1 /* tic80.h -- Header file for TI TMS320C80 (MV) opcode table
2 Copyright 1996, 1997, 2003, 2010 Free Software Foundation, Inc.
3 Written by Fred Fish (fnf@cygnus.com), Cygnus Support
5 This file is part of GDB, GAS, and the GNU binutils.
7 GDB, GAS, and the GNU binutils are free software; you can redistribute
8 them and/or modify them under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either version 3,
10 or (at your option) any later version.
12 GDB, GAS, and the GNU binutils are distributed in the hope that they
13 will be useful, but WITHOUT ANY WARRANTY; without even the implied
14 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 the GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this file; see the file COPYING3. If not, write to the Free
19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 /* The opcode table is an array of struct tic80_opcode. */
29 /* The opcode name. */
33 /* The opcode itself. Those bits which will be filled in with operands
38 /* The opcode mask. This is used by the disassembler. This is a mask
39 containing ones indicating those bits which must match the opcode
40 field, and zeroes indicating those bits which need not match (and are
41 presumably filled in by operands). */
45 /* Special purpose flags for this opcode. */
49 /* An array of operand codes. Each code is an index into the operand
50 table. They appear in the order which the operands must appear in
51 assembly code, and are terminated by a zero. FIXME: Adjust size to
52 match actual requirements when TIc80 support is complete */
54 unsigned char operands[8];
57 /* The table itself is sorted by major opcode number, and is otherwise in
58 the order in which the disassembler should consider instructions.
59 FIXME: This isn't currently true. */
61 extern const struct tic80_opcode tic80_opcodes[];
62 extern const int tic80_num_opcodes;
65 /* The operands table is an array of struct tic80_operand. */
69 /* The number of bits in the operand. */
73 /* How far the operand is left shifted in the instruction. */
77 /* Insertion function. This is used by the assembler. To insert an
78 operand value into an instruction, check this field.
80 If it is NULL, execute
81 i |= (op & ((1 << o->bits) - 1)) << o->shift;
82 (i is the instruction which we are filling in, o is a pointer to
83 this structure, and op is the opcode value; this assumes twos
84 complement arithmetic).
86 If this field is not NULL, then simply call it with the
87 instruction and the operand value. It will return the new value
88 of the instruction. If the ERRMSG argument is not NULL, then if
89 the operand value is illegal, *ERRMSG will be set to a warning
90 string (the operand will be inserted in any case). If the
91 operand value is legal, *ERRMSG will be unchanged (most operands
92 can accept any value). */
94 unsigned long (*insert)
95 (unsigned long instruction, long op, const char **errmsg);
97 /* Extraction function. This is used by the disassembler. To
98 extract this operand type from an instruction, check this field.
100 If it is NULL, compute
101 op = ((i) >> o->shift) & ((1 << o->bits) - 1);
102 if ((o->flags & TIC80_OPERAND_SIGNED) != 0
103 && (op & (1 << (o->bits - 1))) != 0)
105 (i is the instruction, o is a pointer to this structure, and op
106 is the result; this assumes twos complement arithmetic).
108 If this field is not NULL, then simply call it with the
109 instruction value. It will return the value of the operand. If
110 the INVALID argument is not NULL, *INVALID will be set to
111 non-zero if this operand type can not actually be extracted from
112 this operand (i.e., the instruction does not match). If the
113 operand is valid, *INVALID will not be changed. */
115 long (*extract) (unsigned long instruction, int *invalid);
117 /* One bit syntax flags. */
122 /* Elements in the table are retrieved by indexing with values from
123 the operands field of the tic80_opcodes table. */
125 extern const struct tic80_operand tic80_operands[];
128 /* Values defined for the flags field of a struct tic80_operand.
130 Note that flags for all predefined symbols, such as the general purpose
131 registers (ex: r10), control registers (ex: FPST), condition codes (ex:
132 eq0.b), bit numbers (ex: gt.b), etc are large enough that they can be
133 or'd into an int where the lower bits contain the actual numeric value
134 that correponds to this predefined symbol. This way a single int can
135 contain both the value of the symbol and it's type.
138 /* This operand must be an even register number. Floating point numbers
139 for example are stored in even/odd register pairs. */
141 #define TIC80_OPERAND_EVEN (1 << 0)
143 /* This operand must be an odd register number and must be one greater than
144 the register number of the previous operand. I.E. the second register in
145 an even/odd register pair. */
147 #define TIC80_OPERAND_ODD (1 << 1)
149 /* This operand takes signed values. */
151 #define TIC80_OPERAND_SIGNED (1 << 2)
153 /* This operand may be either a predefined constant name or a numeric value.
154 An example would be a condition code like "eq0.b" which has the numeric
157 #define TIC80_OPERAND_NUM (1 << 3)
159 /* This operand should be wrapped in parentheses rather than separated
160 from the previous one by a comma. This is used for various
161 instructions, like the load and store instructions, which want
162 their operands to look like "displacement(reg)" */
164 #define TIC80_OPERAND_PARENS (1 << 4)
166 /* This operand is a PC relative branch offset. The disassembler prints
167 these symbolically if possible. Note that the offsets are taken as word
170 #define TIC80_OPERAND_PCREL (1 << 5)
172 /* This flag is a hint to the disassembler for using hex as the prefered
173 printing format, even for small positive or negative immediate values.
174 Normally values in the range -999 to 999 are printed as signed decimal
175 values and other values are printed in hex. */
177 #define TIC80_OPERAND_BITFIELD (1 << 6)
179 /* This operand may have a ":m" modifier specified by bit 17 in a short
180 immediate form instruction. */
182 #define TIC80_OPERAND_M_SI (1 << 7)
184 /* This operand may have a ":m" modifier specified by bit 15 in a long
185 immediate or register form instruction. */
187 #define TIC80_OPERAND_M_LI (1 << 8)
189 /* This operand may have a ":s" modifier specified in bit 11 in a long
190 immediate or register form instruction. */
192 #define TIC80_OPERAND_SCALED (1 << 9)
194 /* This operand is a floating point value */
196 #define TIC80_OPERAND_FLOAT (1 << 10)
198 /* This operand is an byte offset from a base relocation. The lower
199 two bits of the final relocated address are ignored when the value is
200 written to the program counter. */
202 #define TIC80_OPERAND_BASEREL (1 << 11)
204 /* This operand is an "endmask" field for a shift instruction.
205 It is treated special in that it can have values of 0-32,
206 where 0 and 32 result in the same instruction. The assembler
207 must be able to accept both endmask values. This disassembler
208 has no way of knowing from the instruction which value was
209 given at assembly time, so it just uses '0'. */
211 #define TIC80_OPERAND_ENDMASK (1 << 12)
213 /* This operand is one of the 32 general purpose registers.
214 The disassembler prints these with a leading 'r'. */
216 #define TIC80_OPERAND_GPR (1 << 27)
218 /* This operand is a floating point accumulator register.
219 The disassembler prints these with a leading 'a'. */
221 #define TIC80_OPERAND_FPA ( 1 << 28)
223 /* This operand is a control register number, either numeric or
224 symbolic (like "EIF", "EPC", etc).
225 The disassembler prints these symbolically. */
227 #define TIC80_OPERAND_CR (1 << 29)
229 /* This operand is a condition code, either numeric or
230 symbolic (like "eq0.b", "ne0.w", etc).
231 The disassembler prints these symbolically. */
233 #define TIC80_OPERAND_CC (1 << 30)
235 /* This operand is a bit number, either numeric or
236 symbolic (like "eq.b", "or.f", etc).
237 The disassembler prints these symbolically.
238 Note that they appear in the instruction in 1's complement relative
239 to the values given in the manual. */
241 #define TIC80_OPERAND_BITNUM (1 << 31)
243 /* This mask is used to strip operand bits from an int that contains
244 both operand bits and a numeric value in the lsbs. */
246 #define TIC80_OPERAND_MASK (TIC80_OPERAND_GPR | TIC80_OPERAND_FPA | TIC80_OPERAND_CR | TIC80_OPERAND_CC | TIC80_OPERAND_BITNUM)
249 /* Flag bits for the struct tic80_opcode flags field. */
251 #define TIC80_VECTOR 01 /* Is a vector instruction */
252 #define TIC80_NO_R0_DEST 02 /* Register r0 cannot be a destination register */
255 /* The opcodes library contains a table that allows translation from predefined
256 symbol names to numeric values, and vice versa. */
258 /* Structure to hold information about predefined symbols. */
260 struct predefined_symbol
262 char *name; /* name to recognize */
266 #define PDS_NAME(pdsp) ((pdsp) -> name)
267 #define PDS_VALUE(pdsp) ((pdsp) -> value)
269 /* Translation array. */
270 extern const struct predefined_symbol tic80_predefined_symbols[];
271 /* How many members in the array. */
272 extern const int tic80_num_predefined_symbols;
274 /* Translate value to symbolic name. */
275 const char *tic80_value_to_symbol (int val, int class);
277 /* Translate symbolic name to value. */
278 int tic80_symbol_to_value (char *name, int class);
280 const struct predefined_symbol *tic80_next_predefined_symbol
281 (const struct predefined_symbol *);