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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /sim/igen/ld-cache.h
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
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diff --git a/sim/igen/ld-cache.h b/sim/igen/ld-cache.h
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-/* This file is part of the program psim.
-
- Copyright (C) 1994,1995,1996, Andrew Cagney <cagney@highland.com.au>
-
- 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.
-
- */
-
-/* Instruction unpacking:
-
- Once the instruction has been decoded, the register (and other)
- fields within the instruction need to be extracted.
-
- The table that follows determines how each field should be treated.
- Importantly it considers the case where the extracted field is to
- be used immediatly or stored in an instruction cache.
-
- <type>
-
- Indicates what to do with the cache entry. If a cache is to be
- used. SCRATCH and CACHE values are defined when a cache entry is
- being filled while CACHE and COMPUTE values are defined in the
- semantic code.
-
- Zero marks the end of the table. More importantly 1. indicates
- that the entry is valid and can be cached. 2. indicates that that
- the entry is valid but can not be cached.
-
- <field_name>
-
- The field name as given in the instruction spec.
-
- <derived_name>
-
- A new name for <field_name> once it has been extracted from the
- instruction (and possibly stored in the instruction cache).
-
- <type>
-
- String specifying the storage type for <new_name> (the extracted
- field>.
-
- <expression>
-
- Specifies how to get <new_name> from <old_name>. If null, old and
- new name had better be the same. */
-
-
-typedef enum {
- scratch_value,
- cache_value,
- compute_value,
-} cache_rule_type;
-
-typedef struct _cache_table cache_table;
-struct _cache_table {
- cache_rule_type type;
- char *field_name;
- char *derived_name;
- char *type_def;
- char *expression;
- table_entry *file_entry;
- cache_table *next;
-};
-
-
-extern cache_table *load_cache_table
-(char *file_name,
- int hi_bit_nr);