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138 lines
4.4 KiB
C
138 lines
4.4 KiB
C
/* PDP-10 opcode list.
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Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of GDB and GAS.
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GDB and GAS are free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GDB and GAS are distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GDB or GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef PDP10_OPCODES_H
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#define PDP10_OPCODES_H
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/*
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* PDP-10 notational conventions.
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*
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* A word is 36 bits wide, with bits numbered 0 to 35, left to right
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* (most significant to least significant).
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*
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* A doubleword is two adjacent words treated as a single 72-bit entity,
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* where the word with the lower address is on the left. The direction
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* from more to less significance is always from lower to higher addresses.
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*
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* Bit numbers are always displayed in decimal. Values in bit fields,
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* especially opcodes, are always displayed in octal.
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*/
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/*
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* PDP-10 instruction types.
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*
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* Most PDP-10 instructions have this format:
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*
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* 111 1 1111 112222222222333333
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* 012345678 9012 3 4567 890123456789012345
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* +---------+----+-+----+------------------+
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* | opcode | A |I| X | Y |
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* +---------+----+-+----+------------------+
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* 9 bits 4 1 4 18 bits
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*
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* A usually specifies the accumulator.
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* I indicates indirect addressing.
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* X specifies the index register.
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* Y specifies the address.
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*
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* I, X, and Y are used together to calculate E, the effective address.
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*
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* PDP10_A_OPCODE means that A is used together with the opcode field
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* to specify the operation.
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*
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* PDP10_A_UNUSED means that A is unused and should be set to zero.
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*
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* PDP10_E_UNUSED means that I, X, and Y are unused and should be set to zero.
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*
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* PDP10_IO means that the instruction format looks like this:
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*
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* 111 1 1111 112222222222333333
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* 012 3456789 012 3 4567 890123456789012345
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* +---+-------+---+-+----+------------------+
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* |op1| device|op2|I| X | Y |
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* +---+-------+---+-+----+------------------+
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* 3 7 bits 3 1 4 18 bits
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*
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* op1 and op2 are used together to specify the operation.
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*
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* I, X, and Y as above.
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*
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* PDP10_EXTEND means that this the first word of a two-word
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* instruction. The second word is located at the effective address,
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* E, of the first instruction word.
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*/
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#define PDP10_BASIC 0x00
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#define PDP10_A_OPCODE 0x01
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#define PDP10_A_UNUSED 0x02
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#define PDP10_E_UNUSED 0x04
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#define PDP10_IO 0x08
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#define PDP10_EXTEND 0x10
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/*
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* PDP-10 CPU models.
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*/
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#define PDP10_NONE 0x00000000
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#define PDP6_166 0x00000001 /* DEC PDP-6 Type 166 Arithmetic Processor */
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#define PDP10_KA10 0x00000002 /* DEC PDP-10 KA10 */
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#define PDP10_KA10_ITS 0x00000004 /* DEC PDP-10 KA10, modifications for ITS */
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#define PDP10_KI10 0x00000008 /* DEC PDP-10 KI10 */
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#define PDP10_KL10 0x00000010 /* DEC PDP-10 KL10 */
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#define PDP10_KL10_ITS 0x00000020 /* DEC PDP-10 KL10, ITS microcode */
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#define PDP10_KL10_271 0x00000040 /* DEC PDP-10 KL10, microcode version >= 271 */
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#define PDP10_KS10 0x00000080 /* DEC PDP-10 KS10 */
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#define PDP10_KS10_ITS 0x00000100 /* DEC PDP-10 KS10, ITS microcode */
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#define PDP10_KC10 0x00000200 /* DEC PDP-10 KC10 */
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#define PDP10_XKL1 0x00000400 /* XKL TOAD-1 XKL-1 */
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#define PDP10_ALL 0xffffffff
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struct pdp10_instruction
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{
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const char *name;
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unsigned int opcode;
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unsigned int type;
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unsigned int model;
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};
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struct pdp10_device
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{
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const char *name;
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unsigned number;
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unsigned int model;
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};
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extern const struct pdp10_instruction pdp10_instruction[];
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extern const unsigned int pdp10_num_instructions;
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extern const struct pdp10_device pdp10_device[];
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extern const unsigned int pdp10_num_devices;
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extern const struct pdp10_instruction pdp10_alias[];
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extern const unsigned int pdp10_num_aliases;
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extern const struct pdp10_instruction pdp10_extended_instruction[];
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extern const unsigned int pdp10_num_extended_instructions;
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const struct pdp10_instruction *pdp10_instruction_from_high13(unsigned int high13);
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const struct pdp10_instruction *pdp10_instruction_from_name(const char *name);
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#endif /* PDP10_OPCODES_H */
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