1 /* Internal definitions for configurable Xtensa ISA support. 2 Copyright 2003 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 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 2 of the License, or 9 (at your option) any later version. 10 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. 15 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 19 20 /* Use the statically-linked version for the GNU tools. */ 21 #define STATIC_LIBISA 1 22 23 #define ISA_INTERFACE_VERSION 3 24 25 struct config_struct 26 { 27 char *param_name; 28 char *param_value; 29 }; 30 31 /* Encode/decode function types for immediate operands. */ 32 typedef uint32 (*xtensa_immed_decode_fn) (uint32); 33 typedef xtensa_encode_result (*xtensa_immed_encode_fn) (uint32 *); 34 35 /* Field accessor function types. */ 36 typedef uint32 (*xtensa_get_field_fn) (const xtensa_insnbuf); 37 typedef void (*xtensa_set_field_fn) (xtensa_insnbuf, uint32); 38 39 /* PC-relative relocation function types. */ 40 typedef uint32 (*xtensa_do_reloc_fn) (uint32, uint32); 41 typedef uint32 (*xtensa_undo_reloc_fn) (uint32, uint32); 42 43 /* Instruction decode function type. */ 44 typedef int (*xtensa_insn_decode_fn) (const xtensa_insnbuf); 45 46 /* Instruction encoding template function type (each of these functions 47 returns a constant template; they exist only to make it easier for the 48 TIE compiler to generate endian-independent DLLs). */ 49 typedef xtensa_insnbuf (*xtensa_encoding_template_fn) (void); 50 51 52 typedef struct xtensa_operand_internal_struct 53 { 54 char *operand_kind; /* e.g., "a", "f", "i", "l".... */ 55 char inout; /* '<', '>', or '='. */ 56 char isPCRelative; /* Is this a PC-relative offset? */ 57 xtensa_get_field_fn get_field; /* Get encoded value of the field. */ 58 xtensa_set_field_fn set_field; /* Set field with an encoded value. */ 59 xtensa_immed_encode_fn encode; /* Encode the operand value. */ 60 xtensa_immed_decode_fn decode; /* Decode the value from the field. */ 61 xtensa_do_reloc_fn do_reloc; /* Perform a PC-relative relocation. */ 62 xtensa_undo_reloc_fn undo_reloc; /* Undo a PC-relative relocation. */ 63 } xtensa_operand_internal; 64 65 66 typedef struct xtensa_iclass_internal_struct 67 { 68 int num_operands; /* Size of "operands" array. */ 69 xtensa_operand_internal **operands; /* Array of operand structures. */ 70 } xtensa_iclass_internal; 71 72 73 typedef struct xtensa_opcode_internal_struct 74 { 75 const char *name; /* Opcode mnemonic. */ 76 int length; /* Length in bytes of the insn. */ 77 xtensa_encoding_template_fn template; /* Fn returning encoding template. */ 78 xtensa_iclass_internal *iclass; /* Iclass for this opcode. */ 79 } xtensa_opcode_internal; 80 81 82 typedef struct opname_lookup_entry_struct 83 { 84 const char *key; /* Opcode mnemonic. */ 85 xtensa_opcode opcode; /* Internal opcode number. */ 86 } opname_lookup_entry; 87 88 89 typedef struct xtensa_isa_internal_struct 90 { 91 int is_big_endian; /* Endianness. */ 92 int insn_size; /* Maximum length in bytes. */ 93 int insnbuf_size; /* Number of insnbuf_words. */ 94 int num_opcodes; /* Total number for all modules. */ 95 xtensa_opcode_internal **opcode_table;/* Indexed by internal opcode #. */ 96 int num_modules; /* Number of modules (DLLs) loaded. */ 97 int *module_opcode_base; /* Starting opcode # for each module. */ 98 xtensa_insn_decode_fn *module_decode_fn; /* Decode fn for each module. */ 99 opname_lookup_entry *opname_lookup_table; /* Lookup table for each module. */ 100 struct config_struct *config; /* Table of configuration parameters. */ 101 int has_density; /* Is density option available? */ 102 } xtensa_isa_internal; 103 104 105 typedef struct xtensa_isa_module_struct 106 { 107 int (*get_num_opcodes_fn) (void); 108 xtensa_opcode_internal **(*get_opcodes_fn) (void); 109 int (*decode_insn_fn) (const xtensa_insnbuf); 110 struct config_struct *(*get_config_table_fn) (void); 111 } xtensa_isa_module; 112 113 extern xtensa_isa_module xtensa_isa_modules[]; 114 115