301 lines
11 KiB
C
301 lines
11 KiB
C
/*
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* Copyright (c) 1987 Fujitsu
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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operandDefs_68000.h -- Define operand types and flag bits for 68000.
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Chip Morningstar -- Lucasfilm Ltd.
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25-April-1985
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*/
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typedef enum {
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EXPRESSION_OPND, STRING_OPND, BLOCK_OPND, D_REGISTER_OPND,
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A_REGISTER_OPND, A_REGISTER_INDIRECT_OPND, POSTINCREMENT_OPND,
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PREDECREMENT_OPND, DISPLACEMENT_OPND, INDEXED_OPND,
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PC_DISPLACEMENT_OPND, PC_INDEXED_OPND, IMMEDIATE_OPND,
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ABSOLUTE_SHORT_OPND, ABSOLUTE_LONG_OPND, CC_REGISTER_OPND,
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STATUS_REGISTER_OPND, USP_REGISTER_OPND,
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CONTROL_REGISTER_OPND, SELECTED_OPND, INDEX_SELECTED_OPND,
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} operandKindType;
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/*** Hack warning ***/
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/* We know that enumerated types are actually just ints. Some of the address
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modes require some additional information in the form of one or two
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register numbers. We want to still encode this information in one int.
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Therefor, we are going to OR some bits representing the register into the
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higher-order bits of the type word, thus violating the principle of
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enumerated types (it's just that the 'enum' syntax above is so much cleaner
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than a bunch of '#define's) */
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#define getRegisterField(op, n) ((((int)op)>>(8+(n-1)*4)) & 0xF)
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#define setRegisterField(op, n, r) (op=((int)op | \
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(((r)&0xF)<<(8+((n)-1)*4))))
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#define getAddressRegister(op) (getRegisterField(op, 1) - 8)
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#define getDataRegister(op) getRegisterField(op, 1)
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#define getRegister(op) getRegisterField(op, 1)
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#define getIndexRegister(op) getRegisterField(op, 2)
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#define getWL(op) (((int)op >> 16) & 1)
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#define setAddressRegister(op, r) setRegisterField(op, 1, (int)r + 8)
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#define setDataRegister(op, r) setRegisterField(op, 1, (int)r)
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#define setRegister(op, r) setRegisterField(op, 1, (int)r)
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#define setIndexRegister(op, r) setRegisterField(op, 2, (int)r)
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#define setWL(op, wl) (op = ((int)op | (((wl) & 1) << 16)))
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#define operandKindField(op) (operandKindType)((int)op & 0xFF)
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/* Opcodes: */
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/* In the opcode table we want to have information that tells which possible
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address modes the corresponding instruction can utilize. The
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instruction set of the 68000 breaks up into classes of instructions, such
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that all of the instructions in a class accept the same address modes.
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We encode the instructions by class and the classes by permissible address
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modes. This helps us reduce errors in construction of the opcode table,
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since getting one instruction of a given class right means getting all the
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others right too. Ordinarily we'd give each class a nice mnemonic name,
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but the 68000 has 26 idiosyncratic classes and a unique name for each
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would confuse more than it would help. */
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typedef enum {
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CLASS_I, CLASS_II, CLASS_III, CLASS_IV, CLASS_V, CLASS_VI,
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CLASS_VII, CLASS_VIII, CLASS_IX, CLASS_X, CLASS_XI, CLASS_XII,
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CLASS_XIII, CLASS_XIV, CLASS_XV, CLASS_XVI, CLASS_XVII,
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CLASS_XVIII, CLASS_XIX, CLASS_XX, CLASS_XXI, CLASS_XXII,
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CLASS_XXIII, CLASS_XXIV, CLASS_XXV, CLASS_XXVI, CLASS_XXVII,
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CLASS_XXVIII,
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} addressClassType;
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/* The various address modes as required by the various instructions manage to
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sort themselves into a number of independent groups. We will give these
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groups names to facilitate operand address mode checking */
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#define NO_OPND_BIT 0x000000
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#define EXPRESSION_OPND_BIT 0x000001
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#define STRING_OPND_BIT 0x000002
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#define BLOCK_OPND_BIT 0x000004
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#define D_REGISTER_OPND_BIT 0x000008
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#define A_REGISTER_OPND_BIT 0x000010
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#define A_REGISTER_INDIRECT_OPND_BIT 0x000020
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#define POSTINCREMENT_OPND_BIT 0x000040
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#define PREDECREMENT_OPND_BIT 0x000080
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#define DISPLACEMENT_OPND_BIT 0x000100
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#define INDEXED_OPND_BIT 0x000200
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#define PC_DISPLACEMENT_OPND_BIT 0x000400
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#define PC_INDEXED_OPND_BIT 0x000800
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#define IMMEDIATE_OPND_BIT 0x001000
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#define ABSOLUTE_SHORT_OPND_BIT 0x002000
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#define ABSOLUTE_LONG_OPND_BIT 0x004000
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#define CC_REGISTER_OPND_BIT 0x008000
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#define STATUS_REGISTER_OPND_BIT 0x010000
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#define USP_REGISTER_OPND_BIT 0x020000
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#define CONTROL_REGISTER_OPND_BIT 0x040000
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#define SELECTED_OPND_BIT 0x080000
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#define INDEX_SELECTED_OPND_BIT 0x100000
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#define ANY_OPND_BITS 0xFFFFFF
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#define D_REGISTER_GROUP_BITS D_REGISTER_OPND_BIT
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#define GROUP_A D_REGISTER_GROUP_BITS
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#define A_REGISTER_GROUP_BITS A_REGISTER_OPND_BIT
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#define GROUP_B A_REGISTER_GROUP_BITS
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#define POSTINCREMENT_GROUP_BITS POSTINCREMENT_OPND_BIT
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#define GROUP_C POSTINCREMENT_GROUP_BITS
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#define PREDECREMENT_GROUP_BITS PREDECREMENT_OPND_BIT
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#define GROUP_D PREDECREMENT_GROUP_BITS
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#define DISPLACEMENT_GROUP_BITS (DISPLACEMENT_OPND_BIT | \
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SELECTED_OPND_BIT)
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#define GROUP_E DISPLACEMENT_GROUP_BITS
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#define IMMEDIATE_GROUP_BITS IMMEDIATE_OPND_BIT
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#define GROUP_F IMMEDIATE_GROUP_BITS
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#define NORMAL_GROUP_BITS EXPRESSION_OPND_BIT
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#define GROUP_G NORMAL_GROUP_BITS
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#define CC_REGISTER_GROUP_BITS CC_REGISTER_OPND_BIT
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#define GROUP_H CC_REGISTER_GROUP_BITS
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#define STATUS_REGISTER_GROUP_BITS STATUS_REGISTER_OPND_BIT
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#define GROUP_I STATUS_REGISTER_GROUP_BITS
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#define IMPLIED_GROUP_BITS NO_OPND_BIT
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#define GROUP_J IMPLIED_GROUP_BITS
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#define USP_REGISTER_GROUP_BITS USP_REGISTER_OPND_BIT
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#define GROUP_K USP_REGISTER_GROUP_BITS
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#define CONTROL_REGISTER_GROUP_BITS (USP_REGISTER_OPND_BIT | \
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CONTROL_REGISTER_OPND_BIT)
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#define GROUP_L CONTROL_REGISTER_GROUP_BITS
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#define REGISTER_GROUP_BITS (D_REGISTER_OPND_BIT | \
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A_REGISTER_OPND_BIT)
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#define GROUP_M REGISTER_GROUP_BITS
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#define STORABLE_GROUP_BITS (D_REGISTER_OPND_BIT | \
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A_REGISTER_OPND_BIT | \
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A_REGISTER_INDIRECT_OPND_BIT | \
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POSTINCREMENT_OPND_BIT | \
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PREDECREMENT_OPND_BIT | \
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DISPLACEMENT_OPND_BIT | \
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SELECTED_OPND_BIT | \
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INDEXED_OPND_BIT | \
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INDEX_SELECTED_OPND_BIT | \
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ABSOLUTE_SHORT_OPND_BIT | \
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ABSOLUTE_LONG_OPND_BIT | \
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EXPRESSION_OPND_BIT)
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#define GROUP_N STORABLE_GROUP_BITS
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#define FULL_EA_GROUP_BITS (D_REGISTER_OPND_BIT | \
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A_REGISTER_OPND_BIT | \
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A_REGISTER_INDIRECT_OPND_BIT | \
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POSTINCREMENT_OPND_BIT | \
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PREDECREMENT_OPND_BIT | \
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DISPLACEMENT_OPND_BIT | \
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SELECTED_OPND_BIT | \
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INDEXED_OPND_BIT | \
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INDEX_SELECTED_OPND_BIT | \
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PC_DISPLACEMENT_OPND_BIT | \
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PC_INDEXED_OPND_BIT | \
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IMMEDIATE_OPND_BIT | \
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ABSOLUTE_SHORT_OPND_BIT | \
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ABSOLUTE_LONG_OPND_BIT | \
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EXPRESSION_OPND_BIT)
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#define GROUP_O FULL_EA_GROUP_BITS
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#define STORABLE_NO_A_REGISTER_GROUP_BITS \
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(D_REGISTER_OPND_BIT | \
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A_REGISTER_INDIRECT_OPND_BIT | \
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POSTINCREMENT_OPND_BIT | \
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PREDECREMENT_OPND_BIT | \
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DISPLACEMENT_OPND_BIT | \
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SELECTED_OPND_BIT | \
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INDEXED_OPND_BIT | \
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INDEX_SELECTED_OPND_BIT | \
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ABSOLUTE_SHORT_OPND_BIT | \
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ABSOLUTE_LONG_OPND_BIT | \
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EXPRESSION_OPND_BIT)
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#define GROUP_P STORABLE_NO_A_REGISTER_GROUP_BITS
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#define FULL_EA_NO_A_REGISTER_GROUP_BITS (D_REGISTER_OPND_BIT | \
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A_REGISTER_INDIRECT_OPND_BIT | \
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POSTINCREMENT_OPND_BIT | \
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PREDECREMENT_OPND_BIT | \
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DISPLACEMENT_OPND_BIT | \
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SELECTED_OPND_BIT | \
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INDEXED_OPND_BIT | \
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INDEX_SELECTED_OPND_BIT | \
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PC_DISPLACEMENT_OPND_BIT | \
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PC_INDEXED_OPND_BIT | \
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IMMEDIATE_OPND_BIT | \
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ABSOLUTE_SHORT_OPND_BIT | \
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ABSOLUTE_LONG_OPND_BIT | \
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EXPRESSION_OPND_BIT)
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#define GROUP_Q FULL_EA_NO_A_REGISTER_GROUP_BITS
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#define MISC_1_GROUP_BITS (A_REGISTER_INDIRECT_OPND_BIT | \
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POSTINCREMENT_OPND_BIT | \
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DISPLACEMENT_OPND_BIT | \
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SELECTED_OPND_BIT | \
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INDEXED_OPND_BIT | \
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INDEX_SELECTED_OPND_BIT | \
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PC_DISPLACEMENT_OPND_BIT | \
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PC_INDEXED_OPND_BIT | \
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ABSOLUTE_SHORT_OPND_BIT | \
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ABSOLUTE_LONG_OPND_BIT | \
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EXPRESSION_OPND_BIT)
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#define GROUP_R MISC_1_GROUP_BITS
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#define STORABLE_NO_REGISTER_GROUP_BITS (A_REGISTER_INDIRECT_OPND_BIT | \
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POSTINCREMENT_OPND_BIT | \
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PREDECREMENT_OPND_BIT | \
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DISPLACEMENT_OPND_BIT | \
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SELECTED_OPND_BIT | \
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INDEXED_OPND_BIT | \
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INDEX_SELECTED_OPND_BIT | \
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ABSOLUTE_SHORT_OPND_BIT | \
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ABSOLUTE_LONG_OPND_BIT | \
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EXPRESSION_OPND_BIT)
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#define GROUP_S STORABLE_NO_REGISTER_GROUP_BITS
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#define MISC_2_GROUP_BITS (A_REGISTER_INDIRECT_OPND_BIT | \
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PREDECREMENT_OPND_BIT | \
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DISPLACEMENT_OPND_BIT | \
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SELECTED_OPND_BIT | \
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INDEXED_OPND_BIT | \
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INDEX_SELECTED_OPND_BIT | \
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ABSOLUTE_SHORT_OPND_BIT | \
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ABSOLUTE_LONG_OPND_BIT | \
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EXPRESSION_OPND_BIT)
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#define GROUP_T MISC_2_GROUP_BITS
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#define MISC_3_GROUP_BITS (A_REGISTER_INDIRECT_OPND_BIT | \
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DISPLACEMENT_OPND_BIT | \
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SELECTED_OPND_BIT | \
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INDEXED_OPND_BIT | \
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INDEX_SELECTED_OPND_BIT | \
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PC_DISPLACEMENT_OPND_BIT | \
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PC_INDEXED_OPND_BIT | \
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ABSOLUTE_SHORT_OPND_BIT | \
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ABSOLUTE_LONG_OPND_BIT | \
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EXPRESSION_OPND_BIT)
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#define GROUP_U MISC_3_GROUP_BITS
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#define CLASS_I_BITS (GROUP_A | GROUP_D)
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#define CLASS_II_BITS (GROUP_A | GROUP_B | GROUP_F | GROUP_O | \
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GROUP_P | GROUP_S)
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#define CLASS_III_BITS (GROUP_F | GROUP_N)
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#define CLASS_IV_BITS (GROUP_A | GROUP_F | GROUP_H | GROUP_I | \
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GROUP_P | GROUP_Q | GROUP_S)
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#define CLASS_V_BITS (GROUP_A | GROUP_F | GROUP_S)
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#define CLASS_VI_BITS GROUP_G
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#define CLASS_VII_BITS (GROUP_A | GROUP_F | GROUP_P)
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#define CLASS_VIII_BITS (GROUP_A | GROUP_Q)
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#define CLASS_IX_BITS GROUP_P
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#define CLASS_X_BITS (GROUP_A | GROUP_B | GROUP_F | GROUP_O | GROUP_P)
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#define CLASS_XI_BITS GROUP_C
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#define CLASS_XII_BITS (GROUP_A | GROUP_G)
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#define CLASS_XIII_BITS (GROUP_A | GROUP_F | GROUP_H | GROUP_I | GROUP_P)
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#define CLASS_XIV_BITS GROUP_M
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#define CLASS_XV_BITS GROUP_A
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#define CLASS_XVI_BITS GROUP_J
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#define CLASS_XVII_BITS GROUP_U
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#define CLASS_XVIII_BITS (GROUP_B | GROUP_U)
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#define CLASS_XIX_BITS (GROUP_B | GROUP_F)
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#define CLASS_XX_BITS (GROUP_B | GROUP_H | GROUP_I | GROUP_K | \
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GROUP_L | GROUP_M | GROUP_O | GROUP_Q)
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#define CLASS_XXI_BITS (GROUP_M | GROUP_R | GROUP_T)
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#define CLASS_XXII_BITS (GROUP_A | GROUP_E)
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#define CLASS_XXIII_BITS (GROUP_A | GROUP_F)
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#define CLASS_XXIV_BITS (GROUP_M | GROUP_S)
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#define CLASS_XXV_BITS GROUP_F
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#define CLASS_XXVI_BITS GROUP_B
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#define CLASS_XXVII_BITS GROUP_F
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#define CLASS_XXVIII_BITS GROUP_F
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#define MAX_NUMBER_OF_OPERANDS 17
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