Calculates instruction length in bytes. Always 4 for OR32. */
|
|
extern int insn_len (int);
|
|
|
|
/* Is individual insn's operand signed or unsigned? */
|
|
extern int letter_signed (char);
|
|
|
|
/* Number of letters in the individual lettered operand. */
|
|
extern int letter_range (char);
|
|
|
|
/* MM: Returns index of given instruction name. */
|
|
extern int insn_index (char *);
|
|
|
|
/* MM: Returns instruction name from index. */
|
|
extern const char *insn_name (int);
|
|
|
|
/* MM: Constructs new FSM, based on or32_opcodes. */
|
|
extern void build_automata (void);
|
|
|
|
/* MM: Destructs FSM. */
|
|
extern void destruct_automata (void);
|
|
|
|
/* MM: Decodes instruction using FSM. Call build_automata first. */
|
|
extern int insn_decode (unsigned int);
|
|
|
|
/* Disassemble one instruction from insn to disassemble.
|
|
Return the size of the instruction. */
|
|
int disassemble_insn (unsigned long);
|
|
|
|
#endif
|