source: trunk/libs/newlib/src/include/opcode/alpha.h @ 507

Last change on this file since 507 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 8.6 KB
Line 
1/* alpha.h -- Header file for Alpha opcode table
2   Copyright 1996, 1999, 2001, 2003, 2010 Free Software Foundation, Inc.
3   Contributed by Richard Henderson <rth@tamu.edu>,
4   patterned after the PPC opcode table written by Ian Lance Taylor.
5
6   This file is part of GDB, GAS, and the GNU binutils.
7
8   GDB, GAS, and the GNU binutils are free software; you can redistribute
9   them and/or modify them under the terms of the GNU General Public
10   License as published by the Free Software Foundation; either version 3,
11   or (at your option) any later version.
12
13   GDB, GAS, and the GNU binutils are distributed in the hope that they
14   will be useful, but WITHOUT ANY WARRANTY; without even the implied
15   warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
16   the GNU General Public License for more details.
17
18   You should have received a copy of the GNU General Public License
19   along with this file; see the file COPYING3.  If not, write to the Free
20   Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
21   MA 02110-1301, USA.  */
22
23#ifndef OPCODE_ALPHA_H
24#define OPCODE_ALPHA_H
25
26/* The opcode table is an array of struct alpha_opcode.  */
27
28struct alpha_opcode
29{
30  /* The opcode name.  */
31  const char *name;
32
33  /* The opcode itself.  Those bits which will be filled in with
34     operands are zeroes.  */
35  unsigned opcode;
36
37  /* The opcode mask.  This is used by the disassembler.  This is a
38     mask containing ones indicating those bits which must match the
39     opcode field, and zeroes indicating those bits which need not
40     match (and are presumably filled in by operands).  */
41  unsigned mask;
42
43  /* One bit flags for the opcode.  These are primarily used to
44     indicate specific processors and environments support the
45     instructions.  The defined values are listed below. */
46  unsigned flags;
47
48  /* An array of operand codes.  Each code is an index into the
49     operand table.  They appear in the order which the operands must
50     appear in assembly code, and are terminated by a zero.  */
51  unsigned char operands[4];
52};
53
54/* The table itself is sorted by major opcode number, and is otherwise
55   in the order in which the disassembler should consider
56   instructions.  */
57extern const struct alpha_opcode alpha_opcodes[];
58extern const unsigned alpha_num_opcodes;
59
60/* Values defined for the flags field of a struct alpha_opcode.  */
61
62/* CPU Availability */
63#define AXP_OPCODE_BASE  0x0001  /* Base architecture -- all cpus.  */
64#define AXP_OPCODE_EV4   0x0002  /* EV4 specific PALcode insns.  */
65#define AXP_OPCODE_EV5   0x0004  /* EV5 specific PALcode insns.  */
66#define AXP_OPCODE_EV6   0x0008  /* EV6 specific PALcode insns.  */
67#define AXP_OPCODE_BWX   0x0100  /* Byte/word extension (amask bit 0).  */
68#define AXP_OPCODE_CIX   0x0200  /* "Count" extension (amask bit 1).  */
69#define AXP_OPCODE_MAX   0x0400  /* Multimedia extension (amask bit 8).  */
70
71#define AXP_OPCODE_NOPAL (~(AXP_OPCODE_EV4|AXP_OPCODE_EV5|AXP_OPCODE_EV6))
72
73/* A macro to extract the major opcode from an instruction.  */
74#define AXP_OP(i)       (((i) >> 26) & 0x3F)
75
76/* The total number of major opcodes. */
77#define AXP_NOPS        0x40
78
79
80/* The operands table is an array of struct alpha_operand.  */
81
82struct alpha_operand
83{
84  /* The number of bits in the operand.  */
85  unsigned int bits : 5;
86
87  /* How far the operand is left shifted in the instruction.  */
88  unsigned int shift : 5;
89
90  /* The default relocation type for this operand.  */
91  signed int default_reloc : 16;
92
93  /* One bit syntax flags.  */
94  unsigned int flags : 16;
95
96  /* Insertion function.  This is used by the assembler.  To insert an
97     operand value into an instruction, check this field.
98
99     If it is NULL, execute
100         i |= (op & ((1 << o->bits) - 1)) << o->shift;
101     (i is the instruction which we are filling in, o is a pointer to
102     this structure, and op is the opcode value; this assumes twos
103     complement arithmetic).
104
105     If this field is not NULL, then simply call it with the
106     instruction and the operand value.  It will return the new value
107     of the instruction.  If the ERRMSG argument is not NULL, then if
108     the operand value is illegal, *ERRMSG will be set to a warning
109     string (the operand will be inserted in any case).  If the
110     operand value is legal, *ERRMSG will be unchanged (most operands
111     can accept any value).  */
112  unsigned (*insert) (unsigned instruction, int op, const char **errmsg);
113
114  /* Extraction function.  This is used by the disassembler.  To
115     extract this operand type from an instruction, check this field.
116
117     If it is NULL, compute
118         op = ((i) >> o->shift) & ((1 << o->bits) - 1);
119         if ((o->flags & AXP_OPERAND_SIGNED) != 0
120             && (op & (1 << (o->bits - 1))) != 0)
121           op -= 1 << o->bits;
122     (i is the instruction, o is a pointer to this structure, and op
123     is the result; this assumes twos complement arithmetic).
124
125     If this field is not NULL, then simply call it with the
126     instruction value.  It will return the value of the operand.  If
127     the INVALID argument is not NULL, *INVALID will be set to
128     non-zero if this operand type can not actually be extracted from
129     this operand (i.e., the instruction does not match).  If the
130     operand is valid, *INVALID will not be changed.  */
131  int (*extract) (unsigned instruction, int *invalid);
132};
133
134/* Elements in the table are retrieved by indexing with values from
135   the operands field of the alpha_opcodes table.  */
136
137extern const struct alpha_operand alpha_operands[];
138extern const unsigned alpha_num_operands;
139
140/* Values defined for the flags field of a struct alpha_operand.  */
141
142/* Mask for selecting the type for typecheck purposes */
143#define AXP_OPERAND_TYPECHECK_MASK                                      \
144  (AXP_OPERAND_PARENS | AXP_OPERAND_COMMA | AXP_OPERAND_IR |            \
145   AXP_OPERAND_FPR | AXP_OPERAND_RELATIVE | AXP_OPERAND_SIGNED |        \
146   AXP_OPERAND_UNSIGNED)
147
148/* This operand does not actually exist in the assembler input.  This
149   is used to support extended mnemonics, for which two operands fields
150   are identical.  The assembler should call the insert function with
151   any op value.  The disassembler should call the extract function,
152   ignore the return value, and check the value placed in the invalid
153   argument.  */
154#define AXP_OPERAND_FAKE        01
155
156/* The operand should be wrapped in parentheses rather than separated
157   from the previous by a comma.  This is used for the load and store
158   instructions which want their operands to look like "Ra,disp(Rb)".  */
159#define AXP_OPERAND_PARENS      02
160
161/* Used in combination with PARENS, this supresses the supression of
162   the comma.  This is used for "jmp Ra,(Rb),hint".  */
163#define AXP_OPERAND_COMMA       04
164
165/* This operand names an integer register.  */
166#define AXP_OPERAND_IR          010
167
168/* This operand names a floating point register.  */
169#define AXP_OPERAND_FPR         020
170
171/* This operand is a relative branch displacement.  The disassembler
172   prints these symbolically if possible.  */
173#define AXP_OPERAND_RELATIVE    040
174
175/* This operand takes signed values.  */
176#define AXP_OPERAND_SIGNED      0100
177
178/* This operand takes unsigned values.  This exists primarily so that
179   a flags value of 0 can be treated as end-of-arguments.  */
180#define AXP_OPERAND_UNSIGNED    0200
181
182/* Supress overflow detection on this field.  This is used for hints. */
183#define AXP_OPERAND_NOOVERFLOW  0400
184
185/* Mask for optional argument default value.  */
186#define AXP_OPERAND_OPTIONAL_MASK 07000
187
188/* This operand defaults to zero.  This is used for jump hints.  */
189#define AXP_OPERAND_DEFAULT_ZERO 01000
190
191/* This operand should default to the first (real) operand and is used
192   in conjunction with AXP_OPERAND_OPTIONAL.  This allows
193   "and $0,3,$0" to be written as "and $0,3", etc.  I don't like
194   it, but it's what DEC does.  */
195#define AXP_OPERAND_DEFAULT_FIRST 02000
196
197/* Similarly, this operand should default to the second (real) operand.
198   This allows "negl $0" instead of "negl $0,$0".  */
199#define AXP_OPERAND_DEFAULT_SECOND 04000
200
201
202/* Register common names */
203
204#define AXP_REG_V0      0
205#define AXP_REG_T0      1
206#define AXP_REG_T1      2
207#define AXP_REG_T2      3
208#define AXP_REG_T3      4
209#define AXP_REG_T4      5
210#define AXP_REG_T5      6
211#define AXP_REG_T6      7
212#define AXP_REG_T7      8
213#define AXP_REG_S0      9
214#define AXP_REG_S1      10
215#define AXP_REG_S2      11
216#define AXP_REG_S3      12
217#define AXP_REG_S4      13
218#define AXP_REG_S5      14
219#define AXP_REG_FP      15
220#define AXP_REG_A0      16
221#define AXP_REG_A1      17
222#define AXP_REG_A2      18
223#define AXP_REG_A3      19
224#define AXP_REG_A4      20
225#define AXP_REG_A5      21
226#define AXP_REG_T8      22
227#define AXP_REG_T9      23
228#define AXP_REG_T10     24
229#define AXP_REG_T11     25
230#define AXP_REG_RA      26
231#define AXP_REG_PV      27
232#define AXP_REG_T12     27
233#define AXP_REG_AT      28
234#define AXP_REG_GP      29
235#define AXP_REG_SP      30
236#define AXP_REG_ZERO    31
237
238#endif /* OPCODE_ALPHA_H */
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