--- /dev/null
+/* alpha.h -- Header file for Alpha opcode table
+ Copyright 1996 Free Software Foundation, Inc.
+ Contributed by Richard Henderson <rth@tamu.edu>,
+ patterned after the PPC opcode table written by Ian Lance Taylor.
+
+This file is part of GDB, GAS, and the GNU binutils.
+
+GDB, GAS, and the GNU binutils are free software; you can redistribute
+them and/or modify them under the terms of the GNU General Public
+License as published by the Free Software Foundation; either version
+1, or (at your option) any later version.
+
+GDB, GAS, and the GNU binutils are distributed in the hope that they
+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 file; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#ifndef OPCODE_ALPHA_H
+#define OPCODE_ALPHA_H
+
+#include "bfd.h" /* for bfd_reloc_code_real_type */
+
+/* The opcode table is an array of struct alpha_opcode. */
+
+struct alpha_opcode
+{
+ /* The opcode name. */
+ const char *name;
+
+ /* The opcode itself. Those bits which will be filled in with
+ operands are zeroes. */
+ unsigned opcode;
+
+ /* The opcode mask. This is used by the disassembler. This is a
+ mask containing ones indicating those bits which must match the
+ opcode field, and zeroes indicating those bits which need not
+ match (and are presumably filled in by operands). */
+ unsigned mask;
+
+ /* One bit flags for the opcode. These are primarily used to
+ indicate specific processors and environments support the
+ instructions. The defined values are listed below. */
+ unsigned flags;
+
+ /* An array of operand codes. Each code is an index into the
+ operand table. They appear in the order which the operands must
+ appear in assembly code, and are terminated by a zero. */
+ unsigned char operands[4];
+};
+
+/* The table itself is sorted by major opcode number, and is otherwise
+ in the order in which the disassembler should consider
+ instructions. */
+extern const struct alpha_opcode alpha_opcodes[];
+extern const int alpha_num_opcodes;
+
+/* Values defined for the flags field of a struct alpha_opcode. */
+
+/* CPU Availability */
+#define AXP_OPCODE_ALL 00001
+#define AXP_OPCODE_EV4 00002
+/* EV45 is not programatically different */
+#define AXP_OPCODE_EV5 00004
+#define AXP_OPCODE_EV56 00010
+
+/* A macro to extract the major opcode from an instruction. */
+#define AXP_OP(i) (((i) >> 26) & 0x3F)
+
+/* The total number of major opcodes. */
+#define AXP_NOPS 0x40
+
+\f
+/* The operands table is an array of struct alpha_operand. */
+
+struct alpha_operand
+{
+ /* The number of bits in the operand. */
+ int bits;
+
+ /* How far the operand is left shifted in the instruction. */
+ int shift;
+
+ /* The default relocation type for this operand. */
+ bfd_reloc_code_real_type default_reloc;
+
+ /* Insertion function. This is used by the assembler. To insert an
+ operand value into an instruction, check this field.
+
+ If it is NULL, execute
+ i |= (op & ((1 << o->bits) - 1)) << o->shift;
+ (i is the instruction which we are filling in, o is a pointer to
+ this structure, and op is the opcode value; this assumes twos
+ complement arithmetic).
+
+ If this field is not NULL, then simply call it with the
+ instruction and the operand value. It will return the new value
+ of the instruction. If the ERRMSG argument is not NULL, then if
+ the operand value is illegal, *ERRMSG will be set to a warning
+ string (the operand will be inserted in any case). If the
+ operand value is legal, *ERRMSG will be unchanged (most operands
+ can accept any value). */
+ unsigned (*insert) PARAMS ((unsigned instruction, int op,
+ const char **errmsg));
+
+ /* Extraction function. This is used by the disassembler. To
+ extract this operand type from an instruction, check this field.
+
+ If it is NULL, compute
+ op = ((i) >> o->shift) & ((1 << o->bits) - 1);
+ if ((o->flags & AXP_OPERAND_SIGNED) != 0
+ && (op & (1 << (o->bits - 1))) != 0)
+ op -= 1 << o->bits;
+ (i is the instruction, o is a pointer to this structure, and op
+ is the result; this assumes twos complement arithmetic).
+
+ If this field is not NULL, then simply call it with the
+ instruction value. It will return the value of the operand. If
+ the INVALID argument is not NULL, *INVALID will be set to
+ non-zero if this operand type can not actually be extracted from
+ this operand (i.e., the instruction does not match). If the
+ operand is valid, *INVALID will not be changed. */
+ int (*extract) PARAMS ((unsigned instruction, int *invalid));
+
+ /* One bit syntax flags. */
+ unsigned flags;
+};
+
+/* Elements in the table are retrieved by indexing with values from
+ the operands field of the alpha_opcodes table. */
+
+extern const struct alpha_operand alpha_operands[];
+extern const int alpha_num_operands;
+
+/* Values defined for the flags field of a struct alpha_operand. */
+
+/* Mask for selecting the type for typecheck purposes */
+#define AXP_OPERAND_TYPECHECK_MASK \
+ (AXP_OPERAND_PARENS | AXP_OPERAND_COMMA | AXP_OPERAND_IR | \
+ AXP_OPERAND_FPR | AXP_OPERAND_RELATIVE | AXP_OPERAND_SIGNED | \
+ AXP_OPERAND_UNSIGNED)
+
+/* This operand does not actually exist in the assembler input. This
+ is used to support extended mnemonics, for which two operands fields
+ are identical. The assembler should call the insert function with
+ any op value. The disassembler should call the extract function,
+ ignore the return value, and check the value placed in the invalid
+ argument. */
+#define AXP_OPERAND_FAKE 01
+
+/* The operand should be wrapped in parentheses rather than separated
+ from the previous by a comma. This is used for the load and store
+ instructions which want their operands to look like "Ra,disp(Rb)". */
+#define AXP_OPERAND_PARENS 02
+
+/* Used in combination with PARENS, this supresses the supression of
+ the comma. This is used for "jmp Ra,(Rb),hint". */
+#define AXP_OPERAND_COMMA 04
+
+/* This operand names an integer register. */
+#define AXP_OPERAND_IR 010
+
+/* This operand names a floating point register. */
+#define AXP_OPERAND_FPR 020
+
+/* This operand is a relative branch displacement. The disassembler
+ prints these symbolically if possible. */
+#define AXP_OPERAND_RELATIVE 040
+
+/* This operand takes signed values. */
+#define AXP_OPERAND_SIGNED 0100
+
+/* This operand takes unsigned values. This exists primarily so that
+ a flags value of 0 can be treated as end-of-arguments. */
+#define AXP_OPERAND_UNSIGNED 0200
+
+/* Supress overflow detection on this field. This is used for hints. */
+#define AXP_OPERAND_NOOVERFLOW 0400
+
+/* Mask for optional argument default value. */
+#define AXP_OPERAND_OPTIONAL_MASK 07000
+
+/* This operand defaults to zero. This is used for jump hints. */
+#define AXP_OPERAND_DEFAULT_ZERO 01000
+
+/* This operand should default to the first (real) operand and is used
+ in conjunction with AXP_OPERAND_OPTIONAL. This allows
+ "and $0,3,$0" to be written as "and $0,3", etc. I don't like
+ it, but it's what DEC does. */
+#define AXP_OPERAND_DEFAULT_FIRST 02000
+
+/* Similarly, this operand should default to the second (real) operand.
+ This allows "negl $0" instead of "negl $0,$0". */
+#define AXP_OPERAND_DEFAULT_SECOND 04000
+
+\f
+/* Register common names */
+
+#define AXP_REG_V0 0
+#define AXP_REG_T0 1
+#define AXP_REG_T1 2
+#define AXP_REG_T2 3
+#define AXP_REG_T3 4
+#define AXP_REG_T4 5
+#define AXP_REG_T5 6
+#define AXP_REG_T6 7
+#define AXP_REG_T7 8
+#define AXP_REG_S0 9
+#define AXP_REG_S1 10
+#define AXP_REG_S2 11
+#define AXP_REG_S3 12
+#define AXP_REG_S4 13
+#define AXP_REG_S5 14
+#define AXP_REG_FP 15
+#define AXP_REG_A0 16
+#define AXP_REG_A1 17
+#define AXP_REG_A2 18
+#define AXP_REG_A3 19
+#define AXP_REG_A4 20
+#define AXP_REG_A5 21
+#define AXP_REG_T8 22
+#define AXP_REG_T9 23
+#define AXP_REG_T10 24
+#define AXP_REG_T11 25
+#define AXP_REG_RA 26
+#define AXP_REG_PV 27
+#define AXP_REG_T12 27
+#define AXP_REG_AT 28
+#define AXP_REG_GP 29
+#define AXP_REG_SP 30
+#define AXP_REG_ZERO 31
+
+#endif /* OPCODE_ALPHA_H */
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