include/opcode/or32.h

   1 /* Table of opcodes for the OpenRISC 1000 ISA.
   2    Copyright 2002, 2003 Free Software Foundation, Inc.
   3    Contributed by Damjan Lampret (lampret@opencores.org).
   4
   5    This file is part of or1k_gen_isa, or1ksim, GDB and GAS.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  20
  21 /* We treat all letters the same in encode/decode routines so
  22    we need to assign some characteristics to them like signess etc.  */
  23
  24 #ifndef OR32_H_ISA
  25 #define OR32_H_ISA
  26
  27 #define NUM_UNSIGNED (0)
  28 #define NUM_SIGNED (1)
  29
  30 #define MAX_GPRS 32
  31 #define PAGE_SIZE 4096
  32 #undef __HALF_WORD_INSN__
  33
  34 #define OPERAND_DELIM (',')
  35
  36 #define OR32_IF_DELAY (1)
  37 #define OR32_W_FLAG   (2)
  38 #define OR32_R_FLAG   (4)
  39
  40 struct or32_letter
  41 {
  42   char letter;
  43   int  sign;
  44   /* int  reloc; relocation per letter ??  */
  45 };
  46
  47 /* Main instruction specification array.  */
  48 struct or32_opcode
  49 {
  50   /* Name of the instruction.  */
  51   char *name;
  52
  53   /* A string of characters which describe the operands.
  54      Valid characters are:
  55      ,() Itself.  Characters appears in the assembly code.
  56      rA  Register operand.
  57      rB  Register operand.
  58      rD  Register operand.
  59      I   An immediate operand, range -32768 to 32767.
  60      J   An immediate operand, range . (unused)
  61      K   An immediate operand, range 0 to 65535.
  62      L   An immediate operand, range 0 to 63.
  63      M   An immediate operand, range . (unused)
  64      N   An immediate operand, range -33554432 to 33554431.
  65      O   An immediate operand, range . (unused).  */
  66   char *args;
  67
  68   /* Opcode and operand encoding.  */
  69   char *encoding;
  70   void (*exec) (void);
  71   unsigned int flags;
  72 };
  73
  74 #define OPTYPE_LAST (0x80000000)
  75 #define OPTYPE_OP   (0x40000000)
  76 #define OPTYPE_REG  (0x20000000)
  77 #define OPTYPE_SIG  (0x10000000)
  78 #define OPTYPE_DIS  (0x08000000)
  79 #define OPTYPE_DST  (0x04000000)
  80 #define OPTYPE_SBIT (0x00001F00)
  81 #define OPTYPE_SHR  (0x0000001F)
  82 #define OPTYPE_SBIT_SHR (8)
  83
  84 /* MM: Data how to decode operands.  */
  85 extern struct insn_op_struct
  86 {
  87   unsigned long type;
  88   unsigned long data;
  89 } **op_start;
  90
  91 #ifdef HAS_EXECUTION
  92 extern void l_invalid (void);
  93 extern void l_sfne    (void);
  94 extern void l_bf      (void);
  95 extern void l_add     (void);
  96 extern void l_sw      (void);
  97 extern void l_sb      (void);
  98 extern void l_sh      (void);
  99 extern void l_lwz     (void);
 100 extern void l_lbs     (void);
 101 extern void l_lbz     (void);
 102 extern void l_lhs     (void);
 103 extern void l_lhz     (void);
 104 extern void l_movhi   (void);
 105 extern void l_and     (void);
 106 extern void l_or      (void);
 107 extern void l_xor     (void);
 108 extern void l_sub     (void);
 109 extern void l_mul     (void);
 110 extern void l_div     (void);
 111 extern void l_divu    (void);
 112 extern void l_sll     (void);
 113 extern void l_sra     (void);
 114 extern void l_srl     (void);
 115 extern void l_j       (void);
 116 extern void l_jal     (void);
 117 extern void l_jalr    (void);
 118 extern void l_jr      (void);
 119 extern void l_rfe     (void);
 120 extern void l_nop     (void);
 121 extern void l_bnf     (void);
 122 extern void l_sfeq    (void);
 123 extern void l_sfgts   (void);
 124 extern void l_sfges   (void);
 125 extern void l_sflts   (void);
 126 extern void l_sfles   (void);
 127 extern void l_sfgtu   (void);
 128 extern void l_sfgeu   (void);
 129 extern void l_sfltu   (void);
 130 extern void l_sfleu   (void);
 131 extern void l_mtspr   (void);
 132 extern void l_mfspr   (void);
 133 extern void l_sys     (void);
 134 extern void l_trap    (void); /* CZ 21/06/01.  */
 135 extern void l_macrc   (void);
 136 extern void l_mac     (void);
 137 extern void l_msb     (void);
 138 extern void l_invalid (void);
 139 extern void l_cust1   (void);
 140 extern void l_cust2   (void);
 141 extern void l_cust3   (void);
 142 extern void l_cust4   (void);
 143 #endif
 144 extern void l_none    (void);
 145
 146 extern const struct or32_letter or32_letters[];
 147
 148 extern const struct  or32_opcode or32_opcodes[];
 149
 150 extern const unsigned int or32_num_opcodes;
 151
 152 /* Calculates instruction length in bytes.  Always 4 for OR32.  */
 153 extern int insn_len (int);
 154
 155 /* Is individual insn's operand signed or unsigned?  */
 156 extern int letter_signed (char);
 157
 158 /* Number of letters in the individual lettered operand.  */
 159 extern int letter_range (char);
 160
 161 /* MM: Returns index of given instruction name.  */
 162 extern int insn_index (char *);
 163
 164 /* MM: Returns instruction name from index.  */
 165 extern const char *insn_name (int);
 166
 167 /* MM: Constructs new FSM, based on or32_opcodes.  */
 168 extern void build_automata (void);
 169
 170 /* MM: Destructs FSM.  */
 171 extern void destruct_automata (void);
 172
 173 /* MM: Decodes instruction using FSM.  Call build_automata first.  */
 174 extern int insn_decode (unsigned int);
 175
 176 /* Disassemble one instruction from insn to disassemble.
 177    Return the size of the instruction.  */
 178 int disassemble_insn (unsigned long);
 179
 180 #endif