1 /* Opcode table for the ARC.
2 Copyright 1994, 1995, 1997, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Contributed by Doug Evans (dje@cygnus.com).
6 This file is part of GAS, the GNU Assembler, GDB, the GNU debugger, and
9 GAS/GDB is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GAS/GDB is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GAS or GDB; see the file COPYING. If not, write to
21 the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
22 MA 02111-1307, USA. */
25 /* List of the various cpu types.
26 The tables currently use bit masks to say whether the instruction or
27 whatever is supported by a particular cpu. This lets us have one entry
28 apply to several cpus.
30 The `base' cpu must be 0. The cpu type is treated independently of
31 endianness. The complete `mach' number includes endianness.
32 These values are internal to opcodes/bfd/binutils/gas. */
38 /* Additional cpu values can be inserted here and ARC_MACH_BIG moved down. */
39 #define ARC_MACH_BIG 16
41 /* Mask of number of bits necessary to record cpu type. */
42 #define ARC_MACH_CPU_MASK (ARC_MACH_BIG - 1)
44 /* Mask of number of bits necessary to record cpu type + endianness. */
45 #define ARC_MACH_MASK ((ARC_MACH_BIG << 1) - 1)
47 /* Type to denote an ARC instruction (at least a 32 bit unsigned int). */
49 typedef unsigned int arc_insn
;
52 char *syntax
; /* syntax of insn */
53 unsigned long mask
, value
; /* recognize insn if (op&mask) == value */
54 int flags
; /* various flag bits */
56 /* Values for `flags'. */
58 /* Return CPU number, given flag bits. */
59 #define ARC_OPCODE_CPU(bits) ((bits) & ARC_MACH_CPU_MASK)
61 /* Return MACH number, given flag bits. */
62 #define ARC_OPCODE_MACH(bits) ((bits) & ARC_MACH_MASK)
64 /* First opcode flag bit available after machine mask. */
65 #define ARC_OPCODE_FLAG_START (ARC_MACH_MASK + 1)
67 /* This insn is a conditional branch. */
68 #define ARC_OPCODE_COND_BRANCH (ARC_OPCODE_FLAG_START)
69 #define SYNTAX_3OP (ARC_OPCODE_COND_BRANCH << 1)
70 #define SYNTAX_LENGTH (SYNTAX_3OP )
71 #define SYNTAX_2OP (SYNTAX_3OP << 1)
72 #define OP1_MUST_BE_IMM (SYNTAX_2OP << 1)
73 #define OP1_IMM_IMPLIED (OP1_MUST_BE_IMM << 1)
74 #define SYNTAX_VALID (OP1_IMM_IMPLIED << 1)
76 #define I(x) (((x) & 31) << 27)
77 #define A(x) (((x) & ARC_MASK_REG) << ARC_SHIFT_REGA)
78 #define B(x) (((x) & ARC_MASK_REG) << ARC_SHIFT_REGB)
79 #define C(x) (((x) & ARC_MASK_REG) << ARC_SHIFT_REGC)
80 #define R(x,b,m) (((x) & (m)) << (b)) /* value X, mask M, at bit B */
82 /* These values are used to optimize assembly and disassembly. Each insn
83 is on a list of related insns (same first letter for assembly, same
84 insn code for disassembly). */
86 struct arc_opcode
*next_asm
; /* Next instr to try during assembly. */
87 struct arc_opcode
*next_dis
; /* Next instr to try during disassembly. */
89 /* Macros to create the hash values for the lists. */
90 #define ARC_HASH_OPCODE(string) \
91 ((string)[0] >= 'a' && (string)[0] <= 'z' ? (string)[0] - 'a' : 26)
92 #define ARC_HASH_ICODE(insn) \
93 ((unsigned int) (insn) >> 27)
95 /* Macros to access `next_asm', `next_dis' so users needn't care about the
96 underlying mechanism. */
97 #define ARC_OPCODE_NEXT_ASM(op) ((op)->next_asm)
98 #define ARC_OPCODE_NEXT_DIS(op) ((op)->next_dis)
101 /* this is an "insert at front" linked list per Metaware spec
102 that new definitions override older ones. */
103 extern struct arc_opcode
*arc_ext_opcodes
;
105 struct arc_operand_value
{
106 char *name
; /* eg: "eq" */
107 short value
; /* eg: 1 */
108 unsigned char type
; /* index into `arc_operands' */
109 unsigned char flags
; /* various flag bits */
111 /* Values for `flags'. */
113 /* Return CPU number, given flag bits. */
114 #define ARC_OPVAL_CPU(bits) ((bits) & ARC_MACH_CPU_MASK)
115 /* Return MACH number, given flag bits. */
116 #define ARC_OPVAL_MACH(bits) ((bits) & ARC_MACH_MASK)
119 struct arc_ext_operand_value
{
120 struct arc_ext_operand_value
*next
;
121 struct arc_operand_value operand
;
124 extern struct arc_ext_operand_value
*arc_ext_operands
;
127 /* One of the insn format chars. */
130 /* The number of bits in the operand (may be unused for a modifier). */
133 /* How far the operand is left shifted in the instruction, or
134 the modifier's flag bit (may be unused for a modifier. */
137 /* Various flag bits. */
140 /* Values for `flags'. */
142 /* This operand is a suffix to the opcode. */
143 #define ARC_OPERAND_SUFFIX 1
145 /* This operand is a relative branch displacement. The disassembler
146 prints these symbolically if possible. */
147 #define ARC_OPERAND_RELATIVE_BRANCH 2
149 /* This operand is an absolute branch address. The disassembler
150 prints these symbolically if possible. */
151 #define ARC_OPERAND_ABSOLUTE_BRANCH 4
153 /* This operand is an address. The disassembler
154 prints these symbolically if possible. */
155 #define ARC_OPERAND_ADDRESS 8
157 /* This operand is a long immediate value. */
158 #define ARC_OPERAND_LIMM 0x10
160 /* This operand takes signed values. */
161 #define ARC_OPERAND_SIGNED 0x20
163 /* This operand takes signed values, but also accepts a full positive
164 range of values. That is, if bits is 16, it takes any value from
165 -0x8000 to 0xffff. */
166 #define ARC_OPERAND_SIGNOPT 0x40
168 /* This operand should be regarded as a negative number for the
169 purposes of overflow checking (i.e., the normal most negative
170 number is disallowed and one more than the normal most positive
171 number is allowed). This flag will only be set for a signed
173 #define ARC_OPERAND_NEGATIVE 0x80
175 /* This operand doesn't really exist. The program uses these operands
177 #define ARC_OPERAND_FAKE 0x100
179 /* separate flags operand for j and jl instructions */
180 #define ARC_OPERAND_JUMPFLAGS 0x200
182 /* allow warnings and errors to be issued after call to insert_xxxxxx */
183 #define ARC_OPERAND_WARN 0x400
184 #define ARC_OPERAND_ERROR 0x800
186 /* this is a load operand */
187 #define ARC_OPERAND_LOAD 0x8000
189 /* this is a store operand */
190 #define ARC_OPERAND_STORE 0x10000
192 /* Modifier values. */
193 /* A dot is required before a suffix. Eg: .le */
194 #define ARC_MOD_DOT 0x1000
196 /* A normal register is allowed (not used, but here for completeness). */
197 #define ARC_MOD_REG 0x2000
199 /* An auxiliary register name is expected. */
200 #define ARC_MOD_AUXREG 0x4000
202 /* Sum of all ARC_MOD_XXX bits. */
203 #define ARC_MOD_BITS 0x7000
205 /* Non-zero if the operand type is really a modifier. */
206 #define ARC_MOD_P(X) ((X) & ARC_MOD_BITS)
208 /* enforce read/write only register restrictions */
209 #define ARC_REGISTER_READONLY 0x01
210 #define ARC_REGISTER_WRITEONLY 0x02
211 #define ARC_REGISTER_NOSHORT_CUT 0x04
213 /* Insertion function. This is used by the assembler. To insert an
214 operand value into an instruction, check this field.
216 If it is NULL, execute
217 i |= (p & ((1 << o->bits) - 1)) << o->shift;
218 (I is the instruction which we are filling in, O is a pointer to
219 this structure, and OP is the opcode value; this assumes twos
220 complement arithmetic).
222 If this field is not NULL, then simply call it with the
223 instruction and the operand value. It will return the new value
224 of the instruction. If the ERRMSG argument is not NULL, then if
225 the operand value is illegal, *ERRMSG will be set to a warning
226 string (the operand will be inserted in any case). If the
227 operand value is legal, *ERRMSG will be unchanged.
229 REG is non-NULL when inserting a register value. */
232 (arc_insn insn
, const struct arc_operand
*operand
, int mods
,
233 const struct arc_operand_value
*reg
, long value
, const char **errmsg
);
235 /* Extraction function. This is used by the disassembler. To
236 extract this operand type from an instruction, check this field.
238 If it is NULL, compute
239 op = ((i) >> o->shift) & ((1 << o->bits) - 1);
240 if ((o->flags & ARC_OPERAND_SIGNED) != 0
241 && (op & (1 << (o->bits - 1))) != 0)
243 (I is the instruction, O is a pointer to this structure, and OP
244 is the result; this assumes twos complement arithmetic).
246 If this field is not NULL, then simply call it with the
247 instruction value. It will return the value of the operand. If
248 the INVALID argument is not NULL, *INVALID will be set to
249 non-zero if this operand type can not actually be extracted from
250 this operand (i.e., the instruction does not match). If the
251 operand is valid, *INVALID will not be changed.
253 INSN is a pointer to an array of two `arc_insn's. The first element is
254 the insn, the second is the limm if present.
256 Operands that have a printable form like registers and suffixes have
257 their struct arc_operand_value pointer stored in OPVAL. */
260 (arc_insn
*insn
, const struct arc_operand
*operand
, int mods
,
261 const struct arc_operand_value
**opval
, int *invalid
);
264 /* Bits that say what version of cpu we have. These should be passed to
265 arc_init_opcode_tables. At present, all there is is the cpu type. */
267 /* CPU number, given value passed to `arc_init_opcode_tables'. */
268 #define ARC_HAVE_CPU(bits) ((bits) & ARC_MACH_CPU_MASK)
269 /* MACH number, given value passed to `arc_init_opcode_tables'. */
270 #define ARC_HAVE_MACH(bits) ((bits) & ARC_MACH_MASK)
272 /* Special register values: */
273 #define ARC_REG_SHIMM_UPDATE 61
274 #define ARC_REG_SHIMM 63
275 #define ARC_REG_LIMM 62
277 /* Non-zero if REG is a constant marker. */
278 #define ARC_REG_CONSTANT_P(REG) ((REG) >= 61)
280 /* Positions and masks of various fields: */
281 #define ARC_SHIFT_REGA 21
282 #define ARC_SHIFT_REGB 15
283 #define ARC_SHIFT_REGC 9
284 #define ARC_MASK_REG 63
286 /* Delay slot types. */
287 #define ARC_DELAY_NONE 0 /* no delay slot */
288 #define ARC_DELAY_NORMAL 1 /* delay slot in both cases */
289 #define ARC_DELAY_JUMP 2 /* delay slot only if branch taken */
291 /* Non-zero if X will fit in a signed 9 bit field. */
292 #define ARC_SHIMM_CONST_P(x) ((long) (x) >= -256 && (long) (x) <= 255)
294 extern const struct arc_operand arc_operands
[];
295 extern const int arc_operand_count
;
296 extern struct arc_opcode arc_opcodes
[];
297 extern const int arc_opcodes_count
;
298 extern const struct arc_operand_value arc_suffixes
[];
299 extern const int arc_suffixes_count
;
300 extern const struct arc_operand_value arc_reg_names
[];
301 extern const int arc_reg_names_count
;
302 extern unsigned char arc_operand_map
[];
304 /* Utility fns in arc-opc.c. */
305 int arc_get_opcode_mach (int, int);
307 /* `arc_opcode_init_tables' must be called before `arc_xxx_supported'. */
308 void arc_opcode_init_tables (int);
309 void arc_opcode_init_insert (void);
310 void arc_opcode_init_extract (void);
311 const struct arc_opcode
*arc_opcode_lookup_asm (const char *);
312 const struct arc_opcode
*arc_opcode_lookup_dis (unsigned int);
313 int arc_opcode_limm_p (long *);
314 const struct arc_operand_value
*arc_opcode_lookup_suffix
315 (const struct arc_operand
*type
, int value
);
316 int arc_opcode_supported (const struct arc_opcode
*);
317 int arc_opval_supported (const struct arc_operand_value
*);
318 int arc_limm_fixup_adjust (arc_insn
);
319 int arc_insn_is_j (arc_insn
);
320 int arc_insn_not_jl (arc_insn
);
321 int arc_operand_type (int);
322 struct arc_operand_value
*get_ext_suffix (char *);
323 int arc_get_noshortcut_flag (void);