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/* Internal definitions for configurable Xtensa ISA support.
Copyright 2003 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Use the statically-linked version for the GNU tools. */
#define STATIC_LIBISA 1
#define ISA_INTERFACE_VERSION 3
struct config_struct
{
char *param_name;
char *param_value;
};
/* Encode/decode function types for immediate operands. */
typedef uint32 (*xtensa_immed_decode_fn) (uint32);
typedef xtensa_encode_result (*xtensa_immed_encode_fn) (uint32 *);
/* Field accessor function types. */
typedef uint32 (*xtensa_get_field_fn) (const xtensa_insnbuf);
typedef void (*xtensa_set_field_fn) (xtensa_insnbuf, uint32);
/* PC-relative relocation function types. */
typedef uint32 (*xtensa_do_reloc_fn) (uint32, uint32);
typedef uint32 (*xtensa_undo_reloc_fn) (uint32, uint32);
/* Instruction decode function type. */
typedef int (*xtensa_insn_decode_fn) (const xtensa_insnbuf);
/* Instruction encoding template function type (each of these functions
returns a constant template; they exist only to make it easier for the
TIE compiler to generate endian-independent DLLs). */
typedef xtensa_insnbuf (*xtensa_encoding_template_fn) (void);
typedef struct xtensa_operand_internal_struct
{
char *operand_kind; /* e.g., "a", "f", "i", "l".... */
char inout; /* '<', '>', or '='. */
char isPCRelative; /* Is this a PC-relative offset? */
xtensa_get_field_fn get_field; /* Get encoded value of the field. */
xtensa_set_field_fn set_field; /* Set field with an encoded value. */
xtensa_immed_encode_fn encode; /* Encode the operand value. */
xtensa_immed_decode_fn decode; /* Decode the value from the field. */
xtensa_do_reloc_fn do_reloc; /* Perform a PC-relative relocation. */
xtensa_undo_reloc_fn undo_reloc; /* Undo a PC-relative relocation. */
} xtensa_operand_internal;
typedef struct xtensa_iclass_internal_struct
{
int num_operands; /* Size of "operands" array. */
xtensa_operand_internal **operands; /* Array of operand structures. */
} xtensa_iclass_internal;
typedef struct xtensa_opcode_internal_struct
{
const char *name; /* Opcode mnemonic. */
int length; /* Length in bytes of the insn. */
xtensa_encoding_template_fn template; /* Fn returning encoding template. */
xtensa_iclass_internal *iclass; /* Iclass for this opcode. */
} xtensa_opcode_internal;
typedef struct opname_lookup_entry_struct
{
const char *key; /* Opcode mnemonic. */
xtensa_opcode opcode; /* Internal opcode number. */
} opname_lookup_entry;
typedef struct xtensa_isa_internal_struct
{
int is_big_endian; /* Endianness. */
int insn_size; /* Maximum length in bytes. */
int insnbuf_size; /* Number of insnbuf_words. */
int num_opcodes; /* Total number for all modules. */
xtensa_opcode_internal **opcode_table;/* Indexed by internal opcode #. */
int num_modules; /* Number of modules (DLLs) loaded. */
int *module_opcode_base; /* Starting opcode # for each module. */
xtensa_insn_decode_fn *module_decode_fn; /* Decode fn for each module. */
opname_lookup_entry *opname_lookup_table; /* Lookup table for each module. */
struct config_struct *config; /* Table of configuration parameters. */
int has_density; /* Is density option available? */
} xtensa_isa_internal;
typedef struct xtensa_isa_module_struct
{
int (*get_num_opcodes_fn) (void);
xtensa_opcode_internal **(*get_opcodes_fn) (void);
int (*decode_insn_fn) (const xtensa_insnbuf);
struct config_struct *(*get_config_table_fn) (void);
} xtensa_isa_module;
extern xtensa_isa_module xtensa_isa_modules[];
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