235 lines
7.9 KiB
C
235 lines
7.9 KiB
C
/* Internal definitions for configurable Xtensa ISA support.
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Copyright 2003, 2004, 2005, 2008 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
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USA. */
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#ifndef XTENSA_ISA_INTERNAL_H
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#define XTENSA_ISA_INTERNAL_H
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/* Flags. */
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#define XTENSA_OPERAND_IS_REGISTER 0x00000001
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#define XTENSA_OPERAND_IS_PCRELATIVE 0x00000002
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#define XTENSA_OPERAND_IS_INVISIBLE 0x00000004
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#define XTENSA_OPERAND_IS_UNKNOWN 0x00000008
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#define XTENSA_OPCODE_IS_BRANCH 0x00000001
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#define XTENSA_OPCODE_IS_JUMP 0x00000002
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#define XTENSA_OPCODE_IS_LOOP 0x00000004
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#define XTENSA_OPCODE_IS_CALL 0x00000008
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#define XTENSA_STATE_IS_EXPORTED 0x00000001
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#define XTENSA_STATE_IS_SHARED_OR 0x00000002
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#define XTENSA_INTERFACE_HAS_SIDE_EFFECT 0x00000001
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/* Function pointer typedefs */
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typedef void (*xtensa_format_encode_fn) (xtensa_insnbuf);
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typedef void (*xtensa_get_slot_fn) (const xtensa_insnbuf, xtensa_insnbuf);
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typedef void (*xtensa_set_slot_fn) (xtensa_insnbuf, const xtensa_insnbuf);
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typedef int (*xtensa_opcode_decode_fn) (const xtensa_insnbuf);
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typedef uint32 (*xtensa_get_field_fn) (const xtensa_insnbuf);
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typedef void (*xtensa_set_field_fn) (xtensa_insnbuf, uint32);
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typedef int (*xtensa_immed_decode_fn) (uint32 *);
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typedef int (*xtensa_immed_encode_fn) (uint32 *);
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typedef int (*xtensa_do_reloc_fn) (uint32 *, uint32);
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typedef int (*xtensa_undo_reloc_fn) (uint32 *, uint32);
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typedef void (*xtensa_opcode_encode_fn) (xtensa_insnbuf);
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typedef int (*xtensa_format_decode_fn) (const xtensa_insnbuf);
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typedef int (*xtensa_length_decode_fn) (const unsigned char *);
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typedef struct xtensa_format_internal_struct
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{
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const char *name; /* Instruction format name. */
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int length; /* Instruction length in bytes. */
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xtensa_format_encode_fn encode_fn;
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int num_slots;
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int *slot_id; /* Array[num_slots] of slot IDs. */
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} xtensa_format_internal;
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typedef struct xtensa_slot_internal_struct
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{
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const char *name; /* Not necessarily unique. */
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const char *format;
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int position;
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xtensa_get_slot_fn get_fn;
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xtensa_set_slot_fn set_fn;
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xtensa_get_field_fn *get_field_fns; /* Array[field_id]. */
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xtensa_set_field_fn *set_field_fns; /* Array[field_id]. */
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xtensa_opcode_decode_fn opcode_decode_fn;
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const char *nop_name;
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} xtensa_slot_internal;
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typedef struct xtensa_operand_internal_struct
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{
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const char *name;
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int field_id;
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xtensa_regfile regfile; /* Register file. */
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int num_regs; /* Usually 1; 2 for reg pairs, etc. */
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uint32 flags; /* See XTENSA_OPERAND_* flags. */
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xtensa_immed_encode_fn encode; /* Encode the operand value. */
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xtensa_immed_decode_fn decode; /* Decode the value from the field. */
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xtensa_do_reloc_fn do_reloc; /* Perform a PC-relative reloc. */
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xtensa_undo_reloc_fn undo_reloc; /* Undo a PC-relative relocation. */
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} xtensa_operand_internal;
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typedef struct xtensa_arg_internal_struct
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{
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union {
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int operand_id; /* For normal operands. */
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xtensa_state state; /* For stateOperands. */
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} u;
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char inout; /* Direction: 'i', 'o', or 'm'. */
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} xtensa_arg_internal;
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typedef struct xtensa_iclass_internal_struct
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{
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int num_operands; /* Size of "operands" array. */
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xtensa_arg_internal *operands; /* Array[num_operands]. */
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int num_stateOperands; /* Size of "stateOperands" array. */
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xtensa_arg_internal *stateOperands; /* Array[num_stateOperands]. */
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int num_interfaceOperands; /* Size of "interfaceOperands". */
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xtensa_interface *interfaceOperands; /* Array[num_interfaceOperands]. */
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} xtensa_iclass_internal;
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typedef struct xtensa_opcode_internal_struct
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{
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const char *name; /* Opcode mnemonic. */
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int iclass_id; /* Iclass for this opcode. */
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uint32 flags; /* See XTENSA_OPCODE_* flags. */
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xtensa_opcode_encode_fn *encode_fns; /* Array[slot_id]. */
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int num_funcUnit_uses; /* Number of funcUnit_use entries. */
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xtensa_funcUnit_use *funcUnit_uses; /* Array[num_funcUnit_uses]. */
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} xtensa_opcode_internal;
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typedef struct xtensa_regfile_internal_struct
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{
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const char *name; /* Full name of the regfile. */
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const char *shortname; /* Abbreviated name. */
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xtensa_regfile parent; /* View parent (or identity). */
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int num_bits; /* Width of the registers. */
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int num_entries; /* Number of registers. */
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} xtensa_regfile_internal;
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typedef struct xtensa_interface_internal_struct
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{
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const char *name; /* Interface name. */
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int num_bits; /* Width of the interface. */
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uint32 flags; /* See XTENSA_INTERFACE_* flags. */
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int class_id; /* Class of related interfaces. */
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char inout; /* "i" or "o". */
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} xtensa_interface_internal;
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typedef struct xtensa_funcUnit_internal_struct
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{
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const char *name; /* Functional unit name. */
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int num_copies; /* Number of instances. */
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} xtensa_funcUnit_internal;
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typedef struct xtensa_state_internal_struct
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{
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const char *name; /* State name. */
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int num_bits; /* Number of state bits. */
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uint32 flags; /* See XTENSA_STATE_* flags. */
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} xtensa_state_internal;
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typedef struct xtensa_sysreg_internal_struct
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{
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const char *name; /* Register name. */
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int number; /* Register number. */
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int is_user; /* Non-zero if a "user register". */
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} xtensa_sysreg_internal;
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typedef struct xtensa_lookup_entry_struct
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{
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const char *key;
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union
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{
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xtensa_opcode opcode; /* Internal opcode number. */
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xtensa_sysreg sysreg; /* Internal sysreg number. */
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xtensa_state state; /* Internal state number. */
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xtensa_interface intf; /* Internal interface number. */
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xtensa_funcUnit fun; /* Internal funcUnit number. */
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} u;
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} xtensa_lookup_entry;
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typedef struct xtensa_isa_internal_struct
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{
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int is_big_endian; /* Endianness. */
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int insn_size; /* Maximum length in bytes. */
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int insnbuf_size; /* Number of insnbuf_words. */
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int num_formats;
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xtensa_format_internal *formats;
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xtensa_format_decode_fn format_decode_fn;
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xtensa_length_decode_fn length_decode_fn;
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int num_slots;
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xtensa_slot_internal *slots;
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int num_fields;
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int num_operands;
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xtensa_operand_internal *operands;
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int num_iclasses;
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xtensa_iclass_internal *iclasses;
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int num_opcodes;
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xtensa_opcode_internal *opcodes;
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xtensa_lookup_entry *opname_lookup_table;
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int num_regfiles;
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xtensa_regfile_internal *regfiles;
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int num_states;
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xtensa_state_internal *states;
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xtensa_lookup_entry *state_lookup_table;
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int num_sysregs;
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xtensa_sysreg_internal *sysregs;
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xtensa_lookup_entry *sysreg_lookup_table;
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/* The current Xtensa ISA only supports 256 of each kind of sysreg so
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we can get away with implementing lookups with tables indexed by
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the register numbers. If we ever allow larger sysreg numbers, this
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may have to be reimplemented. The first entry in the following
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arrays corresponds to "special" registers and the second to "user"
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registers. */
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int max_sysreg_num[2];
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xtensa_sysreg *sysreg_table[2];
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int num_interfaces;
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xtensa_interface_internal *interfaces;
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xtensa_lookup_entry *interface_lookup_table;
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int num_funcUnits;
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xtensa_funcUnit_internal *funcUnits;
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xtensa_lookup_entry *funcUnit_lookup_table;
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} xtensa_isa_internal;
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extern int xtensa_isa_name_compare (const void *, const void *);
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extern xtensa_isa_status xtisa_errno;
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extern char xtisa_error_msg[];
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#endif /* !XTENSA_ISA_INTERNAL_H */
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