projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| c906108c SS |
1 | /* This file is part of the program psim. |
| 2 | ||
| 3 | Copyright (C) 1994-1997, Andrew Cagney <[email protected]> | |
| 4 | ||
| 5 | This program is free software; you can redistribute it and/or modify | |
| 6 | it under the terms of the GNU General Public License as published by | |
| 7 | the Free Software Foundation; either version 2 of the License, or | |
| 8 | (at your option) any later version. | |
| 9 | ||
| 10 | This program is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | GNU General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU General Public License | |
| 16 | along with this program; if not, write to the Free Software | |
| 17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 18 | ||
| 19 | */ | |
| 20 | ||
| 21 | /* Instruction unpacking: | |
| 22 | ||
| 23 | Once the instruction has been decoded, the register (and other) | |
| 24 | fields within the instruction need to be extracted. | |
| 25 | ||
| 26 | The table that follows determines how each field should be treated. | |
| 27 | Importantly it considers the case where the extracted field is to | |
| 28 | be used immediatly or stored in an instruction cache. | |
| 29 | ||
| 30 | <type> | |
| 31 | ||
| 32 | Indicates what to do with the cache entry. If a cache is to be | |
| 33 | used. SCRATCH and CACHE values are defined when a cache entry is | |
| 34 | being filled while CACHE and COMPUTE values are defined in the | |
| 35 | semantic code. | |
| 36 | ||
| 37 | Zero marks the end of the table. More importantly 1. indicates | |
| 38 | that the entry is valid and can be cached. 2. indicates that that | |
| 39 | the entry is valid but can not be cached. | |
| 40 | ||
| 41 | <field_name> | |
| 42 | ||
| 43 | The field name as given in the instruction spec. | |
| 44 | ||
| 45 | <derived_name> | |
| 46 | ||
| 47 | A new name for <field_name> once it has been extracted from the | |
| 48 | instruction (and possibly stored in the instruction cache). | |
| 49 | ||
| 50 | <type> | |
| 51 | ||
| 52 | String specifying the storage type for <new_name> (the extracted | |
| 53 | field>. | |
| 54 | ||
| 55 | <expression> | |
| 56 | ||
| 57 | Specifies how to get <new_name> from <old_name>. If null, old and | |
| 58 | new name had better be the same. */ | |
| 59 | ||
| 60 | ||
| 61 | typedef enum { | |
| 62 | scratch_value, | |
| 63 | cache_value, | |
| 64 | compute_value, | |
| 65 | } cache_rule_type; | |
| 66 | ||
| 67 | typedef struct _cache_table cache_table; | |
| 68 | struct _cache_table { | |
| 69 | cache_rule_type type; | |
| 70 | char *field_name; | |
| 71 | char *derived_name; | |
| 72 | char *type_def; | |
| 73 | char *expression; | |
| 74 | table_entry *file_entry; | |
| 75 | cache_table *next; | |
| 76 | }; | |
| 77 | ||
| 78 | ||
| 79 | extern cache_table *load_cache_table | |
| 80 | (char *file_name, | |
| 81 | int hi_bit_nr); |