projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| e0001a05 NC |
1 | /* Table of relaxations for Xtensa assembly. |
| 2 | Copyright 2003 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This file is part of GAS, the GNU Assembler. | |
| 5 | ||
| 6 | GAS 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, or (at your option) | |
| 9 | any later version. | |
| 10 | ||
| 11 | GAS 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 GAS; see the file COPYING. If not, write to | |
| 18 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, | |
| 19 | MA 02111-1307, USA. */ | |
| 20 | ||
| 21 | #ifndef XTENSA_RELAX_H | |
| 22 | #define XTENSA_RELAX_H | |
| 23 | ||
| 24 | #include "xtensa-isa.h" | |
| 25 | ||
| 26 | ||
| 27 | /* Data structures for the table-driven relaxations for Xtensa processors. | |
| 28 | See xtensa-relax.c for details. */ | |
| 29 | ||
| 30 | typedef struct transition_list TransitionList; | |
| 31 | typedef struct transition_table TransitionTable; | |
| 32 | typedef struct transition_rule TransitionRule; | |
| 33 | typedef struct precondition_list PreconditionList; | |
| 34 | typedef struct precondition Precondition; | |
| 35 | ||
| 36 | struct transition_table | |
| 37 | { | |
| 38 | int num_opcodes; | |
| 39 | TransitionList **table; /* Possible transitions for each opcode. */ | |
| 40 | }; | |
| 41 | ||
| 42 | struct transition_list | |
| 43 | { | |
| 44 | TransitionRule *rule; | |
| 45 | TransitionList *next; | |
| 46 | }; | |
| 47 | ||
| 48 | struct precondition_list | |
| 49 | { | |
| 50 | Precondition *precond; | |
| 51 | PreconditionList *next; | |
| 52 | }; | |
| 53 | ||
| 54 | ||
| 55 | /* Operand types and constraints on operands: */ | |
| 56 | ||
| 57 | typedef enum op_type OpType; | |
| 58 | typedef enum cmp_op CmpOp; | |
| 59 | ||
| 60 | enum op_type | |
| 61 | { | |
| 62 | OP_CONSTANT, | |
| 63 | OP_OPERAND, | |
| 64 | OP_OPERAND_LOW8, /* Sign-extended low 8 bits of immed. */ | |
| 65 | OP_OPERAND_HI24S, /* high 24 bits of immed, | |
| 66 | plus 0x100 if low 8 bits are signed. */ | |
| 67 | OP_OPERAND_F32MINUS, /* 32 - immed. */ | |
| 68 | OP_LITERAL, | |
| 69 | OP_LABEL | |
| 70 | }; | |
| 71 | ||
| 72 | enum cmp_op | |
| 73 | { | |
| 74 | OP_EQUAL, | |
| 75 | OP_NOTEQUAL, | |
| 76 | }; | |
| 77 | ||
| 78 | struct precondition | |
| 79 | { | |
| 80 | CmpOp cmp; | |
| 81 | int op_num; | |
| 82 | OpType typ; /* CONSTANT: op_data is a constant. | |
| 83 | OPERAND: operand op_num must equal op_data. | |
| 84 | Cannot be LITERAL or LABEL. */ | |
| 85 | int op_data; | |
| 86 | }; | |
| 87 | ||
| 88 | typedef struct build_op BuildOp; | |
| 89 | ||
| 90 | struct build_op | |
| 91 | { | |
| 92 | int op_num; | |
| 93 | OpType typ; | |
| 94 | unsigned op_data; /* CONSTANT: op_data is the value to encode. | |
| 95 | OPERAND: op_data is the field in the | |
| 96 | source instruction to take the value from | |
| 97 | and encode in the op_num field here. | |
| 98 | LITERAL or LABEL: op_data is the ordinal | |
| 99 | that identifies the appropriate one, i.e., | |
| 100 | there can be more than one literal or | |
| 101 | label in an expansion. */ | |
| 102 | BuildOp *next; | |
| 103 | }; | |
| 104 | ||
| 105 | typedef struct build_instr BuildInstr; | |
| 106 | typedef enum instr_type InstrType; | |
| 107 | ||
| 108 | enum instr_type | |
| 109 | { | |
| 110 | INSTR_INSTR, | |
| 111 | INSTR_LITERAL_DEF, | |
| 112 | INSTR_LABEL_DEF | |
| 113 | }; | |
| 114 | ||
| 115 | struct build_instr | |
| 116 | { | |
| 117 | InstrType typ; | |
| 118 | unsigned id; /* LITERAL_DEF or LABEL_DEF: an ordinal to | |
| 119 | identify which one. */ | |
| 120 | xtensa_opcode opcode; /* unused for LITERAL_DEF or LABEL_DEF. */ | |
| 121 | BuildOp *ops; | |
| 122 | BuildInstr *next; | |
| 123 | }; | |
| 124 | ||
| 125 | struct transition_rule | |
| 126 | { | |
| 127 | xtensa_opcode opcode; | |
| 128 | PreconditionList *conditions; | |
| 129 | BuildInstr *to_instr; | |
| 130 | }; | |
| 131 | ||
| 132 | extern TransitionTable *xg_build_simplify_table | |
| 133 | PARAMS ((void)); | |
| 134 | extern TransitionTable *xg_build_widen_table | |
| 135 | PARAMS ((void)); | |
| 136 | ||
| 137 | extern bfd_boolean xg_has_userdef_op_fn | |
| 138 | PARAMS ((OpType)); | |
| 139 | extern long xg_apply_userdef_op_fn | |
| 140 | PARAMS ((OpType, long)); | |
| 141 | ||
| 142 | #endif /* !XTENSA_RELAX_H */ |