1 /* Internal definitions for configurable Xtensa ISA support.
2 Copyright (C) 2003-2019 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
21 #ifndef XTENSA_ISA_INTERNAL_H
22 #define XTENSA_ISA_INTERNAL_H
26 #define XTENSA_OPERAND_IS_REGISTER 0x00000001
27 #define XTENSA_OPERAND_IS_PCRELATIVE 0x00000002
28 #define XTENSA_OPERAND_IS_INVISIBLE 0x00000004
29 #define XTENSA_OPERAND_IS_UNKNOWN 0x00000008
31 #define XTENSA_OPCODE_IS_BRANCH 0x00000001
32 #define XTENSA_OPCODE_IS_JUMP 0x00000002
33 #define XTENSA_OPCODE_IS_LOOP 0x00000004
34 #define XTENSA_OPCODE_IS_CALL 0x00000008
36 #define XTENSA_STATE_IS_EXPORTED 0x00000001
37 #define XTENSA_STATE_IS_SHARED_OR 0x00000002
39 #define XTENSA_INTERFACE_HAS_SIDE_EFFECT 0x00000001
41 /* Function pointer typedefs */
42 typedef void (*xtensa_format_encode_fn) (xtensa_insnbuf);
43 typedef void (*xtensa_get_slot_fn) (const xtensa_insnbuf, xtensa_insnbuf);
44 typedef void (*xtensa_set_slot_fn) (xtensa_insnbuf, const xtensa_insnbuf);
45 typedef int (*xtensa_opcode_decode_fn) (const xtensa_insnbuf);
46 typedef uint32 (*xtensa_get_field_fn) (const xtensa_insnbuf);
47 typedef void (*xtensa_set_field_fn) (xtensa_insnbuf, uint32);
48 typedef int (*xtensa_immed_decode_fn) (uint32 *);
49 typedef int (*xtensa_immed_encode_fn) (uint32 *);
50 typedef int (*xtensa_do_reloc_fn) (uint32 *, uint32);
51 typedef int (*xtensa_undo_reloc_fn) (uint32 *, uint32);
52 typedef void (*xtensa_opcode_encode_fn) (xtensa_insnbuf);
53 typedef int (*xtensa_format_decode_fn) (const xtensa_insnbuf);
54 typedef int (*xtensa_length_decode_fn) (const unsigned char *);
56 typedef struct xtensa_format_internal_struct
58 const char *name; /* Instruction format name. */
59 int length; /* Instruction length in bytes. */
60 xtensa_format_encode_fn encode_fn;
62 int *slot_id; /* Array[num_slots] of slot IDs. */
63 } xtensa_format_internal;
65 typedef struct xtensa_slot_internal_struct
67 const char *name; /* Not necessarily unique. */
70 xtensa_get_slot_fn get_fn;
71 xtensa_set_slot_fn set_fn;
72 xtensa_get_field_fn *get_field_fns; /* Array[field_id]. */
73 xtensa_set_field_fn *set_field_fns; /* Array[field_id]. */
74 xtensa_opcode_decode_fn opcode_decode_fn;
76 } xtensa_slot_internal;
78 typedef struct xtensa_operand_internal_struct
82 xtensa_regfile regfile; /* Register file. */
83 int num_regs; /* Usually 1; 2 for reg pairs, etc. */
84 uint32 flags; /* See XTENSA_OPERAND_* flags. */
85 xtensa_immed_encode_fn encode; /* Encode the operand value. */
86 xtensa_immed_decode_fn decode; /* Decode the value from the field. */
87 xtensa_do_reloc_fn do_reloc; /* Perform a PC-relative reloc. */
88 xtensa_undo_reloc_fn undo_reloc; /* Undo a PC-relative relocation. */
89 } xtensa_operand_internal;
91 typedef struct xtensa_arg_internal_struct
94 int operand_id; /* For normal operands. */
95 xtensa_state state; /* For stateOperands. */
97 char inout; /* Direction: 'i', 'o', or 'm'. */
98 } xtensa_arg_internal;
100 typedef struct xtensa_iclass_internal_struct
102 int num_operands; /* Size of "operands" array. */
103 xtensa_arg_internal *operands; /* Array[num_operands]. */
105 int num_stateOperands; /* Size of "stateOperands" array. */
106 xtensa_arg_internal *stateOperands; /* Array[num_stateOperands]. */
108 int num_interfaceOperands; /* Size of "interfaceOperands". */
109 xtensa_interface *interfaceOperands; /* Array[num_interfaceOperands]. */
110 } xtensa_iclass_internal;
112 typedef struct xtensa_opcode_internal_struct
114 const char *name; /* Opcode mnemonic. */
115 int iclass_id; /* Iclass for this opcode. */
116 uint32 flags; /* See XTENSA_OPCODE_* flags. */
117 xtensa_opcode_encode_fn *encode_fns; /* Array[slot_id]. */
118 int num_funcUnit_uses; /* Number of funcUnit_use entries. */
119 xtensa_funcUnit_use *funcUnit_uses; /* Array[num_funcUnit_uses]. */
120 } xtensa_opcode_internal;
122 typedef struct xtensa_regfile_internal_struct
124 const char *name; /* Full name of the regfile. */
125 const char *shortname; /* Abbreviated name. */
126 xtensa_regfile parent; /* View parent (or identity). */
127 int num_bits; /* Width of the registers. */
128 int num_entries; /* Number of registers. */
129 } xtensa_regfile_internal;
131 typedef struct xtensa_interface_internal_struct
133 const char *name; /* Interface name. */
134 int num_bits; /* Width of the interface. */
135 uint32 flags; /* See XTENSA_INTERFACE_* flags. */
136 int class_id; /* Class of related interfaces. */
137 char inout; /* "i" or "o". */
138 } xtensa_interface_internal;
140 typedef struct xtensa_funcUnit_internal_struct
142 const char *name; /* Functional unit name. */
143 int num_copies; /* Number of instances. */
144 } xtensa_funcUnit_internal;
146 typedef struct xtensa_state_internal_struct
148 const char *name; /* State name. */
149 int num_bits; /* Number of state bits. */
150 uint32 flags; /* See XTENSA_STATE_* flags. */
151 } xtensa_state_internal;
153 typedef struct xtensa_sysreg_internal_struct
155 const char *name; /* Register name. */
156 int number; /* Register number. */
157 int is_user; /* Non-zero if a "user register". */
158 } xtensa_sysreg_internal;
160 typedef struct xtensa_lookup_entry_struct
165 xtensa_opcode opcode; /* Internal opcode number. */
166 xtensa_sysreg sysreg; /* Internal sysreg number. */
167 xtensa_state state; /* Internal state number. */
168 xtensa_interface intf; /* Internal interface number. */
169 xtensa_funcUnit fun; /* Internal funcUnit number. */
171 } xtensa_lookup_entry;
173 typedef struct xtensa_isa_internal_struct
175 int is_big_endian; /* Endianness. */
176 int insn_size; /* Maximum length in bytes. */
177 int insnbuf_size; /* Number of insnbuf_words. */
180 xtensa_format_internal *formats;
181 xtensa_format_decode_fn format_decode_fn;
182 xtensa_length_decode_fn length_decode_fn;
185 xtensa_slot_internal *slots;
190 xtensa_operand_internal *operands;
193 xtensa_iclass_internal *iclasses;
196 xtensa_opcode_internal *opcodes;
197 xtensa_lookup_entry *opname_lookup_table;
200 xtensa_regfile_internal *regfiles;
203 xtensa_state_internal *states;
204 xtensa_lookup_entry *state_lookup_table;
207 xtensa_sysreg_internal *sysregs;
208 xtensa_lookup_entry *sysreg_lookup_table;
210 /* The current Xtensa ISA only supports 256 of each kind of sysreg so
211 we can get away with implementing lookups with tables indexed by
212 the register numbers. If we ever allow larger sysreg numbers, this
213 may have to be reimplemented. The first entry in the following
214 arrays corresponds to "special" registers and the second to "user"
216 int max_sysreg_num[2];
217 xtensa_sysreg *sysreg_table[2];
220 xtensa_interface_internal *interfaces;
221 xtensa_lookup_entry *interface_lookup_table;
224 xtensa_funcUnit_internal *funcUnits;
225 xtensa_lookup_entry *funcUnit_lookup_table;
227 } xtensa_isa_internal;
229 extern int xtensa_isa_name_compare (const void *, const void *);
231 extern xtensa_isa_status xtisa_errno;
232 extern char xtisa_error_msg[];
234 #endif /* !XTENSA_ISA_INTERNAL_H */